btrace - perform live tracing for block devices

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

       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.

       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.

       Simply running

           % btrace /dev/sda

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

       btrace - perform live tracing for block devices

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

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

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

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

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

       -r<dbgmnt> Specifies the debugfs mountpoint.

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

       <dev> Specifies the device to trace.

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

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

blktrace git-20070306202522                      March  6, 2007                                        BTRACE(8)

btrace[-s][-t][-wN][-nN] [-b N] [-r <dbgmnt>] [-a <trace>...] <dev>...