diff options
| author | Dave Chinner <dchinner@redhat.com> | 2012-04-24 16:33:31 +1000 |
|---|---|---|
| committer | Ben Myers <bpm@sgi.com> | 2012-05-21 10:45:44 -0500 |
| commit | 14c26c6a05de138a4fd9a0c05ff8e7435a618324 (patch) | |
| tree | c916866e4e9ac21d5f3400edf3eb8186ea7740af /MAINTAINERS | |
| parent | 3ba316037470bbf98c8a16c2179c02794fb8862e (diff) | |
xfs: add trace points for log forces
To enable easy tracing of the location of log forces and the
frequency of them via perf, add a pair of trace points to the log
force functions. This will help debug where excessive log forces
are being issued from by simple perf commands like:
# ~/perf/perf top -e xfs:xfs_log_force -G -U
Which gives this sort of output:
Events: 141 xfs:xfs_log_force
- 100.00% [kernel] [k] xfs_log_force
- xfs_log_force
87.04% xfsaild
kthread
kernel_thread_helper
- 12.87% xfs_buf_lock
_xfs_buf_find
xfs_buf_get
xfs_trans_get_buf
xfs_da_do_buf
xfs_da_get_buf
xfs_dir2_data_init
xfs_dir2_leaf_addname
xfs_dir_createname
xfs_create
xfs_vn_mknod
xfs_vn_create
vfs_create
do_last.isra.41
path_openat
do_filp_open
do_sys_open
sys_open
system_call_fastpath
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Mark Tinguely <tinguely@sgi.com>
Signed-off-by: Ben Myers <bpm@sig.com>
Diffstat (limited to 'MAINTAINERS')
0 files changed, 0 insertions, 0 deletions