/* Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010
|
/* Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010
|
Free Software Foundation, Inc.
|
Free Software Foundation, Inc.
|
Contributed by Richard Henderson <rth@redhat.com>.
|
Contributed by Richard Henderson <rth@redhat.com>.
|
|
|
This file is part of the GNU OpenMP Library (libgomp).
|
This file is part of the GNU OpenMP Library (libgomp).
|
|
|
Libgomp is free software; you can redistribute it and/or modify it
|
Libgomp is free software; you can redistribute it and/or modify it
|
under the terms of the GNU General Public License as published by
|
under the terms of the GNU General Public License as published by
|
the Free Software Foundation; either version 3, or (at your option)
|
the Free Software Foundation; either version 3, or (at your option)
|
any later version.
|
any later version.
|
|
|
Libgomp is distributed in the hope that it will be useful, but WITHOUT ANY
|
Libgomp is distributed in the hope that it will be useful, but WITHOUT ANY
|
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
|
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
|
FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
more details.
|
more details.
|
|
|
Under Section 7 of GPL version 3, you are granted additional
|
Under Section 7 of GPL version 3, you are granted additional
|
permissions described in the GCC Runtime Library Exception, version
|
permissions described in the GCC Runtime Library Exception, version
|
3.1, as published by the Free Software Foundation.
|
3.1, as published by the Free Software Foundation.
|
|
|
You should have received a copy of the GNU General Public License and
|
You should have received a copy of the GNU General Public License and
|
a copy of the GCC Runtime Library Exception along with this program;
|
a copy of the GCC Runtime Library Exception along with this program;
|
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
|
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
|
<http://www.gnu.org/licenses/>. */
|
<http://www.gnu.org/licenses/>. */
|
|
|
/* This file defines the OpenMP internal control variables, and arranges
|
/* This file defines the OpenMP internal control variables, and arranges
|
for them to be initialized from environment variables at startup. */
|
for them to be initialized from environment variables at startup. */
|
|
|
#include "libgomp.h"
|
#include "libgomp.h"
|
#include "libgomp_f.h"
|
#include "libgomp_f.h"
|
#include <ctype.h>
|
#include <ctype.h>
|
#include <stdlib.h>
|
#include <stdlib.h>
|
#ifdef STRING_WITH_STRINGS
|
#ifdef STRING_WITH_STRINGS
|
# include <string.h>
|
# include <string.h>
|
# include <strings.h>
|
# include <strings.h>
|
#else
|
#else
|
# ifdef HAVE_STRING_H
|
# ifdef HAVE_STRING_H
|
# include <string.h>
|
# include <string.h>
|
# else
|
# else
|
# ifdef HAVE_STRINGS_H
|
# ifdef HAVE_STRINGS_H
|
# include <strings.h>
|
# include <strings.h>
|
# endif
|
# endif
|
# endif
|
# endif
|
#endif
|
#endif
|
#include <limits.h>
|
#include <limits.h>
|
#include <errno.h>
|
#include <errno.h>
|
|
|
#ifndef HAVE_STRTOULL
|
#ifndef HAVE_STRTOULL
|
# define strtoull(ptr, eptr, base) strtoul (ptr, eptr, base)
|
# define strtoull(ptr, eptr, base) strtoul (ptr, eptr, base)
|
#endif
|
#endif
|
|
|
struct gomp_task_icv gomp_global_icv = {
|
struct gomp_task_icv gomp_global_icv = {
|
.nthreads_var = 1,
|
.nthreads_var = 1,
|
.run_sched_var = GFS_DYNAMIC,
|
.run_sched_var = GFS_DYNAMIC,
|
.run_sched_modifier = 1,
|
.run_sched_modifier = 1,
|
.dyn_var = false,
|
.dyn_var = false,
|
.nest_var = false
|
.nest_var = false
|
};
|
};
|
|
|
unsigned short *gomp_cpu_affinity;
|
unsigned short *gomp_cpu_affinity;
