| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <20131215132329.GC4361@pd.tnic>
Date: Sun, 15 Dec 2013 14:23:29 +0100
From: Borislav Petkov <bp@...en8.de>
To: John <da_audiophile@...oo.com>
Cc: Richard Weinberger <richard.weinberger@...il.com>,
"H. Peter Anvin" <hpa@...or.com>,
"akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
"david.heidelberger@...t.cz" <david.heidelberger@...t.cz>,
"tglx@...utronix.de" <tglx@...utronix.de>,
"mingo@...hat.com" <mingo@...hat.com>,
"x86@...nel.org" <x86@...nel.org>,
lkml <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] expand micro-optimizations in kernel to newer model CPUs
On Sun, Dec 15, 2013 at 04:42:50AM -0800, John wrote:
> I am using ANOVA to establish that the generic group differs from the
> optimized group.
You probably should run a couple other benchmarks, in addition, for
greater confidence that this optimization actually brings any palpable
improvement and is not just causing code bloat.
For example, last time I did a perf profile of a kernel build on AMD
F15h, the PILERDRIVER "optimization" was actually even a bit worse than
the standard MK8 one.
http://marc.info/?l=linux-kernel&m=138081947417204
--
Regards/Gruss,
Boris.
Sent from a fat crate under my desk. Formatting is fine.
--
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists