From owner-freebsd-current@FreeBSD.ORG Sat May 8 23:25:48 2010 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id EB1DF106566B for ; Sat, 8 May 2010 23:25:48 +0000 (UTC) (envelope-from kmatthew.macy@gmail.com) Received: from mail-qy0-f181.google.com (mail-qy0-f181.google.com [209.85.221.181]) by mx1.freebsd.org (Postfix) with ESMTP id A25C28FC0C for ; Sat, 8 May 2010 23:25:48 +0000 (UTC) Received: by qyk11 with SMTP id 11so3532015qyk.13 for ; Sat, 08 May 2010 16:25:41 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:sender:reply-to:received :in-reply-to:references:date:x-google-sender-auth:message-id:subject :from:to:cc:content-type:content-transfer-encoding; bh=fEhMrYD9fg34reg0ur9fU6gB8B7PsNWq/nZwPhx+lDs=; b=dXisW78ZAOod/fSoavUk/04BgDzconPyk+njpFKHzFG56qdnBoWAlBwgX2ClUNW12n /h2irjVEs4S0IylOoZV2dsigCCuJh30/4/tRC79bNhVx/3GdzPjndLuFDzCyXCokAfj7 cLFYfIvpYUnCDeYGrHA4glCND32oiYUHNet/o= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:sender:reply-to:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:cc:content-type :content-transfer-encoding; b=SNtVVpsuytzC+5WA0IOvZhwxEaLHy1+NIRao5Wge3DlZ84SmSdZWIIvUv5EcEq9RGX vRW2f81el1d372H5Zf8EijfnaRHBgoNh7zYs1JkZuRW3UIbLlBbyCN7TZKF9CIhMn4Qo FjQlmsfcd2Cqu+FAy0h0qLhloA2TbJWEGFIsU= MIME-Version: 1.0 Received: by 10.224.113.217 with SMTP id b25mr1219137qaq.345.1273359644623; Sat, 08 May 2010 16:00:44 -0700 (PDT) Sender: kmatthew.macy@gmail.com Received: by 10.229.224.71 with HTTP; Sat, 8 May 2010 16:00:44 -0700 (PDT) In-Reply-To: References: Date: Sat, 8 May 2010 16:00:44 -0700 X-Google-Sender-Auth: 72ecc711dab685a8 Message-ID: From: "K. Macy" To: bf1783@gmail.com Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Cc: alc@freebsd.org, freebsd-current@freebsd.org Subject: Re: Recent sys/vm/ changes and nvidia-driver X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: kmacy@freebsd.org List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 08 May 2010 23:25:49 -0000 On Sat, May 8, 2010 at 2:20 PM, b. f. wrote: > On 05/08/10 13:36, Alan Cox wrote: >> Doug Barton wrote: >>> On 05/05/10 11:56, Alan Cox wrote: >>> >>>> I'm afraid that I would advise waiting a few days. =A0This round of >>>> changes >>>> are not yet complete. > > What performance differences, if any, can we expect on uniprocessors > from the vm page lock-related changes? Kip's original post on -arch > mentioned some performance improvements and no significant > regressions, but on a dual 4-core machine. I wouldn't actually worry about UP since the overhead can largely be disabled by building without SMP. I think we need to be looking at how a dual-core system performs, trading off any regressions there against current processor trends of ever higher core and thread count. Cheers, Kip