Add blktrace and verify debug tracing
Also add "all" as a keyword for setting all values, and pretty up
the output a bit by justifying and aligning the output.
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
diff --git a/blktrace.c b/blktrace.c
index 64e49f5..538bcd7 100644
--- a/blktrace.c
+++ b/blktrace.c
@@ -34,6 +34,7 @@
if (ret > 0)
ret = fifo_put(fifo, buf, ret);
+ dprint(FD_BLKTRACE, "refill: filled %d bytes\n", ret);
return ret;
}
@@ -62,6 +63,7 @@
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);
}
@@ -130,6 +132,7 @@
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;
@@ -168,8 +171,10 @@
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);
+ }
}
/*
@@ -193,6 +198,9 @@
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);
}