Re: [LTP] [PATCH] Add an Option '-K' to Create dmesg logs for each test

[Subrata Modak <subrata@linux.vnet.ibm.com>]

On Sun, 2010-05-09 at 23:56 +0530, Subrata Modak wrote:
> Hi,
> 
> Recently while running LTP , i found that the system had generated many
> kernel messages worth investigating. However, there was a loose gap to
> find out which test exactly was responsible for that message.
> 
> So, i thought it could be worth to create a framework in LTP to log kernel
> messages for each test, to pinpoint exact messages created per test, for
> better debugging. The following patch adds a option to LTP and runs a
> old style script ;-) to achieve that. All this is done at the runltp level
> without any distrubance to ltp-pan. Messages can be logged at:
> 1) Absolute path(s) as specified by the user, else
> 2) Inside $LTPROOT/output/
> 
> Comments welcome.
> 
> Signed-off-by: Subrata Modak <subrata@linux.vnet.ibm.com>
> ---
> 
> --- runltp.orig	2010-05-09 23:15:27.000000000 +0530
> +++ runltp	2010-05-09 23:44:53.000000000 +0530
> @@ -131,6 +131,8 @@ usage() 
>      -h              Help. Prints all available options.
>      -i NUM_PROCS    Run LTP under additional background Load on IO Bus
>                      [NUM_PROCS   = no. of processes creating IO Bus Load by spinning over sync()]
> +    -K DMESG_LOG_DIR
> +			Log Kernel messages generated for each test cases inside this directory 
>      -l LOGFILE      Log results of test in a logfile.
>      -m NUM_PROCS,CHUNKS,BYTES,HANGUP_FLAG
>                      Run LTP under additional background Load on Main memory (Seperate by comma)
> @@ -178,6 +180,7 @@ main()
>      local ALT_DIR_RES=0
>      local ALT_HTML_OUT=0
>      local ALT_EMAIL_OUT=0
> +    local ALT_DMESG_OUT=0
>      local RUN_NETEST=0
>      local RUN_REPEATED=0
>      local QUIET_MODE=""
> @@ -198,6 +201,7 @@ main()
>      local OUTPUTFILE=""
>      local HTMLFILE_NAME=""
>      local HTMLFILE=""
> +    local DMESG_DIR=""
>      local EMAIL_TO=""
>      local SCENFILES=""
>      local TAG_RESTRICT_STRING=""
> @@ -205,7 +209,7 @@ main()
>      local DEFAULT_FILE_NAME_GENERATION_TIME=`date +"%Y_%b_%d-%Hh_%Mm_%Ss"`
>      version_date=$(cat "$LTPROOT/Version")
> 
> -    while getopts a:c:C:d:D:f:F:ehi:g:l:m:M:Nno:pqr:s:S:t:T:w:x:b:B: arg
> +    while getopts a:c:C:d:D:f:F:ehi:K:g:l:m:M:Nno:pqr:s:S:t:T:w:x:b:B: arg
>      do  case $arg in
>          a)  EMAIL_TO=$OPTARG
>              ALT_EMAIL_OUT=1;;
> @@ -308,6 +312,15 @@ main()
>              $LTPROOT/testcases/bin/genload --io $NUM_PROCS >/dev/null 2>&1 &
>              GENLOAD=1 ;;
>      
> +        K)  
> +	    case $OPTARG in
> +        	   /*)
> +                	DMESG_DIR="$OPTARG-dmesg-output-`echo $$-``date +%X | tr -d ' '`";;
> +	            *)
> +        	        DMESG_DIR="$LTPROOT/output/$OPTARG-dmesg-output-`echo $$-``date +%X | tr -d ' '`";;
> +	    esac
> +            mkdir -p $DMESG_DIR
> +            ALT_DMESG_OUT=1;;
>          l)      
>              LOGFILE_NAME="$OPTARG"
>              case $OPTARG in
> @@ -821,6 +834,13 @@ main()
>  		fi
>  	fi
> 
> +	if [ $ALT_DMESG_OUT -eq 1 ] ; then
> +		#We want to print dmesg output for each test,lets do the trick inside the script
> +		echo Enabling dmesg output logging for each test...
> +		${LTPROOT}/bin/create_dmesg_entries_for_each_test.pl ${TMP}/alltests $DMESG_DIR > ${TMP}/alltests.tmp
> +		cp ${TMP}/alltests.tmp ${TMP}/alltests
> +		rm -rf ${TMP}/alltests.tmp
> +	fi
>      # Some tests need to run inside the "bin" directory.
>      cd "${LTPROOT}/testcases/bin"
>      "${LTPROOT}/bin/ltp-pan" $QUIET_MODE -e -S $INSTANCES $DURATION -a $$ -n $$ $PRETTY_PRT -f ${TMP}/alltests $LOGFILE $OUTPUTFILE $FAILCMDFILE
> diff -uprN tools.orig/create_dmesg_entries_for_each_test.pl tools/create_dmesg_entries_for_each_test.pl
> --- tools.orig/create_dmesg_entries_for_each_test.pl	1970-01-01 05:30:00.000000000 +0530
