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* sysdeps/unix/sysv/linux/ia64/sysconf.c: New file.
	* sysdeps/unix/sysv/linux/ia64/Dist: Add has_cpuclock.c.
	* sysdeps/unix/sysv/linux/ia64/clock_getcpuclockid.c: Move actual
	testing code to...
	* sysdeps/unix/sysv/linux/ia64/has_cpuclock.c: ...here.  New file.
	* sysdeps/unix/sysv/linux/i386/sysconf.c: Add dynamic check for
	_SC_CPUTIME and _SC_THREAD_CPUTIME.
This commit is contained in:
Ulrich Drepper 2004-10-04 19:28:07 +00:00
parent 3078cba2f7
commit 94d824f920
10 changed files with 155 additions and 44 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
ChangeLog
View File

@ -1,5 +1,13 @@
2004-10-04 Ulrich Drepper <drepper@redhat.com>
* sysdeps/unix/sysv/linux/ia64/sysconf.c: New file.
* sysdeps/unix/sysv/linux/ia64/Dist: Add has_cpuclock.c.
* sysdeps/unix/sysv/linux/ia64/clock_getcpuclockid.c: Move actual
testing code to...
* sysdeps/unix/sysv/linux/ia64/has_cpuclock.c: ...here. New file.
* sysdeps/unix/sysv/linux/i386/sysconf.c: Add dynamic check for
_SC_CPUTIME and _SC_THREAD_CPUTIME.
* nscd/connections.c (start_threads): Use sysconf in case
_POSIX_CLOCK_SELECTION or _POSIX_MONOTONIC_CLOCK is not greater zero.

4
linuxthreads/ChangeLog
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@ -1,5 +1,9 @@
2004-10-04 Ulrich Drepper <drepper@redhat.com>
* sysdeps/unix/sysv/linux/i386/bits/posix_opt.h: Set _POSIX_CPUTIME
and _POSIX_THREAD_CPUTIME to zero.
* sysdeps/unix/sysv/linux/ia64/bits/posix_opt.h: Likewise.
* sysdeps/unix/sysv/linux/bits/posix_opt.h: Define
_POSIX_THREAD_PROCESS_SHARED and _POSIX_CLOCK_SELECTION as -1.
* sysdeps/unix/sysv/linux/i386/bits/posix_opt.h: Likewise.

4
linuxthreads/sysdeps/unix/sysv/linux/i386/bits/posix_opt.h
View File

@ -106,10 +106,10 @@
#define _POSIX_SHARED_MEMORY_OBJECTS 200112L
/* CPU-time clocks supported. */
#define _POSIX_CPUTIME 200112L
#define _POSIX_CPUTIME 0
/* We support the clock also in threads. */
#define _POSIX_THREAD_CPUTIME 200112L
#define _POSIX_THREAD_CPUTIME 0
/* GNU libc provides regular expression handling. */
#define _POSIX_REGEXP 1

4
linuxthreads/sysdeps/unix/sysv/linux/ia64/bits/posix_opt.h
View File

@ -106,10 +106,10 @@
#define _POSIX_SHARED_MEMORY_OBJECTS 200112L
/* CPU-time clocks supported. */
#define _POSIX_CPUTIME 200112L
#define _POSIX_CPUTIME 0
/* We support the clock also in threads. */
#define _POSIX_THREAD_CPUTIME 200112L
#define _POSIX_THREAD_CPUTIME 0
/* GNU libc provides regular expression handling. */
#define _POSIX_REGEXP 1

11
nscd/connections.c
View File

@ -1459,16 +1459,15 @@ start_threads (void)
&& defined _POSIX_MONOTONIC_CLOCK && _POSIX_MONOTONIC_CLOCK >= 0
/* Determine whether the monotonous clock is available. */
struct timespec dummy;
if (
# if _POSIX_MONOTONIC_CLOCK == 0
sysconf (_SC_MONOTONIC_CLOCK) > 0 &&
if (sysconf (_SC_MONOTONIC_CLOCK) > 0)
# endif
# if _POSIX_CLOCK_SELECTION == 0
sysconf (_SC_CLOCK_SELECTION) > 0 &&
if (sysconf (_SC_CLOCK_SELECTION) > 0)
# endif
clock_getres (CLOCK_MONOTONIC, &dummy) == 0
&& pthread_condattr_setclock (&condattr, CLOCK_MONOTONIC) == 0)
timeout_clock = CLOCK_MONOTONIC;
if (clock_getres (CLOCK_MONOTONIC, &dummy) == 0
&& pthread_condattr_setclock (&condattr, CLOCK_MONOTONIC) == 0)
timeout_clock = CLOCK_MONOTONIC;
#endif
pthread_cond_init (&readylist_cond, &condattr);

