Infrastructure load for January 2010


The number of pushes continued trending downward, maybe related to the Firefox 3.6.0 and Fennec 1.0 releases that month. Meanwhile, our overall infrastructure load went up, almost doubling. This was caused by RelEng filling out all the different project branches to run the same unittests/performance suites, a frequent request by developers, and also by running Talos on new additional OS.

  • The numbers for this month are:
    • 1,189 code changes to our mercurial-based repos, which triggered:
    • 13,853 build jobs, or ~92 jobs per hour.
    • 54,786 unittest jobs, or ~73 jobs per hour.
    • 56,192 talos jobs, or ~76 talos jobs per hour.
  • Our Unittest and Talos load almost doubled this month – caused by adding Talos on OSX10.6, filling out Talos on linux64, and getting full compliment of Unittest and Talos running on all project branches. There are more OS still being added to Talos, so expect this to jump again soon.
  • Different project branches continue to get different load at different times. This is to be expected when you consider that developers change from one focus area to another as projects wrap up, and other projects start up. However, the barcharts below illustrate that nicely.
  • The trend of “what time of day is busiest” changed again this month. Not sure what this means, but worth pointing out that each month seems to be different. This makes finding a “good” time for a downtime almost impossible.
  • We are still not tracking down any l10n repacks, nightly builds, release builds or any “idle-timer” builds.

Detailed breakdown is :

Here’s how the math works out (Descriptions of build, unittest and performance jobs triggered by each individual push are here:

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