|
size_t gomp_cpu_affinity_len;
|
size_t gomp_cpu_affinity_len;
|
unsigned long gomp_max_active_levels_var = INT_MAX;
|
unsigned long gomp_max_active_levels_var = INT_MAX;
|
unsigned long gomp_thread_limit_var = ULONG_MAX;
|
unsigned long gomp_thread_limit_var = ULONG_MAX;
|
unsigned long gomp_remaining_threads_count;
|
unsigned long gomp_remaining_threads_count;
|
#ifndef HAVE_SYNC_BUILTINS
|
#ifndef HAVE_SYNC_BUILTINS
|
gomp_mutex_t gomp_remaining_threads_lock;
|
gomp_mutex_t gomp_remaining_threads_lock;
|
#endif
|
#endif
|
unsigned long gomp_available_cpus = 1, gomp_managed_threads = 1;
|
unsigned long gomp_available_cpus = 1, gomp_managed_threads = 1;
|
unsigned long long gomp_spin_count_var, gomp_throttled_spin_count_var;
|
unsigned long long gomp_spin_count_var, gomp_throttled_spin_count_var;
|
|
|
/* Parse the OMP_SCHEDULE environment variable. */
|
/* Parse the OMP_SCHEDULE environment variable. */
|
|
|
static void
|
static void
|
parse_schedule (void)
|
parse_schedule (void)
|
{
|
{
|
char *env, *end;
|
char *env, *end;
|
unsigned long value;
|
unsigned long value;
|
|
|
env = getenv ("OMP_SCHEDULE");
|
env = getenv ("OMP_SCHEDULE");
|
if (env == NULL)
|
if (env == NULL)
|
return;
|
return;
|
|
|
while (isspace ((unsigned char) *env))
|
while (isspace ((unsigned char) *env))
|
++env;
|
++env;
|
if (strncasecmp (env, "static", 6) == 0)
|
if (strncasecmp (env, "static", 6) == 0)
|
{
|
{
|
gomp_global_icv.run_sched_var = GFS_STATIC;
|
gomp_global_icv.run_sched_var = GFS_STATIC;
|
env += 6;
|
env += 6;
|
}
|
}
|
else if (strncasecmp (env, "dynamic", 7) == 0)
|
else if (strncasecmp (env, "dynamic", 7) == 0)
|
{
|
{
|
gomp_global_icv.run_sched_var = GFS_DYNAMIC;
|
gomp_global_icv.run_sched_var = GFS_DYNAMIC;
|
env += 7;
|
env += 7;
|
}
|
}
|
else if (strncasecmp (env, "guided", 6) == 0)
|
else if (strncasecmp (env, "guided", 6) == 0)
|
{
|
{
|
gomp_global_icv.run_sched_var = GFS_GUIDED;
|
gomp_global_icv.run_sched_var = GFS_GUIDED;
|
env += 6;
|
env += 6;
|
}
|
}
|
else if (strncasecmp (env, "auto", 4) == 0)
|
else if (strncasecmp (env, "auto", 4) == 0)
|
{
|
{
|
gomp_global_icv.run_sched_var = GFS_AUTO;
|
gomp_global_icv.run_sched_var = GFS_AUTO;
|
env += 4;
|
env += 4;
|
}
|
}
|
else
|
else
|
goto unknown;
|
goto unknown;
|
|
|
while (isspace ((unsigned char) *env))
|
while (isspace ((unsigned char) *env))
|
++env;
|
++env;
|
if (*env == '\0')
|
if (*env == '\0')
|
return;
|
return;
|
if (*env++ != ',')
|
if (*env++ != ',')
|
goto unknown;
|
goto unknown;
|
while (isspace ((unsigned char) *env))
|
while (isspace ((unsigned char) *env))
|
++env;
|
++env;
|
if (*env == '\0')
|
if (*env == '\0')
|
goto invalid;
|
goto invalid;
|
|
|
errno = 0;
|
errno = 0;
|
value = strtoul (env, &end, 10);
|
value = strtoul (env, &end, 10);
|
if (errno)
|
if (errno)
|
goto invalid;
|
goto invalid;
|
|
|
while (isspace ((unsigned char) *end))
|
while (isspace ((unsigned char) *end))
|
++end;
|
++end;
|
if (*end != '\0')
|
if (*end != '\0')
|
goto invalid;
|
goto invalid;
|
|
|
if ((int)value != value)
|
if ((int)value != value)
|
goto invalid;
|
goto invalid;
|
|
|
gomp_global_icv.run_sched_modifier = value;
|
gomp_global_icv.run_sched_modifier = value;
|
return;
|
return;
|
|
|
unknown:
|
unknown:
|
gomp_error ("Unknown value for environment variable OMP_SCHEDULE");
|
gomp_error ("Unknown value for environment variable OMP_SCHEDULE");
|
return;
|
return;
|
|
|
invalid:
|
invalid:
|
gomp_error ("Invalid value for chunk size in "
|
gomp_error ("Invalid value for chunk size in "
|
"environment variable OMP_SCHEDULE");
|
"environment variable OMP_SCHEDULE");
|
return;
|
return;
|
}
|
}
|
|
|
/* Parse an unsigned long environment variable. Return true if one was
