NAME

       btrace - perform live tracing for block devices

SYNOPSIS

       btrace [-s] [-t] [-w N] [-n N] [-b N] [-r <dbg mnt>] [-a <trace>...] <dev>...

DESCRIPTION

       The  btrace  script provides a quick and easy way to do live tracing of block devices.  It calls blktrace
       on the specified devices and pipes the output through blkparse for formatting.  See blktrace (8) for more
       in-depth information about how blktrace works.

OPTIONS

       -s Displays data sorted by program (see blkparse (1)).

       -t Displays time deltas per IO (see blkparse (1)).

       -w N Sets run time to the number of seconds specified (see blktrace (8)).

       -n N Specifies the number of buffers to use (see blktrace (8)).

       -b N Specifies buffer size for event extraction (scaled by 1024) (see blktrace (8)).

       -r <dbg mnt> Specifies the debugfs mountpoint.

       -a <trace>...  Adds mask to current filter (see blktrace (8)).

       <dev> Specifies the device to trace.

EXAMPLE

       Simply running

           % btrace /dev/sda

       will show a trace of the device /dev/sda.

AUTHORS

       blkparse  was  written  by Jens Axboe, Alan D. Brunelle and Nathan Scott.  This man page was created from
       the blktrace documentation by Bas Zoetekouw.

REPORTING BUGS

       Report bugs to <linux-btrace@vger.kernel.org>

COPYRIGHT

       Copyright © 2006 Jens Axboe, Alan D. Brunelle and Nathan Scott.
       This is free software.  You may redistribute copies of it under the  terms  of  the  GNU  General  Public
       License <http://www.gnu.org/licenses/gpl.html>.  There is NO WARRANTY, to the extent permitted by law.
       This manual page was created for Debian by Bas Zoetekouw.  It was derived from the documentation provided
       by the authors and it may be used, distributed and modified under the terms of  the  GNU  General  Public
       License, version 2.
       On   Debian   systems,   the   text   of   the   GNU   General   Public   License   can   be   found   in
       /usr/share/common-licenses/GPL-2.

SEE ALSO

       blktrace (8), blkparse (1), verify_blkparse (1), blkrawverify (1), btt (1)