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Refs #112. Improved setting thread affinity in Linux. Remove the limit (64) about the number of CPU cores.

This commit is contained in:
Xianyi Zhang 2012-05-29 14:01:50 +08:00
parent 5199809bba
commit a6adbb299d
1 changed files with 167 additions and 72 deletions
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239
driver/others/init.c
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@ -1,5 +1,5 @@
/***************************************************************************** /*****************************************************************************
Copyright (c) 2011, Lab of Parallel Software and Computational Science,ICSAS Copyright (c) 2011,2012 Lab of Parallel Software and Computational Science,ISCAS
All rights reserved. All rights reserved.
Redistribution and use in source and binary forms, with or without Redistribution and use in source and binary forms, with or without
@ -85,6 +85,11 @@ USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#define MAX_NODES 16 #define MAX_NODES 16
#define MAX_CPUS 256 #define MAX_CPUS 256
#define NCPUBITS (8*sizeof(unsigned long))
#define MAX_BITMASK_LEN (MAX_CPUS/NCPUBITS)
#define CPUELT(cpu) ((cpu) / NCPUBITS)
#define CPUMASK(cpu) ((unsigned long) 1UL << ((cpu) % NCPUBITS))
#define SH_MAGIC 0x510510 #define SH_MAGIC 0x510510
@ -103,10 +108,10 @@ typedef struct {
int num_nodes; int num_nodes;
int num_procs; int num_procs;
int final_num_procs; int final_num_procs;
unsigned long avail; unsigned long avail [MAX_BITMASK_LEN];
int avail_count;
unsigned long cpu_info [MAX_CPUS]; unsigned long cpu_info [MAX_CPUS];
unsigned long node_info [MAX_NODES]; unsigned long node_info [MAX_NODES][MAX_BITMASK_LEN];
int cpu_use[MAX_CPUS]; int cpu_use[MAX_CPUS];
} shm_t; } shm_t;
@ -126,7 +131,8 @@ static shm_t *common = (void *)-1;
static int shmid, pshmid; static int shmid, pshmid;
static void *paddr; static void *paddr;
static unsigned long lprocmask, lnodemask; static unsigned long lprocmask[MAX_BITMASK_LEN], lnodemask;
static int lprocmask_count = 0;
static int numprocs = 1; static int numprocs = 1;
static int numnodes = 1; static int numnodes = 1;
@ -177,70 +183,114 @@ static inline int rcount(unsigned long number) {
than sizeof(unsigned long). On 64 bits, the limit than sizeof(unsigned long). On 64 bits, the limit
is 64. On 32 bits, it is 32. is 64. On 32 bits, it is 32.
***/ ***/
static inline unsigned long get_cpumap(int node) { static inline void get_cpumap(int node, unsigned long * node_info) {
int infile; int infile;
unsigned long affinity; unsigned long affinity[32];
char name[160]; char name[160];
char cpumap[160]; char cpumap[160];
char *p, *dummy; char *dummy;
int i=0; int i=0;
int count=0;
int k=0;
sprintf(name, CPUMAP_NAME, node); sprintf(name, CPUMAP_NAME, node);
infile = open(name, O_RDONLY); infile = open(name, O_RDONLY);
for(i=0; i<32; i++){
affinity[i] = 0;
}
affinity = 0;
if (infile != -1) { if (infile != -1) {
read(infile, cpumap, sizeof(cpumap)); read(infile, cpumap, sizeof(cpumap));
p = cpumap;
while (*p != '\n' && i<160){ for(i=0; i<160; i++){
if(*p != ',') { if(cpumap[i] == '\n')
name[i++]=*p; break;
if(cpumap[i] != ','){
name[k++]=cpumap[i];
//Enough data for Hex
if(k >= NCPUBITS/4){
affinity[count++] = strtoul(name, &dummy, 16);
k=0;
}
} }
p++;
}
if(k!=0){
name[k]='\0';
affinity[count++] = strtoul(name, &dummy, 16);
k=0;
}
// 0-63bit -> node_info[0], 64-128bit -> node_info[1] ....
