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OpenBLAS/driver/others/memory_qalloc.c

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/*********************************************************************/
/* Copyright 2009, 2010 The University of Texas at Austin. */
/* All rights reserved. */
/* */
/* Redistribution and use in source and binary forms, with or */
/* without modification, are permitted provided that the following */
/* conditions are met: */
/* */
/* 1. Redistributions of source code must retain the above */
/* copyright notice, this list of conditions and the following */
/* disclaimer. */
/* */
/* 2. Redistributions in binary form must reproduce the above */
/* copyright notice, this list of conditions and the following */
/* disclaimer in the documentation and/or other materials */
/* provided with the distribution. */
/* */
/* THIS SOFTWARE IS PROVIDED BY THE UNIVERSITY OF TEXAS AT */
/* AUSTIN ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, */
/* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF */
/* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE */
/* DISCLAIMED. IN NO EVENT SHALL THE UNIVERSITY OF TEXAS AT */
/* AUSTIN OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, */
/* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES */
/* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE */
/* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR */
/* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF */
/* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT */
/* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT */
/* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE */
/* POSSIBILITY OF SUCH DAMAGE. */
/* */
/* The views and conclusions contained in the software and */
/* documentation are those of the authors and should not be */
/* interpreted as representing official policies, either expressed */
/* or implied, of The University of Texas at Austin. */
/*********************************************************************/
#include <stdio.h>
#include "common.h"
#ifdef OS_LINUX
#include <sys/sysinfo.h>
#include <sched.h>
#include <errno.h>
#include <linux/unistd.h>
#include <sys/syscall.h>
#include <sys/time.h>
#include <sys/resource.h>
#endif
#ifdef OS_HAIKU
#include <unistd.h>
#endif
#if defined(OS_FREEBSD) || defined(OS_OPENBSD) || defined(OS_NETBSD) || defined(OS_DRAGONFLY) || defined(OS_DARWIN)
#include <sys/sysctl.h>
#include <sys/resource.h>
#endif
#define FIXED_PAGESIZE 4096
void *sa = NULL;
void *sb = NULL;
static double static_buffer[BUFFER_SIZE/sizeof(double)];
void *blas_memory_alloc(int numproc){
if (sa == NULL){
#if 0
sa = (void *)qalloc(QFAST, BUFFER_SIZE);
#else
sa = (void *)malloc(BUFFER_SIZE);
#endif
sb = (void *)&static_buffer[0];
}
return sa;
}
void blas_memory_free(void *free_area){
return;
}
extern void openblas_warning(int verbose, const char * msg);
#ifndef SMP
#define blas_cpu_number 1
#define blas_num_threads 1
/* Dummy Function */
int goto_get_num_procs (void) { return 1;};
void goto_set_num_threads(int num_threads) {};
#else
#if defined(OS_LINUX) || defined(OS_SUNOS)
#ifndef NO_AFFINITY
int get_num_procs(void);
#else
int get_num_procs(void) {
static int nums = 0;
cpu_set_t cpuset,*cpusetp;
size_t size;
int ret;
#if defined(__GLIBC_PREREQ)
#if !__GLIBC_PREREQ(2, 7)
int i;
#if !__GLIBC_PREREQ(2, 6)
int n;
#endif
#endif
#endif
if (!nums) nums = sysconf(_SC_NPROCESSORS_CONF);
#if !defined(OS_LINUX)
return nums;
#endif
/*
#if !defined(__GLIBC_PREREQ)
return nums;
#else
#if !__GLIBC_PREREQ(2, 3)
return nums;
#endif
#if !__GLIBC_PREREQ(2, 7)
ret = sched_getaffinity(0,sizeof(cpuset), &cpuset);
if (ret!=0) return nums;
n=0;
#if !__GLIBC_PREREQ(2, 6)
for (i=0;i<nums;i++)
if (CPU_ISSET(i,&cpuset)) n++;
nums=n;
#else
nums = CPU_COUNT(sizeof(cpuset),&cpuset);
#endif
return nums;
#else
if (nums >= CPU_SETSIZE) {
cpusetp = CPU_ALLOC(nums);
if (cpusetp == NULL) {
return nums;
}
size = CPU_ALLOC_SIZE(nums);
ret = sched_getaffinity(0,size,cpusetp);
if (ret!=0) {
CPU_FREE(cpusetp);
return nums;
}
ret = CPU_COUNT_S(size,cpusetp);
if (ret > 0 && ret < nums) nums = ret;
CPU_FREE(cpusetp);
return nums;
} else {
ret = sched_getaffinity(0,sizeof(cpuset),&cpuset);
if (ret!=0) {
return nums;
}
ret = CPU_COUNT(&cpuset);
if (ret > 0 && ret < nums) nums = ret;
return nums;
}
#endif
#endif
*/
return 1;
}
#endif
#endif
#ifdef OS_ANDROID
int get_num_procs(void) {
static int nums = 0;
if (!nums) nums = sysconf(_SC_NPROCESSORS_CONF);
return nums;
}
#endif
#ifdef OS_HAIKU
int get_num_procs(void) {
static int nums = 0;
if (!nums) nums = sysconf(_SC_NPROCESSORS_CONF);
return nums;
}
#endif
#ifdef OS_AIX
int get_num_procs(void) {
static int nums = 0;
if (!nums) nums = sysconf(_SC_NPROCESSORS_CONF);
return nums;
}
#endif
#ifdef OS_WINDOWS
int get_num_procs(void) {
static int nums = 0;
if (nums == 0) {
SYSTEM_INFO sysinfo;
GetSystemInfo(&sysinfo);
nums = sysinfo.dwNumberOfProcessors;
}
return nums;
}
#endif
#if defined(OS_FREEBSD) || defined(OS_OPENBSD) || defined(OS_NETBSD) || defined(OS_DRAGONFLY)
int get_num_procs(void) {
static int nums = 0;
int m[2];
size_t len;
if (nums == 0) {
m[0] = CTL_HW;
m[1] = HW_NCPU;
len = sizeof(int);
sysctl(m, 2, &nums, &len, NULL, 0);
}
return nums;
}
#endif
#if defined(OS_DARWIN)
int get_num_procs(void) {
static int nums = 0;
size_t len;
if (nums == 0){
len = sizeof(int);
sysctlbyname("hw.physicalcpu", &nums, &len, NULL, 0);
}
return nums;
}
/*
void set_stack_limit(int limitMB){
int result=0;
struct rlimit rl;
rlim_t StackSize;
StackSize=limitMB*1024*1024;
result=getrlimit(RLIMIT_STACK, &rl);
if(result==0){
if(rl.rlim_cur < StackSize){
rl.rlim_cur=StackSize;
result=setrlimit(RLIMIT_STACK, &rl);
if(result !=0){
fprintf(stderr, "OpenBLAS: set stack limit error =%d\n", result);
}
}
}
}
*/
#endif
/*
OpenBLAS uses the numbers of CPU cores in multithreading.
