diff options
| author | Chuck Lever <chuck.lever@oracle.com> | 2018-03-05 15:13:07 -0500 |
|---|---|---|
| committer | Anna Schumaker <Anna.Schumaker@Netapp.com> | 2018-04-10 16:06:22 -0400 |
| commit | 78215759e20d859b8f1de7d0aebd08878fbc4eed (patch) | |
| tree | 8817e841aacc3cd1272679b0cf11345000fff89a /net/sunrpc/xprtsock.c | |
| parent | 0b87a46b437c1629bc7d79f3c5a0ba3608c37544 (diff) | |
SUNRPC: Make RTT measurement more precise (Send)
Some RPC transports have more overhead in their send_request
callouts than others. For example, for RPC-over-RDMA:
- Marshaling an RPC often has to DMA map the RPC arguments
- Registration methods perform memory registration as part of
marshaling
To capture just server and network latencies more precisely: when
sending a Call, capture the rq_xtime timestamp _after_ the transport
header has been marshaled.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Diffstat (limited to 'net/sunrpc/xprtsock.c')
| -rw-r--r-- | net/sunrpc/xprtsock.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/net/sunrpc/xprtsock.c b/net/sunrpc/xprtsock.c index 61df77f41304..e3c6a3df278b 100644 --- a/net/sunrpc/xprtsock.c +++ b/net/sunrpc/xprtsock.c @@ -527,6 +527,7 @@ static int xs_local_send_request(struct rpc_task *task) xs_pktdump("packet data:", req->rq_svec->iov_base, req->rq_svec->iov_len); + req->rq_xtime = ktime_get(); status = xs_sendpages(transport->sock, NULL, 0, xdr, req->rq_bytes_sent, true, &sent); dprintk("RPC: %s(%u) = %d\n", @@ -589,6 +590,7 @@ static int xs_udp_send_request(struct rpc_task *task) if (!xprt_bound(xprt)) return -ENOTCONN; + req->rq_xtime = ktime_get(); status = xs_sendpages(transport->sock, xs_addr(xprt), xprt->addrlen, xdr, req->rq_bytes_sent, true, &sent); @@ -678,6 +680,7 @@ static int xs_tcp_send_request(struct rpc_task *task) /* Continue transmitting the packet/record. We must be careful * to cope with writespace callbacks arriving _after_ we have * called sendmsg(). */ + req->rq_xtime = ktime_get(); while (1) { sent = 0; status = xs_sendpages(transport->sock, NULL, 0, xdr, |