xprtrdma: Add trace points in RPC Call transmit paths

Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
2017-12-20 16:30:40 -05:00
parent e48f083e19
commit ab03eff58e
3 changed files with 131 additions and 17 deletions
--- a/include/trace/events/rpcrdma.h
+++ b/include/trace/events/rpcrdma.h
@@ -11,6 +11,130 @@
 #include <linux/tracepoint.h>
 #include <trace/events/rdma.h>

+/**
+ ** Call events
+ **/
+
+TRACE_DEFINE_ENUM(rpcrdma_noch);
+TRACE_DEFINE_ENUM(rpcrdma_readch);
+TRACE_DEFINE_ENUM(rpcrdma_areadch);
+TRACE_DEFINE_ENUM(rpcrdma_writech);
+TRACE_DEFINE_ENUM(rpcrdma_replych);
+
+#define xprtrdma_show_chunktype(x)					\
+		__print_symbolic(x,					\
+				{ rpcrdma_noch, "inline" },		\
+				{ rpcrdma_readch, "read list" },	\
+				{ rpcrdma_areadch, "*read list" },	\
+				{ rpcrdma_writech, "write list" },	\
+				{ rpcrdma_replych, "reply chunk" })
+
+TRACE_EVENT(xprtrdma_marshal,
+	TP_PROTO(
+		const struct rpc_rqst *rqst,
+		unsigned int hdrlen,
+		unsigned int rtype,
+		unsigned int wtype
+	),
+
+	TP_ARGS(rqst, hdrlen, rtype, wtype),
+
+	TP_STRUCT__entry(
+		__field(unsigned int, task_id)
+		__field(unsigned int, client_id)
+		__field(u32, xid)
+		__field(unsigned int, hdrlen)
+		__field(unsigned int, headlen)
+		__field(unsigned int, pagelen)
+		__field(unsigned int, taillen)
+		__field(unsigned int, rtype)
+		__field(unsigned int, wtype)
+	),
+
+	TP_fast_assign(
+		__entry->task_id = rqst->rq_task->tk_pid;
+		__entry->client_id = rqst->rq_task->tk_client->cl_clid;
+		__entry->xid = be32_to_cpu(rqst->rq_xid);
+		__entry->hdrlen = hdrlen;
+		__entry->headlen = rqst->rq_snd_buf.head[0].iov_len;
+		__entry->pagelen = rqst->rq_snd_buf.page_len;
+		__entry->taillen = rqst->rq_snd_buf.tail[0].iov_len;
+		__entry->rtype = rtype;
+		__entry->wtype = wtype;
+	),
+
+	TP_printk("task:%u@%u xid=0x%08x: hdr=%u xdr=%u/%u/%u %s/%s",
+		__entry->task_id, __entry->client_id, __entry->xid,
+		__entry->hdrlen,
+		__entry->headlen, __entry->pagelen, __entry->taillen,
+		xprtrdma_show_chunktype(__entry->rtype),
+		xprtrdma_show_chunktype(__entry->wtype)
+	)
+);
+
+TRACE_EVENT(xprtrdma_post_send,
+	TP_PROTO(
+		const struct rpcrdma_req *req,
+		int status
+	),
+
+	TP_ARGS(req, status),
+
+	TP_STRUCT__entry(
+		__field(const void *, req)
+		__field(int, num_sge)
+		__field(bool, signaled)
+		__field(int, status)
+	),
+
+	TP_fast_assign(
+		__entry->req = req;
+		__entry->num_sge = req->rl_sendctx->sc_wr.num_sge;
+		__entry->signaled = req->rl_sendctx->sc_wr.send_flags &
+				    IB_SEND_SIGNALED;
+		__entry->status = status;
+	),
+
+	TP_printk("req=%p, %d SGEs%s, status=%d",
+		__entry->req, __entry->num_sge,
+		(__entry->signaled ? ", signaled" : ""),
+		__entry->status
+	)
+);
+
+/**
+ ** Completion events
+ **/
+
+TRACE_EVENT(xprtrdma_wc_send,
+	TP_PROTO(
+		const struct rpcrdma_sendctx *sc,
+		const struct ib_wc *wc
+	),
+
+	TP_ARGS(sc, wc),
+
+	TP_STRUCT__entry(
+		__field(const void *, req)
+		__field(unsigned int, unmap_count)
+		__field(unsigned int, status)
+		__field(unsigned int, vendor_err)
+	),
+
+	TP_fast_assign(
+		__entry->req = sc->sc_req;
+		__entry->unmap_count = sc->sc_unmap_count;
+		__entry->status = wc->status;
+		__entry->vendor_err = __entry->status ? wc->vendor_err : 0;
+	),
+
+	TP_printk("req=%p, unmapped %u pages: %s (%u/0x%x)",
+		__entry->req, __entry->unmap_count,
+		rdma_show_wc_status(__entry->status),
+		__entry->status, __entry->vendor_err
+	)
+);
+
 #endif /* _TRACE_RPCRDMA_H */

 #include <trace/define_trace.h>