// revert the sequence
for(i=0; i<count && i<MAX_BITMASK_LEN; i++){
node_info[i]=affinity[count-i-1];
} }
p = name;
// while ((*p == '0') || (*p == ',')) p++;
affinity = strtoul(p, &dummy, 16);
close(infile); close(infile);
} }
return affinity; return ;
} }
static inline unsigned long get_share(int cpu, int level) { static inline void get_share(int cpu, int level, unsigned long * share) {
int infile; int infile;
unsigned long affinity; unsigned long affinity[32];
char cpumap[160];
char name[160]; char name[160];
char *p; char *dummy;
int count=0;
int i=0,k=0;
int bitmask_idx = 0;
sprintf(name, SHARE_NAME, cpu, level); sprintf(name, SHARE_NAME, cpu, level);
infile = open(name, O_RDONLY); infile = open(name, O_RDONLY);
affinity = (1UL << cpu); // Init share
for(i=0; i<MAX_BITMASK_LEN; i++){
share[i]=0;
}
bitmask_idx = CPUELT(cpu);
share[bitmask_idx] = CPUMASK(cpu);
if (infile != -1) { if (infile != -1) {
read(infile, name, sizeof(name)); read(infile, cpumap, sizeof(cpumap));
for(i=0; i<160; i++){
if(cpumap[i] == '\n')
break;
if(cpumap[i] != ','){
name[k++]=cpumap[i];
//Enough data
if(k >= NCPUBITS/4){
affinity[count++] = strtoul(name, &dummy, 16);
k=0;
}
}
}
if(k!=0){
name[k]='\0';
affinity[count++] = strtoul(name, &dummy, 16);
k=0;
}
// 0-63bit -> node_info[0], 64-128bit -> node_info[1] ....
// revert the sequence
for(i=0; i<count && i<MAX_BITMASK_LEN; i++){
share[i]=affinity[count-i-1];
}
p = name;
while ((*p == '0') || (*p == ',')) p++;
affinity = strtol(p, &p, 16);
close(infile); close(infile);
} }
return affinity; return ;
} }
static int numa_check(void) { static int numa_check(void) {
@ -248,6 +298,7 @@ static int numa_check(void) {
DIR *dp; DIR *dp;
struct dirent *dir; struct dirent *dir;
int node; int node;
int j;
common -> num_nodes = 0; common -> num_nodes = 0;
@ -258,7 +309,9 @@ static int numa_check(void) {
return 0; return 0;
} }
for (node = 0; node < MAX_NODES; node ++) common -> node_info[node] = 0; for (node = 0; node < MAX_NODES; node ++) {
for (j = 0; j<MAX_BITMASK_LEN; j++) common -> node_info[node][j] = 0;
}
while ((dir = readdir(dp)) != NULL) { while ((dir = readdir(dp)) != NULL) {
if (*(unsigned int *) dir -> d_name == 0x065646f6eU) { if (*(unsigned int *) dir -> d_name == 0x065646f6eU) {
@ -266,12 +319,12 @@ static int numa_check(void) {
node = atoi(&dir -> d_name[4]); node = atoi(&dir -> d_name[4]);
if (node > MAX_NODES) { if (node > MAX_NODES) {
fprintf(stderr, "\nGotoBLAS Warining : MAX_NODES (NUMA) is too small. Terminated.\n"); fprintf(stderr, "\nOpenBLAS Warning : MAX_NODES (NUMA) is too small. Terminated.\n");
exit(1); exit(1);
} }
common -> num_nodes ++; common -> num_nodes ++;
common -> node_info[node] = get_cpumap(node); get_cpumap(node, common->node_info[node]);
} }
} }
@ -284,7 +337,7 @@ static int numa_check(void) {
fprintf(stderr, "Numa found : number of Nodes = %2d\n", common -> num_nodes); fprintf(stderr, "Numa found : number of Nodes = %2d\n", common -> num_nodes);
for (node = 0; node < common -> num_nodes; node ++) for (node = 0; node < common -> num_nodes; node ++)
fprintf(stderr, "MASK (%2d) : %08lx\n", node, common -> node_info[node]); fprintf(stderr, "MASK (%2d) : %08lx\n", node, common -> node_info[node][0]);
#endif #endif
return common -> num_nodes; return common -> num_nodes;
@ -296,11 +349,13 @@ static void numa_mapping(void) {
int i, j, h; int i, j, h;
unsigned long work, bit; unsigned long work, bit;
