From: Johannes Thumshirn <jthumshirn@suse.de>
To: Christoph Hellwig <hch@lst.de>
Cc: Sagi Grimberg <sagi@grimberg.me>,
Keith Busch <keith.busch@intel.com>,
Linux Kernel Mailinglist <linux-kernel@vger.kernel.org>,
Hannes Reinecke <hare@suse.de>,
Linux NVMe Mailinglist <linux-nvme@lists.infradead.org>,
"Martin K . Petersen" <martin.petersen@oracle.com>,
Johannes Thumshirn <jthumshirn@suse.de>
Subject: [PATCH v7 2/2] nvme: add tracepoint for nvme_complete_rq
Date: Wed, 24 Jan 2018 09:28:28 +0100 [thread overview]
Message-ID: <20180124082828.364-3-jthumshirn@suse.de> (raw)
In-Reply-To: <20180124082828.364-1-jthumshirn@suse.de>
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>
---
drivers/nvme/host/core.c | 2 ++
drivers/nvme/host/trace.h | 26 ++++++++++++++++++++++++++
2 files changed, 28 insertions(+)
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index 358dfdc1f6da..7cbd4a260d30 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 f17dbfbead5a..afd87235311b 100644
--- a/drivers/nvme/host/trace.h
+++ b/drivers/nvme/host/trace.h
@@ -130,6 +130,32 @@ 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(__le64, result)
+ __field(u8, retries)
+ __field(u8, flags)
+ __field(u16, status)
+ ),
+ TP_fast_assign(
+ __entry->qid = req->q->id;
+ __entry->cid = req->tag;
+ __entry->result = 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,
+ le64_to_cpu(__entry->result),
+ __entry->retries, __entry->flags, __entry->status)
+
+);
+
#endif /* _TRACE_NVME_H */
#undef TRACE_INCLUDE_PATH
--
2.13.6
next prev parent reply other threads:[~2018-01-24 8:29 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-01-24 8:28 [PATCH v7 0/2] add tracepoints for nvme command submission and completion Johannes Thumshirn
2018-01-24 8:28 ` [PATCH v7 1/2] nvme: add tracepoint for nvme_setup_cmd Johannes Thumshirn
2018-01-24 8:28 ` Johannes Thumshirn [this message]
2018-01-25 15:21 ` [PATCH v7 0/2] add tracepoints for nvme command submission and completion Christoph Hellwig
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