> +++ tools/create_dmesg_entries_for_each_test.pl	2010-05-09 23:38:10.000000000 +0530
> @@ -0,0 +1,74 @@
> +#!/usr/bin/perl
> +################################################################################
> +##                                                                            ##
> +## Copyright (c) International Business Machines  Corp., 2010                 ##
> +##                                                                            ##
> +## This program is free software;  you can redistribute it and/or modify      ##
> +## it under the terms of the GNU General Public License as published by       ##
> +## the Free Software Foundation; either version 2 of the License, or          ##
> +## (at your option) any later version.                                        ##
> +##                                                                            ##
> +## This program is distributed in the hope that it will be useful, but        ##
> +## WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY ##
> +## or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License   ##
> +## for more details.                                                          ##
> +##                                                                            ##
> +## You should have received a copy of the GNU General Public License          ##
> +## along with this program;  if not, write to the Free Software               ##
> +## Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA    ##
> +##                                                                            ##
> +################################################################################
> +#                                                                             ##
> +# File :        create_dmesg_entries_for_each_test.pl			      ##
> +#                                                                             ##
> +# Usage:        create_dmesg_entries_for_each_test.pl\			      ##
> +#		<LTP_COMMAND_FILE> <DMESG_DIRECTORY>			      ##
> +#                                                                             ##
> +# Description:  This is a simple perl script which will take ltp command file ##
> +#		as input and then create a final command file which will have ##
> +#		the following entries for each test tag:		      ##
> +#		<tag_name__with_dmesg_entry> <test_binary_name>;\	      ##
> +#		<save_dmesg_logs>			      		      ##
> +#                                                                             ##
> +# Author:       Subrata Modak <subrata@linux.vnet.ibm.com>                    ##
> +#                                                                             ##
> +# History:      May 09 2010 - Created - Subrata Modak.                        ##
> +################################################################################
> +
> +my $command_file	= shift (@ARGV) || syntax();
> +my $dmesg_dir		= shift (@ARGV) || syntax();
> +
> +sub syntax() {
> +	print "syntax: create_dmesg_entries_for_each_test.pl <LTP_COMMAND_FILE> <DMESG_DIRECTORY>\n";
> +	exit (1);
> +}
> +
> +
> +open (FILE, $command_file) || die "Cannot open file: $command_file\n";
> +while ($line = <FILE>) {
> +	if ($line =~ /^#/) {
> +		print "$line";
> +		next;
> +	}
> +	if ($line =~ /^\n$/) {
> +		next;
> +	}
> +	chomp $line;
> +	@tag_and_actual_command = split(/\ /, $line);
> +
> +	my $token_counter = 0;
> +	my $tag_name = "";
> +	foreach my $token (@tag_and_actual_command) {
> +		if ($token_counter == 0 ) {
> +			print $token . "__with_dmesg_entry" . " ";
> +			print "dmesg -c 1>/dev/null 2>/dev/null;" . " ";
> +			$token_counter++;
> +			$tag_name = $token;
> +			next;
> +		}
> +		print " " . $token . " ";
> +	}
> +	print "; dmesg > $dmesg_dir/$tag_name.dmesg.log \n";
> +}
> +close (FILE);
> +
> 
> ---
> Regards--
> Subrata
> 


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