io_u: calculate incremental residuals correctly

[fio.git] / gettime-thread.c

diff --git a/gettime-thread.c b/gettime-thread.c
index 87f50600cca01a78d25f53f167d7835212dde5cc..953e4e67e36db81e39aae9bb073b332f8bd373ab 100644 (file)
--- a/gettime-thread.c
+++ b/gettime-thread.c
@@ -1,12 +1,11 @@
-#include <unistd.h>
-#include <math.h>
 #include <sys/time.h>
 #include <time.h>
 
 #include "fio.h"
+#include "lib/seqlock.h"
 #include "smalloc.h"
 
-struct timespec *fio_ts = NULL;
+struct fio_ts *fio_ts;
 int fio_gtod_offload = 0;
 static pthread_t gtod_thread;
 static os_cpu_mask_t fio_gtod_cpumask;
@@ -17,21 +16,21 @@ void fio_gtod_init(void)
                return;
 
        fio_ts = smalloc(sizeof(*fio_ts));
-       if (!fio_ts)
-               log_err("fio: smalloc pool exhausted\n");
 }
 
 static void fio_gtod_update(void)
 {
-       if (fio_ts) {
-               struct timeval __tv;
-
-               gettimeofday(&__tv, NULL);
-               fio_ts->tv_sec = __tv.tv_sec;
-               write_barrier();
-               fio_ts->tv_nsec = __tv.tv_usec * 1000;
-               write_barrier();
-       }
+       struct timeval __tv;
+
+       if (!fio_ts)
+               return;
+
+       gettimeofday(&__tv, NULL);
+
+       write_seqlock_begin(&fio_ts->seqlock);
+       fio_ts->ts.tv_sec = __tv.tv_sec;
+       fio_ts->ts.tv_nsec = __tv.tv_usec * 1000;
+       write_seqlock_end(&fio_ts->seqlock);
 }
 
 struct gtod_cpu_data {