1447 lines
32 KiB
C
1447 lines
32 KiB
C
/* Copyright (C) 2005-2014 Free Software Foundation, Inc.
|
||
Contributed by Richard Henderson <rth@redhat.com>.
|
||
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||
This file is part of the GNU OpenMP Library (libgomp).
|
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|
||
Libgomp is free software; you can redistribute it and/or modify it
|
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under the terms of the GNU General Public License as published by
|
||
the Free Software Foundation; either version 3, or (at your option)
|
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any later version.
|
||
|
||
Libgomp 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 General Public License for
|
||
more details.
|
||
|
||
Under Section 7 of GPL version 3, you are granted additional
|
||
permissions described in the GCC Runtime Library Exception, version
|
||
3.1, as published by the Free Software Foundation.
|
||
|
||
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;
|
||
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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||
<http://www.gnu.org/licenses/>. */
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||
|
||
/* This file defines the OpenMP internal control variables, and arranges
|
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for them to be initialized from environment variables at startup. */
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|
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#include "libgomp.h"
|
||
#include "libgomp_f.h"
|
||
#include <ctype.h>
|
||
#include <stdlib.h>
|
||
#include <stdio.h>
|
||
#ifdef HAVE_INTTYPES_H
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||
# include <inttypes.h> /* For PRIu64. */
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||
#endif
|
||
#ifdef STRING_WITH_STRINGS
|
||
# include <string.h>
|
||
# include <strings.h>
|
||
#else
|
||
# ifdef HAVE_STRING_H
|
||
# include <string.h>
|
||
# else
|
||
# ifdef HAVE_STRINGS_H
|
||
# include <strings.h>
|
||
# endif
|
||
# endif
|
||
#endif
|
||
#include <limits.h>
|
||
#include <errno.h>
|
||
|
||
#ifndef HAVE_STRTOULL
|
||
# define strtoull(ptr, eptr, base) strtoul (ptr, eptr, base)
|
||
#endif
|
||
|
||
struct gomp_task_icv gomp_global_icv = {
|
||
.nthreads_var = 1,
|
||
.thread_limit_var = UINT_MAX,
|
||
.run_sched_var = GFS_DYNAMIC,
|
||
.run_sched_modifier = 1,
|
||
.default_device_var = 0,
|
||
.dyn_var = false,
|
||
.nest_var = false,
|
||
.bind_var = omp_proc_bind_false,
|
||
.target_data = NULL
|
||
};
|
||
|
||
unsigned long gomp_max_active_levels_var = INT_MAX;
|
||
bool gomp_cancel_var = false;
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||
#ifndef HAVE_SYNC_BUILTINS
|
||
gomp_mutex_t gomp_managed_threads_lock;
|
||
#endif
|
||
unsigned long gomp_available_cpus = 1, gomp_managed_threads = 1;
|
||
unsigned long long gomp_spin_count_var, gomp_throttled_spin_count_var;
|
||
unsigned long *gomp_nthreads_var_list, gomp_nthreads_var_list_len;
|
||
char *gomp_bind_var_list;
|
||
unsigned long gomp_bind_var_list_len;
|
||
void **gomp_places_list;
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||
unsigned long gomp_places_list_len;
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||
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||
/* Parse the OMP_SCHEDULE environment variable. */
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||
|
||
static void
|
||
parse_schedule (void)
|
||
{
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||
char *env, *end;
|
||
unsigned long value;
|
||
|
||
env = getenv ("OMP_SCHEDULE");
|
||
if (env == NULL)
|
||
return;
|
||
|
||
while (isspace ((unsigned char) *env))
|
||
++env;
|
||
if (strncasecmp (env, "static", 6) == 0)
|
||
{
|
||
gomp_global_icv.run_sched_var = GFS_STATIC;
|
||
env += 6;
|
||
}
|
||
else if (strncasecmp (env, "dynamic", 7) == 0)
|
||
{
|
||
gomp_global_icv.run_sched_var = GFS_DYNAMIC;
|
||
env += 7;
|
||
}
|
||
else if (strncasecmp (env, "guided", 6) == 0)
|
||
{
|
||
gomp_global_icv.run_sched_var = GFS_GUIDED;
|
||
env += 6;
|
||
}
|
||
else if (strncasecmp (env, "auto", 4) == 0)
|
||
{
|
||
gomp_global_icv.run_sched_var = GFS_AUTO;
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||
env += 4;
|
||
}
|
||
else
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goto unknown;
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||
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while (isspace ((unsigned char) *env))
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||
++env;
|
||
if (*env == '\0')
|
||
{
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||
gomp_global_icv.run_sched_modifier
|
||
= gomp_global_icv.run_sched_var != GFS_STATIC;
|
||
return;
|
||
}
|
||
if (*env++ != ',')
|
||
goto unknown;
|
||
while (isspace ((unsigned char) *env))
|
||
++env;
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||
if (*env == '\0')
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goto invalid;
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||
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errno = 0;
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||
value = strtoul (env, &end, 10);
|
||
if (errno)
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||
goto invalid;
|
||
|
||
while (isspace ((unsigned char) *end))
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||
++end;
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||
if (*end != '\0')
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||
goto invalid;
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||
|
||
if ((int)value != value)
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||
goto invalid;
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||
|
||
if (value == 0 && gomp_global_icv.run_sched_var != GFS_STATIC)
|
||
value = 1;
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||
gomp_global_icv.run_sched_modifier = value;
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||
return;
|
||
|
||
unknown:
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||
gomp_error ("Unknown value for environment variable OMP_SCHEDULE");
|
||
return;
|
||
|
||
invalid:
|
||
gomp_error ("Invalid value for chunk size in "
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"environment variable OMP_SCHEDULE");
|
||
return;
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||
}
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/* Parse an unsigned long environment variable. Return true if one was
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present and it was successfully parsed. */
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||
|
||
static bool
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||
parse_unsigned_long (const char *name, unsigned long *pvalue, bool allow_zero)
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||
{
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||
char *env, *end;
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||
unsigned long value;
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||
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env = getenv (name);
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if (env == NULL)
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return false;
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||
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while (isspace ((unsigned char) *env))
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++env;
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if (*env == '\0')
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goto invalid;
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||
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||
errno = 0;
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||
value = strtoul (env, &end, 10);
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||
if (errno || (long) value <= 0 - allow_zero)
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||
goto invalid;
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||
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||
while (isspace ((unsigned char) *end))
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||
++end;
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||
if (*end != '\0')
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||
goto invalid;
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||
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||
*pvalue = value;
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||
return true;
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||
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||
invalid:
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||
gomp_error ("Invalid value for environment variable %s", name);
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||
