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glibc/sysdeps/x86_64/multiarch
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H.J. Lu 4cb334c4d6 x86: Use AVX2 memcpy/memset on Skylake server [BZ #21396] 
On Skylake server, AVX512 load/store instructions in memcpy/memset may
lead to lower CPU turbo frequency in certain situations.  Use of AVX2
in memcpy/memset has been observed to have improved overall performance
in many workloads due to the higher frequency.

Since AVX512ER is unique to Xeon Phi, this patch sets Prefer_No_AVX512
if AVX512ER isn't available so that AVX2 versions of memcpy/memset are
used on Skylake server.

	[BZ #21396]
	* sysdeps/x86/cpu-features.c (init_cpu_features): Set
	Prefer_No_AVX512 if AVX512ER isn't available.
	* sysdeps/x86/cpu-features.h (bit_arch_Prefer_No_AVX512): New.
	(index_arch_Prefer_No_AVX512): Likewise.
	* sysdeps/x86_64/multiarch/memcpy.S (__new_memcpy): Don't use
	AVX512 version if Prefer_No_AVX512 is set.
	* sysdeps/x86_64/multiarch/memcpy_chk.S (__memcpy_chk):
	Likewise.
	* sysdeps/x86_64/multiarch/memmove.S (__libc_memmove): Likewise.
	* sysdeps/x86_64/multiarch/memmove_chk.S (__memmove_chk):
	Likewise.
	* sysdeps/x86_64/multiarch/mempcpy.S (__mempcpy): Likewise.
	* sysdeps/x86_64/multiarch/mempcpy_chk.S (__mempcpy_chk):
	Likewise.
	* sysdeps/x86_64/multiarch/memset.S (memset): Likewise.
	* sysdeps/x86_64/multiarch/memset_chk.S (__memset_chk):
	Likewise.
2017-04-18 14:01:45 -07:00
..
bcopy.S Use IFUNC memmove/memset in x86-64 bcopy/bzero 2012-10-11 13:58:16 -07:00
ifunc-impl-list.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
Makefile X86-64: Remove previous default/SSE2/AVX2 memcpy/memmove 2016-06-08 13:58:08 -07:00
memcmp-sse4.S Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
memcmp-ssse3.S Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
memcmp.S Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
memcpy_chk.S x86: Use AVX2 memcpy/memset on Skylake server [BZ #21396] 2017-04-18 14:01:45 -07:00
memcpy-ssse3-back.S Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
memcpy-ssse3.S Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
memcpy.S x86: Use AVX2 memcpy/memset on Skylake server [BZ #21396] 2017-04-18 14:01:45 -07:00
memmove_chk.S x86: Use AVX2 memcpy/memset on Skylake server [BZ #21396] 2017-04-18 14:01:45 -07:00
memmove-avx512-no-vzeroupper.S Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
memmove-avx512-unaligned-erms.S Require binutils 2.24 to build x86-64 glibc [BZ #20139] 2016-07-01 06:03:05 -07:00
memmove-avx-unaligned-erms.S X86-64: Use non-temporal store in memcpy on large data 2016-04-12 08:10:47 -07:00
memmove-ssse3-back.S Improve 64bit memcpy/memmove for Atom, Core 2 and Core i7 2010-06-30 08:26:11 -07:00
memmove-ssse3.S Improve 64bit memcpy/memmove for Atom, Core 2 and Core i7 2010-06-30 08:26:11 -07:00
memmove-vec-unaligned-erms.S Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
memmove.S x86: Use AVX2 memcpy/memset on Skylake server [BZ #21396] 2017-04-18 14:01:45 -07:00
mempcpy_chk.S x86: Use AVX2 memcpy/memset on Skylake server [BZ #21396] 2017-04-18 14:01:45 -07:00
mempcpy.S x86: Use AVX2 memcpy/memset on Skylake server [BZ #21396] 2017-04-18 14:01:45 -07:00
memset_chk.S x86: Use AVX2 memcpy/memset on Skylake server [BZ #21396] 2017-04-18 14:01:45 -07:00
memset-avx2-unaligned-erms.S Don't put SSE2/AVX/AVX512 memmove/memset in ld.so 2016-04-03 14:35:38 -07:00
memset-avx512-no-vzeroupper.S Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
memset-avx512-unaligned-erms.S Require binutils 2.24 to build x86-64 glibc [BZ #20139] 2016-07-01 06:03:05 -07:00
memset-vec-unaligned-erms.S Add VZEROUPPER to memset-vec-unaligned-erms.S [BZ #21081] 2017-01-30 10:59:31 -08:00
memset.S x86: Use AVX2 memcpy/memset on Skylake server [BZ #21396] 2017-04-18 14:01:45 -07:00
sched_cpucount.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