|
/* Parse an unsigned long environment variable. Return true if one was
|
present and it was successfully parsed. */
|
present and it was successfully parsed. */
|
|
|
static bool
|
static bool
|
parse_unsigned_long (const char *name, unsigned long *pvalue, bool allow_zero)
|
parse_unsigned_long (const char *name, unsigned long *pvalue, bool allow_zero)
|
{
|
{
|
char *env, *end;
|
char *env, *end;
|
unsigned long value;
|
unsigned long value;
|
|
|
env = getenv (name);
|
env = getenv (name);
|
if (env == NULL)
|
if (env == NULL)
|
return false;
|
return false;
|
|
|
while (isspace ((unsigned char) *env))
|
while (isspace ((unsigned char) *env))
|
++env;
|
++env;
|
if (*env == '\0')
|
if (*env == '\0')
|
goto invalid;
|
goto invalid;
|
|
|
errno = 0;
|
errno = 0;
|
value = strtoul (env, &end, 10);
|
value = strtoul (env, &end, 10);
|
if (errno || (long) value <= 0 - allow_zero)
|
if (errno || (long) value <= 0 - allow_zero)
|
goto invalid;
|
goto invalid;
|
|
|
while (isspace ((unsigned char) *end))
|
while (isspace ((unsigned char) *end))
|
++end;
|
++end;
|
if (*end != '\0')
|
if (*end != '\0')
|
goto invalid;
|
goto invalid;
|
|
|
*pvalue = value;
|
*pvalue = value;
|
return true;
|
return true;
|
|
|
invalid:
|
invalid:
|
gomp_error ("Invalid value for environment variable %s", name);
|
gomp_error ("Invalid value for environment variable %s", name);
|
return false;
|
return false;
|
}
|
}
|
|
|
/* Parse the OMP_STACKSIZE environment varible. Return true if one was
|
/* Parse the OMP_STACKSIZE environment varible. Return true if one was
|
present and it was successfully parsed. */
|
present and it was successfully parsed. */
|
|
|
static bool
|
static bool
|
parse_stacksize (const char *name, unsigned long *pvalue)
|
parse_stacksize (const char *name, unsigned long *pvalue)
|
{
|
{
|
char *env, *end;
|
char *env, *end;
|
unsigned long value, shift = 10;
|
unsigned long value, shift = 10;
|
|
|
env = getenv (name);
|
env = getenv (name);
|
if (env == NULL)
|
if (env == NULL)
|
return false;
|
return false;
|
|
|
while (isspace ((unsigned char) *env))
|
while (isspace ((unsigned char) *env))
|
++env;
|
++env;
|
if (*env == '\0')
|
if (*env == '\0')
|
goto invalid;
|
goto invalid;
|
|
|
errno = 0;
|
errno = 0;
|
value = strtoul (env, &end, 10);
|
value = strtoul (env, &end, 10);
|
if (errno)
|
if (errno)
|
goto invalid;
|
goto invalid;
|
|
|
while (isspace ((unsigned char) *end))
|
while (isspace ((unsigned char) *end))
|
++end;
|
++end;
|
if (*end != '\0')
|
if (*end != '\0')
|
{
|
{
|
switch (tolower ((unsigned char) *end))
|
switch (tolower ((unsigned char) *end))
|
{
|
{
|
case 'b':
|
case 'b':
|
shift = 0;
|
shift = 0;
|
break;
|
break;
|
case 'k':
|
case 'k':
|
break;
|
break;
|
case 'm':
|
case 'm':
|
shift = 20;
|
shift = 20;
|
break;
|
break;
|
case 'g':
|
case 'g':
|
shift = 30;
|
shift = 30;
|
break;
|
break;
|
default:
|
default:
|
goto invalid;
|
goto invalid;
|
}
|
}
|
++end;
|
++end;
|
while (isspace ((unsigned char) *end))
|
while (isspace ((unsigned char) *end))
|
++end;
|
++end;
|
if (*end != '\0')
|
if (*end != '\0')
|
goto invalid;
|
goto invalid;
|
}
|
}
|
|
|
if (((value << shift) >> shift) != value)
|
if (((value << shift) >> shift) != value)
|
goto invalid;
|
goto invalid;
|
|
|
*pvalue = value << shift;
|
*pvalue = value << shift;
|
return true;
|
return true;
|
|
|
invalid:
|
invalid:
|
gomp_error ("Invalid value for environment variable %s", name);
|
gomp_error ("Invalid value for environment variable %s", name);
|
return false;
|
return false;
|
}
|
}
|
|
|
/* Parse the GOMP_SPINCOUNT environment varible. Return true if one was
|
/* Parse the GOMP_SPINCOUNT environment varible. Return true if one was
