* [PATCH] Don't assume all future x86-64's will have usable TSC
@ 2004-10-05 8:42 Jakub Jelinek
0 siblings, 0 replies; only message in thread
From: Jakub Jelinek @ 2004-10-05 8:42 UTC (permalink / raw)
To: Ulrich Drepper; +Cc: Glibc hackers
Hi!
2004-10-05 Jakub Jelinek <jakub@redhat.com>
* sysdeps/unix/sysv/linux/x86_64/sysconf.c (__sysconf): Return 200112L
for _SC_CPUTIME or _SC_THREAD_CPUTIME.
nptl/
* sysdeps/unix/sysv/linux/x86_64/bits/posix_opt.h (_POSIX_CPUTIME,
_POSIX_THREAD_CPUTIME): Define to 0.
linuxthreads/
* sysdeps/unix/sysv/linux/x86_64/bits/posix_opt.h (_POSIX_CPUTIME,
_POSIX_THREAD_CPUTIME): Define to 0.
--- libc/sysdeps/unix/sysv/linux/x86_64/sysconf.c.jj 2004-03-15 09:13:21.000000000 +0100
+++ libc/sysdeps/unix/sysv/linux/x86_64/sysconf.c 2004-10-05 10:30:17.772272728 +0200
@@ -279,6 +279,12 @@ handle_amd (int name)
long int
__sysconf (int name)
{
+ if (name == _SC_CPUTIME || name == _SC_THREAD_CPUTIME)
+ {
+ /* XXX Test whether TSC is usable. */
+ return 200112L;
+ }
+
/* We only handle the cache information here (for now). */
if (name < _SC_LEVEL1_ICACHE_SIZE || name > _SC_LEVEL4_CACHE_LINESIZE)
return linux_sysconf (name);
--- libc/nptl/sysdeps/unix/sysv/linux/x86_64/bits/posix_opt.h.jj 2004-04-13 10:42:53.000000000 +0200
+++ libc/nptl/sysdeps/unix/sysv/linux/x86_64/bits/posix_opt.h 2004-10-05 10:30:48.001872870 +0200
@@ -103,10 +103,10 @@
#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
--- libc/linuxthreads/sysdeps/unix/sysv/linux/x86_64/bits/posix_opt.h.jj 2004-10-05 09:04:43.000000000 +0200
+++ libc/linuxthreads/sysdeps/unix/sysv/linux/x86_64/bits/posix_opt.h 2004-10-05 10:31:37.919956531 +0200
@@ -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
Jakub
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2004-10-05 8:42 [PATCH] Don't assume all future x86-64's will have usable TSC Jakub Jelinek
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