Re: [tip:x86/urgent] x86/cpu: Use indirect call to measure performance in init_amd_k6()
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- Subject: Re: [tip:x86/urgent] x86/cpu: Use indirect call to measure performance in init_amd_k6()
- From: Borislav Petkov <bp@xxxxxxxxx>
- Date: Wed, 12 Jul 2017 15:48:44 +0200
- Cc: linux-tip-commits@xxxxxxxxxxxxxxx, brgerst@xxxxxxxxx, dvlasenk@xxxxxxxxxx, peterz@xxxxxxxxxxxxx, mpatocka@xxxxxxxxxx, hpa@xxxxxxxxx, tglx@xxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, luto@xxxxxxxxxx, jpoimboe@xxxxxxxxxx, torvalds@xxxxxxxxxxxxxxxxxxxx, mingo@xxxxxxxxxx
- In-reply-to: <tip-429ed86b5c99b388543f6f7f6983b1230326f2bb@git.kernel.org>
- References: <alpine.LRH.2.02.1707110737530.8746@file01.intranet.prod.int.rdu2.redhat.com> <tip-429ed86b5c99b388543f6f7f6983b1230326f2bb@git.kernel.org>
- User-agent: Mutt/1.6.0 (2016-04-01)
On Wed, Jul 12, 2017 at 06:09:57AM -0700, tip-bot for Mikulas Patocka wrote:
> Commit-ID: 429ed86b5c99b388543f6f7f6983b1230326f2bb
> Gitweb: http://git.kernel.org/tip/429ed86b5c99b388543f6f7f6983b1230326f2bb
> Author: Mikulas Patocka <mpatocka@xxxxxxxxxx>
> AuthorDate: Tue, 11 Jul 2017 07:44:05 -0400
> Committer: Ingo Molnar <mingo@xxxxxxxxxx>
> CommitDate: Wed, 12 Jul 2017 10:42:32 +0200
>
> x86/cpu: Use indirect call to measure performance in init_amd_k6()
>
> This old piece of code is supposed to measure the performance of indirect
> calls to determine if the processor is buggy or not, however the compiler
> optimizer turns it into a direct call.
Are you booting on a real K6 or qemu?
--
Regards/Gruss,
Boris.
ECO tip #101: Trim your mails when you reply.
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