blktrace replay: delay support

[fio.git] / blktrace.c

diff --git a/blktrace.c b/blktrace.c
index 1669fe556bc3324d2b40567e0afdab0f0e359667..5793773a10837799dea5644cef66277ffaf85c7e 100644 (file)
--- a/blktrace.c
+++ b/blktrace.c
@@ -110,9 +110,10 @@ static void handle_trace(struct thread_data *td, struct blk_io_trace *t,
  */
 int load_blktrace(struct thread_data *td, const char *filename)
 {
-       unsigned long long ttime;
+       unsigned long long ttime, delay;
        struct blk_io_trace t;
        unsigned long ios[2];
+       unsigned int cpu;
        int fd;
 
        fd = open(filename, O_RDONLY);
@@ -125,6 +126,7 @@ int load_blktrace(struct thread_data *td, const char *filename)
 
        ios[0] = ios[1] = 0;
        ttime = 0;
+       cpu = 0;
        do {
                /*
                 * Once this is working fully, I'll add a layer between
@@ -157,10 +159,16 @@ int load_blktrace(struct thread_data *td, const char *filename)
                        td_verror(td, ret, "blktrace lseek");
                        goto err;
                }
-               if (!ttime)
+               if (!ttime) {
                        ttime = t.time;
-               handle_trace(td, &t, t.time - ttime, ios);
+                       cpu = t.cpu;
+               }
+               delay = 0;
+               if (cpu == t.cpu)
+                       delay = t.time - ttime;
+               handle_trace(td, &t, delay, ios);
                ttime = t.time;
+               cpu = t.cpu;
        } while (1);
 
        close(fd);