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gettime: include min/max cycle counts for CPU clock
[fio.git]
/
gettime-thread.c
diff --git
a/gettime-thread.c
b/gettime-thread.c
index c1b4b0967c28f354b8a3e6c9ad82fc2845c41e56..2dc976fb42c7bbb5b4deedc0746d5577bd5c1e0b 100644
(file)
--- a/
gettime-thread.c
+++ b/
gettime-thread.c
@@
-6,13
+6,18
@@
#include "fio.h"
#include "smalloc.h"
#include "fio.h"
#include "smalloc.h"
-struct timeval *fio_tv;
+struct timeval *fio_tv
= NULL
;
int fio_gtod_offload = 0;
int fio_gtod_offload = 0;
-int fio_gtod_cpu = -1;
static pthread_t gtod_thread;
static pthread_t gtod_thread;
+#ifdef FIO_HAVE_CPU_AFFINITY
+static os_cpu_mask_t fio_gtod_cpumask;
+#endif
void fio_gtod_init(void)
{
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");
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)
{
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;
static void *gtod_thread_main(void *data)
{
struct fio_mutex *mutex = data;
+ fio_setaffinity(gettid(), fio_gtod_cpumask);
fio_mutex_up(mutex);
/*
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);
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));
pthread_attr_destroy(&attr);
if (ret) {
log_err("Can't create gtod thread: %s\n", strerror(ret));
@@
-77,4
+95,9
@@
err:
return ret;
}
return ret;
}
-
+void fio_gtod_set_cpu(unsigned int cpu)
+{
+#ifdef FIO_HAVE_CPU_AFFINITY
+ fio_cpu_set(&fio_gtod_cpumask, cpu);
+#endif
+}