return false;
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||
}
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||
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/* Parse a positive int environment variable. Return true if one was
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present and it was successfully parsed. */
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static bool
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parse_int (const char *name, int *pvalue, bool allow_zero)
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||
{
|
||
unsigned long value;
|
||
if (!parse_unsigned_long (name, &value, allow_zero))
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||
return false;
|
||
if (value > INT_MAX)
|
||
{
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||
gomp_error ("Invalid value for environment variable %s", name);
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||
return false;
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||
}
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||
*pvalue = (int) value;
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||
return true;
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||
}
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||
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/* Parse an unsigned long list environment variable. Return true if one was
|
||
present and it was successfully parsed. */
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||
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||
static bool
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parse_unsigned_long_list (const char *name, unsigned long *p1stvalue,
|
||
unsigned long **pvalues,
|
||
unsigned long *pnvalues)
|
||
{
|
||
char *env, *end;
|
||
unsigned long value, *values = NULL;
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||
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||
env = getenv (name);
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if (env == NULL)
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||
return false;
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||
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while (isspace ((unsigned char) *env))
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||
++env;
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||
if (*env == '\0')
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goto invalid;
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||
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errno = 0;
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||
value = strtoul (env, &end, 10);
|
||
if (errno || (long) value <= 0)
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||
goto invalid;
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||
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||
while (isspace ((unsigned char) *end))
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||
++end;
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||
if (*end != '\0')
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||
{
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||
if (*end == ',')
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||
{
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||
unsigned long nvalues = 0, nalloced = 0;
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||
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||
do
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{
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||
env = end + 1;
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||
if (nvalues == nalloced)
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{
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unsigned long *n;
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||
nalloced = nalloced ? nalloced * 2 : 16;
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n = realloc (values, nalloced * sizeof (unsigned long));
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if (n == NULL)
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{
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||
free (values);
|
||
gomp_error ("Out of memory while trying to parse"
|
||
" environment variable %s", name);
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return false;
|
||
}
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||
values = n;
|
||
if (nvalues == 0)
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||
values[nvalues++] = value;
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||
}
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||
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while (isspace ((unsigned char) *env))
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||
++env;
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||
if (*env == '\0')
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||
goto invalid;
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||
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||
errno = 0;
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||
value = strtoul (env, &end, 10);
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||
if (errno || (long) value <= 0)
|
||
goto invalid;
|
||
|
||
values[nvalues++] = value;
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||
while (isspace ((unsigned char) *end))
|
||
++end;
|
||
if (*end == '\0')
|
||
break;
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||
if (*end != ',')
|
||
goto invalid;
|
||
}
|
||
while (1);
|
||
*p1stvalue = values[0];
|
||
*pvalues = values;
|
||
*pnvalues = nvalues;
|
||
return true;
|
||
}
|
||
goto invalid;
|
||
}
|
||
|
||
*p1stvalue = value;
|
||
return true;
|
||
|
||
invalid:
|
||
free (values);
|
||
gomp_error ("Invalid value for environment variable %s", name);
|
||
return false;
|
||
}
|
||
|
||
/* Parse environment variable set to a boolean or list of omp_proc_bind_t
|
||
enum values. Return true if one was present and it was successfully
|
||
parsed. */
|
||
|
||
static bool
|
||
parse_bind_var (const char *name, char *p1stvalue,
|
||
char **pvalues, unsigned long *pnvalues)
|
||
{
|
||
char *env;
|
||
char value = omp_proc_bind_false, *values = NULL;
|
||
int i;
|
||
static struct proc_bind_kinds
|
||
{
|
||
const char name[7];
|
||
const char len;
|
||
omp_proc_bind_t kind;
|
||
} kinds[] =
|
||
{
|
||
{ "false", 5, omp_proc_bind_false },
|
||
{ "true", 4, omp_proc_bind_true },
|
||
{ "master", 6, omp_proc_bind_master },
|
||
{ "close", 5, omp_proc_bind_close },
|
||
{ "spread", 6, omp_proc_bind_spread }
|
||
};
|
||
|
||
env = getenv (name);
|
||
if (env == NULL)
|
||
return false;
|
||
|
||
while (isspace ((unsigned char) *env))
|
||
++env;
|
||
if (*env == '\0')
|
||
goto invalid;
|
||
|
||
for (i = 0; i < 5; i++)
|
||
if (strncasecmp (env, kinds[i].name, kinds[i].len) == 0)
|
||
{
|
||
value = kinds[i].kind;
|
||
env += kinds[i].len;
|
||
break;
|
||
}
|
||
if (i == 5)
|
||
goto invalid;
|
||
|
||
while (isspace ((unsigned char) *env))
|
||
++env;
|
||
if (*env != '\0')
|
||
{
|
||
if (*env == ',')
|
||
{
|
||
unsigned long nvalues = 0, nalloced = 0;
|
||
|
||
if (value == omp_proc_bind_false
|
||
|| value == omp_proc_bind_true)
|
||
goto invalid;
|
||
|
||
do
|
||
{
|
||
env++;
|
||
if (nvalues == nalloced)
|
||
{
|
||
char *n;
|
||
nalloced = nalloced ? nalloced * 2 : 16;
|
||
n = realloc (values, nalloced);
|
||
if (n == NULL)
|
||
{
|
||
free (values);
|
||
gomp_error ("Out of memory while trying to parse"
|
||
" environment variable %s", name);
|
||
return false;
|
||
}
|
||
values = n;
|
||
if (nvalues == 0)
|
||
values[nvalues++] = value;
|
||
}
|
||
|
||
while (isspace ((unsigned char) *env))
|
||
++env;
|
||
if (*env == '\0')
|
||
goto invalid;
|
||
|
||
for (i = 2; i < 5; i++)
|
||
if (strncasecmp (env, kinds[i].name, kinds[i].len) == 0)
|
||
{
|
||
value = kinds[i].kind;
|
||
env += kinds[i].len;
|
||
break;
|
||
}
|
||
if (i == 5)
|
||
goto invalid;
|
||
|
||
values[nvalues++] = value;
|
||
while (isspace ((unsigned char) *env))
|
||
++env;
|
||
if (*env == '\0')
|
||
break;
|
||
if (*env != ',')
|
||
goto invalid;
|
||
}
|
||
while (1);
|
||
*p1stvalue = values[0];
|
||
*pvalues = values;
|
||
*pnvalues = nvalues;
|
||
return true;
|
||
}
|
||
goto invalid;
|
||
}
|
||
|
||
*p1stvalue = value;
|
||
return true;
|
||
|
||
invalid:
|
||
free (values);
|
||
gomp_error ("Invalid value for environment variable %s", name);
|
||
return false;
|
||
}
|
||
|
||
static bool
|
||
parse_one_place (char **envp, bool *negatep, unsigned long *lenp,
|
||
long *stridep)
|
||
{
|
||
char *env = *envp, *start;
|
||
void *p = gomp_places_list ? gomp_places_list[gomp_places_list_len] : NULL;
|
||
unsigned long len = 1;
|
||
long stride = 1;
|
||
int pass;
|
||
bool any_negate = false;
|
||
*negatep = false;
|
||
while (isspace ((unsigned char) *env))
|
||
++env;
|
||
if (*env == '!')
