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2016-11-06task-time: Add simple buildstats analysis scriptUlf Magnusson1
The 'task-time' Python script is used for simple manual analysis of buildstats. It displays task timing information in the same format (and using the same calculation) as the Bash 'time' builtin, and can optionally sort tasks by real (wall-clock), user (user space CPU), or sys (kernel CPU) time used. The timing information comes from the getrusage(2) fields added by commit adfdca4df18f ("buildstats: Improve to add getrusage data and corrected IO stats"). That commit is required for the script to work. Example 1: Running 'task-time' on a specific task buildstat: $ task-time ./20161005235448/gettext-0.16.1-r6/do_compile ./20161005235448/gettext-0.16.1-r6/do_compile: real 0m54.560s user 0m46.028s sys 0m2.772s Example 2: Running 'task-time' on a directory, sorting on wall-clock time: $ task-time tmp/buildstats/20161018083535 --sort real tmp/buildstats/20161018083535/bash-4.3.30-r0/do_fetch: real 10m59.140s user 0m1.152s sys 0m0.320s tmp/buildstats/20161018083535/readline-native-6.3-r0/do_fetch: real 8m57.310s user 0m0.860s sys 0m0.288s tmp/buildstats/20161018083535/perl-5.22.1-r0/do_compile: real 4m28.840s user 4m1.348s sys 0m15.816s ... Example 3: Running 'task-time' on all do_compile buildstats for a particular build by using shell globbing, sorting on user space CPU time: $ task-time tmp/buildstats/20161018083535/*/do_compile --sort user tmp/buildstats/20161018083535/qemu-native-2.7.0-r1/do_compile: real 0m49.570s user 21m45.236s sys 1m44.380s tmp/buildstats/20161018083535/linux-yocto-4.8+gitAUTOINC+03bf3dd731_67813e7efa-r0/do_compile: real 0m49.530s user 21m39.588s sys 1m59.576s tmp/buildstats/20161018083535/gcc-cross-i586-6.2.0-r0/do_compile: real 1m8.130s user 15m54.256s sys 1m28.776s ... Example 4: Comparing a task between two builds: $ task-time 201610052{25856,35448}/gettext-0*/do_compile --sort real 20161005235448/gettext-0.16.1-r6/do_compile: real 0m54.560s user 0m46.028s sys 0m2.772s 20161005225856/gettext-0.19.8.1-r0/do_compile: real 0m41.520s user 2m17.312s sys 0m7.536s Signed-off-by: Ulf Magnusson <ulfalizer@gmail.com> Signed-off-by: Ross Burton <ross.burton@intel.com>