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Shell Programming and Scripting
Optimizing the Shell Script [Expert Advise Needed]
Post 303007756 by Scott on Tuesday 21st of November 2017 05:47:10 AM
11-21-2017
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LEARN ABOUT FREEBSD
strace-log-merge
STRACE-LOG-MERGE(1) General Commands Manual STRACE-LOG-MERGE(1) NAME
strace-log-merge - merge strace -ff -tt output SYNOPSIS
strace-log-merge STRACE_LOG strace-log-merge --help DESCRIPTION
strace-log-merge merges the output of strace -ff -tt[t] command, prepending PID to each line and sorting the result using time stamp as a key. OPTIONS
--help Show program usage and exit. STRACE_LOG Output file name prefix of files produced by a strace -ff -tt[t] command. EXIT STATUS
0 Success Non-zero Error occurred: either no argument specified (in that case a usage is printed), or something went wrong during the processing of STRACE_LOG.* files. USAGE EXAMPLE
$ strace -o sleepy -ff -tt -e trace=execve,nanosleep sh -c 'sleep 0.1 & sleep 0.2 & sleep 0.3' $ strace-log-merge sleepy | fold -w 72 -s 13475 21:13:52.040837 execve("/bin/sh", ["sh", "-c", "sleep 0.1 & sleep 0.2 & sleep 0."...], 0x7ffde54b2450 /* 33 vars */) = 0 13478 21:13:52.044050 execve("/bin/sleep", ["sleep", "0.3"], 0x5631be4f87a8 /* 33 vars */) = 0 13476 21:13:52.044269 execve("/bin/sleep", ["sleep", "0.1"], 0x5631be4f87a8 /* 33 vars */) = 0 13477 21:13:52.044389 execve("/bin/sleep", ["sleep", "0.2"], 0x5631be4f87a8 /* 33 vars */) = 0 13478 21:13:52.046207 nanosleep({tv_sec=0, tv_nsec=300000000}, NULL) = 0 13476 21:13:52.046303 nanosleep({tv_sec=0, tv_nsec=100000000}, NULL) = 0 13477 21:13:52.046318 nanosleep({tv_sec=0, tv_nsec=200000000}, NULL) = 0 13476 21:13:52.146852 +++ exited with 0 +++ 13475 21:13:52.146942 --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=13476, si_uid=1000, si_status=0, si_utime=0, si_stime=0} --- 13477 21:13:52.247782 +++ exited with 0 +++ 13475 21:13:52.247885 --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=13477, si_uid=1000, si_status=0, si_utime=0, si_stime=0} --- 13478 21:13:52.347680 +++ exited with 0 +++ 13475 21:13:52.347786 --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=13478, si_uid=1000, si_status=0, si_utime=0, si_stime=0} --- 13475 21:13:52.348069 +++ exited with 0 +++ NOTES
strace-log-merge does not work well with strace logs generated by strace -tt invocation that pass midnight, as those lack the information required for the proper sorting. Employing the -ttt option in the respective strace invocation should solve the problem. BUGS
strace-log-merge does not perform any checks whether the files specified are in the correct format and implies that only files from a sin- gle strace session match STRACE_LOG.* glob pattern. HISTORY
The initial version of strace-log-merge was written by Denys Vlasenko in 2012. REPORTING BUGS
Problems with strace-log-merge should be reported to the strace mailing list at <strace-devel@lists.sourceforge.net>. SEE ALSO
strace(1) strace UNKNOWN 2018-04-11 STRACE-LOG-MERGE(1)