|
||
{
|
||
*negatep = true;
|
||
++env;
|
||
while (isspace ((unsigned char) *env))
|
||
++env;
|
||
}
|
||
if (*env != '{')
|
||
return false;
|
||
++env;
|
||
while (isspace ((unsigned char) *env))
|
||
++env;
|
||
start = env;
|
||
for (pass = 0; pass < (any_negate ? 2 : 1); pass++)
|
||
{
|
||
env = start;
|
||
do
|
||
{
|
||
unsigned long this_num, this_len = 1;
|
||
long this_stride = 1;
|
||
bool this_negate = (*env == '!');
|
||
if (this_negate)
|
||
{
|
||
if (gomp_places_list)
|
||
any_negate = true;
|
||
++env;
|
||
while (isspace ((unsigned char) *env))
|
||
++env;
|
||
}
|
||
|
||
errno = 0;
|
||
this_num = strtoul (env, &env, 10);
|
||
if (errno)
|
||
return false;
|
||
while (isspace ((unsigned char) *env))
|
||
++env;
|
||
if (*env == ':')
|
||
{
|
||
++env;
|
||
while (isspace ((unsigned char) *env))
|
||
++env;
|
||
errno = 0;
|
||
this_len = strtoul (env, &env, 10);
|
||
if (errno || this_len == 0)
|
||
return false;
|
||
while (isspace ((unsigned char) *env))
|
||
++env;
|
||
if (*env == ':')
|
||
{
|
||
++env;
|
||
while (isspace ((unsigned char) *env))
|
||
++env;
|
||
errno = 0;
|
||
this_stride = strtol (env, &env, 10);
|
||
if (errno)
|
||
return false;
|
||
while (isspace ((unsigned char) *env))
|
||
++env;
|
||
}
|
||
}
|
||
if (this_negate && this_len != 1)
|
||
return false;
|
||
if (gomp_places_list && pass == this_negate)
|
||
{
|
||
if (this_negate)
|
||
{
|
||
if (!gomp_affinity_remove_cpu (p, this_num))
|
||
return false;
|
||
}
|
||
else if (!gomp_affinity_add_cpus (p, this_num, this_len,
|
||
this_stride, false))
|
||
return false;
|
||
}
|
||
if (*env == '}')
|
||
break;
|
||
if (*env != ',')
|
||
return false;
|
||
++env;
|
||
}
|
||
while (1);
|
||
}
|
||
|
||
++env;
|
||
while (isspace ((unsigned char) *env))
|
||
++env;
|
||
if (*env == ':')
|
||
{
|
||
++env;
|
||
while (isspace ((unsigned char) *env))
|
||
++env;
|
||
errno = 0;
|
||
len = strtoul (env, &env, 10);
|
||
if (errno || len == 0 || len >= 65536)
|
||
return false;
|
||
while (isspace ((unsigned char) *env))
|
||
++env;
|
||
if (*env == ':')
|
||
{
|
||
++env;
|
||
while (isspace ((unsigned char) *env))
|
||
++env;
|
||
errno = 0;
|
||
stride = strtol (env, &env, 10);
|
||
if (errno)
|
||
return false;
|
||
while (isspace ((unsigned char) *env))
|
||
++env;
|
||
}
|
||
}
|
||
if (*negatep && len != 1)
|
||
return false;
|
||
*envp = env;
|
||
*lenp = len;
|
||
*stridep = stride;
|
||
return true;
|
||
}
|
||
|
||
static bool
|
||
parse_places_var (const char *name, bool ignore)
|
||
{
|
||
char *env = getenv (name), *end;
|
||
bool any_negate = false;
|
||
int level = 0;
|
||
unsigned long count = 0;
|
||
if (env == NULL)
|
||
return false;
|
||
|
||
while (isspace ((unsigned char) *env))
|
||
++env;
|
||
if (*env == '\0')
|
||
goto invalid;
|
||
|
||
if (strncasecmp (env, "threads", 7) == 0)
|
||
{
|
||
env += 7;
|
||
level = 1;
|
||
}
|
||
else if (strncasecmp (env, "cores", 5) == 0)
|
||
{
|
||
env += 5;
|
||
level = 2;
|
||
}
|
||
else if (strncasecmp (env, "sockets", 7) == 0)
|
||
{
|
||
env += 7;
|
||
level = 3;
|
||
}
|
||
if (level)
|
||
{
|
||
count = ULONG_MAX;
|
||
while (isspace ((unsigned char) *env))
|
||
++env;
|
||
if (*env != '\0')
|
||
{
|
||
if (*env++ != '(')
|
||
goto invalid;
|
||
while (isspace ((unsigned char) *env))
|
||
++env;
|
||
|
||
errno = 0;
|
||
count = strtoul (env, &end, 10);
|
||
if (errno)
|
||
goto invalid;
|
||
env = end;
|
||
while (isspace ((unsigned char) *env))
|
||
++env;
|
||
if (*env != ')')
|
||
goto invalid;
|
||
++env;
|
||
while (isspace ((unsigned char) *env))
|
||
++env;
|
||
if (*env != '\0')
|
||
goto invalid;
|
||
}
|
||
|
||
if (ignore)
|
||
return false;
|
||
|
||
return gomp_affinity_init_level (level, count, false);
|
||
}
|
||
|
||
count = 0;
|
||
end = env;
|
||
do
|
||
{
|
||
bool negate;
|
||
unsigned long len;
|
||
