From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <linux-kernel-owner@vger.kernel.org>
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
	id S1754048AbbBZSOn (ORCPT <rfc822;w@1wt.eu>);
	Thu, 26 Feb 2015 13:14:43 -0500
Received: from mail.skyhub.de ([78.46.96.112]:46290 "EHLO mail.skyhub.de"
	rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP
	id S1751472AbbBZSOm (ORCPT <rfc822;linux-kernel@vger.kernel.org>);
	Thu, 26 Feb 2015 13:14:42 -0500
Date: Thu, 26 Feb 2015 19:13:38 +0100
From: Borislav Petkov <bp@alien8.de>
To: X86 ML <x86@kernel.org>
Cc: Hitoshi Mitake <mitake@dcl.info.waseda.ac.jp>,
        Andy Lutomirski <luto@amacapital.net>,
        LKML <linux-kernel@vger.kernel.org>,
        Peter Zijlstra <a.p.zijlstra@chello.nl>,
        Paul Mackerras <paulus@samba.org>,
        Arnaldo Carvalho de Melo <acme@kernel.org>
Subject: Re: [PATCH v2 00/15] x86, alternatives: Instruction padding and more
 robust JMPs
Message-ID: <20150226181338.GF3314@pd.tnic>
References: <1424776497-3180-1-git-send-email-bp@alien8.de>
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Disposition: inline
In-Reply-To: <1424776497-3180-1-git-send-email-bp@alien8.de>
User-Agent: Mutt/1.5.23 (2014-03-12)
Sender: linux-kernel-owner@vger.kernel.org
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

Hi all,

So this alternatives patchset breaks perf bench mem, here are a couple
of patches ontop, you guys tell me whether it makes sense. I wanted to
make it run all memset/memcpy routines so here are a couple of patches
which do this:

./perf bench mem memset -l 20MB -r all
# Running 'mem/memset' benchmark:
Routine default (Default memset() provided by glibc)
# Copying 20MB Bytes ...

       1.136000 GB/Sec
       6.026304 GB/Sec (with prefault)
Routine x86-64-unrolled (unrolled memset() in arch/x86/lib/memset_64.S)
# Copying 20MB Bytes ...

       5.333493 GB/Sec
       5.633473 GB/Sec (with prefault)
Routine x86-64-stosq (movsq-based memset() in arch/x86/lib/memset_64.S)
# Copying 20MB Bytes ...

       5.828484 GB/Sec
       5.851183 GB/Sec (with prefault)
Routine x86-64-stosb (movsb-based memset() in arch/x86/lib/memset_64.S)
# Copying 20MB Bytes ...

       5.553384 GB/Sec
       5.956465 GB/Sec (with prefault)

This way you can see all results by executing one command only with "-r
all".

Patches coming as a reply to this message.

-- 
Regards/Gruss,
    Boris.

ECO tip #101: Trim your mails when you reply.
--