# [OmniOS-discuss] Dtrace not working

Matthew Lagoe matthew.lagoe at subrigo.net
Fri May 16 14:03:29 UTC 2014

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    I am looking at moving from openindiana to omnios and I have a dtrace script
    (below) that works on openindiana however I have tried running it on the
    latest omnios r151010 and it doesn't run with the error ": No such file or
    directory"

    I am running it with ./wfileio.d, the other DTT scripts seem to work fine

    When I run it with dtrace -s wfileio.d I also get an error "dtrace: failed
    to compile script wfileio.d: line 39: failed to set option 'quiet': Invalid
    option name

    #!/usr/sbin/dtrace -s

    /*

    * wfileio.d - write file I/O stats, with cache miss rate.

    *             Written using DTrace (Solaris 10 3/05)

    *

    * This script provides statistics on the number of reads and the bytes

    * read from filesystems (logical), and the number of bytes read from

    * disk (physical). A summary is printed every five seconds by file.

    *

    * A total miss-rate is also provided for the file system cache.

    *

    * $Id: wfileio.d 3 2007-08-01 10:50:08Z brendan $

    *

    * USAGE:            wfileio.d

    *

    * IDEA: Richard McDougall, Solaris Internals 2nd Ed, FS Chapter.

    *

    * COPYRIGHT: Copyright (c) 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

    *

    * 19-Mar-2006  Brendan Gregg   Created this.

    * 23-Apr-2006      "      "   Last update.

    * 20-Mar-2014  Linda Kateley     Modified into writes

    */

    #pragma D option quiet

    self int trace;

    uint64_t lbytes;

    uint64_t pbytes;

    dtrace:::BEGIN

    {

                    trace("Tracing...\n");

    }

    fbt::fop_write:entry

    /self->trace == 0 && args[0]->v_path/

    {

                    self->pathname = cleanpath(args[0]->v_path);

                    @wio[self->pathname, "logical"] = count();

                    lbytes += args[1]->uio_resid;

                    self->size = args[1]->uio_resid;

                    self->uiop = args[1];

    }

    fbt::fop_write:return

    /self->size/

    {

                    @wbytes[self->pathname, "logical"] =

                        sum(self->size - self->uiop->uio_resid);

                    self->size = 0;

                    self->uiop = 0;

                    self->pathname = 0;

    }

    io::bdev_strategy:start

    /self->size && args[0]->b_flags & B_READ/

    {

                    @wio[self->pathname, "physical"] = count();

                    @wbytes[self->pathname, "physical"] =
    sum(args[0]->b_bcount);

                    pbytes += args[0]->b_bcount;

    }

    profile:::tick-5s

    {

                    trunc(@wio, 20);

                    trunc(@wbytes, 20);

                    printf("\033[H\033[2J");

                    printf("\nWrit IOPS, top 20 (count)\n");

                    printa("%-54s %10s %10 at d\n", @wio);

                    printf("\nWrite Bandwidth, top 20 (bytes)\n");

                    printa("%-54s %10s %10 at d\n", @wbytes);

                    trunc(@wio);

    }

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