Add blktrace and verify debug tracing

[fio.git] / blktrace.c

diff --git a/blktrace.c b/blktrace.c
index 64e49f5e4b552d3d4e67dea8ca7eed5dcf6e589e..538bcd71b9091b02b558d362fafabc6b15b630c2 100644 (file)
--- a/blktrace.c
+++ b/blktrace.c
@@ -34,6 +34,7 @@ static int refill_fifo(struct thread_data *td, struct fifo *fifo, int fd)
        if (ret > 0)
                ret = fifo_put(fifo, buf, ret);
 
+       dprint(FD_BLKTRACE, "refill: filled %d bytes\n", ret);
        return ret;
 }
 
@@ -62,6 +63,7 @@ static int discard_pdu(struct thread_data *td, struct fifo *fifo, int fd,
        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 @@ static int lookup_device(char *path, unsigned int maj, unsigned int min)
                        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 @@ static void trace_add_file(struct thread_data *td, __u32 device)
                        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 @@ static void store_ipo(struct thread_data *td, unsigned long long offset,
        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);
 }