From owner-svn-src-head@freebsd.org Thu Jun 14 05:59:49 2018 Return-Path: Delivered-To: svn-src-head@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 106D81002FFC for ; Thu, 14 Jun 2018 05:59:49 +0000 (UTC) (envelope-from oliver.pinter@hardenedbsd.org) Received: from mail-yb0-x230.google.com (mail-yb0-x230.google.com [IPv6:2607:f8b0:4002:c09::230]) (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 9CA2C754A8 for ; Thu, 14 Jun 2018 05:59:48 +0000 (UTC) (envelope-from oliver.pinter@hardenedbsd.org) Received: by mail-yb0-x230.google.com with SMTP id w74-v6so1807992ybe.11 for ; Wed, 13 Jun 2018 22:59:48 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=hardenedbsd-org.20150623.gappssmtp.com; s=20150623; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc; bh=f7ocAOw+SgkmpJUFBEj+IGpdIxqCSRUqP2xlJYIEo8Y=; b=DEvQEf8/suKWic0jp//r+fv6VZnSbledBSszxSxzzwDlXdG+JGb3paRWWrhzaZbbL6 +FQcYbARXAy3g+JfJuypGQ+HWclqUMl7rcEAyyP4c1zVQ6UuXIXE2S5wwW7hjrV3Ni9M 3RVX5iWgCdYHPE8Kn+6pN/j68DsS7KB+tpv07XgivTXPyFmTOccmKQEFlM0uAssizmOA 8rKu3F4gcB1XuAsAWcRpwCyahgEFD66rwfVr6OVs38ld7gsejh97ESLXDTTL5WW6S2Tc 0Oyl4kttm7WnP/UEUUvL7+X3TEWfAiLY8JQIrI9qKecpNxBUgPy3a1obw9MB3bnDmBfE fG6g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:cc; bh=f7ocAOw+SgkmpJUFBEj+IGpdIxqCSRUqP2xlJYIEo8Y=; b=iquzufpmZmqh7sRxJi1tasWxgS/wDizBln+JYgGmPR+BUbk1So/WCUVmP4tl3b5vqS w7b8Ijb+CAqSVEa/QgBT/36FPesJl9i0LHEue9SeqmovpTGVkBROhUqqbszv/kcb5WyY KywezO13We57/UaCyivdqHoPKEavojDlRRKKHYvT0TWEwfwwSgDB987QsSVKddZ/p5ax geaREP4zXb34nEVfQum7F5DwcYNjE3Jh4RdiGhN/PgHJzzKKm9+fr96BYbARHE12nWCm sAOr5t0+mjme1pgFusruBMCx2uMVzYP9wgtkvhDQ06A6e+iJ649x9a1UcKg+QZTpZUt3 Gr+g== X-Gm-Message-State: APt69E22Mz2n8exaXm0dirc0NesJxRQuNaXQT7yVDxdGRZxA0nbfNAFd +aTYirTma9oy8Z2Xsa0jx9fXgOhCN4ZC+wO4kDp3/w== X-Google-Smtp-Source: ADUXVKJEynR1QJGkxBEph/0V7VMEXtS8IO45TrT/Zdfxfcdp3zrT/T+2Cmh/8FwyW+UiCzydSMnetVY4rRrRsP0wn/M= X-Received: by 2002:a25:bc06:: with SMTP id i6-v6mr603798ybh.348.1528955987926; Wed, 13 Jun 2018 22:59:47 -0700 (PDT) MIME-Version: 1.0 Received: by 2002:a25:db86:0:0:0:0:0 with HTTP; Wed, 13 Jun 2018 22:59:47 -0700 (PDT) In-Reply-To: <201806140030.w5E0UTIi042096@pdx.rh.CN85.dnsmgr.net> References: <201806131755.w5DHtAwo073314@repo.freebsd.org> <201806140030.w5E0UTIi042096@pdx.rh.CN85.dnsmgr.net> From: Oliver Pinter Date: Thu, 14 Jun 2018 07:59:47 +0200 Message-ID: Subject: Re: svn commit: r335072 - head/sys/amd64/amd64 To: "rgrimes@freebsd.org" Cc: Konstantin Belousov , "svn-src-head@freebsd.org" , "svn-src-all@freebsd.org" , "src-committers@freebsd.org" Content-Type: text/plain; charset="UTF-8" X-Content-Filtered-By: Mailman/MimeDel 2.1.26 X-BeenThere: svn-src-head@freebsd.org X-Mailman-Version: 2.1.26 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: Thu, 14 Jun 2018 05:59:49 -0000 On Thursday, June 14, 2018, Rodney W. Grimes wrote: > > Author: kib > > Date: Wed Jun 13 17:55:09 2018 > > New Revision: 335072 > > URL: https://svnweb.freebsd.org/changeset/base/335072 > > > > Log: > > Enable eager FPU context switch by default on amd64. > > > > With compilers making increasing use of vector instructions the > > performance benefit of lazily switching FPU state is no longer a > > desirable tradeoff. Linux switched to eager FPU context switch some > > time ago, and the idea was floated on the FreeBSD-current mailing list > > some years ago[1]. > > > > Enable eager FPU context switch by default on amd64, with a > tunable/sysctl > > available to turn it back off. > > > > [1] https://lists.freebsd.org/pipermail/freebsd-current/ > 2015-March/055198.html > > > > Reviewed by: jhb > > Tested by: pho > > Sponsored by: The FreeBSD Foundation > > MFC: ? Already done. > > ... > > -- > Rod Grimes > rgrimes@freebsd.org > _______________________________________________ > svn-src-head@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/svn-src-head > To unsubscribe, send any mail to "svn-src-head-unsubscribe@freebsd.org" >