iirc we discussed this on the whiteboard at the first work week, but to refresh: The OS/platform/architecture values for a job can actually be referring to several things... 1) The os/platform/arch of the machine that ran the compilation of the build 2) The os/platform/arch of the target device that will run the build 3) The os/platform/arch of the machine that ran the tests Example: An Android build is compiled on a Linux64 machine (#1), targeted at Android ARMv7 (#2), and then tests get run on it on Android 4.0 Pandaboards (#3). For a build job of this type, I would expect a job arch/platform of "armv7"/"Android" and a machine arch/platform of "x86_64"/"Linux". For the test job run on a pandaboard, I would expect a job arch/platform of "armv7"/"Android 4.0", an identical machine arch/platform of "armv7"/"Android 4.0". Whilst doing bug 1040418 I noticed that we do: platform_info = buildbot.extract_platform_info(prop['buildername']) ... #build_platform same as machine_platform 'build_platform': { #platform attributes sometimes parse without results 'os_name': platform_info.get('os', ''), 'platform': platform_info.get('os_platform', ''), 'architecture': platform_info.get('arch', '') }, 'machine_platform': { 'os_name': platform_info.get('os', ''), 'platform': platform_info.get('os_platform', ''), 'architecture': platform_info.get('arch', '') }, Which is setting machine_platform to the same values as build_platform.

Is machine_platform used for anything at present? If it's not surfaced in the UI and isn't affecting the handling of results, this doesn't have to block.

The UI shows both machine and build platform in the job detail panel and the job results are aggregated in the service based on a combination of machine platform and build option. We can very quickly change that to be the build platform if we need to, the choice there was pretty random I suppose.

From vidyo: since the values are identical, it doesn't matter we are aggregating on machine_platform for now (so this isn't a blocker), however we should switch over to using the job platform everywhere at some point.