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authorNicholas Bellinger <nab@daterainc.com>2017-01-20 02:45:57 +0300
committerNicholas Bellinger <nab@linux-iscsi.org>2017-02-27 03:21:06 +0300
commitc87ba9c49c1fa86261448b09c5f1b2223bf7efd9 (patch)
treed710dc3220024b8215cb2531fc55a122ebaba07c /include/target
parent17c61ad66f2e09a9014ab2d4e1f04c8294427db1 (diff)
downloadlinux-c87ba9c49c1fa86261448b09c5f1b2223bf7efd9.tar.xz
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 'include/target')
-rw-r--r--include/target/target_core_base.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/target/target_core_base.h b/include/target/target_core_base.h
index 16d3be8395be..49ce5bc9912f 100644
--- a/include/target/target_core_base.h
+++ b/include/target/target_core_base.h
@@ -766,6 +766,8 @@ struct se_device {
u32 dev_index;
u64 creation_time;
atomic_long_t num_resets;
+ atomic_long_t aborts_complete;
+ atomic_long_t aborts_no_task;
atomic_long_t num_cmds;
atomic_long_t read_bytes;
atomic_long_t write_bytes;