From owner-svn-src-head@freebsd.org Sat Sep 9 05:08:24 2017 Return-Path: Delivered-To: svn-src-head@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id DB683E0300B; Sat, 9 Sep 2017 05:08:24 +0000 (UTC) (envelope-from yaneurabeya@gmail.com) Received: from mail-pg0-x22e.google.com (mail-pg0-x22e.google.com [IPv6:2607:f8b0:400e:c05::22e]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id A5E237F729; Sat, 9 Sep 2017 05:08:24 +0000 (UTC) (envelope-from yaneurabeya@gmail.com) Received: by mail-pg0-x22e.google.com with SMTP id t3so7863863pgt.0; Fri, 08 Sep 2017 22:08:24 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=subject:mime-version:from:in-reply-to:date:cc:message-id:references :to; bh=O8duBlX8HlFbDhgw4+VckevJyBhHwbc11LgNyHX0v7E=; b=JkYkqKDKIv1fZVarHKbiq6/SAyUeEYlQ0Y2ktnpL6NA6cQhiK/SCXQmIiCrlTeOO8X fVjw5fYPUVbjpNcMdRjqM9LFA0fBa4MKlmD5uD+K7y0tn+xM0cB8LkJDFczkYNswNog4 AxsN4km+Vnh/Mnb2nei4E+pmaWPUueIvTbxHcURaR66CUz5RtX6oQV0fWtv7X8xKh0lh W2lBOlhnk/HqAxrC7xopYutfvjTKjMRk49qabLUgG+EndAWblgjLYvhyXEaA/ofI2Bu7 C4G0QUr38TTqAMtZpkI8wfV3XIC/7iRt4MeXZ7toeW8ul7kRwMvzJ+Ch3/4cKjtcchRp t9Uw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:mime-version:from:in-reply-to:date:cc :message-id:references:to; bh=O8duBlX8HlFbDhgw4+VckevJyBhHwbc11LgNyHX0v7E=; b=NlwOO3iERVWXqKHXl85Wt2kffdmoZ0Vxgn4O/k5d3t8LxXV3jQ3T3U+OHtfFTdKrEi XFwa3Vaccd2zEcP1es346qAiE9tA7eL7hvGcXuJRwheMuLsAunf4ZaMDOfbjctU7C+Dx 98T2htWUNvY95GTr9FpsCuQP82NeFP6ahbQi8MOBt+TDtCKDmSWQF5bY6dbng9SYNVIz U0OGfxr2YJkzixu+TYDYQ8By2XnyBp0mBfqO1C3sWyu+2VyYFiQGt3Ie1X4DHhQpI0/H 8pi0RL0RnSioQK3mduijYizwSFieiMniX4Y4UZsFP4hLnveBv3yU4hzQMg5EWWehMdZ0 VbLw== X-Gm-Message-State: AHPjjUiQxY1Bc3mRn3PkwyWC/suRTeYmtleq14Ob3RaK8w6f+OqPNpwz LXkyOL/xNOebLX4UVHE= X-Google-Smtp-Source: ADKCNb5YWm+iFC2T6Qa10NBPeLwvj6Lc70TOK/n1rdkIZrznJim5221tT6WEtWOHMT1ADGyz2mFYuA== X-Received: by 10.84.141.1 with SMTP id 1mr6008956plu.234.1504933703910; Fri, 08 Sep 2017 22:08:23 -0700 (PDT) Received: from pinklady.local (c-73-19-52-228.hsd1.wa.comcast.net. [73.19.52.228]) by smtp.gmail.com with ESMTPSA id 133sm6710562pfy.2.2017.09.08.22.08.22 (version=TLS1 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Fri, 08 Sep 2017 22:08:22 -0700 (PDT) Subject: Re: svn commit: r323329 - head/sys/sys Mime-Version: 1.0 (Mac OS X Mail 9.3 \(3124\)) Content-Type: multipart/signed; boundary="Apple-Mail=_D4977873-6CC0-4F5C-8FCA-F3CFE1247636"; protocol="application/pgp-signature"; micalg=pgp-sha512 X-Pgp-Agent: GPGMail From: "Ngie Cooper (yaneurabeya)" In-Reply-To: <201709082009.v88K9EGW006964@repo.freebsd.org> Date: