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Author SHA1 Message Date
Siddhesh Poyarekar
fb1621a886 manual: Drop the .so suffix in libc_malloc_debug description 
All references to libraries in the manual are without the .so prefix,
so do the same for libc_malloc_debug.

Reviewed-by: Carlos O'Donell <carlos@redhat.com>
 2021-07-27 07:54:46 +05:30
Siddhesh Poyarekar
2d2d9f2b48 Move malloc hooks into a compat DSO 
Remove all malloc hook uses from core malloc functions and move it
into a new library libc_malloc_debug.so.  With this, the hooks now no
longer have any effect on the core library.

libc_malloc_debug.so is a malloc interposer that needs to be preloaded
to get hooks functionality back so that the debugging features that
depend on the hooks, i.e. malloc-check, mcheck and mtrace work again.
Without the preloaded DSO these debugging features will be nops.
These features will be ported away from hooks in subsequent patches.

Similarly, legacy applications that need hooks functionality need to
preload libc_malloc_debug.so.

The symbols exported by libc_malloc_debug.so are maintained at exactly
the same version as libc.so.

Finally, static binaries will no longer be able to use malloc
debugging features since they cannot preload the debugging DSO.

Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Tested-by: Carlos O'Donell <carlos@redhat.com>
 2021-07-22 18:37:59 +05:30
Siddhesh Poyarekar
83e55c982f glibc.malloc.check: Fix nit in documentation 
The tunable will not work with *any* non-zero tunable value since its
list of allowed values is 0-3.  Fix the documentation to reflect that.

Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
 2021-07-07 07:02:13 +05:30
Florian Weimer
dd45734e32 nptl: Add glibc.pthread.stack_cache_size tunable 
The valgrind/helgrind test suite needs a way to make stack dealloction
more prompt, and this feature seems to be generally useful.

Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
 2021-06-28 16:41:58 +02:00
Naohiro Tamura
fa527f345c aarch64: Added optimized memcpy and memmove for A64FX 
This patch optimizes the performance of memcpy/memmove for A64FX [1]
which implements ARMv8-A SVE and has L1 64KB cache per core and L2 8MB
cache per NUMA node.

The performance optimization makes use of Scalable Vector Register
with several techniques such as loop unrolling, memory access
alignment, cache zero fill, and software pipelining.

SVE assembler code for memcpy/memmove is implemented as Vector Length
Agnostic code so theoretically it can be run on any SOC which supports
ARMv8-A SVE standard.

We confirmed that all testcases have been passed by running 'make
check' and 'make xcheck' not only on A64FX but also on ThunderX2.

And also we confirmed that the SVE 512 bit vector register performance
is roughly 4 times better than Advanced SIMD 128 bit register and 8
times better than scalar 64 bit register by running 'make bench'.

[1] https://github.com/fujitsu/A64FX

Reviewed-by: Wilco Dijkstra <Wilco.Dijkstra@arm.com>
Reviewed-by: Szabolcs Nagy <Szabolcs.Nagy@arm.com>
 2021-05-27 09:47:53 +01:00
Paul Eggert
bdc674d97b Improve documentation for malloc etc. (BZ#27719) 
Cover key corner cases (e.g., whether errno is set) that are well
settled in glibc, fix some examples to avoid integer overflow, and
update some other dated examples (code needed for K&R C, e.g.).
* manual/charset.texi (Non-reentrant String Conversion):
* manual/filesys.texi (Symbolic Links):
* manual/memory.texi (Allocating Cleared Space):
* manual/socket.texi (Host Names):
* manual/string.texi (Concatenating Strings):
* manual/users.texi (Setting Groups):
Use reallocarray instead of realloc, to avoid integer overflow issues.
* manual/filesys.texi (Scanning Directory Content):
* manual/memory.texi (The GNU Allocator, Hooks for Malloc):
* manual/tunables.texi:
Use code font for 'malloc' instead of roman font.
(Symbolic Links): Don't assume readlink return value fits in 'int'.
* manual/memory.texi (Memory Allocation and C, Basic Allocation)
(Malloc Examples, Alloca Example):
* manual/stdio.texi (Formatted Output Functions):
* manual/string.texi (Concatenating Strings, Collation Functions):
Omit pointer casts that are needed only in ancient K&R C.
* manual/memory.texi (Basic Allocation):
Say that malloc sets errno on failure.
Say "convert" rather than "cast", since casts are no longer needed.
* manual/memory.texi (Basic Allocation):
* manual/string.texi (Concatenating Strings):
In examples, use C99 declarations after statements for brevity.
* manual/memory.texi (Malloc Examples): Add portability notes for
malloc (0), errno setting, and PTRDIFF_MAX.
(Changing Block Size): Say that realloc (p, 0) acts like
(p ? (free (p), NULL) : malloc (0)).
Add xreallocarray example, since other examples can use it.
Add portability notes for realloc (0, 0), realloc (p, 0),
PTRDIFF_MAX, and improve notes for reallocating to the same size.
(Allocating Cleared Space): Reword now-confusing discussion
about replacement, and xref "Replacing malloc".
* manual/stdio.texi (Formatted Output Functions):
Don't assume message size fits in 'int'.
* manual/string.texi (Concatenating Strings):
Fix undefined behavior involving arithmetic on a freed pointer.
 2021-04-13 12:17:56 -07:00
H.J. Lu
86f65dffc2 ld.so: Add --list-tunables to print tunable values 
Pass --list-tunables to ld.so to print tunables with min and max values.

Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
 2021-01-15 05:59:10 -08:00
Richard Earnshaw
26450d04d3 elf: Add a tunable to control use of tagged memory 
Add a new glibc tunable: mem.tagging.  This is a decimal constant in
the range 0-255 but used as a bit-field.

Bit 0 enables use of tagged memory in the malloc family of functions.
Bit 1 enables precise faulting of tag failure on platforms where this
can be controlled.
Other bits are currently unused, but if set will cause memory tag
checking for the current process to be enabled in the kernel.
 2020-12-21 15:25:25 +00:00
Patrick McGehearty
d3c5702747 Reversing calculation of __x86_shared_non_temporal_threshold 
The __x86_shared_non_temporal_threshold determines when memcpy on x86
uses non_temporal stores to avoid pushing other data out of the last
level cache.

This patch proposes to revert the calculation change made by H.J. Lu's
patch of June 2, 2017.

H.J. Lu's patch selected a threshold suitable for a single thread
getting maximum performance. It was tuned using the single threaded
large memcpy micro benchmark on an 8 core processor. The last change
changes the threshold from using 3/4 of one thread's share of the
cache to using 3/4 of the entire cache of a multi-threaded system
before switching to non-temporal stores. Multi-threaded systems with
more than a few threads are server-class and typically have many
active threads. If one thread consumes 3/4 of the available cache for
all threads, it will cause other active threads to have data removed
from the cache. Two examples show the range of the effect. John
McCalpin's widely parallel Stream benchmark, which runs in parallel
and fetches data sequentially, saw a 20% slowdown with this patch on
an internal system test of 128 threads. This regression was discovered
when comparing OL8 performance to OL7.  An example that compares
normal stores to non-temporal stores may be found at
https://vgatherps.github.io/2018-09-02-nontemporal/.  A simple test
shows performance loss of 400 to 500% due to a failure to use
nontemporal stores. These performance losses are most likely to occur
when the system load is heaviest and good performance is critical.

The tunable x86_non_temporal_threshold can be used to override the
default for the knowledgable user who really wants maximum cache
allocation to a single thread in a multi-threaded system.
The manual entry for the tunable has been expanded to provide
more information about its purpose.

	modified: sysdeps/x86/cacheinfo.c
	modified: manual/tunables.texi
 2020-09-28 22:10:39 +00:00
Szabolcs Nagy
ffb17e7ba3 rtld: Avoid using up static TLS surplus for optimizations [BZ #25051] 
On some targets static TLS surplus area can be used opportunistically
for dynamically loaded modules such that the TLS access then becomes
faster (TLSDESC and powerpc TLS optimization). However we don't want
all surplus TLS to be used for this optimization because dynamically
loaded modules with initial-exec model TLS can only use surplus TLS.

The new contract for surplus static TLS use is:

- libc.so can have up to 192 bytes of IE TLS,
- other system libraries together can have up to 144 bytes of IE TLS.
- Some "optional" static TLS is available for opportunistic use.

The optional TLS is now tunable: rtld.optional_static_tls, so users
can directly affect the allocated static TLS size. (Note that module
unloading with dlclose does not reclaim static TLS. After the optional
TLS runs out, TLS access is no longer optimized to use static TLS.)

The default setting of rtld.optional_static_tls is 512 so the surplus
TLS is 3*192 + 4*144 + 512 = 1664 by default, the same as before.

Fixes BZ #25051.

Tested on aarch64-linux-gnu and x86_64-linux-gnu.

Reviewed-by: Carlos O'Donell <carlos@redhat.com>
 2020-07-08 17:32:56 +01:00
Szabolcs Nagy
17796419b5 rtld: Account static TLS surplus for audit modules 
The new static TLS surplus size computation is

  surplus_tls = 192 * (nns-1) + 144 * nns + 512

where nns is controlled via the rtld.nns tunable. This commit
accounts audit modules too so nns = rtld.nns + audit modules.

rtld.nns should only include the namespaces required by the
application, namespaces for audit modules are accounted on top
of that so audit modules don't use up the static TLS that is
reserved for the application. This allows loading many audit
modules without tuning rtld.nns or using up static TLS, and it
fixes

FAIL: elf/tst-auditmany

Note that DL_NNS is currently a hard upper limit for nns, and
if rtld.nns + audit modules go over the limit that's a fatal
error. By default rtld.nns is 4 which allows 12 audit modules.

Counting the audit modules is based on existing audit string
parsing code, we cannot use GLRO(dl_naudit) before the modules
are actually loaded.
 2020-07-08 17:32:56 +01:00
Szabolcs Nagy
0c7b002fac rtld: Add rtld.nns tunable for the number of supported namespaces 
TLS_STATIC_SURPLUS is 1664 bytes currently which is not enough to
support DL_NNS (== 16) number of dynamic link namespaces, if we
assume 192 bytes of TLS are reserved for libc use and 144 bytes
are reserved for other system libraries that use IE TLS.

