[Webkit-unassigned] [Bug 77419] run-webkit-tests: This machine could support 16 child processes, but only has enough memory for 15

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=77419


Dirk Pranke <dpranke at chromium.org> changed:

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--- Comment #10 from Dirk Pranke <dpranke at chromium.org>  2012-01-31 13:28:09 PST ---
(In reply to comment #9)
> We should ensure that all the bots have enough memory to run as many DRT processes as cores, otherwise we are just wasting cpu capacity.  If this means upgrading the memory in the bots, that is what we should do.  Our EWS bots are a mix of 4, 8, and 16 core machines.  What is the memory requirement for DRT?  Obviously a 16 core machine will need more memory than a 4 core machine, but how much more I am unsure.

I agree with Lucas. Memory is (relatively) cheap, and this is the approach we've been using since time immemorial on the Chromium bots. I think roughly speaking we tend to have about 768MB of physical memory per DRT instance (i.e., per virtual core). Dunno if 512MB/DRT would be enough, but it sure seems like it should be.

I can pull the stats from all of the Chromium bots if need be.

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