|
present and it was successfully parsed. */
|
present and it was successfully parsed. */
|
|
|
static bool
|
static bool
|
parse_spincount (const char *name, unsigned long long *pvalue)
|
parse_spincount (const char *name, unsigned long long *pvalue)
|
{
|
{
|
char *env, *end;
|
char *env, *end;
|
unsigned long long value, mult = 1;
|
unsigned long long value, mult = 1;
|
|
|
env = getenv (name);
|
env = getenv (name);
|
if (env == NULL)
|
if (env == NULL)
|
return false;
|
return false;
|
|
|
while (isspace ((unsigned char) *env))
|
while (isspace ((unsigned char) *env))
|
++env;
|
++env;
|
if (*env == '\0')
|
if (*env == '\0')
|
goto invalid;
|
goto invalid;
|
|
|
if (strncasecmp (env, "infinite", 8) == 0
|
if (strncasecmp (env, "infinite", 8) == 0
|
|| strncasecmp (env, "infinity", 8) == 0)
|
|| strncasecmp (env, "infinity", 8) == 0)
|
{
|
{
|
value = ~0ULL;
|
value = ~0ULL;
|
end = env + 8;
|
end = env + 8;
|
goto check_tail;
|
goto check_tail;
|
}
|
}
|
|
|
errno = 0;
|
errno = 0;
|
value = strtoull (env, &end, 10);
|
value = strtoull (env, &end, 10);
|
if (errno)
|
if (errno)
|
goto invalid;
|
goto invalid;
|
|
|
while (isspace ((unsigned char) *end))
|
while (isspace ((unsigned char) *end))
|
++end;
|
++end;
|
if (*end != '\0')
|
if (*end != '\0')
|
{
|
{
|
switch (tolower ((unsigned char) *end))
|
switch (tolower ((unsigned char) *end))
|
{
|
{
|
case 'k':
|
case 'k':
|
mult = 1000LL;
|
mult = 1000LL;
|
break;
|
break;
|
case 'm':
|
case 'm':
|
mult = 1000LL * 1000LL;
|
mult = 1000LL * 1000LL;
|
break;
|
break;
|
case 'g':
|
case 'g':
|
mult = 1000LL * 1000LL * 1000LL;
|
mult = 1000LL * 1000LL * 1000LL;
|
break;
|
break;
|
case 't':
|
case 't':
|
mult = 1000LL * 1000LL * 1000LL * 1000LL;
|
mult = 1000LL * 1000LL * 1000LL * 1000LL;
|
break;
|
break;
|
default:
|
default:
|
goto invalid;
|
goto invalid;
|
}
|
}
|
++end;
|
++end;
|
check_tail:
|
check_tail:
|
while (isspace ((unsigned char) *end))
|
while (isspace ((unsigned char) *end))
|
++end;
|
++end;
|
if (*end != '\0')
|
if (*end != '\0')
|
goto invalid;
|
goto invalid;
|
}
|
}
|
|
|
if (value > ~0ULL / mult)
|
if (value > ~0ULL / mult)
|
value = ~0ULL;
|
value = ~0ULL;
|
else
|
else
|
value *= mult;
|
value *= mult;
|
|
|
*pvalue = value;
|
*pvalue = value;
|
return true;
|
return true;
|
|
|
invalid:
|
invalid:
|
gomp_error ("Invalid value for environment variable %s", name);
|
gomp_error ("Invalid value for environment variable %s", name);
|
return false;
|
return false;
|
}
|
}
|
|
|
/* Parse a boolean value for environment variable NAME and store the
|
/* Parse a boolean value for environment variable NAME and store the
|
result in VALUE. */
|
result in VALUE. */
|
|
|
static void
|
static void
|
parse_boolean (const char *name, bool *value)
|
parse_boolean (const char *name, bool *value)
|
{
|
{
|
const char *env;
|
const char *env;
|
|
|
env = getenv (name);
|
env = getenv (name);
|
if (env == NULL)
|
if (env == NULL)
|
return;
|
return;
|
|
|
while (isspace ((unsigned char) *env))
|
while (isspace ((unsigned char) *env))
|
++env;
|
++env;
|
if (strncasecmp (env, "true", 4) == 0)
|
if (strncasecmp (env, "true", 4) == 0)
|
{
|
{
|
*value = true;
|
*value = true;
|
env += 4;
|
env += 4;
|
}
|
}
|
else if (strncasecmp (env, "false", 5) == 0)
|
else if (strncasecmp (env, "false", 5) == 0)
|
{
|
{
|
*value = false;
|
*value = false;
|
env += 5;
|
env += 5;
|
}
|
}
|
else
|
else
|
env = "X";
|
env = "X";
|
while (isspace ((unsigned char) *env))
|
while (isspace ((unsigned char) *env))
|
++env;
|
++env;
|
if (*env != '\0')
|
if (*env != '\0')
|
gomp_error ("Invalid value for environment variable %s", name);
|
gomp_error ("Invalid value for environment variable %s", name);