long stride;
|
||
if (!parse_one_place (&end, &negate, &len, &stride))
|
||
goto invalid;
|
||
if (negate)
|
||
{
|
||
if (!any_negate)
|
||
count++;
|
||
any_negate = true;
|
||
}
|
||
else
|
||
count += len;
|
||
if (count > 65536)
|
||
goto invalid;
|
||
if (*end == '\0')
|
||
break;
|
||
if (*end != ',')
|
||
goto invalid;
|
||
end++;
|
||
}
|
||
while (1);
|
||
|
||
if (ignore)
|
||
return false;
|
||
|
||
gomp_places_list_len = 0;
|
||
gomp_places_list = gomp_affinity_alloc (count, false);
|
||
if (gomp_places_list == NULL)
|
||
return false;
|
||
|
||
do
|
||
{
|
||
bool negate;
|
||
unsigned long len;
|
||
long stride;
|
||
gomp_affinity_init_place (gomp_places_list[gomp_places_list_len]);
|
||
if (!parse_one_place (&env, &negate, &len, &stride))
|
||
goto invalid;
|
||
if (negate)
|
||
{
|
||
void *p;
|
||
for (count = 0; count < gomp_places_list_len; count++)
|
||
if (gomp_affinity_same_place
|
||
(gomp_places_list[count],
|
||
gomp_places_list[gomp_places_list_len]))
|
||
break;
|
||
if (count == gomp_places_list_len)
|
||
{
|
||
gomp_error ("Trying to remove a non-existing place from list "
|
||
"of places");
|
||
goto invalid;
|
||
}
|
||
p = gomp_places_list[count];
|
||
memmove (&gomp_places_list[count],
|
||
&gomp_places_list[count + 1],
|
||
(gomp_places_list_len - count - 1) * sizeof (void *));
|
||
--gomp_places_list_len;
|
||
gomp_places_list[gomp_places_list_len] = p;
|
||
}
|
||
else if (len == 1)
|
||
++gomp_places_list_len;
|
||
else
|
||
{
|
||
for (count = 0; count < len - 1; count++)
|
||
if (!gomp_affinity_copy_place
|
||
(gomp_places_list[gomp_places_list_len + count + 1],
|
||
gomp_places_list[gomp_places_list_len + count],
|
||
stride))
|
||
goto invalid;
|
||
gomp_places_list_len += len;
|
||
}
|
||
if (*env == '\0')
|
||
break;
|
||
env++;
|
||
}
|
||
while (1);
|
||
|
||
if (gomp_places_list_len == 0)
|
||
{
|
||
gomp_error ("All places have been removed");
|
||
goto invalid;
|
||
}
|
||
if (!gomp_affinity_finalize_place_list (false))
|
||
goto invalid;
|
||
return true;
|
||
|
||
invalid:
|
||
free (gomp_places_list);
|
||
gomp_places_list = NULL;
|
||
gomp_places_list_len = 0;
|
||
gomp_error ("Invalid value for environment variable %s", name);
|
||
return false;
|
||
}
|
||
|
||
/* Parse the OMP_STACKSIZE environment varible. Return true if one was
|
||
present and it was successfully parsed. */
|
||
|
||
static bool
|
||
parse_stacksize (const char *name, unsigned long *pvalue)
|
||
{
|
||
char *env, *end;
|
||
unsigned long value, shift = 10;
|
||
|
||
env = getenv (name);
|
||
if (env == NULL)
|
||
return false;
|
||
|
||
while (isspace ((unsigned char) *env))
|
||
++env;
|
||
if (*env == '\0')
|
||
goto invalid;
|
||
|
||
errno = 0;
|
||
value = strtoul (env, &end, 10);
|
||
if (errno)
|
||
goto invalid;
|
||
|
||
while (isspace ((unsigned char) *end))
|
||
++end;
|
||
if (*end != '\0')
|
||
{
|
||
switch (tolower ((unsigned char) *end))
|
||
{
|
||
case 'b':
|
||
shift = 0;
|
||
break;
|
||
case 'k':
|
||
break;
|
||
case 'm':
|
||
shift = 20;
|
||
break;
|
||
case 'g':
|
||
shift = 30;
|
||
break;
|
||
default:
|
||
goto invalid;
|
||
}
|
||
++end;
|
||
while (isspace ((unsigned char) *end))
|
||
++end;
|
||
if (*end != '\0')
|
||
goto invalid;
|
||
}
|
||
|
||
if (((value << shift) >> shift) != value)
|
||
goto invalid;
|
||
|
||
*pvalue = value << shift;
|
||
return true;
|
||
|
||
invalid:
|
||
gomp_error ("Invalid value for environment variable %s", name);
|
||
return false;
|
||
}
|
||
|
||
/* Parse the GOMP_SPINCOUNT environment varible. Return true if one was
|
||
present and it was successfully parsed. */
|
||
|
||
static bool
|
||
parse_spincount (const char *name, unsigned long long *pvalue)
|
||
{
|
||
char *env, *end;
|
||
unsigned long long value, mult = 1;
|
||
|
||
env = getenv (name);
|
||
if (env == NULL)
|
||
return false;
|
||
|
||
