92 lines
2.3 KiB
D
Executable File
92 lines
2.3 KiB
D
Executable File
#!/usr/sbin/dtrace -s
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/*
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* rfileio.d - read file I/O stats, with cache miss rate.
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* Written using DTrace (Solaris 10 3/05)
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*
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* This script provides statistics on the number of reads and the bytes
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* read from filesystems (logical), and the number of bytes read from
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* disk (physical). A summary is printed every five seconds by file.
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*
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* A total miss-rate is also provided for the file system cache.
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*
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* $Id: rfileio.d 3 2007-08-01 10:50:08Z brendan $
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*
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* USAGE: rfileio.d
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*
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* IDEA: Richard McDougall, Solaris Internals 2nd Ed, FS Chapter.
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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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* 19-Mar-2006 Brendan Gregg Created this.
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* 23-Apr-2006 " " Last update.
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*/
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#pragma D option quiet
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self int trace;
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uint64_t lbytes;
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uint64_t pbytes;
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dtrace:::BEGIN
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{
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trace("Tracing...\n");
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}
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fbt::fop_read:entry
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/self->trace == 0 && args[0]->v_path/
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{
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self->pathname = cleanpath(args[0]->v_path);
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@rio[self->pathname, "logical"] = count();
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lbytes += args[1]->uio_resid;
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self->size = args[1]->uio_resid;
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self->uiop = args[1];
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}
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fbt::fop_read:return
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/self->size/
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{
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@rbytes[self->pathname, "logical"] =
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sum(self->size - self->uiop->uio_resid);
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self->size = 0;
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self->uiop = 0;
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self->pathname = 0;
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}
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io::bdev_strategy:start
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/self->size && args[0]->b_flags & B_READ/
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{
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@rio[self->pathname, "physical"] = count();
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@rbytes[self->pathname, "physical"] = sum(args[0]->b_bcount);
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pbytes += args[0]->b_bcount;
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}
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profile:::tick-5s
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{
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trunc(@rio, 20);
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trunc(@rbytes, 20);
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printf("\033[H\033[2J");
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printf("\nRead IOPS, top 20 (count)\n");
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printa("%-54s %10s %10@d\n", @rio);
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printf("\nRead Bandwidth, top 20 (bytes)\n");
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printa("%-54s %10s %10@d\n", @rbytes);
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printf("\nTotal File System miss-rate: %d%%\n",
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lbytes ? 100 * pbytes / lbytes : 0);
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trunc(@rbytes);
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trunc(@rio);
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lbytes = pbytes = 0;
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}
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