Cleaned out the btt/README file.

The documentation under btt/doc/btt.tex is current, while this is woefully
out of date.

Signed-off-by: Alan D. Brunelle <Alan.Brunelle@hp.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

diff --git a/btt/README b/btt/README
index 3ae7779ad43d974aeb772ffecc0e8adbb85f7503..c395a6779d49cdeabc2bc636660cdaafb5ce8e74 100644 (file)
--- a/btt/README
+++ b/btt/README
@@ -3,77 +3,7 @@ blktrace Timeline
 
 Alan D. Brunelle (initial version)
 
-Usage
------
-
-Usage: btt
-       [ -d <seconds>     | --range-delta=<seconds> ]
-       [ -D <dev;...>     | --devices=<dev;...> ]
-       [ -e <exe,...>     | --exes=<exe,...>  ]
-       [ -h               | --help ]
-       [ -i <input name>  | --input-file=<input name> ]
-       [ -I <output name> | --iostat=<output name> ]
-       [ -l <output name> | --d2c-latencies=<output name> ]
-       [ -M <dev map>     | --dev-maps=<dev map>
-       [ -o <output name> | --output-file=<output name> ]
-       [ -p <output name> | --per-io-dump=<output name> ]
-       [ -q <output name> | --q2c-latencies=<output name> ]
-       [ -s <output name> | --seeks=<output name> ]
-       [ -S <interval>    | --iostat-interval=<interval> ]
-       [ -t <sec>         | --time-start=<sec> ]
-       [ -T <sec>         | --time-end=<sec> ]
-       [ -V               | --version ]
-       [ -v               | --verbose ]
-
-You are required to specify an input file (-i)
-
-The -d option allows you to specify the granularity which determines
-"activity" with regard to the .dat files -- this specific the time
-(in seconds) that must elapse without a particular event occuring to
-signify inactivity. The larger the number, the fewer ranges output --
-the default is 0.1 seconds.
-
-The -D option supplies the devices which should be looked at when
-analyzing the input. This is a ":" separated list of devices, devices are
-specified by a mjr,mnr tuple (e.g.: -D "8,0:8,8" specifies two devices
-with major 8 and minor 0 and 8 respectively).
-
-The -e option supplies the list of executables that will have I/Os
-analyzed.
-
-The -I option directs btt to output iostat-like data to the specified
-file.  Refer to the iostat (sysstat) documentation for details on the
-data columns. The -S option specifies the interval to use between data
-output, it defaults to once per second.
-
-The -l and -q options allow one to output per-IO D2C and Q2C latencies
-respectively. The supplied argument provides the basis for the output
-name for each device.
-
-The -M option takes in a file generated by the provided script
-(gen_disk_info.py), and allows for better output of device names.
-
-The -p option will generate a file that contains a list of all IO
-"sequences" - showing the parts of each IO (Q, A, I/M, D, & C).
-
-The -s option instructs btt to output seek data, the argument provided
-is the basis for file names output. There are two files per device,
-read seeks and write seeks.
-
-The -t/-T options allow one to set a start and/or end time for analyzing
-- analyzing will only be done for traces after -t's argument and before
--T's argument. (-t and -T are optional, so if you specify just -t,
-analysis will occur for all traces after the time specified. Similarly,
-if only -T is specified, analysis stops after -T's seconds.)
-
-Overview
---------
-
-btt will take in binary dump data from blkparse, and analyze the events,
-producing a series of output from the analysis. It will also build .dat
-files containing "range data" -- showing things like Q activity (periods
-of time while Q events are being produced), C activity (likewise for
-command completions), and etc.
+Please refer to the documentation for details.
 
 Resources
 ---------
@@ -83,4 +13,5 @@ The list is called linux-btrace@vger.kernel.org, subscribe by sending
 a mail to majordomo@vger.kernel.org with 'subscribe linux-btrace' in
 the mail body.
 
-2006-09_18, Alan D. Brunelle <alan.brunelle@hp.com>
+2006-04-16, Alan D. Brunelle <Alan.Brunelle@hp.com>
+