A new tunable is introduced to control the number of supported
namespaces and to adjust the surplus static TLS size as follows:

surplus_tls = 192 * (rtld.nns-1) + 144 * rtld.nns + 512

The default is rtld.nns == 4 and then the surplus TLS size is the
same as before, so the behaviour is unchanged by default. If an
application creates more namespaces than the rtld.nns setting
allows, then it is not guaranteed to work, but the limit is not
checked. So existing usage will continue to work, but in the
future if an application creates more than 4 dynamic link
namespaces then the tunable will need to be set.

In this patch DL_NNS is a fixed value and provides a maximum to
the rtld.nns setting.

Static linking used fixed 2048 bytes surplus TLS, this is changed
so the same contract is used as for dynamic linking.  With static
linking DL_NNS == 1 so rtld.nns tunable is forced to 1, so by
default the surplus TLS is reduced to 144 + 512 = 656 bytes. This
change is not expected to cause problems.

Tested on aarch64-linux-gnu and x86_64-linux-gnu.

Reviewed-by: Carlos O'Donell <carlos@redhat.com>
 2020-07-08 17:32:56 +01:00
H.J. Lu
3f4b61a0b8 x86: Add thresholds for "rep movsb/stosb" to tunables 
Add x86_rep_movsb_threshold and x86_rep_stosb_threshold to tunables
to update thresholds for "rep movsb" and "rep stosb" at run-time.

Note that the user specified threshold for "rep movsb" smaller than
the minimum threshold will be ignored.

Reviewed-by: Carlos O'Donell <carlos@redhat.com>
 2020-07-06 11:48:42 -07:00
Xuelei Zhang
0db8e7b366 aarch64: Add Huawei Kunpeng to tunable cpu list 
Kunpeng processer is a 64-bit Arm-compatible CPU released by Huawei,
and we have already signed a copyright assignement with the FSF.

This patch adds its to cpu list, and related macro for IFUNC.

Checked on aarch64-linux-gnu.

Reviewed-by: Szabolcs Nagy <Szabolcs.Nagy@arm.com>
 2019-12-19 16:31:04 -03:00
DJ Delorie
c48d92b430 Add glibc.malloc.mxfast tunable 
* elf/dl-tunables.list: Add glibc.malloc.mxfast.
* manual/tunables.texi: Document it.
* malloc/malloc.c (do_set_mxfast): New.
(__libc_mallopt): Call it.
* malloc/arena.c: Add mxfast tunable.
* malloc/tst-mxfast.c: New.
* malloc/Makefile: Add it.

Reviewed-by: Carlos O'Donell <carlos@redhat.com>
 2019-08-09 14:04:03 -04:00
Wilco Dijkstra
1f50f2ad85 Small tcache improvements 
Change the tcache->counts[] entries to uint16_t - this removes
the limit set by char and allows a larger tcache.  Remove a few
redundant asserts.

bench-malloc-thread with 4 threads is ~15% faster on Cortex-A72.

Reviewed-by: DJ Delorie <dj@redhat.com>

	* malloc/malloc.c (MAX_TCACHE_COUNT): Increase to UINT16_MAX.
	(tcache_put): Remove redundant assert.
	(tcache_get): Remove redundant asserts.
	(__libc_malloc): Check tcache count is not zero.
	* manual/tunables.texi (glibc.malloc.tcache_count): Update maximum.
 2019-05-17 18:16:20 +01:00
Wilco Dijkstra
5ad533e8e6 Fix tcache count maximum (BZ #24531) 
The tcache counts[] array is a char, which has a very small range and thus
may overflow.  When setting tcache_count tunable, there is no overflow check.
However the tunable must not be larger than the maximum value of the tcache
counts[] array, otherwise it can overflow when filling the tcache.

	[BZ #24531]
	* malloc/malloc.c (MAX_TCACHE_COUNT): New define.
	(do_set_tcache_count): Only update if count is small enough.
	* manual/tunables.texi (glibc.malloc.tcache_count): Document max value.
 2019-05-10 16:38:21 +01:00
Feng Xue
07c3d1ec03 aarch64: Add AmpereComputing emag to tunable cpu list 
Emag is a 64-bit CPU core released by AmpereComputing.

Add its name to cpu list, and corresponding macro as utilities for
later IFUNC dispatch.

    * manual/tunables.texi (Tunable glibc.cpu.name): Add emag.
    * sysdeps/unix/sysv/linux/aarch64/cpu-features.c (cpu_list):
    Add emag.
    * sysdeps/unix/sysv/linux/aarch64/cpu-features.h (IS_EMAG):
    New macro.
 2019-02-01 07:59:18 -05:00
Wilco Dijkstra
02f440c1ef [AArch64] Add ifunc support for Ares 
Add Ares to the midr_el0 list and support ifunc dispatch.  Since Ares
supports 2 128-bit loads/stores, use Neon registers for memcpy by
selecting __memcpy_falkor by default (we should rename this to
__memcpy_simd or similar).

	* manual/tunables.texi (glibc.cpu.name): Add ares tunable.
	* sysdeps/aarch64/multiarch/memcpy.c (__libc_memcpy): Use
	__memcpy_falkor for ares.
	* sysdeps/unix/sysv/linux/aarch64/cpu-features.h (IS_ARES):
	Add new define.
	* sysdeps/unix/sysv/linux/aarch64/cpu-features.c (cpu_list):
	Add ares cpu.
 2019-01-09 10:35:34 +00:00
Kemi Wang
6310e6be9b Mutex: Add pthread mutex tunables 
This patch does not have any functionality change, we only provide a spin
count tunes for pthread adaptive spin mutex. The tunable
glibc.pthread.mutex_spin_count tunes can be used by system administrator to
squeeze system performance according to different hardware capabilities and
workload characteristics.

The maximum value of spin count is limited to 32767 to avoid the overflow
of mutex->__data.__spins variable with the possible type of short in
pthread_mutex_lock ().

The default value of spin count is set to 100 with the reference to the
previous number of times of spinning via trylock. This value would be
architecture-specific and can be tuned with kinds of benchmarks to fit most
cases in future.

I would extend my appreciation sincerely to H.J.Lu for his help to refine
this patch series.

	* manual/tunables.texi (POSIX Thread Tunables): New node.
	* nptl/Makefile (libpthread-routines): Add pthread_mutex_conf.
	* nptl/nptl-init.c: Include pthread_mutex_conf.h
	(__pthread_initialize_minimal_internal) [HAVE_TUNABLES]: Call
	 __pthread_tunables_init.
	* nptl/pthreadP.h (MAX_ADAPTIVE_COUNT): Remove.
	(max_adaptive_count): Define.
	* nptl/pthread_mutex_conf.c: New file.
	* nptl/pthread_mutex_conf.h: New file.
	* sysdeps/generic/adaptive_spin_count.h: New file.
	* sysdeps/nptl/dl-tunables.list: New file.
	* nptl/pthread_mutex_lock.c (__pthread_mutex_lock): Use
	max_adaptive_count () not MAX_ADAPTIVE_COUNT.
	* nptl/pthread_mutex_timedlock.c (__pthrad_mutex_timedlock):
	Likewise.

Suggested-by: Andi Kleen <andi.kleen@intel.com>
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Signed-off-by: Kemi.wang <kemi.wang@intel.com>
 2018-12-01 08:19:20 -08:00
Siddhesh Poyarekar
dce452dc52 Rename the glibc.tune namespace to glibc.cpu 
The glibc.tune namespace is vaguely named since it is a 'tunable', so
give it a more specific name that describes what it refers to.  Rename
the tunable namespace to 'cpu' to more accurately reflect what it
encompasses.  Also rename glibc.tune.cpu to glibc.cpu.name since
glibc.cpu.cpu is weird.

	* NEWS: Mention the change.
	* elf/dl-tunables.list: Rename tune namespace to cpu.
	* sysdeps/powerpc/dl-tunables.list: Likewise.
	* sysdeps/x86/dl-tunables.list: Likewise.
	* sysdeps/aarch64/dl-tunables.list: Rename tune.cpu to
	cpu.name.
	* elf/dl-hwcaps.c (_dl_important_hwcaps): Adjust.
	* elf/dl-hwcaps.h (GET_HWCAP_MASK): Likewise.
	* manual/README.tunables: Likewise.
	* manual/tunables.texi: Likewise.
	* sysdeps/powerpc/cpu-features.c: Likewise.
	* sysdeps/unix/sysv/linux/aarch64/cpu-features.c
	(init_cpu_features): Likewise.
	* sysdeps/x86/cpu-features.c: Likewise.
	* sysdeps/x86/cpu-features.h: Likewise.
	* sysdeps/x86/cpu-tunables.c: Likewise.
	* sysdeps/x86_64/Makefile: Likewise.
	* sysdeps/x86/dl-cet.c: Likewise.

Reviewed-by: Carlos O'Donell <carlos@redhat.com>
 2018-08-02 23:49:19 +05:30
H.J. Lu
6d90776dff x86/CET: Document glibc.tune.x86_ibt and glibc.tune.x86_shstk 
* manual/tunables.texi: Document glibc.tune.x86_ibt and
	glibc.tune.x86_shstk.
 2018-07-18 11:35:03 -07:00
Tobias Klauser
28c3f14f2e manual: Fix spelling of "Auxiliary." 2018-01-23 11:40:44 -08:00
Adhemerval Zanella
c9cd7b0ce5 powerpc: POWER8 memcpy optimization for cached memory 
On POWER8, unaligned memory accesses to cached memory has little impact
on performance as opposed to its ancestors.

It is disabled by default and will only be available when the tunable
glibc.tune.cached_memopt is set to 1.