while (isspace ((unsigned char) *env))
|
||
++env;
|
||
if (*env == '\0')
|
||
goto invalid;
|
||
|
||
if (strncasecmp (env, "infinite", 8) == 0
|
||
|| strncasecmp (env, "infinity", 8) == 0)
|
||
{
|
||
value = ~0ULL;
|
||
end = env + 8;
|
||
goto check_tail;
|
||
}
|
||
|
||
errno = 0;
|
||
value = strtoull (env, &end, 10);
|
||
if (errno)
|
||
goto invalid;
|
||
|
||
while (isspace ((unsigned char) *end))
|
||
++end;
|
||
if (*end != '\0')
|
||
{
|
||
switch (tolower ((unsigned char) *end))
|
||
{
|
||
case 'k':
|
||
mult = 1000LL;
|
||
break;
|
||
case 'm':
|
||
mult = 1000LL * 1000LL;
|
||
break;
|
||
case 'g':
|
||
mult = 1000LL * 1000LL * 1000LL;
|
||
break;
|
||
case 't':
|
||
mult = 1000LL * 1000LL * 1000LL * 1000LL;
|
||
break;
|
||
default:
|
||
goto invalid;
|
||
}
|
||
++end;
|
||
check_tail:
|
||
while (isspace ((unsigned char) *end))
|
||
++end;
|
||
if (*end != '\0')
|
||
goto invalid;
|
||
}
|
||
|
||
if (value > ~0ULL / mult)
|
||
value = ~0ULL;
|
||
else
|
||
value *= mult;
|
||
|
||
*pvalue = value;
|
||
return true;
|
||
|
||
invalid:
|
||
gomp_error ("Invalid value for environment variable %s", name);
|
||
return false;
|
||
}
|
||
|
||
/* Parse a boolean value for environment variable NAME and store the
|
||
result in VALUE. */
|
||
|
||
static void
|
||
parse_boolean (const char *name, bool *value)
|
||
{
|
||
const char *env;
|
||
|
||
env = getenv (name);
|
||
if (env == NULL)
|
||
return;
|
||
|
||
while (isspace ((unsigned char) *env))
|
||
++env;
|
||
if (strncasecmp (env, "true", 4) == 0)
|
||
{
|
||
*value = true;
|
||
env += 4;
|
||
}
|
||
else if (strncasecmp (env, "false", 5) == 0)
|
||
{
|
||
*value = false;
|
||
env += 5;
|
||
}
|
||
else
|
||
env = "X";
|
||
while (isspace ((unsigned char) *env))
|
||
++env;
|
||
if (*env != '\0')
|
||
gomp_error ("Invalid value for environment variable %s", name);
|
||
}
|
||
|
||
/* Parse the OMP_WAIT_POLICY environment variable and store the
|
||
result in gomp_active_wait_policy. */
|
||
|
||
static int
|
||
parse_wait_policy (void)
|
||
{
|
||
const char *env;
|
||
int ret = -1;
|
||
|
||
env = getenv ("OMP_WAIT_POLICY");
|
||
if (env == NULL)
|
||
return -1;
|
||
|
||
while (isspace ((unsigned char) *env))
|
||
++env;
|
||
if (strncasecmp (env, "active", 6) == 0)
|
||
{
|
||
ret = 1;
|
||
env += 6;
|
||
}
|
||
else if (strncasecmp (env, "passive", 7) == 0)
|
||
{
|
||
ret = 0;
|
||
env += 7;
|
||
}
|
||
else
|
||
env = "X";
|
||
while (isspace ((unsigned char) *env))
|
||
++env;
|
||
if (*env == '\0')
|
||
return ret;
|
||
gomp_error ("Invalid value for environment variable OMP_WAIT_POLICY");
|
||
return -1;
|
||
}
|
||
|
||
/* Parse the GOMP_CPU_AFFINITY environment varible. Return true if one was
|
||
present and it was successfully parsed. */
|
||
|
||
static bool
|
||
parse_affinity (bool ignore)
|
||
{
|
||
char *env, *end, *start;
|
||
int pass;
|
||
unsigned long cpu_beg, cpu_end, cpu_stride;
|
||
size_t count = 0, needed;
|
||
|
||
env = getenv ("GOMP_CPU_AFFINITY");
|
||
if (env == NULL)
|
||
return false;
|
||
|
||
start = env;
|
||
for (pass = 0; pass < 2; pass++)
|
||
{
|
||
env = start;
|
||
if (pass == 1)
|
||
{
|
||
if (ignore)
|
||
return false;
|
||
|
||
gomp_places_list_len = 0;
|
||
gomp_places_list = gomp_affinity_alloc (count, true);
|
||
if (gomp_places_list == NULL)
|
||
return false;
|
||
}
|
||
do
|
||
{
|
||
while (isspace ((unsigned char) *env))
|
||
++env;
|
||
|
||
errno = 0;
|
||
cpu_beg = strtoul (env, &end, 0);
|
||
if (errno || cpu_beg >= 65536)
|
||
goto invalid;
|
||
cpu_end = cpu_beg;
|
||
cpu_stride = 1;
|
||
|
||
env = end;
|
||
if (*env == '-')
|
||
{
|
||
errno = 0;
|
||
cpu_end = strtoul (++env, &end, 0);
|
||
if (errno || cpu_end >= 65536 || cpu_end < cpu_beg)
|
||
goto invalid;
|
||
|
||
env = end;
|
||
if (*env == ':')
|
||
{
|
||
errno = 0;
|
||
cpu_stride = strtoul (++env, &end, 0);
