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Re: [perl.git] branch blead, updated. v5.19.0-497-g1ebabb4

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From:
Dave Mitchell
Date:
June 10, 2013 17:23
Subject:
Re: [perl.git] branch blead, updated. v5.19.0-497-g1ebabb4
Message ID:
20130610172327.GL30132@iabyn.com
On Mon, Jun 10, 2013 at 12:33:30PM -0400, George Greer wrote:
> At least for my Linux smokers, Benchmark.t test 15 fails not because
> the clocks are inconsistent but because the load average can reach
> over 100 at times depending on how many different smokes are
> running, especially since they almost all do "make -j" and
> TEST_JOBS=8. (The AddressSanitizer smokers don't use "make -j"
> because I kernel panic'd my machine once doing that.)  My machine
> has 4 physical, 8 virtual cores so it doesn't blow the timings too
> frequently but it does happen.
> 
> A check for load average being "too high" after a failure to silence
> it might help at least in my cases.

Well, the test is failing fundamentally for one of two reasons: either
the amount of CPU burned (as reported by the OS as (times)[0]) for a given
amount of work is not constant, or there's a bug in Benchmark somewhere.

If the former, whether its caused by high load or some other reason, I'm
hoping my new change will detect this.

-- 
That he said that that that that is is is debatable, is debatable.

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