                 __memcpy_power8_cached      __memcpy_power7
============================================================
    max-size=4096:     33325.70 ( 12.65%)        38153.00
    max-size=8192:     32878.20 ( 11.17%)        37012.30
   max-size=16384:     33782.20 ( 11.61%)        38219.20
   max-size=32768:     33296.20 ( 11.30%)        37538.30
   max-size=65536:     33765.60 ( 10.53%)        37738.40

	* manual/tunables.texi (Hardware Capability Tunables): Document
	glibc.tune.cached_memopt.
	* sysdeps/powerpc/cpu-features.c: New file.
	* sysdeps/powerpc/cpu-features.h: New file.
	* sysdeps/powerpc/dl-procinfo.c [!IS_IN(ldconfig)]: Add
	_dl_powerpc_cpu_features.
	* sysdeps/powerpc/dl-tunables.list: New file.
	* sysdeps/powerpc/ldsodefs.h: Include cpu-features.h.
	* sysdeps/powerpc/powerpc32/power4/multiarch/init-arch.h
	(INIT_ARCH): Initialize use_aligned_memopt.
	* sysdeps/powerpc/powerpc64/dl-machine.h [defined(SHARED &&
	IS_IN(rtld))]: Restrict dl_platform_init availability and
	initialize CPU features used by tunables.
	* sysdeps/powerpc/powerpc64/multiarch/Makefile (sysdep_routines):
	Add memcpy-power8-cached.
	* sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c: Add
	__memcpy_power8_cached.
	* sysdeps/powerpc/powerpc64/multiarch/memcpy.c: Likewise.
	* sysdeps/powerpc/powerpc64/multiarch/memcpy-power8-cached.S:
	New file.

Reviewed-by: Rajalakshmi Srinivasaraghavan  <raji@linux.vnet.ibm.com>
 2017-12-11 17:39:42 -02:00
Rogerio Alves
07ed18d26a Add elision tunables 
This patch adds several new tunables to control the behavior of
elision on supported platforms[1].   Since elision now depends
on tunables, we should always *compile* with elision enabled,
and leave the code disabled, but available for runtime
selection.  This gives us *much* better compile-time testing of
the existing code to avoid bit-rot[2].

Tested on ppc, ppc64, ppc64le, s390x and x86_64.

[1] This part of the patch was initially proposed by
Paul Murphy but was "staled" because the framework have changed
since the patch was originally proposed:

https://patchwork.sourceware.org/patch/10342/

[2] This part of the patch was inititally proposed as a RFC by
Carlos O'Donnell.  Make sense to me integrate this on the patch:

https://sourceware.org/ml/libc-alpha/2017-05/msg00335.html

	* elf/dl-tunables.list: Add elision parameters.
	* manual/tunables.texi: Add entries about elision tunable.
	* sysdeps/unix/sysv/linux/powerpc/elision-conf.c:
	Add callback functions to dynamically enable/disable elision.
	Add multiple callbacks functions to set elision parameters.
	Deleted __libc_enable_secure check.
	* sysdeps/unix/sysv/linux/s390/elision-conf.c: Likewise.
	* sysdeps/unix/sysv/linux/x86/elision-conf.c: Likewise.
	* configure: Regenerated.
	* configure.ac: Option enable_lock_elision was deleted.
	* config.h.in: ENABLE_LOCK_ELISION flag was deleted.
	* config.make.in: Remove references to enable_lock_elision.
	* manual/install.texi: Elision configure option was removed.
	* INSTALL: Regenerated to remove enable_lock_elision.
	* nptl/Makefile:
	Disable elision so it can verify error case for destroying a mutex.
	* sysdeps/powerpc/nptl/elide.h:
	Cleanup ENABLE_LOCK_ELISION check.
	Deleted macros for the case when ENABLE_LOCK_ELISION was not defined.
	* sysdeps/s390/configure: Regenerated.
	* sysdeps/s390/configure.ac: Remove references to enable_lock_elision..
	* nptl/tst-mutex8.c:
	Deleted all #ifndef ENABLE_LOCK_ELISION from the test.
	* sysdeps/powerpc/powerpc32/sysdep.h:
	Deleted all ENABLE_LOCK_ELISION checks.
	* sysdeps/powerpc/powerpc64/sysdep.h: Likewise.
	* sysdeps/powerpc/sysdep.h: Likewise.
	* sysdeps/s390/nptl/bits/pthreadtypes-arch.h: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/force-elision.h: Likewise.
	* sysdeps/unix/sysv/linux/s390/elision-conf.h: Likewise.
	* sysdeps/unix/sysv/linux/s390/force-elision.h: Likewise.
	* sysdeps/unix/sysv/linux/s390/lowlevellock.h: Likewise.
	* sysdeps/unix/sysv/linux/s390/Makefile: Remove references to
	enable-lock-elision.

Reviewed-by: Tulio Magno Quites Machado Filho <tuliom@linux.vnet.ibm.com>
 2017-12-05 17:48:48 -02:00
Steve Ellcey
9c9ec58197 Add thunderx2t99 and thunderx2t99p1 CPU names to tunables list 
* manual/tunables.texi (glibc.tune.cpu): Add thunderx2t99 and
	thunderx2t99p1 to list of cpu names.
	* sysdeps/unix/sysv/linux/aarch64/cpu-features.c (cpu_list):
	Add thunderx2t99 and thunderx2t99p1 entries to cpu_list.
 2017-09-08 11:02:09 -07:00
Florian Weimer
ec2c1fcefb malloc: Abort on heap corruption, without a backtrace [BZ #21754] 
The stack trace printing caused deadlocks and has been itself been
targeted by code execution exploits.
 2017-08-30 16:39:41 +02:00
Siddhesh Poyarekar
36ada5f681 aarch64: Optimized memcpy for Qualcomm Falkor processor 
This is an optimized implementation of the memcpy routine that gives a
significant gain in performance for all sizes of copies on the
Qualcomm Falkor processor.  A detailed rationale of the implementation
is written in a comment in the patch.

This implementation improves time for copies up to 128 bytes by up to
15% and for larger copies by up to 35% in the glibc
microbenchmark. The memcpy-random benchmark sees improvements in all
sizes in the range of 13%-18%.

Here are the full numbers extracted from the glibc microbenchmark
using the commands:

../benchtests/scripts/compare_strings.py benchtests/bench-memcpy.out \
		../benchtests/scripts/benchout_strings.schema.json \
		-base=__memcpy_generic length align1 align2

../benchtests/scripts/compare_strings.py benchtests/bench-memcpy-large.out \
		../benchtests/scripts/benchout_strings.schema.json \
		-base=__memcpy_generic length align1 align2

../benchtests/scripts/compare_strings.py benchtests/bench-memcpy-random.out \
		../benchtests/scripts/benchout_strings.schema.json \
		-base=__memcpy_generic max-size