int count = 0; int count = 0;
int bitmask_idx = 0;
for (node = 0; node < common -> num_nodes; node ++) { for (node = 0; node < common -> num_nodes; node ++) {
core = 0; core = 0;
for (cpu = 0; cpu < common -> num_procs; cpu ++) { for (cpu = 0; cpu < common -> num_procs; cpu ++) {
if (common -> node_info[node] & common -> avail & (1UL << cpu)) { bitmask_idx = CPUELT(cpu);
if (common -> node_info[node][bitmask_idx] & common -> avail[bitmask_idx] & CPUMASK(cpu)) {
common -> cpu_info[count] = WRITE_CORE(core) | WRITE_NODE(node) | WRITE_CPU(cpu); common -> cpu_info[count] = WRITE_CORE(core) | WRITE_NODE(node) | WRITE_CPU(cpu);
count ++; count ++;
core ++; core ++;
@ -357,58 +412,89 @@ static void numa_mapping(void) {
static void disable_hyperthread(void) { static void disable_hyperthread(void) {
unsigned long share; unsigned long share[MAX_BITMASK_LEN];
int cpu; int cpu;
int bitmask_idx = 0;
int i=0, count=0;
bitmask_idx = CPUELT(common -> num_procs);
if(common->num_procs > 64){ for(i=0; i< bitmask_idx; i++){
fprintf(stderr, "\nOpenBLAS Warining : The number of CPU/Cores(%d) is beyond the limit(64). Terminated.\n", common->num_procs); common -> avail[count++] = 0xFFFFFFFFFFFFFFFFUL;
exit(1); }
}else if(common->num_procs == 64){ if(CPUMASK(common -> num_procs) != 1){
common -> avail = 0xFFFFFFFFFFFFFFFFUL; common -> avail[count++] = CPUMASK(common -> num_procs) - 1;
}else }
common -> avail = (1UL << common -> num_procs) - 1; common -> avail_count = count;
/* if(common->num_procs > 64){ */
/* fprintf(stderr, "\nOpenBLAS Warning : The number of CPU/Cores(%d) is beyond the limit(64). Terminated.\n", common->num_procs); */
/* exit(1); */
/* }else if(common->num_procs == 64){ */
/* common -> avail = 0xFFFFFFFFFFFFFFFFUL; */
/* }else */
/* common -> avail = (1UL << common -> num_procs) - 1; */
#ifdef DEBUG #ifdef DEBUG
fprintf(stderr, "\nAvail CPUs : %04lx.\n", common -> avail); fprintf(stderr, "\nAvail CPUs : ");
for(i=0; i<count; i++)
fprintf(stderr, "%04lx ", common -> avail[i]);
fprintf(stderr, ".\n");
#endif #endif
for (cpu = 0; cpu < common -> num_procs; cpu ++) { for (cpu = 0; cpu < common -> num_procs; cpu ++) {
share = (get_share(cpu, 1) & common -> avail); get_share(cpu, 1, share);
if (popcount(share) > 1) { //When the shared cpu are in different element of share & avail array, this may be a bug.
for (i = 0; i < count ; i++){
if (popcount(share[i]) > 1) {
#ifdef DEBUG #ifdef DEBUG
fprintf(stderr, "Detected Hyper Threading on CPU %4x; disabled CPU %04lx.\n", fprintf(stderr, "Detected Hyper Threading on CPU %4x; disabled CPU %04lx.\n",
cpu, share & ~(1UL << cpu)); cpu, share[i] & ~(CPUMASK(cpu)));
#endif #endif
common -> avail &= ~((share & ~(1UL << cpu))); common -> avail[i] &= ~((share[i] & ~ CPUMASK(cpu)));
}
} }
} }
} }
static void disable_affinity(void) { static void disable_affinity(void) {
int i=0;
int bitmask_idx=0;
int count=0;
#ifdef DEBUG #ifdef DEBUG
fprintf(stderr, "Final all available CPUs : %04lx.\n\n", common -> avail); fprintf(stderr, "Final all available CPUs : %04lx.\n\n", common -> avail[0]);
fprintf(stderr, "CPU mask : %04lx.\n\n", *(unsigned long *)&cpu_orig_mask[0]); fprintf(stderr, "CPU mask : %04lx.\n\n", *(unsigned long *)&cpu_orig_mask[0]);
#endif #endif
if(common->final_num_procs > 64){ /* if(common->final_num_procs > 64){ */
