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nvme: use hw qid in trace events 

We can not match a command to its completion based on the command
id alone. We need the submitting queue identifier to pair with the
completion, so this patch adds that to the trace buffer.

This patch is also collapsing the admin and IO submission traces into a
single one so we don't need to duplicate this and creating unnecessary
code branches: we know if the command is an admin vs IO based on the qid.

And since we're here, the patch fixes code formatting in the area.

Signed-off-by: Keith Busch <keith.busch@intel.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
[hch: move the qid helper to nvme.h and made it an inline function]
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Keith Busch 2018-06-29 16:50:01 -06:00 committed by Christoph Hellwig
parent 59e29ce66b
commit 5d87eb94d9
3 changed files with 54 additions and 72 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
drivers/nvme/host/core.c
View File

@ -652,10 +652,7 @@ blk_status_t nvme_setup_cmd(struct nvme_ns *ns, struct request *req,
}
cmd->common.command_id = req->tag;
if (ns)
trace_nvme_setup_nvm_cmd(req->q->id, cmd);
else
trace_nvme_setup_admin_cmd(cmd);
trace_nvme_setup_cmd(req, cmd);
return ret;
}
EXPORT_SYMBOL_GPL(nvme_setup_cmd);

7
drivers/nvme/host/nvme.h
View File

@ -120,6 +120,13 @@ static inline struct nvme_request *nvme_req(struct request *req)
return blk_mq_rq_to_pdu(req);
}
static inline u16 nvme_req_qid(struct request *req)
{
if (!req->rq_disk)
return 0;
return blk_mq_unique_tag_to_hwq(blk_mq_unique_tag(req)) + 1;
}
/* The below value is the specific amount of delay needed before checking
* readiness in case of the PCI_DEVICE(0x1c58, 0x0003), which needs the
* NVME_QUIRK_DELAY_BEFORE_CHK_RDY quirk enabled. The value (in ms) was

114
drivers/nvme/host/trace.h
View File

@ -50,13 +50,8 @@
nvme_admin_opcode_name(nvme_admin_security_recv), \
nvme_admin_opcode_name(nvme_admin_sanitize_nvm))
const char *nvme_trace_parse_admin_cmd(struct trace_seq *p, u8 opcode,
u8 *cdw10);
#define __parse_nvme_admin_cmd(opcode, cdw10) \
nvme_trace_parse_admin_cmd(p, opcode, cdw10)
#define nvme_opcode_name(opcode) { opcode, #opcode }
#define show_opcode_name(val) \
#define show_nvm_opcode_name(val) \
__print_symbolic(val, \
nvme_opcode_name(nvme_cmd_flush), \
nvme_opcode_name(nvme_cmd_write), \
@ -70,83 +65,66 @@ const char *nvme_trace_parse_admin_cmd(struct trace_seq *p, u8 opcode,
nvme_opcode_name(nvme_cmd_resv_acquire), \
nvme_opcode_name(nvme_cmd_resv_release))
#define show_opcode_name(qid, opcode) \
(qid ? show_nvm_opcode_name(opcode) : show_admin_opcode_name(opcode))
const char *nvme_trace_parse_admin_cmd(struct trace_seq *p, u8 opcode,
u8 *cdw10);
const char *nvme_trace_parse_nvm_cmd(struct trace_seq *p, u8 opcode,
u8 *cdw10);
#define __parse_nvme_cmd(opcode, cdw10) \
nvme_trace_parse_nvm_cmd(p, opcode, cdw10)
u8 *cdw10);
TRACE_EVENT(nvme_setup_admin_cmd,
TP_PROTO(struct nvme_command *cmd),
TP_ARGS(cmd),
#define parse_nvme_cmd(qid, opcode, cdw10) \
(qid ? \
nvme_trace_parse_nvm_cmd(p, opcode, cdw10) : \
nvme_trace_parse_admin_cmd(p, opcode, cdw10))
TRACE_EVENT(nvme_setup_cmd,
TP_PROTO(struct request *req, struct nvme_command *cmd),
TP_ARGS(req, cmd),
TP_STRUCT__entry(
__field(u8, opcode)
__field(u8, flags)
__field(u16, cid)
__field(u64, metadata)
__array(u8, cdw10, 24)
__field(int, qid)
__field(u8, opcode)
__field(u8, flags)
__field(u16, cid)
__field(u32, nsid)
__field(u64, metadata)
__array(u8, cdw10, 24)
),
TP_fast_assign(
__entry->opcode = cmd->common.opcode;
__entry->flags = cmd->common.flags;
__entry->cid = cmd->common.command_id;
__entry->metadata = le64_to_cpu(cmd->common.metadata);
memcpy(__entry->cdw10, cmd->common.cdw10,
sizeof(__entry->cdw10));
__entry->qid = nvme_req_qid(req);
__entry->opcode = cmd->common.opcode;
__entry->flags = cmd->common.flags;
__entry->cid = cmd->common.command_id;
__entry->nsid = le32_to_cpu(cmd->common.nsid);
__entry->metadata = le64_to_cpu(cmd->common.metadata);
memcpy(__entry->cdw10, cmd->common.cdw10,
sizeof(__entry->cdw10));
),
TP_printk(" cmdid=%u, flags=0x%x, meta=0x%llx, cmd=(%s %s)",
__entry->cid, __entry->flags, __entry->metadata,
show_admin_opcode_name(__entry->opcode),
__parse_nvme_admin_cmd(__entry->opcode, __entry->cdw10))
);
TRACE_EVENT(nvme_setup_nvm_cmd,
TP_PROTO(int qid, struct nvme_command *cmd),
TP_ARGS(qid, cmd),
TP_STRUCT__entry(
__field(int, qid)
__field(u8, opcode)
__field(u8, flags)
__field(u16, cid)
__field(u32, nsid)
__field(u64, metadata)
__array(u8, cdw10, 24)
),
TP_fast_assign(
__entry->qid = qid;
__entry->opcode = cmd->common.opcode;
__entry->flags = cmd->common.flags;
__entry->cid = cmd->common.command_id;
__entry->nsid = le32_to_cpu(cmd->common.nsid);
__entry->metadata = le64_to_cpu(cmd->common.metadata);
memcpy(__entry->cdw10, cmd->common.cdw10,
sizeof(__entry->cdw10));
),
TP_printk("qid=%d, nsid=%u, cmdid=%u, flags=0x%x, meta=0x%llx, cmd=(%s %s)",
__entry->qid, __entry->nsid, __entry->cid,
TP_printk("qid=%d, cmdid=%u, nsid=%u, flags=0x%x, meta=0x%llx, cmd=(%s %s)",
__entry->qid, __entry->cid, __entry->nsid,
__entry->flags, __entry->metadata,
show_opcode_name(__entry->opcode),
__parse_nvme_cmd(__entry->opcode, __entry->cdw10))
show_opcode_name(__entry->qid, __entry->opcode),
parse_nvme_cmd(__entry->qid, __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)
__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;
__entry->qid = nvme_req_qid(req);
__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("qid=%d, cmdid=%u, res=%llu, retries=%u, flags=0x%x, status=%u",
__entry->qid, __entry->cid, __entry->result,