if (ret > 0)
ret = fifo_put(fifo, buf, ret);
+ dprint(FD_BLKTRACE, "refill: filled %d bytes\n", ret);
return ret;
}
if (t->pdu_len == 0)
return 0;
+ dprint(FD_BLKTRACE, "discard pdu len %u\n", t->pdu_len);
return trace_fifo_get(td, fifo, fd, NULL, t->pdu_len);
}
continue;
if (maj == major(st.st_rdev) && min == minor(st.st_rdev)) {
+ dprint(FD_BLKTRACE, "device lookup: %d/%d\n", maj,min);
strcpy(path, full_path);
found = 1;
break;
return;
strcpy(dev, "/dev");
- if (lookup_device(dev, maj, min))
+ if (lookup_device(dev, maj, min)) {
+ dprint(FD_BLKTRACE, "add devices %s\n", dev);
add_file(td, dev);
+ }
}
/*
else
ipo->ddir = DDIR_READ;
+ dprint(FD_BLKTRACE, "store ddir=%d, off=%llu, len=%lu, delay=%lu\n",
+ ipo->ddir, ipo->offset,
+ ipo->len, ipo->delay);
list_add_tail(&ipo->list, &td->io_log_list);
}
{
unsigned long long ttime, delay;
struct blk_io_trace t;
- unsigned long ios[2];
+ unsigned long ios[2], skipped_writes;
unsigned int cpu;
unsigned int rw_bs[2];
struct fifo *fifo;
ttime = 0;
ios[0] = ios[1] = 0;
rw_bs[0] = rw_bs[1] = 0;
+ skipped_writes = 0;
do {
int ret = trace_fifo_get(td, fifo, fd, &t, sizeof(t));
delay = 0;
if (cpu == t.cpu)
delay = t.time - ttime;
- handle_trace(td, &t, delay, ios, rw_bs);
+ if ((t.action & BLK_TC_ACT(BLK_TC_WRITE)) && read_only)
+ skipped_writes++;
+ else
+ handle_trace(td, &t, delay, ios, rw_bs);
ttime = t.time;
cpu = t.cpu;
} while (1);
fifo_free(fifo);
close(fd);
+ if (skipped_writes)
+ log_err("fio: <%s> skips replay of %lu writes due to read-only\n", td->o.name, skipped_writes);
+
if (!ios[DDIR_READ] && !ios[DDIR_WRITE]) {
log_err("fio: found no ios in blktrace data\n");
return 1;