40
sysdeps/unix/sysv/linux/i386/sysconf.c
View File

@ -319,16 +319,9 @@ handle_amd (int name)
}
/* Get the value of the system variable NAME. */
long int
__sysconf (int name)
static int
i386_i486_test (void)
{
/* We only handle the cache information here (for now). */
if (name < _SC_LEVEL1_ICACHE_SIZE || name > _SC_LEVEL4_CACHE_LINESIZE)
return linux_sysconf (name);
/* Recognize i386 and compatible. These don't have any cache on
board. */
int eflags;
int ac;
asm volatile ("pushfl;\n\t"
@ -343,6 +336,35 @@ __sysconf (int name)
"pushl %0;\n\t"
"popfl"
: "=r" (eflags), "=r" (ac));
return ac;
}
/* Get the value of the system variable NAME. */
long int
__sysconf (int name)
{
if (name == _SC_CPUTIME || name == _SC_THREAD_CPUTIME)
{
/* Check dynamically. */
int ac = i386_i486_test ();
/* Only i386 and i486 have no TSC. */
// XXX We can add here test for machines which cannot support a
// XXX usabel TSC.
return ac == 0 || (ac & (1 << 21)) == 0 ? -1 : 200112L;
}
/* All the remainder, except the cache information, is handled in
the generic code. */
if (name < _SC_LEVEL1_ICACHE_SIZE || name > _SC_LEVEL4_CACHE_LINESIZE)
return linux_sysconf (name);
/* Recognize i386 and compatible. These don't have any cache on
board. */
int ac = i386_i486_test ();
if (ac == 0)
/* This is an i386. */
// XXX Is this true for all brands?

1
sysdeps/unix/sysv/linux/ia64/Dist
View File

@ -2,6 +2,7 @@ clone.S
clone2.S
dl-brk.S
dl-static.c
has_cpuclock.c
ioperm.c
ldd-rewrite.sed
__start_context.S

30
sysdeps/unix/sysv/linux/ia64/clock_getcpuclockid.c
View File

@ -1,4 +1,4 @@
/* Copyright (C) 2000, 2001, 2003 Free Software Foundation, Inc.
/* Copyright (C) 2000, 2001, 2003, 2004 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@ -24,6 +24,9 @@
#include <fcntl.h>
#include "has_cpuclock.c"
int
clock_getcpuclockid (pid_t pid, clockid_t *clock_id)
{
@ -31,30 +34,7 @@ clock_getcpuclockid (pid_t pid, clockid_t *clock_id)
if (pid != 0 && pid != getpid ())
return EPERM;
static int itc_usable;
int retval = ENOENT;
if (__builtin_expect (itc_usable == 0, 0))
{
int newval = 1;
int fd = open ("/proc/sal/itc_drift", O_RDONLY);
if (__builtin_expect (fd != -1, 1))
{
char buf[16];
/* We expect the file to contain a single digit followed by
a newline. If the format changes we better not rely on
the file content. */
if (read (fd, buf, sizeof buf) != 2 || buf[0] != '0'
|| buf[1] != '\n')
newval = -1;
close (fd);
}
itc_usable = newval;
}
if (itc_usable > 0)
if (has_cpuclock () > 0)
{
/* Store the number. */
*clock_id = CLOCK_PROCESS_CPUTIME_ID;

52
sysdeps/unix/sysv/linux/ia64/has_cpuclock.c Normal file
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@ -0,0 +1,52 @@
/* Copyright (C) 2000, 2001, 2003, 2004 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <errno.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/stat.h>
#include <sys/types.h>
static int itc_usable;
static int
has_cpuclock (void)
{
if (__builtin_expect (itc_usable == 0, 0))
{
int newval = 1;
int fd = open ("/proc/sal/itc_drift", O_RDONLY);
if (__builtin_expect (fd != -1, 1))
{
char buf[16];
/* We expect the file to contain a single digit followed by
a newline. If the format changes we better not rely on
the file content. */
if (read (fd, buf, sizeof buf) != 2 || buf[0] != '0'
|| buf[1] != '\n')
newval = -1;
close (fd);
}
itc_usable = newval;
}
return itc_usable;
}

45
sysdeps/unix/sysv/linux/ia64/sysconf.c Normal file
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@ -0,0 +1,45 @@
/* Get file-specific information about a file. Linux version.
Copyright (C) 2003, 2004 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <assert.h>
#include <stdbool.h>
#include <stdlib.h>
#include <unistd.h>
#include "has_cpuclock.c"
static long int linux_sysconf (int name);
/* Get the value of the system variable NAME. */
long int
__sysconf (int name)
{
if (name == _SC_CPUTIME || name == SC_THREAD_CPUTIME)
return has_cpuclock () ? 200112L : -1;
/* Everything else is handled by the more general code. */
return linux_sysconf (name);
}
/* Now the generic Linux version. */
#undef __sysconf
#define __sysconf static linux_sysconf
#include "../sysconf.c"