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authorJohannes Thumshirn <jthumshirn@suse.de>2018-01-26 13:21:38 +0300
committerChristoph Hellwig <hch@lst.de>2018-01-26 14:34:40 +0300
commitca5554a696dce37852f6d6721520b4f13fc295c3 (patch)
tree625bc90db856784abd16721d7552953672979747 /drivers/nvme
parent3d030e41d96f46c14faf79f19c3cf1b9961815c8 (diff)
downloadlinux-ca5554a696dce37852f6d6721520b4f13fc295c3.tar.xz
nvme: add tracepoint for nvme_complete_rq
Add a tracepoint in nvme_complete_rq() for completions of NVMe commands. An expmale output of the trace-point is as follows: <idle>-0 [001] d.h. 3.505266: nvme_complete_rq: cmdid=989, qid=1, res=0, retries=0, flags=0x0, status=0 Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de> Reviewed-by: Hannes Reinecke <hare@suse.com> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Reviewed-by: Keith Busch <keith.busch@intel.com> Reviewed-by: Sagi Grimberg <sagi@grimberg.me> Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'drivers/nvme')
-rw-r--r--drivers/nvme/host/core.c2
-rw-r--r--drivers/nvme/host/trace.h25
2 files changed, 27 insertions, 0 deletions
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index f1430ca79a5b..b3af8e914570 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -220,6 +220,8 @@ void nvme_complete_rq(struct request *req)
{
blk_status_t status = nvme_error_status(req);
+ trace_nvme_complete_rq(req);
+
if (unlikely(status != BLK_STS_OK && nvme_req_needs_retry(req))) {
if (nvme_req_needs_failover(req, status)) {
nvme_failover_req(req);
diff --git a/drivers/nvme/host/trace.h b/drivers/nvme/host/trace.h
index feadf0b57d17..ea91fccd1bc0 100644
--- a/drivers/nvme/host/trace.h
+++ b/drivers/nvme/host/trace.h
@@ -129,6 +129,31 @@ TRACE_EVENT(nvme_setup_nvm_cmd,
__parse_nvme_cmd(__entry->opcode, __entry->cdw10))
);
+TRACE_EVENT(nvme_complete_rq,
+ TP_PROTO(struct request *req),
+ TP_ARGS(req),
+ TP_STRUCT__entry(
+ __field(int, qid)
+ __field(int, cid)
+ __field(u64, result)
+ __field(u8, retries)
+ __field(u8, flags)
+ __field(u16, status)
+ ),
+ TP_fast_assign(
+ __entry->qid = req->q->id;
+ __entry->cid = req->tag;
+ __entry->result = le64_to_cpu(nvme_req(req)->result.u64);
+ __entry->retries = nvme_req(req)->retries;
+ __entry->flags = nvme_req(req)->flags;
+ __entry->status = nvme_req(req)->status;
+ ),
+ TP_printk("cmdid=%u, qid=%d, res=%llu, retries=%u, flags=0x%x, status=%u",
+ __entry->cid, __entry->qid, __entry->result,
+ __entry->retries, __entry->flags, __entry->status)
+
+);
+
#endif /* _TRACE_NVME_H */
#undef TRACE_INCLUDE_PATH