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authorChuck Lever <chuck.lever@oracle.com>2021-04-19 21:03:31 +0300
committerTrond Myklebust <trond.myklebust@hammerspace.com>2021-04-26 16:25:58 +0300
commit4ddd0fc32c94fbb77a8c0728dc507b2bdcc67edc (patch)
tree76396bd3fad4a84ff772be093e39cff70f1f280d /include/trace
parentb3ce7a25f44f03d481d12a17768cfce18b942ec2 (diff)
downloadlinux-4ddd0fc32c94fbb77a8c0728dc507b2bdcc67edc.tar.xz
xprtrdma: Add tracepoints showing FastReg WRs and remote invalidation
The Send signaling logic is a little subtle, so add some observability around it. For every xprtrdma_mr_fastreg event, there should be an xprtrdma_mr_localinv or xprtrdma_mr_reminv event. When these tracepoints are enabled, we can see exactly when an MR is DMA-mapped, registered, invalidated (either locally or remotely) and then DMA-unmapped. kworker/u25:2-190 [000] 787.979512: xprtrdma_mr_map: task:351@5 mr.id=4 nents=2 5608@0x8679e0c8f6f56000:0x00000503 (TO_DEVICE) kworker/u25:2-190 [000] 787.979515: xprtrdma_chunk_read: task:351@5 pos=148 5608@0x8679e0c8f6f56000:0x00000503 (last) kworker/u25:2-190 [000] 787.979519: xprtrdma_marshal: task:351@5 xid=0x8679e0c8: hdr=52 xdr=148/5608/0 read list/inline kworker/u25:2-190 [000] 787.979525: xprtrdma_mr_fastreg: task:351@5 mr.id=4 nents=2 5608@0x8679e0c8f6f56000:0x00000503 (TO_DEVICE) kworker/u25:2-190 [000] 787.979526: xprtrdma_post_send: task:351@5 cq.id=0 cid=73 (2 SGEs) ... kworker/5:1H-219 [005] 787.980567: xprtrdma_wc_receive: cq.id=1 cid=161 status=SUCCESS (0/0x0) received=164 kworker/5:1H-219 [005] 787.980571: xprtrdma_post_recvs: peer=[192.168.100.55]:20049 r_xprt=0xffff8884974d4000: 0 new recvs, 70 active (rc 0) kworker/5:1H-219 [005] 787.980573: xprtrdma_reply: task:351@5 xid=0x8679e0c8 credits=64 kworker/5:1H-219 [005] 787.980576: xprtrdma_mr_reminv: task:351@5 mr.id=4 nents=2 5608@0x8679e0c8f6f56000:0x00000503 (TO_DEVICE) kworker/5:1H-219 [005] 787.980577: xprtrdma_mr_unmap: mr.id=4 nents=2 5608@0x8679e0c8f6f56000:0x00000503 (TO_DEVICE) Note that I've moved the xprtrdma_post_send tracepoint so that event always appears after the xprtrdma_mr_fastreg tracepoint. Otherwise the event log looks counterintuitive (FastReg is always supposed to happen before Send). Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Diffstat (limited to 'include/trace')
-rw-r--r--include/trace/events/rpcrdma.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/trace/events/rpcrdma.h b/include/trace/events/rpcrdma.h
index e38e745d13b0..9462326b3535 100644
--- a/include/trace/events/rpcrdma.h
+++ b/include/trace/events/rpcrdma.h
@@ -1010,7 +1010,9 @@ TRACE_EVENT(xprtrdma_frwr_maperr,
)
);
+DEFINE_MR_EVENT(fastreg);
DEFINE_MR_EVENT(localinv);
+DEFINE_MR_EVENT(reminv);
DEFINE_MR_EVENT(map);
DEFINE_ANON_MR_EVENT(unmap);