BTRACE(8)																 BTRACE(8)

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 (C) 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)

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