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Commit ca5554a6 authored by Johannes Thumshirn's avatar Johannes Thumshirn Committed by Christoph Hellwig
Browse files

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: default avatarJohannes Thumshirn <jthumshirn@suse.de>
Reviewed-by: default avatarHannes Reinecke <hare@suse.com>
Reviewed-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: default avatarKeith Busch <keith.busch@intel.com>
Reviewed-by: default avatarSagi Grimberg <sagi@grimberg.me>
Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
parent 3d030e41

drivers/nvme/host/core.c

+2 −0
Original line number Diff line number Diff line
@@ -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);

drivers/nvme/host/trace.h

+25 −0
Original line number Diff line number Diff line
@@ -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