1N/A#!/usr/sbin/dtrace -s
1N/A/*
1N/A * iofile.d - I/O wait time by filename and process.
1N/A * Written using DTrace (Solaris 10 3/05).
1N/A *
1N/A * This prints the total I/O wait times for each filename by process.
1N/A * This can help determine why an application is performing poorly by
1N/A * identifying which file they are waiting on, and the total times.
1N/A * Both disk and NFS I/O are measured.
1N/A *
1N/A * $Id: iofile.d 3 2007-08-01 10:50:08Z brendan $
1N/A *
1N/A * USAGE: iofile.d # wait, then hit Ctrl-C to end
1N/A *
1N/A * FIELDS:
1N/A * PID Process ID
1N/A * CMD Process name
1N/A * TIME Total wait time for disk events, us
1N/A * FILE File pathname
1N/A *
1N/A * BASED ON: /usr/demo/dtrace/iocpu.d
1N/A *
1N/A * SEE ALSO: iosnoop, iotop
1N/A *
1N/A * PORTIONS: Copyright (c) 2005, 2006 Brendan Gregg.
1N/A *
1N/A * CDDL HEADER START
1N/A *
1N/A * The contents of this file are subject to the terms of the
1N/A * Common Development and Distribution License, Version 1.0 only
1N/A * (the "License"). You may not use this file except in compliance
1N/A * with the License.
1N/A *
1N/A * You can obtain a copy of the license at Docs/cddl1.txt
1N/A * or http://www.opensolaris.org/os/licensing.
1N/A * See the License for the specific language governing permissions
1N/A * and limitations under the License.
1N/A *
1N/A * CDDL HEADER END
1N/A *
1N/A * 24-Jul-2005 Brendan Gregg Created this.
1N/A * 20-Apr-2006 " " Last update.
1N/A */
1N/A
1N/A#pragma D option quiet
1N/A
1N/A/* print header */
1N/Adtrace:::BEGIN
1N/A{
1N/A printf("Tracing... Hit Ctrl-C to end.\n");
1N/A}
1N/A
1N/A/* save time at start */
1N/Aio:::wait-start
1N/A{
1N/A self->start = timestamp;
1N/A}
1N/A
1N/A/* process event */
1N/Aio:::wait-done
1N/A/self->start/
1N/A{
1N/A /*
1N/A * wait-done is used as we are measing wait times. It also
1N/A * is triggered when the correct thread is on the CPU, obviating
1N/A * the need to link process details to the start event.
1N/A */
1N/A this->elapsed = timestamp - self->start;
1N/A @files[pid, execname, args[2]->fi_pathname] = sum(this->elapsed);
1N/A self->start = 0;
1N/A}
1N/A
1N/A/* print report */
1N/Adtrace:::END
1N/A{
1N/A normalize(@files, 1000);
1N/A printf("%6s %-12s %8s %s\n", "PID", "CMD", "TIME", "FILE");
1N/A printa("%6d %-12.12s %@8d %s\n", @files);
1N/A}