Update.

* sysdeps/ia64/Makefile [subdir=csu] (sysdep_routines): Add hp-timing.
	* sysdeps/ia64/Versions: Add _dl_cpuclock_offset for ld in 2.2.3.
	* sysdeps/ia64/hp-timing.c: New file.
	* sysdeps/ia64/hp-timing.h: New file.
	* sysdeps/unix/sysv/linux/ia64/bits/time.h: Add definitions for
	CLOCK_PROCESS_CPUTIME_ID and CLOCK_THREAD_CPUTIME_ID.

	* sysdeps/generic/clock_getcpuclockid.c: Make function generic, test
	using #ifdef whether the clock is available.
	* sysdeps/unix/i386/clock_getcpuclockid.c: Not needed anymore.

	* sysdeps/generic/dl-sysdep.c: Initialize _dl_cpuclock_offset to move
	it into data section.

ChangeLog

@@ -1,5 +1,19 @@
 2001-04-23  Ulrich Drepper  <drepper@redhat.com>
 
+	* sysdeps/ia64/Makefile [subdir=csu] (sysdep_routines): Add hp-timing.
+	* sysdeps/ia64/Versions: Add _dl_cpuclock_offset for ld in 2.2.3.
+	* sysdeps/ia64/hp-timing.c: New file.
+	* sysdeps/ia64/hp-timing.h: New file.
+	* sysdeps/unix/sysv/linux/ia64/bits/time.h: Add definitions for
+	CLOCK_PROCESS_CPUTIME_ID and CLOCK_THREAD_CPUTIME_ID.
+
+	* sysdeps/generic/clock_getcpuclockid.c: Make function generic, test
+	using #ifdef whether the clock is available.
+	* sysdeps/unix/i386/clock_getcpuclockid.c: Not needed anymore.
+
+	* sysdeps/generic/dl-sysdep.c: Initialize _dl_cpuclock_offset to move
+	it into data section.
+
 	* sysdeps/unix/i386/i586/clock_getres.c: Removed.
 	* sysdeps/unix/i386/i586/clock_gettime.c: Removed.
 	* sysdeps/unix/i386/i586/clock_nanosleep.c: Removed.

linuxthreads/ChangeLog

@@ -1,5 +1,7 @@
 2001-04-23  Ulrich Drepper  <drepper@redhat.com>
 
+	* sysdeps/ia64/Versions: New file.
+
 	* sysdeps/unix/sysv/linux/ia64/pt-initfini.c (_init): We don't
 	have to call __gmon_start__ in the libpthread DSO.
 	* sysdeps/pthread/pt-initfini.c (_init): Likewise.

linuxthreads/sysdeps/ia64/Versions

@@ -0,0 +1,5 @@
+libpthread {
+  GLIBC_2.2.3 {
+    __pthread_clock_gettime; __pthread_clock_settime;
+  }
+}

linuxthreads/sysdeps/pthread/getcpuclockid.c

@@ -1,4 +1,4 @@
-/* Copyright (C) 2000 Free Software Foundation, Inc.
+/* Copyright (C) 2000, 2001 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
@@ -19,10 +19,22 @@
 #include <errno.h>
 #include <pthread.h>
 #include <sys/time.h>
+#include <internals.h>
 
 int
-pthread_getcpuclockid (pthread_t pthread_id, clockid_t *clock_id)
+pthread_getcpuclockid (pthread_t thread_id, clockid_t *clock_id)
 {
+  /* We don't allow any process ID but our own.  */
+  if (thread_handle (thread_id)->h_descr != thread_self ())
+    return EPERM;
+
+#ifdef CLOCK_THREAD_CPUTIME_ID
+  /* Store the number.  */
+  *clock_id = CLOCK_THREAD_CPUTIME_ID;
+
+  return 0;
+#else
   /* We don't have a timer for that.  */
   return ENOENT;
+#endif
 }

linuxthreads/sysdeps/unix/sysv/linux/i386/getcpuclockid.c

@@ -1,37 +0,0 @@
-/* Copyright (C) 2000 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 Library General Public License as
-   published by the Free Software Foundation; either version 2 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
-   Library General Public License for more details.
-
-   You should have received a copy of the GNU Library General Public
-   License along with the GNU C Library; see the file COPYING.LIB.  If not,
-   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
-   Boston, MA 02111-1307, USA.  */
-
-#include <errno.h>
-#include <pthread.h>
-#include <unistd.h>
-#include <sys/time.h>
-
-#include <internals.h>
-
-int
-pthread_getcpuclockid (pthread_t thread_id, clockid_t *clock_id)
-{
-  /* We don't allow any process ID but our own.  */
-  if (thread_handle (thread_id)->h_descr != thread_self ())
-    return EPERM;
-
-  /* Store the number.  */
-  *clock_id = CLOCK_THREAD_CPUTIME_ID;
-
-  return 0;
-}

