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82 lines
2.0 KiB
D
Executable File
82 lines
2.0 KiB
D
Executable File
#!/usr/sbin/dtrace -s
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/*
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* bitesize.d - analyse disk I/O size by process.
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* Written using DTrace (Solaris 10 3/05).
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*
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* This produces a report for the size of disk events caused by
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* processes. These are the disk events sent by the block I/O driver.
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*
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* If applications must use the disks, we generally prefer they do so
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* with large I/O sizes.
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*
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* $Id: bitesize.d,v 1.1.1.1 2015/09/30 22:01:07 christos Exp $
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*
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* USAGE: bitesize.d # wait several seconds, then hit Ctrl-C
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*
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* FIELDS:
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* PID process ID
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* CMD command and argument list
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* value size in bytes
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* count number of I/O operations
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*
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* NOTES:
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*
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* The application may be requesting smaller sized operations, which
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* are being rounded up to the nearest sector size or UFS block size.
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* To analyse what the application is requesting, DTraceToolkit programs
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* such as Proc/fddist may help.
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*
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* SEE ALSO: seeksize.d, iosnoop
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*
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* COPYRIGHT: Copyright (c) 2006 Brendan Gregg.
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*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License, Version 1.0 only
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* (the "License"). You may not use this file except in compliance
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* with the License.
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*
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* You can obtain a copy of the license at Docs/cddl1.txt
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* or http://www.opensolaris.org/os/licensing.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* CDDL HEADER END
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*
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* 31-Mar-2004 Brendan Gregg Created this, build 51.
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* 10-Oct-2004 " " Rewrote to use the io provider, build 63.
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* 18-Feb-2006 " " Last update.
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*/
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#pragma D option quiet
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/*
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* Print header
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*/
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dtrace:::BEGIN
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{
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printf("Tracing... Hit Ctrl-C to end.\n");
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}
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/*
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* Process io start
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*/
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io:::start
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{
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/* fetch details */
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this->size = args[0]->b_bcount;
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/* store details */
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@Size[pid, curpsinfo->pr_psargs] = quantize(this->size);
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}
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/*
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* Print final report
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*/
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dtrace:::END
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{
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printf("\n%8s %s\n", "PID", "CMD");
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printa("%8d %S\n%@d\n", @Size);
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}
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