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