Function: memcpy
__memcpy_thunderx       __memcpy_falkor __memcpy_generic
Variant: default
================================================================================
length=1,align1=0,align2=0:     33.59 (-115.00%)        15.62 (0.00%)   15.62
length=1,align1=0,align2=0:     16.41 (-10.53%) 14.06 (5.26%)   14.84
length=1,align1=0,align2=0:     14.84 (0.00%)   14.84 (0.00%)   14.84
length=1,align1=0,align2=0:     15.62 (-5.26%)  14.06 (5.26%)   14.84
length=2,align1=0,align2=0:     15.62 (-5.26%)  14.06 (5.26%)   14.84
length=2,align1=1,align2=0:     15.62 (-5.26%)  14.06 (5.26%)   14.84
length=2,align1=0,align2=1:     14.84 (0.00%)   14.06 (5.26%)   14.84
length=2,align1=1,align2=1:     14.84 (-5.56%)  14.06 (0.00%)   14.06
length=4,align1=0,align2=0:     14.06 (0.00%)   14.06 (0.00%)   14.06
length=4,align1=2,align2=0:     14.06 (-5.88%)  14.06 (-5.88%)  13.28
length=4,align1=0,align2=2:     14.06 (0.00%)   14.06 (0.00%)   14.06
length=4,align1=2,align2=2:     14.06 (-5.88%)  14.06 (-5.88%)  13.28
length=8,align1=0,align2=0:     14.84 (-5.56%)  13.28 (5.56%)   14.06
length=8,align1=3,align2=0:     14.06 (0.00%)   13.28 (5.56%)   14.06
length=8,align1=0,align2=3:     13.28 (0.00%)   13.28 (0.00%)   13.28
length=8,align1=3,align2=3:     13.28 (-6.25%)  13.28 (-6.25%)  12.50
length=16,align1=0,align2=0:    13.28 (0.00%)   13.28 (0.00%)   13.28
length=16,align1=4,align2=0:    13.28 (0.00%)   12.50 (5.88%)   13.28
length=16,align1=0,align2=4:    13.28 (0.00%)   13.28 (0.00%)   13.28
length=16,align1=4,align2=4:    13.28 (-6.25%)  12.50 (0.00%)   12.50
length=32,align1=0,align2=0:    14.06 (0.00%)   12.50 (11.11%)  14.06
length=32,align1=5,align2=0:    13.28 (0.00%)   12.50 (5.88%)   13.28
length=32,align1=0,align2=5:    14.06 (-5.88%)  12.50 (5.88%)   13.28
length=32,align1=5,align2=5:    14.06 (-5.88%)  12.50 (5.88%)   13.28
length=64,align1=0,align2=0:    14.06 (-5.88%)  13.28 (0.00%)   13.28
length=64,align1=6,align2=0:    13.28 (0.00%)   13.28 (0.00%)   13.28
length=64,align1=0,align2=6:    14.06 (5.26%)   14.06 (5.26%)   14.84
length=64,align1=6,align2=6:    14.84 (-11.77%) 14.06 (-5.88%)  13.28
length=128,align1=0,align2=0:   17.19 (-4.76%)  14.84 (9.52%)   16.41
length=128,align1=7,align2=0:   16.41 (4.55%)   15.62 (9.09%)   17.19
length=128,align1=0,align2=7:   16.41 (0.00%)   14.06 (14.29%)  16.41
length=128,align1=7,align2=7:   16.41 (4.55%)   15.62 (9.09%)   17.19
length=256,align1=0,align2=0:   21.88 (-3.70%)  21.09 (0.00%)   21.09
length=256,align1=8,align2=0:   21.09 (-3.85%)  21.09 (-3.85%)  20.31
length=256,align1=0,align2=8:   20.31 (-4.00%)  20.31 (-4.00%)  19.53
length=256,align1=8,align2=8:   21.88 (-7.69%)  20.31 (0.00%)   20.31
length=512,align1=0,align2=0:   28.91 (-2.78%)  28.91 (-2.78%)  28.12
length=512,align1=9,align2=0:   30.47 (-2.63%)  30.47 (-2.63%)  29.69
length=512,align1=0,align2=9:   29.69 (0.00%)   29.69 (0.00%)   29.69
length=512,align1=9,align2=9:   28.12 (-2.86%)  28.12 (-2.86%)  27.34
length=1024,align1=0,align2=0:  44.53 (0.00%)   44.53 (0.00%)   44.53
length=1024,align1=10,align2=0:         50.00 (0.00%)   50.00 (0.00%)   50.00
length=1024,align1=0,align2=10:         49.22 (1.56%)   50.78 (-1.56%)  50.00
length=1024,align1=10,align2=10:        44.53 (-1.79%)  43.75 (0.00%)   43.75
length=2048,align1=0,align2=0:  77.34 (-1.02%)  76.56 (0.00%)   76.56
length=2048,align1=11,align2=0:         89.84 (0.00%)   89.84 (0.00%)   89.84
length=2048,align1=0,align2=11:         89.84 (0.00%)   89.84 (0.00%)   89.84
length=2048,align1=11,align2=11:        75.78 (0.00%)   75.78 (0.00%)   75.78
length=4096,align1=0,align2=0:  141.41 (-0.56%) 140.62 (0.00%)  140.62
length=4096,align1=12,align2=0:         171.09 (-0.46%) 170.31 (0.00%)  170.31
length=4096,align1=0,align2=12:         170.31 (0.00%)  170.31 (0.00%)  170.31
length=4096,align1=12,align2=12:        140.62 (0.00%)  140.62 (0.00%)  140.62
length=8192,align1=0,align2=0:  278.91 (-0.28%) 275.78 (0.84%)  278.12
length=8192,align1=13,align2=0:         338.28 (0.23%)  335.94 (0.92%)  339.06
length=8192,align1=0,align2=13:         338.28 (0.00%)  455.47 (-34.64%)        338.28
length=8192,align1=13,align2=13:        278.12 (-0.28%) 275.78 (0.56%)  277.34
length=16384,align1=0,align2=0:         535.94 (-0.15%) 531.25 (0.73%)  535.16
length=16384,align1=14,align2=0:        659.38 (0.12%)  659.38 (0.12%)  660.16
length=16384,align1=0,align2=14:        659.38 (0.00%)  657.03 (0.36%)  659.38
length=16384,align1=14,align2=14:       535.16 (0.44%)  532.81 (0.87%)  537.50
length=32768,align1=0,align2=0:         1260.94 (10.68%)        1121.88 (20.53%)        1411.72
length=32768,align1=15,align2=0:        1368.75 (10.02%)        1376.56 (9.50%) 1521.09
length=32768,align1=0,align2=15:        1333.59 (10.91%)        1373.44 (8.25%) 1496.88
length=32768,align1=15,align2=15:       1256.25 (13.96%)        1125.78 (22.90%)        1460.16
length=65536,align1=0,align2=0:         2853.91 (30.11%)        2589.06 (36.60%)        4083.59
length=65536,align1=16,align2=0:        2850.00 (30.14%)        2589.84 (36.52%)        4079.69
length=65536,align1=0,align2=16:        2853.12 (30.60%)        2589.84 (37.00%)        4110.94
length=65536,align1=16,align2=16:       2850.78 (30.07%)        2589.06 (36.49%)        4076.56
length=0,align1=0,align2=0:     15.62 (-5.26%)  16.41 (-10.53%) 14.84
length=0,align1=0,align2=0:     14.84 (-5.56%)  14.84 (-5.56%)  14.06
length=0,align1=0,align2=0:     14.84 (0.00%)   14.84 (0.00%)   14.84
length=0,align1=0,align2=0:     16.41 (-16.67%) 14.84 (-5.56%)  14.06
length=1,align1=0,align2=0:     15.62 (4.76%)   15.62 (4.76%)   16.41
length=1,align1=1,align2=0:     15.62 (0.00%)   14.84 (5.00%)   15.62
length=1,align1=0,align2=1:     14.84 (0.00%)   14.84 (0.00%)   14.84
length=1,align1=1,align2=1:     14.84 (0.00%)   14.06 (5.26%)   14.84
length=2,align1=0,align2=0:     14.84 (0.00%)   14.06 (5.26%)   14.84
length=2,align1=2,align2=0:     14.84 (0.00%)   14.06 (5.26%)   14.84
length=2,align1=0,align2=2:     14.84 (-5.56%)  14.06 (0.00%)   14.06
length=2,align1=2,align2=2:     14.84 (0.00%)   14.06 (5.26%)   14.84
length=3,align1=0,align2=0:     14.84 (0.00%)   14.84 (0.00%)   14.84
length=3,align1=3,align2=0:     14.84 (-5.56%)  14.06 (0.00%)   14.06
length=3,align1=0,align2=3:     15.62 (-11.11%) 14.06 (0.00%)   14.06
length=3,align1=3,align2=3:     14.84 (0.00%)   14.06 (5.26%)   14.84
length=4,align1=0,align2=0:     17.97 (-27.78%) 14.06 (0.00%)   14.06
length=4,align1=4,align2=0:     13.28 (5.56%)   14.06 (0.00%)   14.06
length=4,align1=0,align2=4:     14.06 (0.00%)   13.28 (5.56%)   14.06
length=4,align1=4,align2=4:     13.28 (5.56%)   13.28 (5.56%)   14.06
length=5,align1=0,align2=0:     13.28 (5.56%)   13.28 (5.56%)   14.06
length=5,align1=5,align2=0:     14.06 (0.00%)   14.06 (0.00%)   14.06
length=5,align1=0,align2=5:     14.06 (0.00%)   13.28 (5.56%)   14.06
length=5,align1=5,align2=5:     14.06 (-5.88%)  14.06 (-5.88%)  13.28
length=6,align1=0,align2=0:     14.06 (-5.88%)  14.06 (-5.88%)  13.28
length=6,align1=6,align2=0:     14.06 (0.00%)   14.06 (0.00%)   14.06
length=6,align1=0,align2=6:     14.06 (0.00%)   13.28 (5.56%)   14.06
length=6,align1=6,align2=6:     14.06 (0.00%)   13.28 (5.56%)   14.06
length=7,align1=0,align2=0:     14.84 (-11.77%) 14.06 (-5.88%)  13.28
length=7,align1=7,align2=0:     13.28 (0.00%)   14.06 (-5.88%)  13.28
length=7,align1=0,align2=7:     14.06 (0.00%)   14.06 (0.00%)   14.06
length=7,align1=7,align2=7:     14.06 (0.00%)   14.06 (0.00%)   14.06
length=8,align1=0,align2=0:     14.06 (-5.88%)  13.28 (0.00%)   13.28
length=8,align1=8,align2=0:     14.06 (0.00%)   13.28 (5.56%)   14.06
length=8,align1=0,align2=8:     13.28 (0.00%)   13.28 (0.00%)   13.28
length=8,align1=8,align2=8:     14.06 (-5.88%)  13.28 (0.00%)   13.28
length=9,align1=0,align2=0:     13.28 (0.00%)   13.28 (0.00%)   13.28
length=9,align1=9,align2=0:     13.28 (0.00%)   13.28 (0.00%)   13.28
length=9,align1=0,align2=9:     13.28 (0.00%)   14.06 (-5.88%)  13.28
length=9,align1=9,align2=9:     14.06 (-5.88%)  13.28 (0.00%)   13.28
length=10,align1=0,align2=0:    14.06 (0.00%)   13.28 (5.56%)   14.06
length=10,align1=10,align2=0:   14.06 (-5.88%)  14.06 (-5.88%)  13.28
length=10,align1=0,align2=10:   14.06 (-5.88%)  13.28 (0.00%)   13.28
length=10,align1=10,align2=10:  14.06 (0.00%)   13.28 (5.56%)   14.06
length=11,align1=0,align2=0:    14.06 (-5.88%)  13.28 (0.00%)   13.28
length=11,align1=11,align2=0:   14.06 (-5.88%)  13.28 (0.00%)   13.28
length=11,align1=0,align2=11:   13.28 (0.00%)   13.28 (0.00%)   13.28
length=11,align1=11,align2=11:  13.28 (0.00%)   13.28 (0.00%)   13.28
length=12,align1=0,align2=0:    14.06 (-5.88%)  13.28 (0.00%)   13.28
length=12,align1=12,align2=0:   14.06 (-5.88%)  13.28 (0.00%)   13.28
length=12,align1=0,align2=12:   14.06 (-5.88%)  13.28 (0.00%)   13.28
length=12,align1=12,align2=12:  14.06 (0.00%)   13.28 (5.56%)   14.06
length=13,align1=0,align2=0:    14.06 (-5.88%)  13.28 (0.00%)   13.28
length=13,align1=13,align2=0:   14.06 (-5.88%)  13.28 (0.00%)   13.28
length=13,align1=0,align2=13:   14.06 (-5.88%)  13.28 (0.00%)   13.28
length=13,align1=13,align2=13:  13.28 (0.00%)   13.28 (0.00%)   13.28
length=14,align1=0,align2=0:    13.28 (0.00%)   13.28 (0.00%)   13.28
length=14,align1=14,align2=0:   13.28 (5.56%)   13.28 (5.56%)   14.06
length=14,align1=0,align2=14:   14.06 (-5.88%)  13.28 (0.00%)   13.28
length=14,align1=14,align2=14:  14.06 (-5.88%)  13.28 (0.00%)   13.28
length=15,align1=0,align2=0:    14.06 (-5.88%)  13.28 (0.00%)   13.28
length=15,align1=15,align2=0:   14.06 (-5.88%)  14.06 (-5.88%)  13.28
length=15,align1=0,align2=15:   13.28 (0.00%)   13.28 (0.00%)   13.28
length=15,align1=15,align2=15:  13.28 (0.00%)   14.06 (-5.88%)  13.28
length=16,align1=0,align2=0:    14.06 (-5.88%)  13.28 (0.00%)   13.28
length=16,align1=16,align2=0:   13.28 (5.56%)   14.06 (0.00%)   14.06
length=16,align1=0,align2=16:   14.84 (-11.77%) 13.28 (0.00%)   13.28
length=16,align1=16,align2=16:  13.28 (-6.25%)  12.50 (0.00%)   12.50
length=17,align1=0,align2=0:    14.06 (-5.88%)  12.50 (5.88%)   13.28
length=17,align1=17,align2=0:   14.84 (-11.77%) 12.50 (5.88%)   13.28
length=17,align1=0,align2=17:   14.84 (-5.56%)  12.50 (11.11%)  14.06
length=17,align1=17,align2=17:  14.84 (-11.77%) 12.50 (5.88%)   13.28
length=18,align1=0,align2=0:    14.06 (0.00%)   12.50 (11.11%)  14.06
length=18,align1=18,align2=0:   13.28 (5.56%)   12.50 (11.11%)  14.06
length=18,align1=0,align2=18:   14.06 (-5.88%)  12.50 (5.88%)   13.28
length=18,align1=18,align2=18:  14.06 (0.00%)   12.50 (11.11%)  14.06
length=19,align1=0,align2=0:    14.06 (-5.88%)  13.28 (0.00%)   13.28
length=19,align1=19,align2=0:   14.06 (-5.88%)  13.28 (0.00%)   13.28
length=19,align1=0,align2=19:   14.84 (-5.56%)  12.50 (11.11%)  14.06
length=19,align1=19,align2=19:  14.06 (-5.88%)  12.50 (5.88%)   13.28
length=20,align1=0,align2=0:    14.84 (-11.77%) 12.50 (5.88%)   13.28
length=20,align1=20,align2=0:   14.06 (0.00%)   12.50 (11.11%)  14.06
length=20,align1=0,align2=20:   14.06 (-5.88%)  12.50 (5.88%)   13.28
length=20,align1=20,align2=20:  14.06 (0.00%)   13.28 (5.56%)   14.06
length=21,align1=0,align2=0:    14.84 (-5.56%)  12.50 (11.11%)  14.06
length=21,align1=21,align2=0:   14.06 (-5.88%)  13.28 (0.00%)   13.28
length=21,align1=0,align2=21:   14.84 (-11.77%) 12.50 (5.88%)   13.28
length=21,align1=21,align2=21:  13.28 (5.56%)   13.28 (5.56%)   14.06
length=22,align1=0,align2=0:    14.06 (-5.88%)  12.50 (5.88%)   13.28
length=22,align1=22,align2=0:   14.06 (-5.88%)  13.28 (0.00%)   13.28
length=22,align1=0,align2=22:   14.06 (0.00%)   12.50 (11.11%)  14.06
length=22,align1=22,align2=22:  14.06 (0.00%)   12.50 (11.11%)  14.06
length=23,align1=0,align2=0:    14.06 (-5.88%)  12.50 (5.88%)   13.28
length=23,align1=23,align2=0:   14.06 (-5.88%)  13.28 (0.00%)   13.28
length=23,align1=0,align2=23:   14.06 (-5.88%)  12.50 (5.88%)   13.28
length=23,align1=23,align2=23:  14.06 (-5.88%)  13.28 (0.00%)   13.28
length=24,align1=0,align2=0:    14.06 (-5.88%)  12.50 (5.88%)   13.28
length=24,align1=24,align2=0:   14.06 (0.00%)   13.28 (5.56%)   14.06
length=24,align1=0,align2=24:   14.84 (-11.77%) 12.50 (5.88%)   13.28
length=24,align1=24,align2=24:  14.06 (-5.88%)  13.28 (0.00%)   13.28
length=25,align1=0,align2=0:    14.06 (0.00%)   12.50 (11.11%)  14.06
length=25,align1=25,align2=0:   14.06 (0.00%)   13.28 (5.56%)   14.06
length=25,align1=0,align2=25:   14.06 (0.00%)   12.50 (11.11%)  14.06
length=25,align1=25,align2=25:  13.28 (0.00%)   13.28 (0.00%)   13.28
length=26,align1=0,align2=0:    14.06 (-5.88%)  12.50 (5.88%)   13.28
length=26,align1=26,align2=0:   14.06 (0.00%)   13.28 (5.56%)   14.06
length=26,align1=0,align2=26:   14.06 (-5.88%)  12.50 (5.88%)   13.28
length=26,align1=26,align2=26:  14.06 (0.00%)   13.28 (5.56%)   14.06
length=27,align1=0,align2=0:    14.06 (-5.88%)  12.50 (5.88%)   13.28
length=27,align1=27,align2=0:   14.06 (-5.88%)  12.50 (5.88%)   13.28
length=27,align1=0,align2=27:   14.06 (-5.88%)  12.50 (5.88%)   13.28
length=27,align1=27,align2=27:  14.06 (0.00%)   12.50 (11.11%)  14.06
length=28,align1=0,align2=0:    14.06 (-5.88%)  12.50 (5.88%)   13.28
length=28,align1=28,align2=0:   14.06 (0.00%)   12.50 (11.11%)  14.06
length=28,align1=0,align2=28:   14.06 (0.00%)   12.50 (11.11%)  14.06
length=28,align1=28,align2=28:  14.84 (-11.77%) 13.28 (0.00%)   13.28
length=29,align1=0,align2=0:    14.06 (-5.88%)  12.50 (5.88%)   13.28
length=29,align1=29,align2=0:   13.28 (0.00%)   12.50 (5.88%)   13.28
length=29,align1=0,align2=29:   14.06 (0.00%)   12.50 (11.11%)  14.06
length=29,align1=29,align2=29:  13.28 (5.56%)   12.50 (11.11%)  14.06
length=30,align1=0,align2=0:    14.06 (-5.88%)  12.50 (5.88%)   13.28
length=30,align1=30,align2=0:   13.28 (5.56%)   12.50 (11.11%)  14.06
length=30,align1=0,align2=30:   14.06 (-5.88%)  12.50 (5.88%)   13.28
length=30,align1=30,align2=30:  13.28 (0.00%)   12.50 (5.88%)   13.28
length=31,align1=0,align2=0:    13.28 (0.00%)   12.50 (5.88%)   13.28
length=31,align1=31,align2=0:   14.06 (0.00%)   12.50 (11.11%)  14.06
length=31,align1=0,align2=31:   13.28 (0.00%)   12.50 (5.88%)   13.28
length=31,align1=31,align2=31:  14.06 (0.00%)   12.50 (11.11%)  14.06
length=48,align1=0,align2=0:    14.06 (0.00%)   14.06 (0.00%)   14.06
length=48,align1=3,align2=0:    14.06 (0.00%)   14.06 (0.00%)   14.06
length=48,align1=0,align2=3:    14.06 (-5.88%)  14.06 (-5.88%)  13.28
length=48,align1=3,align2=3:    13.28 (5.56%)   14.06 (0.00%)   14.06
length=80,align1=0,align2=0:    15.62 (-11.11%) 14.84 (-5.56%)  14.06
length=80,align1=5,align2=0:    15.62 (-11.11%) 16.41 (-16.67%) 14.06
length=80,align1=0,align2=5:    14.06 (0.00%)   15.62 (-11.11%) 14.06
length=80,align1=5,align2=5:    15.62 (-5.26%)  17.19 (-15.79%) 14.84
length=96,align1=0,align2=0:    14.06 (0.00%)   14.84 (-5.56%)  14.06
length=96,align1=6,align2=0:    14.84 (-5.56%)  16.41 (-16.67%) 14.06
length=96,align1=0,align2=6:    14.06 (0.00%)   14.84 (-5.56%)  14.06
