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Top Forums Shell Programming and Scripting Help with filtering trace file through grep Post 302455239 by saqibshah on Tuesday 21st of September 2010 06:43:01 AM
Old 09-21-2010
Help with filtering trace file through grep

Hi,
I am using NS2 and i need to filter a trace file (part of which is shown below):
- 33.91576 2 3 tcp 1040 ------- 1 0.0 4.0 1115 2258
r 33.918907 4 3 ack 40 ------- 1 4.0 0.0 1107 2272
+ 33.918907 3 2 ack 40 ------- 1 4.0 0.0 1107 2272
- 33.918907 3 2 ack 40 ------- 1 4.0 0.0 1107 2272
r 33.9192 2 0 ack 40 ------- 1 4.0 0.0 1103 2264
+ 33.9192 0 2 tcp 1040 ------- 1 0.0 4.0 1123 2275
- 33.9192 0 2 tcp 1040 ------- 1 0.0 4.0 1123 2275
r 33.93256 2 3 tcp 1040 ------- 1 0.0 4.0 1111 2250
+ 33.93256 3 4 tcp 1040 ------- 1 0.0 4.0 1111 2250
- 33.93256 3 4 tcp 1040 ------- 1 0.0 4.0 1111 225
........................

The file needs to be filtered such that column number 3 should only contain "3" and column number 1 should only contain "r" using GREP (or awk).

Any help is greatly appreciated!
 

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TRACE-CMD-STOP(1)														 TRACE-CMD-STOP(1)

NAME
trace-cmd-stop - stop the Ftrace Linux kernel tracer from writing to the ring buffer. SYNOPSIS
trace-cmd stop DESCRIPTION
The trace-cmd(1) stop is a complement to trace-cmd-start(1). This will disable Ftrace from writing to the ring buffer. This does not stop the overhead that the tracing may incur. Only the updating of the ring buffer is disabled, the Ftrace tracing may still be inducing overhead. After stopping the trace, the trace-cmd-extract(1) may strip out the data from the ring buffer and create a trace.dat file. The Ftrace pseudo file system may also be examined. To disable the tracing completely to remove the overhead it causes, use trace-cmd-reset(1). But after a reset is performed, the data that has been recorded is lost. SEE ALSO
trace-cmd(1), trace-cmd-record(1), trace-cmd-report(1), trace-cmd-start(1), trace-cmd-extract(1), trace-cmd-reset(1), trace-cmd-split(1), trace-cmd-list(1), trace-cmd-listen(1) AUTHOR
Written by Steven Rostedt, <rostedt@goodmis.org[1]> RESOURCES
git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/trace-cmd.git COPYING
Copyright (C) 2010 Red Hat, Inc. Free use of this software is granted under the terms of the GNU Public License (GPL). NOTES
1. rostedt@goodmis.org mailto:rostedt@goodmis.org 06/11/2014 TRACE-CMD-STOP(1)
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