On 04/16/2018 04:33 PM, Bean Huo (beanhuo) wrote:
Print the request tag along with other information in block trace events
when tracing request , and unplug type (Sync / Async).
Signed-off-by: Bean Huo <beanhuo@xxxxxxxxxx>
---
include/trace/events/block.h | 36 +++++++++++++++++++++++++-----------
1 file changed, 25 insertions(+), 11 deletions(-)
diff --git a/include/trace/events/block.h b/include/trace/events/block.h
index 81b43f5..f8c0b9e 100644
--- a/include/trace/events/block.h
+++ b/include/trace/events/block.h
@@ -478,15 +486,18 @@ DECLARE_EVENT_CLASS(block_unplug,
TP_STRUCT__entry(
__field( int, nr_rq )
+ __field( bool, explicit )
__array( char, comm, TASK_COMM_LEN )
),
TP_fast_assign(
__entry->nr_rq = depth;
+ __entry->explicit = explicit;
memcpy(__entry->comm, current->comm, TASK_COMM_LEN);
),
- TP_printk("[%s] %d", __entry->comm, __entry->nr_rq)
+ TP_printk("[%s] %d %s", __entry->comm, __entry->nr_rq,
+ __entry->explicit ? "Sync" : "Async")
);
/**
This entire hunk does not seem related to this patch description.
Also, I'm not sure trace-cmd and perf et al. could format it accordingly.
See also my patch for this same functionality:
https://www.spinics.net/lists/linux-block/msg24691.html
("[PATCH v2 1/2] tracing/events: block: track and print if unplug was
explicit or schedule")
--
Mit freundlichen Grüßen / Kind regards
Steffen Maier
Linux on z Systems Development
IBM Deutschland Research & Development GmbH
Vorsitzende des Aufsichtsrats: Martina Koederitz
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