|
||
if (errno || cpu_stride == 0 || cpu_stride >= 65536)
|
||
goto invalid;
|
||
|
||
env = end;
|
||
}
|
||
}
|
||
|
||
needed = (cpu_end - cpu_beg) / cpu_stride + 1;
|
||
if (pass == 0)
|
||
count += needed;
|
||
else
|
||
{
|
||
while (needed--)
|
||
{
|
||
void *p = gomp_places_list[gomp_places_list_len];
|
||
gomp_affinity_init_place (p);
|
||
if (gomp_affinity_add_cpus (p, cpu_beg, 1, 0, true))
|
||
++gomp_places_list_len;
|
||
cpu_beg += cpu_stride;
|
||
}
|
||
}
|
||
|
||
while (isspace ((unsigned char) *env))
|
||
++env;
|
||
|
||
if (*env == ',')
|
||
env++;
|
||
else if (*env == '\0')
|
||
break;
|
||
}
|
||
while (1);
|
||
}
|
||
|
||
if (gomp_places_list_len == 0)
|
||
{
|
||
free (gomp_places_list);
|
||
gomp_places_list = NULL;
|
||
return false;
|
||
}
|
||
return true;
|
||
|
||
invalid:
|
||
gomp_error ("Invalid value for enviroment variable GOMP_CPU_AFFINITY");
|
||
return false;
|
||
}
|
||
|
||
|
||
static void
|
||
handle_omp_display_env (unsigned long stacksize, int wait_policy)
|
||
{
|
||
const char *env;
|
||
bool display = false;
|
||
bool verbose = false;
|
||
int i;
|
||
|
||
env = getenv ("OMP_DISPLAY_ENV");
|
||
if (env == NULL)
|
||
return;
|
||
|
||
while (isspace ((unsigned char) *env))
|
||
++env;
|
||
if (strncasecmp (env, "true", 4) == 0)
|
||
{
|
||
display = true;
|
||
env += 4;
|
||
}
|
||
else if (strncasecmp (env, "false", 5) == 0)
|
||
{
|
||
display = false;
|
||
env += 5;
|
||
}
|
||
else if (strncasecmp (env, "verbose", 7) == 0)
|
||
{
|
||
display = true;
|
||
verbose = true;
|
||
env += 7;
|
||
}
|
||
else
|
||
env = "X";
|
||
while (isspace ((unsigned char) *env))
|
||
++env;
|
||
if (*env != '\0')
|
||
gomp_error ("Invalid value for environment variable OMP_DISPLAY_ENV");
|
||
|
||
if (!display)
|
||
return;
|
||
|
||
fputs ("\nOPENMP DISPLAY ENVIRONMENT BEGIN\n", stderr);
|
||
|
||
fputs (" _OPENMP = '201307'\n", stderr);
|
||
fprintf (stderr, " OMP_DYNAMIC = '%s'\n",
|
||
gomp_global_icv.dyn_var ? "TRUE" : "FALSE");
|
||
fprintf (stderr, " OMP_NESTED = '%s'\n",
|
||
gomp_global_icv.nest_var ? "TRUE" : "FALSE");
|
||
|
||
fprintf (stderr, " OMP_NUM_THREADS = '%lu", gomp_global_icv.nthreads_var);
|
||
for (i = 1; i < gomp_nthreads_var_list_len; i++)
|
||
fprintf (stderr, ",%lu", gomp_nthreads_var_list[i]);
|
||
fputs ("'\n", stderr);
|
||
|
||
fprintf (stderr, " OMP_SCHEDULE = '");
|
||
switch (gomp_global_icv.run_sched_var)
|
||
{
|
||
case GFS_RUNTIME:
|
||
fputs ("RUNTIME", stderr);
|
||
break;
|
||
case GFS_STATIC:
|
||
fputs ("STATIC", stderr);
|
||
break;
|
||
case GFS_DYNAMIC:
|
||
fputs ("DYNAMIC", stderr);
|
||
break;
|
||
case GFS_GUIDED:
|
||
fputs ("GUIDED", stderr);
|
||
break;
|
||
case GFS_AUTO:
|
||
fputs ("AUTO", stderr);
|
||
break;
|
||
}
|
||
fputs ("'\n", stderr);
|
||
|
||
fputs (" OMP_PROC_BIND = '", stderr);
|
||
switch (gomp_global_icv.bind_var)
|
||
{
|
||
case omp_proc_bind_false:
|
||
fputs ("FALSE", stderr);
|
||
break;
|
||
case omp_proc_bind_true:
|
||
fputs ("TRUE", stderr);
|
||
break;
|
||
case omp_proc_bind_master:
|
||
fputs ("MASTER", stderr);
|
||
break;
|
||
case omp_proc_bind_close:
|
||
fputs ("CLOSE", stderr);
|
||
break;
|
||
case omp_proc_bind_spread:
|
||
fputs ("SPREAD", stderr);
|
||
break;
|
||
}
|
||
for (i = 1; i < gomp_bind_var_list_len; i++)
|
||
switch (gomp_bind_var_list[i])
|
||
{
|
||
case omp_proc_bind_master:
|
||
fputs (",MASTER", stderr);
|
||
break;
|
||
case omp_proc_bind_close:
|
||
fputs (",CLOSE", stderr);
|
||
break;
|
||
case omp_proc_bind_spread:
|
||
fputs (",SPREAD", stderr);
|
||
break;
|
||
}
|
||
fputs ("'\n", stderr);
|
||
fputs (" OMP_PLACES = '", stderr);
|
||
for (i = 0; i < gomp_places_list_len; i++)
|
||
{
|
||
fputs ("{", stderr);
|
||
gomp_affinity_print_place (gomp_places_list[i]);
|
||
fputs (i + 1 == gomp_places_list_len ? "}" : "},", stderr);
