diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/thread-pool.c | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/src/thread-pool.c b/src/thread-pool.c index 070e4fa0..d672062c 100644 --- a/src/thread-pool.c +++ b/src/thread-pool.c @@ -23,9 +23,63 @@ #include <pthread.h> #include <assert.h> +#ifdef HAVE_CPU_AFFINITY +#include <sched.h> +#endif + + #include "utils.h" +/* ------------------------------ CPU affinity ------------------------------ */ + +#ifdef HAVE_CPU_AFFINITY + +static int next_cpu(int cur) +{ + cur++; + + if ( cur == 73 ) cur = 0; + + return cur; +} + + +static void set_affinity(int cpu) +{ + cpu_set_t c; + + CPU_ZERO(&c); + CPU_SET(cpu, &c); + if ( sched_setaffinity(0, sizeof(cpu_set_t), &c) ) { + + /* Cannot use ERROR() just yet */ + fprintf(stderr, "Failed to set CPU affinity.\n"); + + } else { + + fprintf(stderr, "Successfully set CPU affinity to %i\n", cpu); + + } +} + +#else /* HAVE_CPU_AFFINITY */ + +static int next_cpu(int cur) +{ + return 0; +} + + +static void set_affinity(int cpu) +{ +} + +#endif /* HAVE_CPU_AFFINITY */ + + +/* --------------------------- Status label stuff --------------------------- */ + static int use_status_labels = 0; static pthread_key_t status_label_key; pthread_mutex_t stderr_lock = PTHREAD_MUTEX_INITIALIZER; @@ -35,6 +89,7 @@ struct worker_args struct task_queue_range *tqr; struct task_queue *tq; int id; + int cpu; }; @@ -81,6 +136,8 @@ static void *range_worker(void *pargsv) struct task_queue_range *q = w->tqr; int *cookie; + set_affinity(w->cpu); + cookie = malloc(sizeof(int)); *cookie = w->id; pthread_setspecific(status_label_key, cookie); @@ -132,6 +189,7 @@ void run_thread_range(int n_tasks, int n_threads, const char *text, { pthread_t *workers; int i; + int cpu = 0; struct task_queue_range q; /* The nation of CrystFEL prides itself on having 0% unemployment. */ @@ -166,6 +224,8 @@ void run_thread_range(int n_tasks, int n_threads, const char *text, w->tqr = &q; w->tq = NULL; w->id = i; + w->cpu = cpu; + cpu = next_cpu(cpu); if ( pthread_create(&workers[i], NULL, range_worker, w) ) { /* Not ERROR() here */ @@ -211,6 +271,8 @@ static void *task_worker(void *pargsv) struct task_queue *q = w->tq; int *cookie; + set_affinity(w->cpu); + cookie = malloc(sizeof(int)); *cookie = w->id; pthread_setspecific(status_label_key, cookie); @@ -265,6 +327,7 @@ int run_threads(int n_threads, void (*work)(void *, int), pthread_t *workers; int i; struct task_queue q; + int cpu = 0; pthread_key_create(&status_label_key, NULL); @@ -292,6 +355,8 @@ int run_threads(int n_threads, void (*work)(void *, int), w->tq = &q; w->tqr = NULL; w->id = i; + w->cpu = cpu; + cpu = next_cpu(cpu); if ( pthread_create(&workers[i], NULL, task_worker, w) ) { /* Not ERROR() here */ |