Usage: blkparse 

-i <file>           | --input=<file>
[ -a <action field> | --act-mask=<action field> ]
[ -A <action mask>  | --set-mask=<action mask> ]
[ -b <traces>       | --batch=<traces> ]
[ -d <file>         | --dump-binary=<file> ]
[ -D <dir>          | --input-directory=<dir> ]
[ -f <format>       | --format=<format> ]
[ -F <spec>         | --format-spec=<spec> ]
[ -h                | --hash-by-name ]
[ -o <file>         | --output=<file> ]
[ -O                | --no-text-output ]
[ -q                | --quiet ]
[ -s                | --per-program-stats ]
[ -S <event>        | --sort-program-stats=<event> ]
[ -t                | --track-ios ]
[ -w <time>         | --stopwatch=<time> ]
[ -M                | --no-msgs
[ -v                | --verbose ]
[ -V                | --version ]

	-a Only trace specified actions. See documentation
	-A Give trace mask as a single value. See documentation
	-b stdin read batching
	-d Output file. If specified, binary data is written to file
	-D Directory to prepend to input file names
	-f Output format. Customize the output format. The format field
	   identifies can be found in the documentation
	-F Format specification. Can be found in the documentation
	-h Hash processes by name, not pid
	-i Input file containing trace data, or '-' for stdin
	-o Output file. If not given, output is stdout
	-O Do NOT output text data
	-q Quiet. Don't display any stats at the end of the trace
	-s Show per-program io statistics
	-S Show per-program io statistics sorted by N/Q/q/R/r/W/w/C/c
	   N:Name, Q/q:Queued(read & write), R/r:Queued Read, W/w:Queued Write, C/c:Complete.
	   Sort programs by how much data(KB): Q,R,W,C.
	   Sort programs by how many IO operations: q,r,w,c.
	   if -S was used, the -s parameter will be ignored.
	-t Track individual ios. Will tell you the time a request took
	   to get queued, to get dispatched, and to get completed
	-w Only parse data between the given time interval in seconds.
	   If 'start' isn't given, blkparse defaults the start time to 0
	-M Do not output messages to binary file
	-v More verbose for marginal errors
	-V Print program version info