Fri, 8 Sep 2017 22:08:21 -0700 Cc: src-committers , svn-src-all@freebsd.org, svn-src-head@freebsd.org Message-Id: <75479AB5-BB64-4D5B-8FA0-474532E7B103@gmail.com> References: <201709082009.v88K9EGW006964@repo.freebsd.org> To: Mateusz Guzik X-Mailer: Apple Mail (2.3124) X-BeenThere: svn-src-head@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: SVN commit messages for the src tree for head/-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 09 Sep 2017 05:08:25 -0000 --Apple-Mail=_D4977873-6CC0-4F5C-8FCA-F3CFE1247636 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=utf-8 > On Sep 8, 2017, at 13:09, Mateusz Guzik wrote: >=20 > Author: mjg > Date: Fri Sep 8 20:09:14 2017 > New Revision: 323329 > URL: https://svnweb.freebsd.org/changeset/base/323329 >=20 > Log: > Allow __builtin_memset instead of bzero for small buffers of known = size >=20 > In particular this eliminates function calls and related register = save/restore > when only few writes would suffice. >=20 > Example speed up can be seen in a fstat microbenchmark on AMD Ryzen = cpus, where > the throughput went up by ~4.5%. >=20 > Thanks to cem@ for benchmarking and reviewing the patch. This change breaks all platforms that use gcc. If it=E2=80=99s not = reverted in the next 3 hours, I=E2=80=99ll revert it. Please fix ASAP if possible: = https://ci.freebsd.org/job/FreeBSD-head-riscv64-build/3668/console . Thanks, -Ngie --Apple-Mail=_D4977873-6CC0-4F5C-8FCA-F3CFE1247636 Content-Transfer-Encoding: 7bit Content-Disposition: attachment; filename=signature.asc Content-Type: application/pgp-signature; name=signature.asc Content-Description: Message signed with OpenPGP using GPGMail -----BEGIN PGP SIGNATURE----- Comment: GPGTools - https://gpgtools.org iQIcBAEBCgAGBQJZs3dFAAoJEPWDqSZpMIYV+XMP/0cxFRiEOueHlk5RL4u/ztrA wZo7RJfovmAg8a1AkgIP0FuiyLVR9GDX1A1ZkMVTXrTOFUZapef90WFy/uf07bCS DnJQ5/5HZTJbsOBpNLS8CSBY1DYLgMb7Q/HitwXvUWx687trnq7CaB6UyCLJPFyt NfOw4Uxgq1mOVh7usFkSXxfFRemcOmyfe+tPC4c44/J2sSSz2j0W529Yzdlp90W4 55iTCotkiMdzSQqs3R4nb0NmdHGwRX1N39YV0aVfvasiHWm71rvi69oQicxZm5wj jjQDmyVf+cJPX0HoOVe0TtO+jn/cCXAGtoQPfu4fVzC3ZWAPggy2SQRYb/oENQnt sBMDz00wWj3rExmEo8ZhDmXDdnFr1yADblvv83N2G5OwNECcEZXCvV+AHDaoa7zA 48g04T/MWnKyetlmragsLqHnqDTt43EVjSllIk65Ran1xOquxzCvExvAKI5RYv/N mAAmQmBlXDmx/Y8RiM3dl6Ko4NCCOLhBEmFS3C3oStAlxPxu55ngUD236wuv+kU/ BeJGTmtvICWVvt2TgWy6w07Lu50RJkIfTFcy9DFW+a2yOG6/zBIjjBtv8HeXHG56 L45eMrELiCXb3vB8IxqO/J/BtgQvo+To6V2tDEt8LXTcf2jb+bG+Epej3u1nH6yQ xxhF/argE9/b9fIz03l5 =U930 -----END PGP SIGNATURE----- --Apple-Mail=_D4977873-6CC0-4F5C-8FCA-F3CFE1247636--