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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 © 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  Pub‐
       lic 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)

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