|
}
|
}
|
|
|
/* Parse the OMP_WAIT_POLICY environment variable and store the
|
/* Parse the OMP_WAIT_POLICY environment variable and store the
|
result in gomp_active_wait_policy. */
|
result in gomp_active_wait_policy. */
|
|
|
static int
|
static int
|
parse_wait_policy (void)
|
parse_wait_policy (void)
|
{
|
{
|
const char *env;
|
const char *env;
|
int ret = -1;
|
int ret = -1;
|
|
|
env = getenv ("OMP_WAIT_POLICY");
|
env = getenv ("OMP_WAIT_POLICY");
|
if (env == NULL)
|
if (env == NULL)
|
return -1;
|
return -1;
|
|
|
while (isspace ((unsigned char) *env))
|
while (isspace ((unsigned char) *env))
|
++env;
|
++env;
|
if (strncasecmp (env, "active", 6) == 0)
|
if (strncasecmp (env, "active", 6) == 0)
|
{
|
{
|
ret = 1;
|
ret = 1;
|
env += 6;
|
env += 6;
|
}
|
}
|
else if (strncasecmp (env, "passive", 7) == 0)
|
else if (strncasecmp (env, "passive", 7) == 0)
|
{
|
{
|
ret = 0;
|
ret = 0;
|
env += 7;
|
env += 7;
|
}
|
}
|
else
|
else
|
env = "X";
|
env = "X";
|
while (isspace ((unsigned char) *env))
|
while (isspace ((unsigned char) *env))
|
++env;
|
++env;
|
if (*env == '\0')
|
if (*env == '\0')
|
return ret;
|
return ret;
|
gomp_error ("Invalid value for environment variable OMP_WAIT_POLICY");
|
gomp_error ("Invalid value for environment variable OMP_WAIT_POLICY");
|
return -1;
|
return -1;
|
}
|
}
|
|
|
/* Parse the GOMP_CPU_AFFINITY environment varible. Return true if one was
|
/* Parse the GOMP_CPU_AFFINITY environment varible. Return true if one was
|
present and it was successfully parsed. */
|
present and it was successfully parsed. */
|
|
|
static bool
|
static bool
|
parse_affinity (void)
|
parse_affinity (void)
|
{
|
{
|
char *env, *end;
|
char *env, *end;
|
unsigned long cpu_beg, cpu_end, cpu_stride;
|
unsigned long cpu_beg, cpu_end, cpu_stride;
|
unsigned short *cpus = NULL;
|
unsigned short *cpus = NULL;
|
size_t allocated = 0, used = 0, needed;
|
size_t allocated = 0, used = 0, needed;
|
|
|
env = getenv ("GOMP_CPU_AFFINITY");
|
env = getenv ("GOMP_CPU_AFFINITY");
|
if (env == NULL)
|
if (env == NULL)
|
return false;
|
return false;
|
|
|
do
|
do
|
{
|
{
|
while (*env == ' ' || *env == '\t')
|
while (*env == ' ' || *env == '\t')
|
env++;
|
env++;
|
|
|
cpu_beg = strtoul (env, &end, 0);
|
cpu_beg = strtoul (env, &end, 0);
|
cpu_end = cpu_beg;
|
cpu_end = cpu_beg;
|
cpu_stride = 1;
|
cpu_stride = 1;
|
if (env == end || cpu_beg >= 65536)
|
if (env == end || cpu_beg >= 65536)
|
goto invalid;
|
goto invalid;
|
|
|
env = end;
|
env = end;
|
if (*env == '-')
|
if (*env == '-')
|
{
|
{
|
cpu_end = strtoul (++env, &end, 0);
|
cpu_end = strtoul (++env, &end, 0);
|
if (env == end || cpu_end >= 65536 || cpu_end < cpu_beg)
|
if (env == end || cpu_end >= 65536 || cpu_end < cpu_beg)
|
goto invalid;
|
goto invalid;
|
|
|
env = end;
|
env = end;
|
if (*env == ':')
|
if (*env == ':')
|
{
|
{
|
cpu_stride = strtoul (++env, &end, 0);
|
cpu_stride = strtoul (++env, &end, 0);
|
if (env == end || cpu_stride == 0 || cpu_stride >= 65536)
|
if (env == end || cpu_stride == 0 || cpu_stride >= 65536)
|
goto invalid;
|
goto invalid;
|
|
|
env = end;
|
env = end;
|
}
|
}
|
}
|
}
|
|
|
needed = (cpu_end - cpu_beg) / cpu_stride + 1;
|
needed = (cpu_end - cpu_beg) / cpu_stride + 1;
|
if (used + needed >= allocated)
|
if (used + needed >= allocated)
|
{
|
{
|
unsigned short *new_cpus;
|
unsigned short *new_cpus;
|
|
|
if (allocated < 64)
|
if (allocated < 64)
|
allocated = 64;
|
allocated = 64;
|
if (allocated > needed)
|
if (allocated > needed)
|
allocated <<= 1;
|
allocated <<= 1;
|
else
|
else
|
allocated += 2 * needed;
|
allocated += 2 * needed;
|
new_cpus = realloc (cpus, allocated * sizeof (unsigned short));
