X-Git-Url: https://git.kernel.dk/?p=fio.git;a=blobdiff_plain;f=gettime-thread.c;h=2dc976fb42c7bbb5b4deedc0746d5577bd5c1e0b;hp=c1b4b0967c28f354b8a3e6c9ad82fc2845c41e56;hb=9451b93e81fb950a80da09e295e56b1ad4538509;hpb=95820b6e6c92025df8d89c0bf39b174e53137c41 diff --git a/gettime-thread.c b/gettime-thread.c index c1b4b096..2dc976fb 100644 --- a/gettime-thread.c +++ b/gettime-thread.c @@ -6,13 +6,18 @@ #include "fio.h" #include "smalloc.h" -struct timeval *fio_tv; +struct timeval *fio_tv = NULL; int fio_gtod_offload = 0; -int fio_gtod_cpu = -1; static pthread_t gtod_thread; +#ifdef FIO_HAVE_CPU_AFFINITY +static os_cpu_mask_t fio_gtod_cpumask; +#endif void fio_gtod_init(void) { + if (fio_tv) + return; + fio_tv = smalloc(sizeof(struct timeval)); if (!fio_tv) log_err("fio: smalloc pool exhausted\n"); @@ -20,14 +25,27 @@ void fio_gtod_init(void) static void fio_gtod_update(void) { - if (fio_tv) - gettimeofday(fio_tv, NULL); + if (fio_tv) { + struct timeval __tv; + + gettimeofday(&__tv, NULL); + fio_tv->tv_sec = __tv.tv_sec; + write_barrier(); + fio_tv->tv_usec = __tv.tv_usec; + write_barrier(); + } } +struct gtod_cpu_data { + struct fio_mutex *mutex; + unsigned int cpu; +}; + static void *gtod_thread_main(void *data) { struct fio_mutex *mutex = data; + fio_setaffinity(gettid(), fio_gtod_cpumask); fio_mutex_up(mutex); /* @@ -56,7 +74,7 @@ int fio_start_gtod_thread(void) pthread_attr_init(&attr); pthread_attr_setstacksize(&attr, PTHREAD_STACK_MIN); - ret = pthread_create(>od_thread, &attr, gtod_thread_main, NULL); + ret = pthread_create(>od_thread, &attr, gtod_thread_main, mutex); pthread_attr_destroy(&attr); if (ret) { log_err("Can't create gtod thread: %s\n", strerror(ret)); @@ -77,4 +95,9 @@ err: return ret; } - +void fio_gtod_set_cpu(unsigned int cpu) +{ +#ifdef FIO_HAVE_CPU_AFFINITY + fio_cpu_set(&fio_gtod_cpumask, cpu); +#endif +}