From: Patrick Farrell <pfarrell@xxxxxxxxxxxxx>
We need to capture some additional parameters to correctly
understand the behavior of strided readahead. Add these
parameters to the existing iotrace message.
WC-bug-id: https://jira.whamcloud.com/browse/LU-15317
Lustre-commit: 5ed185955985b099b ("LU-15317 llite: Add strided readahead to iotrace")
Signed-off-by: Patrick Farrell <pfarrell@xxxxxxxxxxxxx>
Reviewed-on: https://review.whamcloud.com/45888
Reviewed-by: Andreas Dilger <adilger@xxxxxxxxxxxxx>
Reviewed-by: Sebastien Buisson <sbuisson@xxxxxxx>
Reviewed-by: Oleg Drokin <green@xxxxxxxxxxxxx>
Signed-off-by: James Simmons <jsimmons@xxxxxxxxxxxxx>
---
fs/lustre/llite/rw.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/fs/lustre/llite/rw.c b/fs/lustre/llite/rw.c
index 239f78b..1c2f027 100644
--- a/fs/lustre/llite/rw.c
+++ b/fs/lustre/llite/rw.c
@@ -1696,9 +1696,11 @@ int ll_io_read_page(const struct lu_env *env, struct cl_io *io,
* read pages
*/
CDEBUG(D_READA | (rc2 ? D_IOTRACE : 0),
- DFID " %d pages read ahead at %lu, triggered by user read at %lu\n",
+ DFID " %d pages read ahead at %lu, triggered by user read at %lu, stride offset %lld, stride length %lld, stride bytes %lld\n",
PFID(ll_inode2fid(inode)), rc2, ra_start_index,
- vvp_index(vpg));
+ vvp_index(vpg), ras->ras_stride_offset,
+ ras->ras_stride_length, ras->ras_stride_bytes);
+
} else if (vvp_index(vpg) == io_start_index &&
io_end_index - io_start_index > 0) {
rc2 = ll_readpages(env, io, &queue->c2_qin, io_start_index + 1,
--
1.8.3.1
|