|
new_cpus = realloc (cpus, allocated * sizeof (unsigned short));
|
if (new_cpus == NULL)
|
if (new_cpus == NULL)
|
{
|
{
|
free (cpus);
|
free (cpus);
|
gomp_error ("not enough memory to store GOMP_CPU_AFFINITY list");
|
gomp_error ("not enough memory to store GOMP_CPU_AFFINITY list");
|
return false;
|
return false;
|
}
|
}
|
|
|
cpus = new_cpus;
|
cpus = new_cpus;
|
}
|
}
|
|
|
while (needed--)
|
while (needed--)
|
{
|
{
|
cpus[used++] = cpu_beg;
|
cpus[used++] = cpu_beg;
|
cpu_beg += cpu_stride;
|
cpu_beg += cpu_stride;
|
}
|
}
|
|
|
while (*env == ' ' || *env == '\t')
|
while (*env == ' ' || *env == '\t')
|
env++;
|
env++;
|
|
|
if (*env == ',')
|
if (*env == ',')
|
env++;
|
env++;
|
else if (*env == '\0')
|
else if (*env == '\0')
|
break;
|
break;
|
}
|
}
|
while (1);
|
while (1);
|
|
|
gomp_cpu_affinity = cpus;
|
gomp_cpu_affinity = cpus;
|
gomp_cpu_affinity_len = used;
|
gomp_cpu_affinity_len = used;
|
return true;
|
return true;
|
|
|
invalid:
|
invalid:
|
gomp_error ("Invalid value for enviroment variable GOMP_CPU_AFFINITY");
|
gomp_error ("Invalid value for enviroment variable GOMP_CPU_AFFINITY");
|
return false;
|
return false;
|
}
|
}
|
|
|
static void __attribute__((constructor))
|
static void __attribute__((constructor))
|
initialize_env (void)
|
initialize_env (void)
|
{
|
{
|
unsigned long stacksize;
|
unsigned long stacksize;
|
int wait_policy;
|
int wait_policy;
|
|
|
/* Do a compile time check that mkomp_h.pl did good job. */
|
/* Do a compile time check that mkomp_h.pl did good job. */
|
omp_check_defines ();
|
omp_check_defines ();
|
|
|
parse_schedule ();
|
parse_schedule ();
|
parse_boolean ("OMP_DYNAMIC", &gomp_global_icv.dyn_var);
|
parse_boolean ("OMP_DYNAMIC", &gomp_global_icv.dyn_var);
|
parse_boolean ("OMP_NESTED", &gomp_global_icv.nest_var);
|
parse_boolean ("OMP_NESTED", &gomp_global_icv.nest_var);
|
parse_unsigned_long ("OMP_MAX_ACTIVE_LEVELS", &gomp_max_active_levels_var,
|
parse_unsigned_long ("OMP_MAX_ACTIVE_LEVELS", &gomp_max_active_levels_var,
|
true);
|
true);
|
parse_unsigned_long ("OMP_THREAD_LIMIT", &gomp_thread_limit_var, false);
|
parse_unsigned_long ("OMP_THREAD_LIMIT", &gomp_thread_limit_var, false);
|
if (gomp_thread_limit_var != ULONG_MAX)
|
if (gomp_thread_limit_var != ULONG_MAX)
|
gomp_remaining_threads_count = gomp_thread_limit_var - 1;
|
gomp_remaining_threads_count = gomp_thread_limit_var - 1;
|
#ifndef HAVE_SYNC_BUILTINS
|
#ifndef HAVE_SYNC_BUILTINS
|
gomp_mutex_init (&gomp_remaining_threads_lock);
|
gomp_mutex_init (&gomp_remaining_threads_lock);
|
#endif
|
#endif
|
gomp_init_num_threads ();
|
gomp_init_num_threads ();
|
gomp_available_cpus = gomp_global_icv.nthreads_var;
|
gomp_available_cpus = gomp_global_icv.nthreads_var;
|
if (!parse_unsigned_long ("OMP_NUM_THREADS", &gomp_global_icv.nthreads_var,
|
if (!parse_unsigned_long ("OMP_NUM_THREADS", &gomp_global_icv.nthreads_var,
|
false))
|
false))
|
gomp_global_icv.nthreads_var = gomp_available_cpus;
|
gomp_global_icv.nthreads_var = gomp_available_cpus;
|
if (parse_affinity ())
|
if (parse_affinity ())
|
gomp_init_affinity ();
|
gomp_init_affinity ();
|
wait_policy = parse_wait_policy ();
|
wait_policy = parse_wait_policy ();
|
if (!parse_spincount ("GOMP_SPINCOUNT", &gomp_spin_count_var))
|
if (!parse_spincount ("GOMP_SPINCOUNT", &gomp_spin_count_var))
|
{
|
{
|
/* Using a rough estimation of 100000 spins per msec,
|
/* Using a rough estimation of 100000 spins per msec,
|
use 5 min blocking for OMP_WAIT_POLICY=active,
|
use 5 min blocking for OMP_WAIT_POLICY=active,
|
200 msec blocking when OMP_WAIT_POLICY is not specificed
|
200 msec blocking when OMP_WAIT_POLICY is not specificed
|
and 0 when OMP_WAIT_POLICY=passive.