length=96,align1=6,align2=6:    14.84 (-5.56%)  17.19 (-22.22%) 14.06
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length=112,align1=0,align2=7:   16.41 (0.00%)   14.84 (9.52%)   16.41
length=112,align1=7,align2=7:   17.19 (0.00%)   17.19 (0.00%)   17.19
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length=144,align1=0,align2=9:   20.31 (-8.33%)  18.75 (0.00%)   18.75
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length=192,align1=0,align2=12:  18.75 (0.00%)   18.75 (0.00%)   18.75
length=192,align1=12,align2=12:         18.75 (0.00%)   17.97 (4.17%)   18.75
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length=208,align1=0,align2=13:  23.44 (-11.11%) 21.09 (0.00%)   21.09
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length=224,align1=0,align2=14:  21.09 (3.57%)   20.31 (7.14%)   21.88
length=224,align1=14,align2=14:         20.31 (0.00%)   19.53 (3.85%)   20.31
length=240,align1=0,align2=0:   20.31 (-4.00%)  19.53 (0.00%)   19.53
length=240,align1=15,align2=0:  22.66 (0.00%)   20.31 (10.34%)  22.66
length=240,align1=0,align2=15:  20.31 (-4.00%)  20.31 (-4.00%)  19.53
length=240,align1=15,align2=15:         21.88 (0.00%)   21.09 (3.57%)   21.88
length=272,align1=0,align2=0:   20.31 (0.00%)   28.12 (-38.46%) 20.31
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length=272,align1=0,align2=17:  25.78 (-10.00%) 28.12 (-20.00%) 23.44
length=272,align1=17,align2=17:         22.66 (-3.57%)  27.34 (-25.00%) 21.88
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length=288,align1=18,align2=0:  22.66 (0.00%)   27.34 (-20.69%) 22.66
length=288,align1=0,align2=18:  23.44 (-3.45%)  25.00 (-10.35%) 22.66
length=288,align1=18,align2=18:         22.66 (-3.57%)  21.88 (0.00%)   21.88
length=304,align1=0,align2=0:   21.88 (0.00%)   21.88 (0.00%)   21.88
length=304,align1=19,align2=0:  23.44 (-3.45%)  22.66 (0.00%)   22.66
length=304,align1=0,align2=19:  22.66 (0.00%)   22.66 (0.00%)   22.66
length=304,align1=19,align2=19:         22.66 (-3.57%)  21.88 (0.00%)   21.88
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length=320,align1=20,align2=0:  22.66 (0.00%)   22.66 (0.00%)   22.66
length=320,align1=0,align2=20:  22.66 (0.00%)   22.66 (0.00%)   22.66
length=320,align1=20,align2=20:         22.66 (-3.57%)  21.88 (0.00%)   21.88
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length=336,align1=21,align2=0:  22.66 (0.00%)   25.00 (-10.35%) 22.66
length=336,align1=0,align2=21:  25.78 (0.00%)   25.00 (3.03%)   25.78
length=336,align1=21,align2=21:         25.00 (0.00%)   23.44 (6.25%)   25.00
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length=352,align1=22,align2=0:  25.00 (0.00%)   25.00 (0.00%)   25.00
length=352,align1=0,align2=22:  25.00 (-3.23%)  25.00 (-3.23%)  24.22
length=352,align1=22,align2=22:         25.00 (-3.23%)  24.22 (0.00%)   24.22
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length=368,align1=23,align2=0:  25.00 (0.00%)   24.22 (3.12%)   25.00
length=368,align1=0,align2=23:  25.00 (-3.23%)  25.00 (-3.23%)  24.22
length=368,align1=23,align2=23:         25.00 (-6.67%)  23.44 (0.00%)   23.44
length=384,align1=0,align2=0:   24.22 (0.00%)   24.22 (0.00%)   24.22
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length=384,align1=0,align2=24:  25.00 (0.00%)   25.78 (-3.12%)  25.00
length=384,align1=24,align2=24:         24.22 (-3.33%)  23.44 (0.00%)   23.44
length=400,align1=0,align2=0:   25.00 (-3.23%)  26.56 (-9.68%)  24.22
length=400,align1=25,align2=0:  25.78 (-3.12%)  27.34 (-9.38%)  25.00
length=400,align1=0,align2=25:  27.34 (0.00%)   27.34 (0.00%)   27.34
length=400,align1=25,align2=25:         26.56 (0.00%)   25.78 (2.94%)   26.56
length=416,align1=0,align2=0:   26.56 (-3.03%)  25.78 (0.00%)   25.78
length=416,align1=26,align2=0:  28.12 (-2.86%)  27.34 (0.00%)   27.34
length=416,align1=0,align2=26:  27.34 (-2.94%)  28.12 (-5.88%)  26.56
length=416,align1=26,align2=26:         25.78 (0.00%)   26.56 (-3.03%)  25.78
length=432,align1=0,align2=0:   27.34 (-2.94%)  25.78 (2.94%)   26.56
length=432,align1=27,align2=0:  28.12 (-2.86%)  27.34 (0.00%)   27.34
length=432,align1=0,align2=27:  27.34 (0.00%)   28.12 (-2.86%)  27.34
length=432,align1=27,align2=27:         25.78 (0.00%)   25.78 (0.00%)   25.78
length=448,align1=0,align2=0:   26.56 (-3.03%)  25.78 (0.00%)   25.78
length=448,align1=28,align2=0:  27.34 (0.00%)   27.34 (0.00%)   27.34
length=448,align1=0,align2=28:  27.34 (0.00%)   28.12 (-2.86%)  27.34
length=448,align1=28,align2=28:         25.78 (0.00%)   25.78 (0.00%)   25.78
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length=464,align1=0,align2=29:  30.47 (0.00%)   30.47 (0.00%)   30.47
length=464,align1=29,align2=29:         28.12 (0.00%)   27.34 (2.78%)   28.12
length=480,align1=0,align2=0:   29.69 (-5.56%)  28.12 (0.00%)   28.12
length=480,align1=30,align2=0:  31.25 (-2.56%)  29.69 (2.56%)   30.47
length=480,align1=0,align2=30:  29.69 (0.00%)   30.47 (-2.63%)  29.69
length=480,align1=30,align2=30:         28.12 (0.00%)   28.12 (0.00%)   28.12
length=496,align1=0,align2=0:   28.12 (0.00%)   27.34 (2.78%)   28.12
length=496,align1=31,align2=0:  30.47 (-2.63%)  29.69 (0.00%)   29.69
length=496,align1=0,align2=31:  29.69 (0.00%)   30.47 (-2.63%)  29.69
length=496,align1=31,align2=31:         28.12 (-2.86%)  28.12 (-2.86%)  27.34
length=1024,align1=0,align2=0:  44.53 (0.00%)   44.53 (0.00%)   44.53
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length=1024,align1=0,align2=32:         44.53 (-1.79%)  43.75 (0.00%)   43.75
length=1024,align1=32,align2=32:        43.75 (1.75%)   43.75 (1.75%)   44.53
length=1056,align1=0,align2=0:  46.88 (-1.69%)  46.88 (-1.69%)  46.09
length=1056,align1=33,align2=0:         53.12 (0.00%)   52.34 (1.47%)   53.12
length=1056,align1=0,align2=33:         52.34 (0.00%)   53.12 (-1.49%)  52.34
length=1056,align1=33,align2=33:        46.09 (0.00%)   46.88 (-1.69%)  46.09
length=1088,align1=0,align2=0:  46.88 (-1.69%)  46.09 (0.00%)   46.09
length=1088,align1=34,align2=0:         52.34 (0.00%)   52.34 (0.00%)   52.34
length=1088,align1=0,align2=34:         53.12 (-3.03%)  53.12 (-3.03%)  51.56
length=1088,align1=34,align2=34:        46.09 (0.00%)   46.88 (-1.69%)  46.09
length=1120,align1=0,align2=0:  49.22 (-1.61%)  48.44 (0.00%)   48.44
length=1120,align1=35,align2=0:         54.69 (1.41%)   55.47 (0.00%)   55.47
length=1120,align1=0,align2=35:         57.03 (0.00%)   55.47 (2.74%)   57.03
length=1120,align1=35,align2=35:        48.44 (0.00%)   49.22 (-1.61%)  48.44
length=1152,align1=0,align2=0:  47.66 (1.61%)   48.44 (0.00%)   48.44
length=1152,align1=36,align2=0:         55.47 (-1.43%)  55.47 (-1.43%)  54.69
length=1152,align1=0,align2=36:         58.59 (-1.35%)  55.47 (4.05%)   57.81
length=1152,align1=36,align2=36:        48.44 (0.00%)   49.22 (-1.61%)  48.44
length=1184,align1=0,align2=0:  53.12 (-3.03%)  50.78 (1.52%)   51.56
length=1184,align1=37,align2=0:         61.72 (-2.60%)  57.03 (5.19%)   60.16
length=1184,align1=0,align2=37:         62.50 (-1.27%)  57.03 (7.60%)   61.72
length=1184,align1=37,align2=37:        53.12 (-1.49%)  50.78 (2.99%)   52.34
length=1216,align1=0,align2=0:  53.91 (-4.55%)  50.78 (1.52%)   51.56
length=1216,align1=38,align2=0:         60.94 (0.00%)   57.03 (6.41%)   60.94
length=1216,align1=0,align2=38:         60.16 (0.00%)   57.81 (3.90%)   60.16
length=1216,align1=38,align2=38:        52.34 (-1.52%)  50.00 (3.03%)   51.56
length=1248,align1=0,align2=0:  54.69 (-2.94%)  53.12 (0.00%)   53.12
length=1248,align1=39,align2=0:         64.06 (-1.23%)  60.16 (4.94%)   63.28
length=1248,align1=0,align2=39:         60.94 (-2.63%)  60.16 (-1.32%)  59.38
length=1248,align1=39,align2=39:        53.12 (0.00%)   52.34 (1.47%)   53.12
length=1280,align1=0,align2=0:  52.34 (-1.52%)  52.34 (-1.52%)  51.56
length=1280,align1=40,align2=0:         61.72 (3.66%)   59.38 (7.32%)   64.06
length=1280,align1=0,align2=40:         60.94 (-2.63%)  60.16 (-1.32%)  59.38
length=1280,align1=40,align2=40:        52.34 (-1.52%)  52.34 (-1.52%)  51.56
length=1312,align1=0,align2=0:  54.69 (-1.45%)  55.47 (-2.90%)  53.91
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length=1312,align1=0,align2=41:         62.50 (0.00%)   62.50 (0.00%)   62.50
length=1312,align1=41,align2=41:        53.91 (0.00%)   54.69 (-1.45%)  53.91
length=1344,align1=0,align2=0:  54.69 (0.00%)   54.69 (0.00%)   54.69
length=1344,align1=42,align2=0:         62.50 (0.00%)   62.50 (0.00%)   62.50
length=1344,align1=0,align2=42:         62.50 (-1.27%)  62.50 (-1.27%)  61.72
length=1344,align1=42,align2=42:        53.91 (0.00%)   53.91 (0.00%)   53.91
length=1376,align1=0,align2=0:  65.62 (-16.67%) 68.75 (-22.22%) 56.25
length=1376,align1=43,align2=0:         71.88 (-9.52%)  73.44 (-11.90%) 65.62
length=1376,align1=0,align2=43:         72.66 (-12.05%) 74.22 (-14.46%) 64.84
length=1376,align1=43,align2=43:        64.06 (-13.89%) 67.97 (-20.83%) 56.25
length=1408,align1=0,align2=0:  57.03 (-1.39%)  68.75 (-22.22%) 56.25
length=1408,align1=44,align2=0:         65.62 (-1.20%)  73.44 (-13.25%) 64.84
length=1408,align1=0,align2=44:         64.84 (0.00%)   74.22 (-14.46%) 64.84
length=1408,align1=44,align2=44:        56.25 (-1.41%)  68.75 (-23.94%) 55.47
length=1440,align1=0,align2=0:  67.97 (-14.47%) 64.84 (-9.21%)  59.38
length=1440,align1=45,align2=0:         74.22 (-10.47%) 68.75 (-2.33%)  67.19
length=1440,align1=0,align2=45:         72.66 (-6.90%)  69.53 (-2.30%)  67.97
length=1440,align1=45,align2=45:        65.62 (-13.51%) 58.59 (-1.35%)  57.81
length=1472,align1=0,align2=0:  66.41 (-14.86%) 58.59 (-1.35%)  57.81
length=1472,align1=46,align2=0:         73.44 (-9.30%)  67.19 (0.00%)   67.19
length=1472,align1=0,align2=46:         70.31 (-4.65%)  67.97 (-1.16%)  67.19
length=1472,align1=46,align2=46:        57.81 (0.00%)   58.59 (-1.35%)  57.81
length=1504,align1=0,align2=0:  60.94 (0.00%)   60.94 (0.00%)   60.94
length=1504,align1=47,align2=0:         71.09 (-1.11%)  70.31 (0.00%)   70.31
length=1504,align1=0,align2=47:         70.31 (-1.12%)  70.31 (-1.12%)  69.53
length=1504,align1=47,align2=47:        60.94 (-1.30%)  60.16 (0.00%)   60.16
length=1536,align1=0,align2=0:  62.50 (-3.90%)  60.16 (0.00%)   60.16
length=1536,align1=48,align2=0:         60.94 (-1.30%)  60.16 (0.00%)   60.16
length=1536,align1=0,align2=48:         61.72 (-3.95%)  60.16 (-1.32%)  59.38
length=1536,align1=48,align2=48:        60.94 (-1.30%)  60.16 (0.00%)   60.16
length=1568,align1=0,align2=0:  80.47 (-27.16%) 63.28 (0.00%)   63.28
length=1568,align1=49,align2=0:         86.72 (-18.09%) 72.66 (1.06%)   73.44
length=1568,align1=0,align2=49:         74.22 (-3.26%)  74.22 (-3.26%)  71.88
length=1568,align1=49,align2=49:        62.50 (0.00%)   61.72 (1.25%)   62.50
length=1600,align1=0,align2=0:  62.50 (-1.27%)  62.50 (-1.27%)  61.72
length=1600,align1=50,align2=0:         73.44 (0.00%)   71.88 (2.13%)   73.44
length=1600,align1=0,align2=50:         72.66 (0.00%)   73.44 (-1.08%)  72.66
length=1600,align1=50,align2=50:        62.50 (-1.27%)  62.50 (-1.27%)  61.72
length=1632,align1=0,align2=0:  64.84 (0.00%)   64.84 (0.00%)   64.84
length=1632,align1=51,align2=0:         75.78 (0.00%)   75.00 (1.03%)   75.78
length=1632,align1=0,align2=51:         78.91 (0.00%)   75.78 (3.96%)   78.91
length=1632,align1=51,align2=51:        64.84 (-2.47%)  64.84 (-2.47%)  63.28
length=1664,align1=0,align2=0:  64.84 (-1.22%)  64.84 (-1.22%)  64.06
length=1664,align1=52,align2=0:         75.78 (0.00%)   75.00 (1.03%)   75.78
length=1664,align1=0,align2=52:         80.47 (-0.98%)  75.78 (4.90%)   79.69
length=1664,align1=52,align2=52:        64.06 (-1.23%)  65.62 (-3.70%)  63.28
length=1696,align1=0,align2=0:  69.53 (-3.49%)  72.66 (-8.14%)  67.19
length=1696,align1=53,align2=0:         80.47 (-0.98%)  82.03 (-2.94%)  79.69
length=1696,align1=0,align2=53:         80.47 (0.96%)   82.03 (-0.96%)  81.25
length=1696,align1=53,align2=53:        68.75 (-2.33%)  72.66 (-8.14%)  67.19
length=1728,align1=0,align2=0:  67.97 (0.00%)   72.66 (-6.90%)  67.97
length=1728,align1=54,align2=0:         80.47 (-0.98%)  82.81 (-3.92%)  79.69
length=1728,align1=0,align2=54:         78.91 (-1.00%)  82.03 (-5.00%)  78.12
length=1728,align1=54,align2=54:        68.75 (0.00%)   72.66 (-5.68%)  68.75
length=1760,align1=0,align2=0:  77.34 (-12.50%) 68.75 (0.00%)   68.75
length=1760,align1=55,align2=0:         91.41 (-8.33%)  79.69 (5.56%)   84.38
length=1760,align1=0,align2=55:         88.28 (-10.78%) 80.47 (-0.98%)  79.69
length=1760,align1=55,align2=55:        77.34 (-11.24%) 68.75 (1.12%)   69.53
length=1792,align1=0,align2=0:  78.12 (-14.94%) 68.75 (-1.15%)  67.97
length=1792,align1=56,align2=0:         88.28 (-4.63%)  79.69 (5.56%)   84.38
length=1792,align1=0,align2=56:         88.28 (-9.71%)  80.47 (0.00%)   80.47
length=1792,align1=56,align2=56:        77.34 (-11.24%) 68.75 (1.12%)   69.53
length=1824,align1=0,align2=0:  72.66 (7.92%)   70.31 (10.89%)  78.91
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length=1824,align1=0,align2=57:         82.03 (3.67%)   82.81 (2.75%)   85.16
length=1824,align1=57,align2=57:        70.31 (-1.12%)  70.31 (-1.12%)  69.53
length=1856,align1=0,align2=0:  70.31 (-1.12%)  70.31 (-1.12%)  69.53
length=1856,align1=58,align2=0:         83.59 (-0.94%)  82.03 (0.94%)   82.81
length=1856,align1=0,align2=58:         178.12 (-115.09%)       82.81 (0.00%)   82.81
length=1856,align1=58,align2=58:        70.31 (-1.12%)  70.31 (-1.12%)  69.53
length=1888,align1=0,align2=0:  73.44 (-1.08%)  78.91 (-8.60%)  72.66
length=1888,align1=59,align2=0:         85.94 (0.00%)   89.84 (-4.55%)  85.94
length=1888,align1=0,align2=59:         84.38 (0.00%)   89.06 (-5.56%)  84.38
length=1888,align1=59,align2=59:        72.66 (-1.09%)  78.12 (-8.70%)  71.88
length=1920,align1=0,align2=0:  72.66 (-1.09%)  78.12 (-8.70%)  71.88
length=1920,align1=60,align2=0:         85.94 (0.00%)   89.84 (-4.55%)  85.94
length=1920,align1=0,align2=60:         85.16 (0.00%)   89.06 (-4.59%)  85.16
length=1920,align1=60,align2=60:        72.66 (-1.09%)  78.91 (-9.78%)  71.88
length=1952,align1=0,align2=0:  75.00 (-1.05%)  75.00 (-1.05%)  74.22
length=1952,align1=61,align2=0:         88.28 (0.00%)   87.50 (0.88%)   88.28
length=1952,align1=0,align2=61:         87.50 (0.00%)   88.28 (-0.89%)  87.50
length=1952,align1=61,align2=61:        74.22 (0.00%)   74.22 (0.00%)   74.22
length=1984,align1=0,align2=0:  75.00 (-1.05%)  73.44 (1.05%)   74.22
length=1984,align1=62,align2=0:         89.06 (-0.89%)  87.50 (0.88%)   88.28
length=1984,align1=0,align2=62:         87.50 (0.00%)   88.28 (-0.89%)  87.50
length=1984,align1=62,align2=62:        74.22 (0.00%)   74.22 (0.00%)   74.22
length=2016,align1=0,align2=0:  77.34 (-1.02%)  76.56 (0.00%)   76.56
length=2016,align1=63,align2=0:         91.41 (-0.86%)  90.62 (0.00%)   90.62
length=2016,align1=0,align2=63:         89.84 (0.00%)   90.62 (-0.87%)  89.84
length=2016,align1=63,align2=63:        77.34 (-1.02%)  76.56 (0.00%)   76.56
length=4096,align1=0,align2=0:  141.41 (-0.56%) 146.88 (-4.44%) 140.62