|
||
}
|
||
fputs ("'\n", stderr);
|
||
|
||
fprintf (stderr, " OMP_STACKSIZE = '%lu'\n", stacksize);
|
||
|
||
/* GOMP's default value is actually neither active nor passive. */
|
||
fprintf (stderr, " OMP_WAIT_POLICY = '%s'\n",
|
||
wait_policy > 0 ? "ACTIVE" : "PASSIVE");
|
||
fprintf (stderr, " OMP_THREAD_LIMIT = '%u'\n",
|
||
gomp_global_icv.thread_limit_var);
|
||
fprintf (stderr, " OMP_MAX_ACTIVE_LEVELS = '%lu'\n",
|
||
gomp_max_active_levels_var);
|
||
|
||
fprintf (stderr, " OMP_CANCELLATION = '%s'\n",
|
||
gomp_cancel_var ? "TRUE" : "FALSE");
|
||
fprintf (stderr, " OMP_DEFAULT_DEVICE = '%d'\n",
|
||
gomp_global_icv.default_device_var);
|
||
|
||
if (verbose)
|
||
{
|
||
fputs (" GOMP_CPU_AFFINITY = ''\n", stderr);
|
||
fprintf (stderr, " GOMP_STACKSIZE = '%lu'\n", stacksize);
|
||
#ifdef HAVE_INTTYPES_H
|
||
fprintf (stderr, " GOMP_SPINCOUNT = '%"PRIu64"'\n",
|
||
(uint64_t) gomp_spin_count_var);
|
||
#else
|
||
fprintf (stderr, " GOMP_SPINCOUNT = '%lu'\n",
|
||
(unsigned long) gomp_spin_count_var);
|
||
#endif
|
||
}
|
||
|
||
fputs ("OPENMP DISPLAY ENVIRONMENT END\n", stderr);
|
||
}
|
||
|
||
|
||
static void __attribute__((constructor))
|
||
initialize_env (void)
|
||
{
|
||
unsigned long thread_limit_var, stacksize;
|
||
int wait_policy;
|
||
|
||
/* Do a compile time check that mkomp_h.pl did good job. */
|
||
omp_check_defines ();
|
||
|
||
parse_schedule ();
|
||
parse_boolean ("OMP_DYNAMIC", &gomp_global_icv.dyn_var);
|
||
parse_boolean ("OMP_NESTED", &gomp_global_icv.nest_var);
|
||
parse_boolean ("OMP_CANCELLATION", &gomp_cancel_var);
|
||
parse_int ("OMP_DEFAULT_DEVICE", &gomp_global_icv.default_device_var, true);
|
||
parse_unsigned_long ("OMP_MAX_ACTIVE_LEVELS", &gomp_max_active_levels_var,
|
||
true);
|
||
if (parse_unsigned_long ("OMP_THREAD_LIMIT", &thread_limit_var, false))
|
||
{
|
||
gomp_global_icv.thread_limit_var
|
||
= thread_limit_var > INT_MAX ? UINT_MAX : thread_limit_var;
|
||
}
|
||
#ifndef HAVE_SYNC_BUILTINS
|
||
gomp_mutex_init (&gomp_managed_threads_lock);
|
||
#endif
|
||
gomp_init_num_threads ();
|
||
gomp_available_cpus = gomp_global_icv.nthreads_var;
|
||
if (!parse_unsigned_long_list ("OMP_NUM_THREADS",
|
||
&gomp_global_icv.nthreads_var,
|
||
&gomp_nthreads_var_list,
|
||
&gomp_nthreads_var_list_len))
|
||
gomp_global_icv.nthreads_var = gomp_available_cpus;
|
||
bool ignore = false;
|
||
if (parse_bind_var ("OMP_PROC_BIND",
|
||
&gomp_global_icv.bind_var,
|
||
&gomp_bind_var_list,
|
||
&gomp_bind_var_list_len)
|
||
&& gomp_global_icv.bind_var == omp_proc_bind_false)
|
||
ignore = true;
|
||
/* Make sure OMP_PLACES and GOMP_CPU_AFFINITY env vars are always
|
||
parsed if present in the environment. If OMP_PROC_BIND was set
|
||
explictly to false, don't populate places list though. If places
|
||
list was successfully set from OMP_PLACES, only parse but don't process
|
||
GOMP_CPU_AFFINITY. If OMP_PROC_BIND was not set in the environment,
|
||
default to OMP_PROC_BIND=true if OMP_PLACES or GOMP_CPU_AFFINITY
|
||
was successfully parsed into a places list, otherwise to
|
||
OMP_PROC_BIND=false. */
|
||
if (parse_places_var ("OMP_PLACES", ignore))
|
||
{
|
||
if (gomp_global_icv.bind_var == omp_proc_bind_false)
|
||
gomp_global_icv.bind_var = true;
|
||
ignore = true;
|
||
}
|
||
if (parse_affinity (ignore))
|
||
{
|
||
if (gomp_global_icv.bind_var == omp_proc_bind_false)
|
||
gomp_global_icv.bind_var = true;
|
||
ignore = true;
|
||
}
|
||
if (gomp_global_icv.bind_var != omp_proc_bind_false)
|
||
gomp_init_affinity ();
|
||
wait_policy = parse_wait_policy ();
|
||
if (!parse_spincount ("GOMP_SPINCOUNT", &gomp_spin_count_var))
|
||
{
|
||
/* Using a rough estimation of 100000 spins per msec,
|
||
use 5 min blocking for OMP_WAIT_POLICY=active,
|
||
3 msec blocking when OMP_WAIT_POLICY is not specificed
|
||
and 0 when OMP_WAIT_POLICY=passive.
