SUNRPC: Make RTT measurement more precise (Send)

Browse source

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>

...

This commit is contained in:

Chuck Lever 2018-03-05 15:13:07 -05:00 • committed by Anna Schumaker

parent 0b87a46b43

commit 78215759e2

3 changed files with 4 additions and 1 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

1

net/sunrpc/xprt.c

View file

1

net/sunrpc/xprtrdma/transport.c

View file

3

net/sunrpc/xprtsock.c

View file