[LLVMdev] [llvm-testresults] bwilson__llvm-gcc_PROD__i386 nightly tester results

Bob Wilson bob.wilson at apple.com
Mon Jul 25 09:46:22 PDT 2011

On Jul 25, 2011, at 8:10 AM, Duncan Sands wrote:

> Hi Bob,
>>> A big compile time regression.  Any ideas?
>>> Ciao, Duncan.
>> False alarm.  For some reason that I have not yet been able to figure out, these tests run significantly more slowly when I run them during the daytime, which I did for that run.  I checked a few of the worst regressions reported here and they all recovered in subsequent runs.
> here is a crazy idea: during the day the room the computer is in is hotter,
> and to avoid overheating the CPU frequency is reduced, resulting in the machine
> running slower.

Yeah, I had actually considered that.  The air conditioning in my office is pretty good, though.  Until I find a solution, I'll try to remember to comment on the list about daytime runs that show regressions so that they won't raise any false alarms.

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