|
and 0 when OMP_WAIT_POLICY=passive.
|
Depending on the CPU speed, this can be e.g. 5 times longer
|
Depending on the CPU speed, this can be e.g. 5 times longer
|
or 5 times shorter. */
|
or 5 times shorter. */
|
if (wait_policy > 0)
|
if (wait_policy > 0)
|
gomp_spin_count_var = 30000000000LL;
|
gomp_spin_count_var = 30000000000LL;
|
else if (wait_policy < 0)
|
else if (wait_policy < 0)
|
gomp_spin_count_var = 20000000LL;
|
gomp_spin_count_var = 20000000LL;
|
}
|
}
|
/* gomp_throttled_spin_count_var is used when there are more libgomp
|
/* gomp_throttled_spin_count_var is used when there are more libgomp
|
managed threads than available CPUs. Use very short spinning. */
|
managed threads than available CPUs. Use very short spinning. */
|
if (wait_policy > 0)
|
if (wait_policy > 0)
|
gomp_throttled_spin_count_var = 1000LL;
|
gomp_throttled_spin_count_var = 1000LL;
|
else if (wait_policy < 0)
|
else if (wait_policy < 0)
|
gomp_throttled_spin_count_var = 100LL;
|
gomp_throttled_spin_count_var = 100LL;
|
if (gomp_throttled_spin_count_var > gomp_spin_count_var)
|
if (gomp_throttled_spin_count_var > gomp_spin_count_var)
|
gomp_throttled_spin_count_var = gomp_spin_count_var;
|
gomp_throttled_spin_count_var = gomp_spin_count_var;
|
|
|
/* Not strictly environment related, but ordering constructors is tricky. */
|
/* Not strictly environment related, but ordering constructors is tricky. */
|
pthread_attr_init (&gomp_thread_attr);
|
pthread_attr_init (&gomp_thread_attr);
|
pthread_attr_setdetachstate (&gomp_thread_attr, PTHREAD_CREATE_DETACHED);
|
pthread_attr_setdetachstate (&gomp_thread_attr, PTHREAD_CREATE_DETACHED);
|
|
|
if (parse_stacksize ("OMP_STACKSIZE", &stacksize)
|
if (parse_stacksize ("OMP_STACKSIZE", &stacksize)
|
|| parse_stacksize ("GOMP_STACKSIZE", &stacksize))
|
|| parse_stacksize ("GOMP_STACKSIZE", &stacksize))
|
{
|
{
|
int err;
|
int err;
|
|
|
err = pthread_attr_setstacksize (&gomp_thread_attr, stacksize);
|
err = pthread_attr_setstacksize (&gomp_thread_attr, stacksize);
|
|
|
#ifdef PTHREAD_STACK_MIN
|
#ifdef PTHREAD_STACK_MIN
|
if (err == EINVAL)
|
if (err == EINVAL)
|
{
|
{
|
if (stacksize < PTHREAD_STACK_MIN)
|
if (stacksize < PTHREAD_STACK_MIN)
|
gomp_error ("Stack size less than minimum of %luk",
|
gomp_error ("Stack size less than minimum of %luk",
|
PTHREAD_STACK_MIN / 1024ul
|
PTHREAD_STACK_MIN / 1024ul
|
+ (PTHREAD_STACK_MIN % 1024 != 0));
|
+ (PTHREAD_STACK_MIN % 1024 != 0));
|
else
|
else
|
gomp_error ("Stack size larger than system limit");
|
gomp_error ("Stack size larger than system limit");
|
}
|
}
|
else
|
else
|
#endif
|
#endif
|
if (err != 0)
|
if (err != 0)
|
gomp_error ("Stack size change failed: %s", strerror (err));
|
gomp_error ("Stack size change failed: %s", strerror (err));
|
}
|
}
|
}
|
}
|
|
|
|
|
/* The public OpenMP API routines that access these variables. */
|
/* The public OpenMP API routines that access these variables. */
|
|
|
void
|
void
|
omp_set_num_threads (int n)
|
omp_set_num_threads (int n)
|
{
|
{
|
struct gomp_task_icv *icv = gomp_icv (true);
|
struct gomp_task_icv *icv = gomp_icv (true);
|
icv->nthreads_var = (n > 0 ? n : 1);
|
icv->nthreads_var = (n > 0 ? n : 1);
|
}
|
}
|
|
|
void
|
void
|
omp_set_dynamic (int val)
|
omp_set_dynamic (int val)
|
{
|
{
|
struct gomp_task_icv *icv = gomp_icv (true);
|
struct gomp_task_icv *icv = gomp_icv (true);
|
icv->dyn_var = val;
|
icv->dyn_var = val;
|
}
|
}
|
|
|
int
|
int
|
omp_get_dynamic (void)
|
omp_get_dynamic (void)
|
{
|
{