sysdeps/generic/clock_getcpuclockid.c

@@ -22,6 +22,17 @@
 int
 clock_getcpuclockid (pid_t pid, clockid_t *clock_id)
 {
+  /* We don't allow any process ID but our own.  */
+  if (pid != 0 && pid != getpid ())
+    return EPERM;
+
+#ifdef CLOCK_PROCESS_CPUTIME_ID
+  /* Store the number.  */
+  *clock_id = CLOCK_PROCESS_CPUTIME_ID;
+
+  return 0;
+#else
   /* We don't have a timer for that.  */
   return ENOENT;
+#endif
 }

sysdeps/generic/dl-sysdep.c

@@ -62,7 +62,7 @@ void *__libc_stack_end;
 static ElfW(auxv_t) *_dl_auxv;
 unsigned long int _dl_hwcap_mask = HWCAP_IMPORTANT;
 #if HP_TIMING_AVAIL
-hp_timing_t _dl_cpuclock_offset;
+hp_timing_t _dl_cpuclock_offset = 0;
 #endif
 
 #ifndef DL_FIND_ARG_COMPONENTS

sysdeps/ia64/Makefile

@@ -7,6 +7,7 @@ endif
 
 ifeq ($(subdir), csu)
 CPPFLAGS-start.S = -D__ASSEMBLY__
+sysdep_routines += hp-timing
 endif
 
 ifeq ($(subdir),elf)

sysdeps/ia64/Versions

@@ -4,4 +4,7 @@ ld {
     _dl_symbol_address; _dl_unmap; _dl_lookup_address;
     _dl_function_address;
   }
+  GLIBC_2.2.3 {
+    _dl_cpuclock_offset;
+  }
 }

sysdeps/ia64/hp-timing.c

@@ -1,5 +1,7 @@
-/* Copyright (C) 2000, 2001 Free Software Foundation, Inc.
+/* Support for high precision, low overhead timing functions.  IA-64 version.
+   Copyright (C) 2001 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@cygnus.com>, 2001.
 
    The GNU C Library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Library General Public License as
@@ -16,19 +18,7 @@
    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
    Boston, MA 02111-1307, USA.  */
 
-#include <errno.h>
+#include <hp-timing.h>
-#include <time.h>
-#include <unistd.h>
 
-int
+/* We have to define the variable for the overhead.  */
-clock_getcpuclockid (pid_t pid, clockid_t *clock_id)
+hp_timing_t __libc_hp_timing_overhead;
-{
-  /* We don't allow any process ID but our own.  */
-  if (pid != 0 && pid != getpid ())
-    return EPERM;
-
-  /* Store the number.  */
-  *clock_id = CLOCK_PROCESS_CPUTIME_ID;
-
-  return 0;
-}

