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| author |   Nicholas Bellinger <nab@daterainc.com> | 2017-01-19 15:45:57 -0800 |
|---|---|---|
| committer |   Nicholas Bellinger <nab@linux-iscsi.org> | 2017-02-26 16:21:06 -0800 |
| commit | c87ba9c49c1fa86261448b09c5f1b2223bf7efd9 (patch) | |
| tree | d710dc3220024b8215cb2531fc55a122ebaba07c /tools/perf/scripts/python/call-graph-from-sql.py | |
| parent | iscsi-target: Fix early login failure statistics misses (diff) | |
| download | linux-dev-c87ba9c49c1fa86261448b09c5f1b2223bf7efd9.tar.xz linux-dev-c87ba9c49c1fa86261448b09c5f1b2223bf7efd9.zip | |
target: Add counters for ABORT_TASK success + failure
This patch introduces two counters for ABORT_TASK success +
failure under:
/sys/kernel/config/target/core/$HBA/$DEV/statistics/scsi_tgt_dev/
that are useful for diagnosing various backend device latency
and front fabric issues.
Normally when folks see alot of aborts_complete happening,
it means the backend device I/O completion latency is high,
and not returning completions fast enough before host side
timeouts trigger.
And normally when folks see alot of aborts_no_task, it means
completions are being posted by target-core into fabric driver
code, but the responses aren't making it back to the host.
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Diffstat (limited to 'tools/perf/scripts/python/call-graph-from-sql.py')
0 files changed, 0 insertions, 0 deletions