Function: memcpy
__memcpy_thunderx       __memcpy_falkor __memcpy_generic
Variant: large
================================================================================
length=65543,align1=0,align2=0:         4018.75 (3.09%) 2634.38 (36.47%)        4146.88
length=65551,align1=0,align2=3:         4425.00 (-6.47%)        3134.38 (24.59%)        4156.25
length=65567,align1=3,align2=0:         2909.38 (29.95%)        3134.38 (24.53%)        4153.12
length=65599,align1=3,align2=5:         4415.62 (-6.16%)        3134.38 (24.64%)        4159.38
length=131079,align1=0,align2=0:        5765.62 (30.38%)        5240.62 (36.72%)        8281.25
length=131087,align1=0,align2=3:        8831.25 (-6.56%)        6271.88 (24.32%)        8287.50
length=131103,align1=3,align2=0:        5793.75 (29.05%)        6268.75 (23.23%)        8165.62
length=131135,align1=3,align2=5:        5806.25 (29.97%)        6259.38 (24.50%)        8290.62
length=262151,align1=0,align2=0:        11850.00 (28.91%)       10762.50 (35.43%)       16668.80
length=262159,align1=0,align2=3:        12043.80 (27.72%)       12700.00 (23.78%)       16662.50
length=262175,align1=3,align2=0:        12046.90 (27.90%)       12687.50 (24.07%)       16709.40
length=262207,align1=3,align2=5:        11984.40 (28.08%)       12678.10 (23.91%)       16662.50
length=524295,align1=0,align2=0:        24825.00 (25.00%)       24268.80 (27.34%)       33400.00
length=524303,align1=0,align2=3:        35731.20 (-6.53%)       25678.10 (23.44%)       33540.60
length=524319,align1=3,align2=0:        25893.80 (22.71%)       25725.00 (23.22%)       33503.10
length=524351,align1=3,align2=5:        25887.50 (22.86%)       25690.60 (23.45%)       33559.40
length=1048583,align1=0,align2=0:       50621.90 (0.30%)        50600.00 (0.34%)        50771.90
length=1048591,align1=0,align2=3:       53206.20 (0.54%)        51081.20 (4.51%)        53493.80
length=1048607,align1=3,align2=0:       53221.90 (0.32%)        51975.00 (2.66%)        53393.80
length=1048639,align1=3,align2=5:       53240.60 (0.36%)        51953.10 (2.77%)        53431.20
length=2097159,align1=0,align2=0:       103744.00 (-2.00%)      102447.00 (-1.00%)      102425.00
length=2097167,align1=0,align2=3:       108588.00 (-1.00%)      105159.00 (2.00%)       107606.00
length=2097183,align1=3,align2=0:       107678.00 (0.00%)       105250.00 (2.00%)       108125.00
length=2097215,align1=3,align2=5:       107906.00 (1.00%)       105841.00 (3.00%)       109475.00
length=4194311,align1=0,align2=0:       202994.00 (0.00%)       202500.00 (1.00%)       204809.00
length=4194319,align1=0,align2=3:       213350.00 (0.00%)       205997.00 (3.00%)       213384.00
length=4194335,align1=3,align2=0:       212653.00 (0.00%)       206444.00 (3.00%)       212900.00
length=4194367,align1=3,align2=5:       213044.00 (0.00%)       206084.00 (3.00%)       213847.00
length=8388615,align1=0,align2=0:       401294.00 (0.00%)       401231.00 (0.00%)       401944.00
length=8388623,align1=0,align2=3:       480872.00 (-14.00%)     406444.00 (3.00%)       422900.00
length=8388639,align1=3,align2=0:       422147.00 (0.00%)       407750.00 (3.00%)       422803.00
length=8388671,align1=3,align2=5:       442003.00 (-5.00%)      407125.00 (3.00%)       423509.00
length=16777223,align1=0,align2=0:      799809.00 (0.00%)       800000.00 (0.00%)       801756.00
length=16777231,align1=0,align2=3:      841184.00 (0.00%)       808525.00 (4.00%)       843775.00
length=16777247,align1=3,align2=0:      841166.00 (0.00%)       810147.00 (3.00%)       843147.00
length=16777279,align1=3,align2=5:      972569.00 (-16.00%)     808588.00 (4.00%)       843731.00
length=33554439,align1=0,align2=0:      1842240.00 (-0.01%)     1863590.00 (-1.17%)     1841990.00
length=33554447,align1=0,align2=3:      2103470.00 (-2.74%)     1919460.00 (6.25%)      2047440.00
length=33554463,align1=3,align2=0:      2075690.00 (-1.07%)     1930040.00 (6.02%)      2053720.00
length=33554495,align1=3,align2=5:      2110590.00 (-2.82%)     1924440.00 (6.25%)      2052650.00