sysdeps/ia64/hp-timing.h

@@ -0,0 +1,155 @@
+/* High precision, low overhead timing functions.  IA-64 version.
+   Copyright (C) 2001 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@cygnus.com>, 2001.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#ifndef _HP_TIMING_H
+#define _HP_TIMING_H	1
+
+#include <string.h>
+#include <sys/param.h>
+#include <stdio-common/_itoa.h>
+#include <ia64intrin.h>
+
+/* The macros defined here use the timestamp counter in IA-64.  They
+   provide a very accurate way to measure the time with very little
+   overhead.  The time values themself have no real meaning, only
+   differences are interesting.
+
+   The list of macros we need includes the following:
+
+   - HP_TIMING_AVAIL: test for availability.
+
+   - HP_TIMING_INLINE: this macro is non-zero if the functionality is not
+     implemented using function calls but instead uses some inlined code
+     which might simply consist of a few assembler instructions.  We have to
+     know this since we might want to use the macros here in places where we
+     cannot make function calls.
+
+   - hp_timing_t: This is the type for variables used to store the time
+     values.
+
+   - HP_TIMING_ZERO: clear `hp_timing_t' object.
+
+   - HP_TIMING_NOW: place timestamp for current time in variable given as
+     parameter.
+
+   - HP_TIMING_DIFF_INIT: do whatever is necessary to be able to use the
+     HP_TIMING_DIFF macro.
+
+   - HP_TIMING_DIFF: compute difference between two times and store it
+     in a third.  Source and destination might overlap.
+
+   - HP_TIMING_ACCUM: add time difference to another variable.  This might
+     be a bit more complicated to implement for some platforms as the
+     operation should be thread-safe and 64bit arithmetic on 32bit platforms
+     is not.
+
+   - HP_TIMING_ACCUM_NT: this is the variant for situations where we know
+     there are no threads involved.
+
+   - HP_TIMING_PRINT: write decimal representation of the timing value into
+     the given string.  This operation need not be inline even though
+     HP_TIMING_INLINE is specified.
+
+*/
+
+/* We always assume having the timestamp register.  */
+#define HP_TIMING_AVAIL		(1)
+
+/* We indeed have inlined functions.  */
+#define HP_TIMING_INLINE	(1)
+
+/* We use 64bit values for the times.  */
+typedef unsigned long int hp_timing_t;
+
+/* Internal variable used to store the overhead of the measurement
+   opcodes.  */
+extern hp_timing_t __libc_hp_timing_overhead;
+
+/* Set timestamp value to zero.  */
+#define HP_TIMING_ZERO(Var)	(Var) = (0)
+
+
+/* The Itanium/Merced has a bug where the ar.itc register value read
+   is not correct in some situations.  The solution is to read again.
+   For now we always do this until we know how to recognize a fixed
+   processor implementation.  */
+#define REPEAT_READ(val) __builtin_expect ((int) val == -1, 0)
+
+/* That's quite simple.  Use the `rdtsc' instruction.  Note that the value
+   might not be 100% accurate since there might be some more instructions
+   running in this moment.  This could be changed by using a barrier like
+   'cpuid' right before the `rdtsc' instruciton.  But we are not interested
+   in accurate clock cycles here so we don't do this.  */
+#define HP_TIMING_NOW(Var) \
+  ({ unsigned long int __itc;						      \
+     do									      \
+       asm volatile ("mov %0=ar.itc" : "=r" (__itc) : : "memory");	      \
+     while (REPEAT_READ (__itc));					      \
+     Var = __itc; })
+
+/* Use two 'ar.itc' instructions in a row to find out how long it takes.  */
+#define HP_TIMING_DIFF_INIT() \
+  do {									      \
+    int __cnt = 5;							      \
+    __libc_hp_timing_overhead = ~0ul;					      \
+    do									      \
+      {									      \
+	hp_timing_t __t1, __t2;						      \
+	HP_TIMING_NOW (__t1);						      \
+	HP_TIMING_NOW (__t2);						      \
+	if (__t2 - __t1 < __libc_hp_timing_overhead)			      \
+	  __libc_hp_timing_overhead = __t2 - __t1;			      \
+      }									      \
+    while (--__cnt > 0);						      \
+  } while (0)
+
+/* It's simple arithmetic for us.  */
+#define HP_TIMING_DIFF(Diff, Start, End)	(Diff) = ((End) - (Start))
+
+/* We have to jump through hoops to get this correctly implemented.  */
+#define HP_TIMING_ACCUM(Sum, Diff) \
+  do {									      \
+    hp_timing_t __oldval;						      \
+    hp_timing_t __diff = (Diff) - __libc_hp_timing_overhead;		      \
+    hp_timing_t __newval;						      \
+    do									      \
+      {									      \
+	__oldval = (Sum);						      \
+	__newval = __oldval + __diff;					      \
+      }									      \
+    while (! __sync_bool_compare_and_swap (&Sum, __oldvar, __newval));	      \
+  } while (0)
+
+/* No threads, no extra work.  */
+#define HP_TIMING_ACCUM_NT(Sum, Diff)	(Sum) += (Diff)
+
+/* Print the time value.  */
+#define HP_TIMING_PRINT(Buf, Len, Val) \
+  do {									      \
+    char __buf[20];							      \
+    char *__cp = _itoa_word (Val, __buf + sizeof (__buf), 10, 0);	      \
+    int __len = (Len);							      \
+    char *__dest = (Buf);						      \
+    while (__len-- > 0 && __cp < __buf + sizeof (__buf))		      \
+      *__dest++ = *__cp++;						      \
+    memcpy (__dest, " clock cycles", MIN (__len, sizeof (" clock cycles")));  \
+  } while (0)
+
+#endif	/* hp-timing.h */

sysdeps/unix/sysv/linux/ia64/bits/time.h

@@ -43,10 +43,14 @@ extern long int __sysconf (int);
 
 #  ifdef __USE_POSIX199309
 /* Identifier for system-wide realtime clock.  */
-#   define CLOCK_REALTIME	0
+#   define CLOCK_REALTIME		0
+/* High-resolution timer from the CPU.  */
+#   define CLOCK_PROCESS_CPUTIME_ID     2
+/* Thread-specific CPU-time clock.  */
+#   define CLOCK_THREAD_CPUTIME_ID      3
 
 /* Flag to indicate time is absolute.  */
-#   define TIMER_ABSTIME	1
+#   define TIMER_ABSTIME		1
 #  endif
 
 # endif	/* bits/time.h */