X-Git-Url: https://git.kernel.dk/?p=fio.git;a=blobdiff_plain;f=gettime-thread.c;h=6dc14864fdc61bb8380702c154dce5e83f60d2b0;hp=c1b4b0967c28f354b8a3e6c9ad82fc2845c41e56;hb=bc0fe8b846bacd02bb5bf43d659086d293792bc3;hpb=fba5c5ff89163062922c3e560e871c087f2177c3

diff --git a/gettime-thread.c b/gettime-thread.c
index c1b4b096..6dc14864 100644
--- a/gettime-thread.c
+++ b/gettime-thread.c
@@ -6,13 +6,16 @@
 #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;
+static os_cpu_mask_t fio_gtod_cpumask;
 
 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 +23,27 @@ 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 +72,7 @@ int fio_start_gtod_thread(void)
 
 	pthread_attr_init(&attr);
 	pthread_attr_setstacksize(&attr, PTHREAD_STACK_MIN);
-	ret = pthread_create(&gtod_thread, &attr, gtod_thread_main, NULL);
+	ret = pthread_create(&gtod_thread, &attr, gtod_thread_main, mutex);
 	pthread_attr_destroy(&attr);
 	if (ret) {
 		log_err("Can't create gtod thread: %s\n", strerror(ret));
@@ -65,7 +81,7 @@ int fio_start_gtod_thread(void)
 
 	ret = pthread_detach(gtod_thread);
 	if (ret) {
-		log_err("Can't detatch gtod thread: %s\n", strerror(ret));
+		log_err("Can't detach gtod thread: %s\n", strerror(ret));
 		goto err;
 	}
 
@@ -77,4 +93,9 @@ err:
 	return ret;
 }
 
-
+void fio_gtod_set_cpu(unsigned int cpu)
+{
+#ifdef FIO_HAVE_CPU_AFFINITY
+	fio_cpu_set(&fio_gtod_cpumask, cpu);
+#endif
+}