stpcpy-sse2-unaligned.S Improved st{r,p}{,n}cpy for SSE2 and SSSE3 on x86-64 2011-06-24 15:14:22 -04:00
stpcpy-ssse3.S Improved st{r,p}{,n}cpy for SSE2 and SSSE3 on x86-64 2011-06-24 15:14:22 -04:00
stpcpy.S Add x86-64 __libc_ifunc_impl_list 2012-10-11 16:41:12 -07:00
stpncpy-c.c SSSE3 strcpy/stpcpy for x86-64 2009-07-02 03:39:03 -07:00
stpncpy-sse2-unaligned.S Improved st{r,p}{,n}cpy for SSE2 and SSSE3 on x86-64 2011-06-24 15:14:22 -04:00
stpncpy-ssse3.S Improved st{r,p}{,n}cpy for SSE2 and SSSE3 on x86-64 2011-06-24 15:14:22 -04:00
stpncpy.S Add x86-64 __libc_ifunc_impl_list 2012-10-11 16:41:12 -07:00
strcasecmp_l-ssse3.S Fix x86-64 build without multiarch. 2010-08-14 14:56:32 -07:00
strcasecmp_l.S Add x86-64 __libc_ifunc_impl_list 2012-10-11 16:41:12 -07:00
strcat-sse2-unaligned.S Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
strcat-ssse3.S Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
strcat.S Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
strchr-sse2-no-bsf.S Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
strchr.S Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
strcmp-sse2-unaligned.S Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
strcmp-sse42.S Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
strcmp-ssse3.S Remove NOT_IN_libc 2014-11-24 15:03:45 +05:30
strcmp.S Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
strcpy-sse2-unaligned.S Fix x86 strncat optimized implementation for large sizes 2017-01-03 14:24:53 -02:00
strcpy-ssse3.S Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
strcpy.S Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
strcspn-c.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
strcspn.S Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
strncase_l-ssse3.S Add optimized strncasecmp versions for x86-64. 2010-08-14 22:04:01 -07:00
strncase_l.S Add x86-64 __libc_ifunc_impl_list 2012-10-11 16:41:12 -07:00
strncat-c.c Improve 64 bit strcat functions with SSE2/SSSE3 2011-07-19 17:11:54 -04:00
strncat-sse2-unaligned.S Improve 64 bit strcat functions with SSE2/SSSE3 2011-07-19 17:11:54 -04:00
strncat-ssse3.S Improve 64 bit strcat functions with SSE2/SSSE3 2011-07-19 17:11:54 -04:00
strncat.S Add x86-64 __libc_ifunc_impl_list 2012-10-11 16:41:12 -07:00
strncmp-ssse3.S Don't define x86-64 __strncmp_ssse3 in libc.a 2012-09-27 07:43:03 -07:00
strncmp.S Add x86-64 __libc_ifunc_impl_list 2012-10-11 16:41:12 -07:00
strncpy-c.c SSSE3 strcpy/stpcpy for x86-64 2009-07-02 03:39:03 -07:00
strncpy-sse2-unaligned.S Improved st{r,p}{,n}cpy for SSE2 and SSSE3 on x86-64 2011-06-24 15:14:22 -04:00
strncpy-ssse3.S Improved st{r,p}{,n}cpy for SSE2 and SSSE3 on x86-64 2011-06-24 15:14:22 -04:00
strncpy.S Add x86-64 __libc_ifunc_impl_list 2012-10-11 16:41:12 -07:00
strpbrk-c.c Don't define __strpbrk_sse42 in static library 2010-03-24 12:16:24 -07:00
strpbrk.S Add x86-64 __libc_ifunc_impl_list 2012-10-11 16:41:12 -07:00
strspn-c.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
strspn.S Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
strstr-sse2-unaligned.S Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
strstr.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
test-multiarch.c Revert header inclusion changes that break math/ testing on x86_64. 2017-02-17 17:08:17 +00:00
varshift.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
varshift.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
wcscpy-c.c Remove NOT_IN_libc 2014-11-24 15:03:45 +05:30
wcscpy-ssse3.S Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
wcscpy.S Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
wmemcmp-c.c Remove NOT_IN_libc 2014-11-24 15:03:45 +05:30
wmemcmp-sse4.S Optimized memcmp and wmemcmp for x86-64 and x86-32 2011-10-15 11:10:08 -04:00
wmemcmp-ssse3.S Optimized memcmp and wmemcmp for x86-64 and x86-32 2011-10-15 11:10:08 -04:00
wmemcmp.S Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00