It can be set by openblas_set_num_threads(int num_threads);
*/
int blas_cpu_number = 0;
/*
The numbers of threads in the thread pool.
This value is equal or large than blas_cpu_number. This means some threads are sleep.
*/
int blas_num_threads = 0;
int blas_num_threads_set = 0;
int goto_get_num_procs (void) {
return blas_cpu_number;
}
void openblas_fork_handler()
{
// This handler shuts down the OpenBLAS-managed PTHREAD pool when OpenBLAS is
// built with "make USE_OPENMP=0".
// Hanging can still happen when OpenBLAS is built against the libgomp
// implementation of OpenMP. The problem is tracked at:
// http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60035
// In the mean time build with USE_OPENMP=0 or link against another
// implementation of OpenMP.
#if !((defined(OS_WINDOWS) && !defined(OS_CYGWIN_NT)) || defined(OS_ANDROID)) && defined(SMP_SERVER)
int err;
err = pthread_atfork ((void (*)(void)) BLASFUNC(blas_thread_shutdown), NULL, NULL);
if(err != 0)
openblas_warning(0, "OpenBLAS Warning ... cannot install fork handler. You may meet hang after fork.\n");
#endif
}
extern int openblas_num_threads_env();
extern int openblas_goto_num_threads_env();
extern int openblas_omp_num_threads_env();
int blas_get_cpu_number(void){
#if defined(OS_LINUX) || defined(OS_WINDOWS) || defined(OS_FREEBSD) || defined(OS_OPENBSD) || defined(OS_NETBSD) || defined(OS_DRAGONFLY) || defined(OS_DARWIN) || defined(OS_ANDROID)
int max_num;
#endif
int blas_goto_num = 0;
int blas_omp_num = 0;
if (blas_num_threads) return blas_num_threads;
#if defined(OS_LINUX) || defined(OS_WINDOWS) || defined(OS_FREEBSD) || defined(OS_OPENBSD) || defined(OS_NETBSD) || defined(OS_DRAGONFLY) || defined(OS_DARWIN) || defined(OS_ANDROID)
max_num = get_num_procs();
#endif
// blas_goto_num = 0;
#ifndef USE_OPENMP
blas_goto_num=openblas_num_threads_env();
if (blas_goto_num < 0) blas_goto_num = 0;
if (blas_goto_num == 0) {
blas_goto_num=openblas_goto_num_threads_env();
if (blas_goto_num < 0) blas_goto_num = 0;
}
#endif
// blas_omp_num = 0;
blas_omp_num=openblas_omp_num_threads_env();
if (blas_omp_num < 0) blas_omp_num = 0;
if (blas_goto_num > 0) blas_num_threads = blas_goto_num;
else if (blas_omp_num > 0) blas_num_threads = blas_omp_num;
else blas_num_threads = MAX_CPU_NUMBER;
#if defined(OS_LINUX) || defined(OS_WINDOWS) || defined(OS_FREEBSD) || defined(OS_OPENBSD) || defined(OS_NETBSD) || defined(OS_DRAGONFLY) || defined(OS_DARWIN) || defined(OS_ANDROID)
if (blas_num_threads > max_num) blas_num_threads = max_num;
#endif
if (blas_num_threads > MAX_CPU_NUMBER) blas_num_threads = MAX_CPU_NUMBER;
#ifdef DEBUG
printf( "Adjusted number of threads : %3d\n", blas_num_threads);
#endif
blas_cpu_number = blas_num_threads;
return blas_num_threads;
}
#endif
int openblas_get_num_procs(void) {
#ifndef SMP
return 1;
#else
return get_num_procs();
#endif
}
int openblas_get_num_threads(void) {
#ifndef SMP
return 1;
#else
// init blas_cpu_number if needed
blas_get_cpu_number();
return blas_cpu_number;
#endif
}
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