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SUNRPC: provide a mechanism for collecting stats in the RPC client

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Add a simple mechanism for collecting stats in the RPC client.  Stats are
tabulated during xprt_release.  Note that per_cpu shenanigans are not
required here because the RPC client already serializes on the transport
write lock.

Test plan:
Compile kernel with CONFIG_NFS enabled.  Basic performance regression
testing with high-speed networking and high performance server.

Signed-off-by: Chuck Lever <cel@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Chuck Lever
2006-03-20 13:44:22 -05:00
committed by Trond Myklebust
parent ef759a2e54
commit 11c556b3d8
5 changed files with 192 additions and 4 deletions
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2
net/sunrpc/xprt.c
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@@ -44,6 +44,7 @@
#include <linux/random.h>
#include <linux/sunrpc/clnt.h>
#include <linux/sunrpc/metrics.h>
/*
* Local variables
@@ -859,6 +860,7 @@ void xprt_release(struct rpc_task *task)
if (!(req = task->tk_rqstp))
return;
rpc_count_iostats(task);
spin_lock_bh(&xprt->transport_lock);
xprt->ops->release_xprt(xprt, task);
if (xprt->ops->release_request)