|
struct gomp_task_icv *icv = gomp_icv (false);
|
struct gomp_task_icv *icv = gomp_icv (false);
|
return icv->dyn_var;
|
return icv->dyn_var;
|
}
|
}
|
|
|
void
|
void
|
omp_set_nested (int val)
|
omp_set_nested (int val)
|
{
|
{
|
struct gomp_task_icv *icv = gomp_icv (true);
|
struct gomp_task_icv *icv = gomp_icv (true);
|
icv->nest_var = val;
|
icv->nest_var = val;
|
}
|
}
|
|
|
int
|
int
|
omp_get_nested (void)
|
omp_get_nested (void)
|
{
|
{
|
struct gomp_task_icv *icv = gomp_icv (false);
|
struct gomp_task_icv *icv = gomp_icv (false);
|
return icv->nest_var;
|
return icv->nest_var;
|
}
|
}
|
|
|
void
|
void
|
omp_set_schedule (omp_sched_t kind, int modifier)
|
omp_set_schedule (omp_sched_t kind, int modifier)
|
{
|
{
|
struct gomp_task_icv *icv = gomp_icv (true);
|
struct gomp_task_icv *icv = gomp_icv (true);
|
switch (kind)
|
switch (kind)
|
{
|
{
|
case omp_sched_static:
|
case omp_sched_static:
|
if (modifier < 1)
|
if (modifier < 1)
|
modifier = 0;
|
modifier = 0;
|
icv->run_sched_modifier = modifier;
|
icv->run_sched_modifier = modifier;
|
break;
|
break;
|
case omp_sched_dynamic:
|
case omp_sched_dynamic:
|
case omp_sched_guided:
|
case omp_sched_guided:
|
if (modifier < 1)
|
if (modifier < 1)
|
modifier = 1;
|
modifier = 1;
|
icv->run_sched_modifier = modifier;
|
icv->run_sched_modifier = modifier;
|
break;
|
break;
|
case omp_sched_auto:
|
case omp_sched_auto:
|
break;
|
break;
|
default:
|
default:
|
return;
|
return;
|
}
|
}
|
icv->run_sched_var = kind;
|
icv->run_sched_var = kind;
|
}
|
}
|
|
|
void
|
void
|
omp_get_schedule (omp_sched_t *kind, int *modifier)
|
omp_get_schedule (omp_sched_t *kind, int *modifier)
|
{
|
{
|
struct gomp_task_icv *icv = gomp_icv (false);
|
struct gomp_task_icv *icv = gomp_icv (false);
|
*kind = icv->run_sched_var;
|
*kind = icv->run_sched_var;
|
*modifier = icv->run_sched_modifier;
|
*modifier = icv->run_sched_modifier;
|
}
|
}
|
|
|
int
|
int
|
omp_get_max_threads (void)
|
omp_get_max_threads (void)
|
{
|
{
|
struct gomp_task_icv *icv = gomp_icv (false);
|
struct gomp_task_icv *icv = gomp_icv (false);
|
return icv->nthreads_var;
|
return icv->nthreads_var;
|
}
|
}
|
|
|
int
|
int
|
omp_get_thread_limit (void)
|
omp_get_thread_limit (void)
|
{
|
{
|
return gomp_thread_limit_var > INT_MAX ? INT_MAX : gomp_thread_limit_var;
|
return gomp_thread_limit_var > INT_MAX ? INT_MAX : gomp_thread_limit_var;
|
}
|
}
|
|
|
void
|
void
|
omp_set_max_active_levels (int max_levels)
|
omp_set_max_active_levels (int max_levels)
|
{
|
{
|
if (max_levels >= 0)
|
if (max_levels >= 0)
|
gomp_max_active_levels_var = max_levels;
|
gomp_max_active_levels_var = max_levels;
|
}
|
}
|
|
|
int
|
int
|
omp_get_max_active_levels (void)
|
omp_get_max_active_levels (void)
|
{
|
{
|
return gomp_max_active_levels_var;
|
return gomp_max_active_levels_var;
|
}
|
}
|
|
|
ialias (omp_set_dynamic)
|
ialias (omp_set_dynamic)
|
ialias (omp_set_nested)
|
ialias (omp_set_nested)
|
ialias (omp_set_num_threads)
|
ialias (omp_set_num_threads)
|
ialias (omp_get_dynamic)
|
ialias (omp_get_dynamic)
|
ialias (omp_get_nested)
|
ialias (omp_get_nested)
|
ialias (omp_set_schedule)
|
ialias (omp_set_schedule)
|
ialias (omp_get_schedule)
|
ialias (omp_get_schedule)
|
ialias (omp_get_max_threads)
|
ialias (omp_get_max_threads)
|
ialias (omp_get_thread_limit)
|
ialias (omp_get_thread_limit)
|
ialias (omp_set_max_active_levels)
|
ialias (omp_set_max_active_levels)
|
ialias (omp_get_max_active_levels)
|
ialias (omp_get_max_active_levels)
|
|
|
