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authorChuck Lever <chuck.lever@oracle.com>2019-08-19 18:47:10 -0400
committerAnna Schumaker <Anna.Schumaker@Netapp.com>2019-08-21 11:06:24 -0400
commit6dc6ec9e04c468d994bff6eb660f3146f94cbfd9 (patch)
tree8fdb4a42ade89bbad59dcafd1f20c6e84ba4c914 /include/trace
parent805a1f620ba38c5f6de8b9697f35dcb38d8112b5 (diff)
xprtrdma: Cache free MRs in each rpcrdma_req
Instead of a globally-contended MR free list, cache MRs in each rpcrdma_req as they are released. This means acquiring and releasing an MR will be lock-free in the common case, even outside the transport send lock. The original idea of per-rpcrdma_req MR free lists was suggested by Shirley Ma <shirley.ma@oracle.com> several years ago. I just now figured out how to make that idea work with on-demand MR allocation. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Diffstat (limited to 'include/trace')
-rw-r--r--include/trace/events/rpcrdma.h38
1 files changed, 36 insertions, 2 deletions
diff --git a/include/trace/events/rpcrdma.h b/include/trace/events/rpcrdma.h
index 83c4dfd7feea..a13830616107 100644
--- a/include/trace/events/rpcrdma.h
+++ b/include/trace/events/rpcrdma.h
@@ -451,16 +451,50 @@ TRACE_EVENT(xprtrdma_createmrs,
TP_STRUCT__entry(
__field(const void *, r_xprt)
+ __string(addr, rpcrdma_addrstr(r_xprt))
+ __string(port, rpcrdma_portstr(r_xprt))
__field(unsigned int, count)
),
TP_fast_assign(
__entry->r_xprt = r_xprt;
__entry->count = count;
+ __assign_str(addr, rpcrdma_addrstr(r_xprt));
+ __assign_str(port, rpcrdma_portstr(r_xprt));
),
- TP_printk("r_xprt=%p: created %u MRs",
- __entry->r_xprt, __entry->count
+ TP_printk("peer=[%s]:%s r_xprt=%p: created %u MRs",
+ __get_str(addr), __get_str(port), __entry->r_xprt,
+ __entry->count
+ )
+);
+
+TRACE_EVENT(xprtrdma_mr_get,
+ TP_PROTO(
+ const struct rpcrdma_req *req
+ ),
+
+ TP_ARGS(req),
+
+ TP_STRUCT__entry(
+ __field(const void *, req)
+ __field(unsigned int, task_id)
+ __field(unsigned int, client_id)
+ __field(u32, xid)
+ ),
+
+ TP_fast_assign(
+ const struct rpc_rqst *rqst = &req->rl_slot;
+
+ __entry->req = req;
+ __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);
+ ),
+
+ TP_printk("task:%u@%u xid=0x%08x req=%p",
+ __entry->task_id, __entry->client_id, __entry->xid,
+ __entry->req
)
);