Date: Fri, 18 May 2012 16:47:16 +0000 (UTC) From: "George V. Neville-Neil" <gnn@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r235614 - head/share/dtrace Message-ID: <201205181647.q4IGlGEL063848@svn.freebsd.org>
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Author: gnn Date: Fri May 18 16:47:15 2012 New Revision: 235614 URL: http://svn.freebsd.org/changeset/base/235614 Log: Add a DTrace script to show the frequency and latency of NFS client calls. Submitted by: rwatson Added: head/share/dtrace/nfsclienttime (contents, props changed) Added: head/share/dtrace/nfsclienttime ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ head/share/dtrace/nfsclienttime Fri May 18 16:47:15 2012 (r235614) @@ -0,0 +1,74 @@ +#!/bin/sh +# +# Copyright (c) 2012 Robert N. M. Watson +# All rights reserved. +# +# This software was developed at the University of Cambridge Computer +# Laboratory with support from a grant from Google, Inc. +# +# Redistribution and use in source and binary forms, with or without +# modification, are permitted provided that the following conditions +# are met: +# 1. Redistributions of source code must retain the above copyright +# notice, this list of conditions and the following disclaimer. +# 2. Redistributions in binary form must reproduce the above copyright +# notice, this list of conditions and the following disclaimer in the +# documentation and/or other materials provided with the distribution. +# +# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND +# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE +# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE +# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE +# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL +# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS +# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) +# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT +# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY +# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF +# SUCH DAMAGE. +# +# $FreeBSD$ +# +# This script measures all time spent waiting on RPC replies for each +# system call, and then generates a histogram of those times sorted by +# system call name. +# +# Currently only supports NFSv3 +# +# Usage: nfsclienttime +# +# Press Ctrl-C to exit and display statistics. +# + +/usr/sbin/dtrace -n ' +#pragma D option quiet + +dtrace:::BEGIN +{ + printf("Collecting data...press Ctrl-C to exit.\n"); +} + +syscall:::entry +{ + + self->count = 0; +} + +nfsclient:nfs3::start +{ + + self->timestamp = timestamp; +} + +nfsclient:nfs3::done +{ + + self->count += (timestamp - self->timestamp); +} + +syscall:::return +/self->count != 0/ { + + @syscalls[probefunc] = quantize(self->count); +} +'
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