|
||
Depending on the CPU speed, this can be e.g. 5 times longer
|
||
or 5 times shorter. */
|
||
if (wait_policy > 0)
|
||
gomp_spin_count_var = 30000000000LL;
|
||
else if (wait_policy < 0)
|
||
gomp_spin_count_var = 300000LL;
|
||
}
|
||
/* gomp_throttled_spin_count_var is used when there are more libgomp
|
||
managed threads than available CPUs. Use very short spinning. */
|
||
if (wait_policy > 0)
|
||
gomp_throttled_spin_count_var = 1000LL;
|
||
else if (wait_policy < 0)
|
||
gomp_throttled_spin_count_var = 100LL;
|
||
if (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. */
|
||
pthread_attr_init (&gomp_thread_attr);
|
||
pthread_attr_setdetachstate (&gomp_thread_attr, PTHREAD_CREATE_DETACHED);
|
||
|
||
if (parse_stacksize ("OMP_STACKSIZE", &stacksize)
|
||
|| parse_stacksize ("GOMP_STACKSIZE", &stacksize))
|
||
{
|
||
int err;
|
||
|
||
err = pthread_attr_setstacksize (&gomp_thread_attr, stacksize);
|
||
|
||
#ifdef PTHREAD_STACK_MIN
|
||
if (err == EINVAL)
|
||
{
|
||
if (stacksize < PTHREAD_STACK_MIN)
|
||
gomp_error ("Stack size less than minimum of %luk",
|
||
PTHREAD_STACK_MIN / 1024ul
|
||
+ (PTHREAD_STACK_MIN % 1024 != 0));
|
||
else
|
||
gomp_error ("Stack size larger than system limit");
|
||
}
|
||
else
|
||
#endif
|
||
if (err != 0)
|
||
gomp_error ("Stack size change failed: %s", strerror (err));
|
||
}
|
||
|
||
handle_omp_display_env (stacksize, wait_policy);
|
||
}
|
||
|
||
|
||
/* The public OpenMP API routines that access these variables. */
|
||
|
||
void
|
||
omp_set_num_threads (int n)
|
||
{
|
||
struct gomp_task_icv *icv = gomp_icv (true);
|
||
icv->nthreads_var = (n > 0 ? n : 1);
|
||
}
|
||
|
||
void
|
||
omp_set_dynamic (int val)
|
||
{
|
||
struct gomp_task_icv *icv = gomp_icv (true);
|
||
icv->dyn_var = val;
|
||
}
|
||
|
||
int
|
||
omp_get_dynamic (void)
|
||
{
|
||
struct gomp_task_icv *icv = gomp_icv (false);
|
||
return icv->dyn_var;
|
||
}
|
||
|
||
void
|
||
omp_set_nested (int val)
|
||
{
|
||
struct gomp_task_icv *icv = gomp_icv (true);
|
||
icv->nest_var = val;
|
||
}
|
||
|
||
int
|
||
omp_get_nested (void)
|
||
{
|
||
struct gomp_task_icv *icv = gomp_icv (false);
|
||
return icv->nest_var;
|
||
}
|
||
|
||
void
|
||
omp_set_schedule (omp_sched_t kind, int modifier)
|
||
{
|
||
struct gomp_task_icv *icv = gomp_icv (true);
|
||
switch (kind)
|
||
{
|
||
case omp_sched_static:
|
||
if (modifier < 1)
|
||
modifier = 0;
|
||
icv->run_sched_modifier = modifier;
|
||
break;
|
||
case omp_sched_dynamic:
|
||
case omp_sched_guided:
|
||
if (modifier < 1)
|
||
modifier = 1;
|
||
icv->run_sched_modifier = modifier;
|
||
break;
|
||
case omp_sched_auto:
|
||
break;
|
||
default:
|
||
return;
|
||
}
|
||
icv->run_sched_var = kind;
|
||
}
|
||
|
||
void
|
||
omp_get_schedule (omp_sched_t *kind, int *modifier)
|
||
{
|
||
struct gomp_task_icv *icv = gomp_icv (false);
|
||
*kind = icv->run_sched_var;
|
||
*modifier = icv->run_sched_modifier;
|
||
}
|
||
|
||
int
|
||
omp_get_max_threads (void)
|
||
{
|
||
struct gomp_task_icv *icv = gomp_icv (false);
|
||
return icv->nthreads_var;
|
||
}
|
||
|
||
int
|
||
omp_get_thread_limit (void)
|
||
{
|
||
struct gomp_task_icv *icv = gomp_icv (false);
|
||
return icv->thread_limit_var > INT_MAX ? INT_MAX : icv->thread_limit_var;
|
||
}
|
||
|
||
void
|
||
omp_set_max_active_levels (int max_levels)
|
||
{
|
||
if (max_levels >= 0)
|
||
gomp_max_active_levels_var = max_levels;
|
||
}
|
||
|
||
int
|
||
omp_get_max_active_levels (void)
|
||
{
|
||
return gomp_max_active_levels_var;
|
||
}
|
||
|
||
int
|
||
omp_get_cancellation (void)
|
||
{
|
||
return gomp_cancel_var;
|
||
}
|
||
|
||
omp_proc_bind_t
|
||
omp_get_proc_bind (void)
|
||
{
|
||
struct gomp_task_icv *icv = gomp_icv (false);
|
||
return icv->bind_var;
|
||
}
|
||
|
||
void
|
||
omp_set_default_device (int device_num)
|
||
{
|
||
struct gomp_task_icv *icv = gomp_icv (true);
|
||
icv->default_device_var = device_num >= 0 ? device_num : 0;
|
||
}
|
||
|
||
int
|
||
omp_get_default_device (void)
|
||
{
|
||
struct gomp_task_icv *icv = gomp_icv (false);
|
||
return icv->default_device_var;
|
||
}
|
||
|
||
int
|
||
omp_get_num_devices (void)
|
||
{
|
||
return gomp_get_num_devices ();
|
||
}
|
||
|
||
int
|
||
omp_get_num_teams (void)
|
||
{
|
||
/* Hardcoded to 1 on host, MIC, HSAIL? Maybe variable on PTX. */
|
||
return 1;
|
||
}
|
||
|
||
int
|
||
omp_get_team_num (void)
|
||
{
|
||
/* Hardcoded to 0 on host, MIC, HSAIL? Maybe variable on PTX. */
|
||
return 0;
|
||
}
|
||
|
||
int
|
||
omp_is_initial_device (void)
|
||
{
|
||
/* Hardcoded to 1 on host, should be 0 on MIC, HSAIL, PTX. */
|
||
return 1;
|
||
}
|
||
|
||
ialias (omp_set_dynamic)
|
||
ialias (omp_set_nested)
|
||
ialias (omp_set_num_threads)
|
||
ialias (omp_get_dynamic)
|
||
ialias (omp_get_nested)
|
||
ialias (omp_set_schedule)
|
||
ialias (omp_get_schedule)
|
||
ialias (omp_get_max_threads)
|
||
ialias (omp_get_thread_limit)
|
||
ialias (omp_set_max_active_levels)
|
||
ialias (omp_get_max_active_levels)
|
||
ialias (omp_get_cancellation)
|
||
ialias (omp_get_proc_bind)
|
||
ialias (omp_set_default_device)
|
||
ialias (omp_get_default_device)
|
||
ialias (omp_get_num_devices)
|
||
ialias (omp_get_num_teams)
|
||
ialias (omp_get_team_num)
|
||
ialias (omp_is_initial_device)
|