Re: [lkp] [x86/platform/UV] 71854cb812: will-it-scale.per_thread_ops -2.3% regression

From	Thomas Gleixner <tglx@linutronix.de>
Newsgroups	linux.kernel
Subject	Re: [lkp] [x86/platform/UV] 71854cb812: will-it-scale.per_thread_ops -2.3% regression
Date	2016-10-25 13:00 +0200
Message-ID	<sw7Cx-4uH-9@gated-at.bofh.it> (permalink)
References	<sw3IB-1ZK-9@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On Tue, 25 Oct 2016, kernel test robot wrote:
> FYI, we noticed a -2.3% regression of will-it-scale.per_thread_ops due to commit:
> 
> commit 71854cb812ec23bfe5f63d52217e6b9e6cb901f5 ("x86/platform/UV: Fix support for EFI_OLD_MEMMAP after BIOS callback updates")
> https://github.com/0day-ci/linux Alex-Thorlton/x86-platform-UV-Fix-support-for-EFI_OLD_MEMMAP-after-BIOS-callback-updates/20161020-095215
> 
> in testcase: will-it-scale
> on test machine: 12 threads Intel(R) Core(TM) i7 CPU X 980 @ 3.33GHz with 6G memory

This is completely bogus. That patch does not even affect anything outside
of the SGI UV platform. And on your i7 system uv_bios_call() is definitely
not invoked.

I appreciate your effort, but posting such obviously bogus results does not
make people more confident in your testing efforts.

Thanks,

	tglx

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Re: [lkp] [x86/platform/UV] 71854cb812: will-it-scale.per_thread_ops  -2.3% regression Thomas Gleixner <tglx@linutronix.de> - 2016-10-25 13:00 +0200

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