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cpu-affinity: linux thread affinity was not set correctly

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This commit is contained in:
Tanguy Pruvot 2015-01-23 04:59:19 +01:00
parent 833238cae5
commit bba2df56d5
1 changed files with 59 additions and 46 deletions
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105
ccminer.cpp
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@ -66,40 +66,6 @@ int cuda_finddevice(char *name);
nvml_handle *hnvml = NULL;
#endif
#ifdef __linux /* Linux specific policy and affinity management */
#include <sched.h>
static inline void drop_policy(void) {
struct sched_param param;
param.sched_priority = 0;
#ifdef SCHED_IDLE
if (unlikely(sched_setscheduler(0, SCHED_IDLE, &param) == -1))
#endif
#ifdef SCHED_BATCH
sched_setscheduler(0, SCHED_BATCH, &param);
#endif
}
static inline void affine_to_cpu(int id, int cpu) {
cpu_set_t set;
CPU_ZERO(&set);
CPU_SET(cpu, &set);
sched_setaffinity(0, sizeof(&set), &set);
}
#elif defined(__FreeBSD__) /* FreeBSD specific policy and affinity management */
#include <sys/cpuset.h>
static inline void drop_policy(void) { }
static inline void affine_to_cpu(int id, int cpu) {
cpuset_t set;
CPU_ZERO(&set);
CPU_SET(cpu, &set);
cpuset_setaffinity(CPU_LEVEL_WHICH, CPU_WHICH_TID, -1, sizeof(cpuset_t), &set);
}
#else /* Windows */
static inline void drop_policy(void) { }
static inline void affine_to_cpu(int id, int cpu) {
SetThreadAffinityMask(GetCurrentThread(), 1 << cpu);
}
#endif
enum workio_commands {
WC_GET_WORK,
WC_SUBMIT_WORK,
@ -388,6 +354,55 @@ static struct work _ALIGN(64) g_work;
static time_t g_work_time;
static pthread_mutex_t g_work_lock;
#ifdef __linux /* Linux specific policy and affinity management */
#include <sched.h>
static inline void drop_policy(void) {
struct sched_param param;
param.sched_priority = 0;
#ifdef SCHED_IDLE
if (unlikely(sched_setscheduler(0, SCHED_IDLE, &param) == -1))
#endif
#ifdef SCHED_BATCH
sched_setscheduler(0, SCHED_BATCH, &param);
#endif
}
static void affine_to_cpu_mask(int id, uint8_t mask) {
cpu_set_t set;
CPU_ZERO(&set);
for (uint8_t i = 0; i < num_cpus; i++) {
// cpu mask
if (mask & (1<<i)) { CPU_SET(i, &set); printf("%d \n", i); }
}
if (id == -1) {
// process affinity
sched_setaffinity(0, sizeof(&set), &set);
} else {
// thread only
pthread_setaffinity_np(thr_info[id].pth, sizeof(&set), &set);
}
}
#elif defined(__FreeBSD__) /* FreeBSD specific policy and affinity management */
#include <sys/cpuset.h>
static inline void drop_policy(void) { }
static void affine_to_cpu_mask(int id, uint8_t mask) {
cpuset_t set;
CPU_ZERO(&set);
for (uint8_t i = 0; i < num_cpus; i++) {
if (mask & (1<<i)) CPU_SET(i, &set);
}
cpuset_setaffinity(CPU_LEVEL_WHICH, CPU_WHICH_TID, -1, sizeof(cpuset_t), &set);
}
#else /* Windows */
static inline void drop_policy(void) { }
static void affine_to_cpu_mask(int id, uint8_t mask) {
if (id == -1)
SetProcessAffinityMask(GetCurrentProcess(), mask);
else
SetThreadAffinityMask(GetCurrentThread(), mask);
}
#endif
static bool get_blocktemplate(CURL *curl, struct work *work);
void get_currentalgo(char* buf, int sz)
@ -1122,14 +1137,14 @@ static void *miner_thread(void *userdata)
if (num_cpus > 1) {
if (opt_affinity == -1 && opt_n_threads > 1) {
if (!opt_quiet)
applog(LOG_DEBUG, "Binding thread %d to cpu %d", thr_id,
thr_id % num_cpus);
affine_to_cpu(thr_id, thr_id % num_cpus);
applog(LOG_DEBUG, "Binding thread %d to cpu %d (mask %x)", thr_id,
thr_id % num_cpus, (1 << (thr_id % num_cpus)));
affine_to_cpu_mask(thr_id, 1 << (thr_id % num_cpus));
} else if (opt_affinity != -1) {
if (!opt_quiet)
applog(LOG_DEBUG, "Binding thread %d to cpu %d", thr_id,
applog(LOG_DEBUG, "Binding thread %d to cpu mask %x", thr_id,
opt_affinity);
affine_to_cpu(thr_id, opt_affinity);
affine_to_cpu_mask(thr_id, opt_affinity);
}
}
@ -2287,14 +2302,12 @@ int main(int argc, char *argv[])
}
SetPriorityClass(GetCurrentProcess(), prio);
}
if (opt_affinity != -1) {
DWORD_PTR mask = (DWORD_PTR) opt_affinity;
if (!opt_quiet)
applog(LOG_DEBUG, "Binding process to cpu(s) mask %x", opt_affinity);
SetProcessAffinityMask(GetCurrentProcess(), mask);
}
#endif
if (opt_affinity != -1) {
if (!opt_quiet)
applog(LOG_DEBUG, "Binding process to cpu mask %x", opt_affinity);
affine_to_cpu_mask(-1, opt_affinity);
}
if (active_gpus == 0) {
applog(LOG_ERR, "No CUDA devices found! terminating.");
exit(1);