fprintf(stderr, "\nOpenBLAS Warining : The number of CPU/Cores(%d) is beyond the limit(64). Terminated.\n", common->final_num_procs); /* fprintf(stderr, "\nOpenBLAS Warining : The number of CPU/Cores(%d) is beyond the limit(64). Terminated.\n", common->final_num_procs); */
exit(1); /* exit(1); */
}else if(common->final_num_procs == 64){ /* }else if(common->final_num_procs == 64){ */
lprocmask = 0xFFFFFFFFFFFFFFFFUL; /* lprocmask = 0xFFFFFFFFFFFFFFFFUL; */
}else /* }else */
lprocmask = (1UL << common -> final_num_procs) - 1; /* lprocmask = (1UL << common -> final_num_procs) - 1; */
bitmask_idx = CPUELT(common -> final_num_procs);
for(i=0; i< bitmask_idx; i++){
lprocmask[count++] = 0xFFFFFFFFFFFFFFFFUL;
}
if(CPUMASK(common -> final_num_procs) != 1){
lprocmask[count++] = CPUMASK(common -> final_num_procs) - 1;
}
lprocmask_count = count;
#ifndef USE_OPENMP #ifndef USE_OPENMP
lprocmask &= *(unsigned long *)&cpu_orig_mask[0]; for(i=0; i< count; i++){
lprocmask[i] &= ((unsigned long *)&cpu_orig_mask[0])[i];
}
#endif #endif
#ifdef DEBUG #ifdef DEBUG
fprintf(stderr, "I choose these CPUs : %04lx.\n\n", lprocmask); fprintf(stderr, "I choose these CPUs : %04lx.\n\n", lprocmask[0]);
#endif #endif
} }
@ -498,7 +584,7 @@ static void create_pshmem(void) {
static void local_cpu_map(void) { static void local_cpu_map(void) {
int cpu, id, mapping; int cpu, id, mapping;
int bitmask_idx = 0;
cpu = 0; cpu = 0;
mapping = 0; mapping = 0;
@ -508,8 +594,9 @@ static void local_cpu_map(void) {
if (id > 0) { if (id > 0) {
if (is_dead(id)) common -> cpu_use[cpu] = 0; if (is_dead(id)) common -> cpu_use[cpu] = 0;
} }
if ((common -> cpu_use[cpu] == 0) && (lprocmask & (1UL << cpu))) { bitmask_idx = CPUELT(cpu);
if ((common -> cpu_use[cpu] == 0) && (lprocmask[bitmask_idx] & CPUMASK(cpu))) {
common -> cpu_use[cpu] = pshmid; common -> cpu_use[cpu] = pshmid;
cpu_mapping[mapping] = READ_CPU(common -> cpu_info[cpu]); cpu_mapping[mapping] = READ_CPU(common -> cpu_info[cpu]);
@ -595,6 +682,7 @@ void gotoblas_affinity_init(void) {
#ifndef USE_OPENMP #ifndef USE_OPENMP
cpu_set_t cpu_mask; cpu_set_t cpu_mask;
#endif #endif
int i;
if (initialized) return; if (initialized) return;
@ -646,6 +734,11 @@ void gotoblas_affinity_init(void) {
common -> num_procs = get_nprocs(); common -> num_procs = get_nprocs();
if(common -> num_procs > MAX_CPUS) {
fprintf(stderr, "\nOpenBLAS Warining : The number of CPU/Cores(%d) is beyond the limit(%d). Terminated.\n", common->num_procs, MAX_CPUS);
exit(1);
}
for (cpu = 0; cpu < common -> num_procs; cpu++) common -> cpu_info[cpu] = cpu; for (cpu = 0; cpu < common -> num_procs; cpu++) common -> cpu_info[cpu] = cpu;
numa_check(); numa_check();
@ -654,7 +747,8 @@ void gotoblas_affinity_init(void) {
if (common -> num_nodes > 1) numa_mapping(); if (common -> num_nodes > 1) numa_mapping();
common -> final_num_procs = popcount(common -> avail); common -> final_num_procs = 0;
for(i = 0; i < common -> avail_count; i++) common -> final_num_procs += popcount(common -> avail[i]);
for (cpu = 0; cpu < common -> final_num_procs; cpu ++) common -> cpu_use[cpu] = 0; for (cpu = 0; cpu < common -> final_num_procs; cpu ++) common -> cpu_use[cpu] = 0;
@ -664,7 +758,8 @@ void gotoblas_affinity_init(void) {
disable_affinity(); disable_affinity();
num_avail = popcount(lprocmask); num_avail = 0;
for(i=0; i<lprocmask_count; i++) num_avail += popcount(lprocmask[i]);
if ((numprocs <= 0) || (numprocs > num_avail)) numprocs = num_avail; if ((numprocs <= 0) || (numprocs > num_avail)) numprocs = num_avail;