Function: memcpy
__memcpy_thunderx       __memcpy_falkor __memcpy_generic
Variant: random
================================================================================
max-size=4096:  44061.90 (5.85%)        38568.20 (17.59%)       46799.90
max-size=8192:  42790.90 (5.27%)        38158.90 (15.52%)       45171.50
max-size=16384:         44912.10 (2.25%)        38710.40 (15.75%)       45945.00
max-size=32768:         43577.90 (1.23%)        37975.10 (13.93%)       44120.00
max-size=65536:         44375.50 (1.04%)        38474.20 (14.20%)       44840.60

	* manual/tunables.texi (Tunable glibc.tune.cpu): Add falkor.
	* sysdeps/aarch64/multiarch/Makefile (sysdep_routines): Add
	memcpy_falkor.
	* sysdeps/aarch64/multiarch/ifunc-impl-list.c (MAX_IFUNC):
	Bump.
	(__libc_ifunc_impl_list): Add __memcpy_falkor.
	* sysdeps/aarch64/multiarch/memcpy.c: Likewise.
	* sysdeps/aarch64/multiarch/memcpy_falkor.S: New file.
	* sysdeps/unix/sysv/linux/aarch64/cpu-features.c (cpu_list):
	Add falkor.
	* sysdeps/unix/sysv/linux/aarch64/cpu-features.h (IS_FALKOR):
	New macro.
 2017-08-09 06:32:17 +05:30
DJ Delorie
be8aa923a7 * manual/tunables.texi: Add missing @end deftp. 2017-07-06 19:54:13 -04:00
DJ Delorie
d5c3fafc43 Add per-thread cache to malloc 
* config.make.in: Enable experimental malloc option.
* configure.ac: Likewise.
* configure: Regenerate.
* manual/install.texi: Document it.
* INSTALL: Regenerate.
* malloc/Makefile: Likewise.
* malloc/malloc.c: Add per-thread cache (tcache).
(tcache_put): New.
(tcache_get): New.
(tcache_thread_freeres): New.
(tcache_init): New.
(__libc_malloc): Use cached chunks if available.
(__libc_free): Initialize tcache if needed.
(__libc_realloc): Likewise.
(__libc_calloc): Likewise.
(_int_malloc): Prefill tcache when appropriate.
(_int_free): Likewise.
(do_set_tcache_max): New.
(do_set_tcache_count): New.
(do_set_tcache_unsorted_limit): New.
* manual/probes.texi: Document new probes.
* malloc/arena.c: Add new tcache tunables.
* elf/dl-tunables.list: Likewise.
* manual/tunables.texi: Document them.
* NEWS: Mention the per-thread cache.
 2017-07-06 13:37:30 -04:00
Siddhesh Poyarekar
28cfa3a48e tunables, aarch64: New tunable to override cpu 
Add a new tunable (glibc.tune.cpu) to override CPU identification on
aarch64.  This is useful in two cases: one where it is desirable to
pretend to be another CPU for purposes of testing or because routines
written for that CPU are beneficial for specific workloads and second
where the underlying kernel does not support emulation of MRS to get
the MIDR of the CPU.

	* elf/dl-tunables.h (tunable_is_name): Move from...
	* elf/dl-tunables.c (is_name): ... here.
	(parse_tunables, __tunables_init): Adjust.
	* manual/tunables.texi: Document glibc.tune.cpu.
	* sysdeps/aarch64/dl-tunables.list: New file.
	* sysdeps/unix/sysv/linux/aarch64/cpu-features.c (struct
	cpu_list): New type.
	(cpu_list): New list of CPU names and their MIDR.
	(get_midr_from_mcpu): New function.
	(init_cpu_features): Override MIDR if necessary.
 2017-06-30 22:58:39 +05:30
H.J. Lu
03feacb562 x86: Rename glibc.tune.ifunc to glibc.tune.hwcaps 
Rename glibc.tune.ifunc to glibc.tune.hwcaps and move it to
sysdeps/x86/dl-tunables.list since it is x86 specicifc.  Also
change type of data_cache_size, data_cache_size and
non_temporal_threshold to unsigned long int to match size_t.
Remove usage DEFAULT_STRLEN from cpu-tunables.c.

	* elf/dl-tunables.list (glibc.tune.ifunc): Removed.
	* sysdeps/x86/dl-tunables.list (glibc.tune.hwcaps): New.
	Remove security_level on all fields.
	* manual/tunables.texi: Replace ifunc with hwcaps.
	* sysdeps/x86/cpu-features.c (TUNABLE_CALLBACK (set_ifunc)):
	Renamed to ..
	(TUNABLE_CALLBACK (set_hwcaps)): This.
	(init_cpu_features): Updated.
	* sysdeps/x86/cpu-features.h (cpu_features): Change type of
	data_cache_size, data_cache_size and non_temporal_threshold to
	unsigned long int.
	* sysdeps/x86/cpu-tunables.c (DEFAULT_STRLEN): Removed.
	(TUNABLE_CALLBACK (set_ifunc)): Renamed to ...
	(TUNABLE_CALLBACK (set_hwcaps)): This.  Update comments.  Don't
	use DEFAULT_STRLEN.
 2017-06-21 10:21:37 -07:00
H.J. Lu
905947c304 tunables: Add IFUNC selection and cache sizes 
The current IFUNC selection is based on microbenchmarks in glibc.  It
should give the best performance for most workloads.  But other choices
may have better performance for a particular workload or on the hardware
which wasn't available at the selection was made.  The environment
variable, GLIBC_TUNABLES=glibc.tune.ifunc=-xxx,yyy,-zzz...., can be used
to enable CPU/ARCH feature yyy, disable CPU/ARCH feature yyy and zzz,
where the feature name is case-sensitive and has to match the ones in
cpu-features.h.  It can be used by glibc developers to override the
IFUNC selection to tune for a new processor or improve performance for
a particular workload.  It isn't intended for normal end users.

NOTE: the IFUNC selection may change over time.  Please check all
multiarch implementations when experimenting.

Also, GLIBC_TUNABLES=glibc.tune.x86_non_temporal_threshold=NUMBER is
provided to set threshold to use non temporal store to NUMBER,
GLIBC_TUNABLES=glibc.tune.x86_data_cache_size=NUMBER to set data cache
size, GLIBC_TUNABLES=glibc.tune.x86_shared_cache_size=NUMBER to set
shared cache size.

	* elf/dl-tunables.list (tune): Add ifunc,
	x86_non_temporal_threshold,
	x86_data_cache_size and x86_shared_cache_size.
	* manual/tunables.texi: Document glibc.tune.ifunc,
	glibc.tune.x86_data_cache_size, glibc.tune.x86_shared_cache_size
	and glibc.tune.x86_non_temporal_threshold.
	* sysdeps/unix/sysv/linux/x86/dl-sysdep.c: New file.
	* sysdeps/x86/cpu-tunables.c: Likewise.
	* sysdeps/x86/cacheinfo.c
	(init_cacheinfo): Check and get data cache size, shared cache
	size and non temporal threshold from cpu_features.
	* sysdeps/x86/cpu-features.c [HAVE_TUNABLES] (TUNABLE_NAMESPACE):
	New.
	[HAVE_TUNABLES] Include <unistd.h>.
	[HAVE_TUNABLES] Include <elf/dl-tunables.h>.
	[HAVE_TUNABLES] (TUNABLE_CALLBACK (set_ifunc)): Likewise.
	[HAVE_TUNABLES] (init_cpu_features): Use TUNABLE_GET to set
	IFUNC selection, data cache size, shared cache size and non
	temporal threshold.
	* sysdeps/x86/cpu-features.h (cpu_features): Add data_cache_size,
	shared_cache_size and non_temporal_threshold.
 2017-06-20 08:37:28 -07:00
Siddhesh Poyarekar
ea9b0ecbf0 tunables: Add LD_HWCAP_MASK to tunables 
Add LD_HWCAP_MASK to tunables in preparation of it being removed from
rtld.c.  This allows us to read LD_HWCAP_MASK much earlier so that it
can influence IFUNC resolution in aarch64.

This patch does not actually do anything other than read the
LD_HWCAP_MASK variable and add the tunables way to set the
LD_HWCAP_MASK, i.e. via the glibc.tune.hwcap_mask tunable.  In a
follow-up patch, the _dl_hwcap_mask will be replaced with
glibc.tune.hwcap_mask to complete the transition.

	* elf/dl-tunables.list: Add glibc.tune.hwcap_mask.
	* scripts/gen-tunables.awk: Include dl-procinfo.h.
	* manual/tunables.texi: Document glibc.tune.hwcap_mask.
 2017-06-07 11:11:37 +05:30
Siddhesh Poyarekar
b31b4d6ae5 User manual documentation for tunables 
Create a new node for tunables documentation and add notes for the
malloc tunables.

	* manual/tunables.texi: New chapter.
	* manual/Makefile (chapters): Add it.
	* manual/probes.texi (@node): Point to the Tunables chapter.
 2016-12-31 23:49:24 +05:30