From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: tuhs-bounces@minnie.tuhs.org X-Spam-Checker-Version: SpamAssassin 3.4.1 (2015-04-28) on inbox.vuxu.org X-Spam-Level: X-Spam-Status: No, score=-1.0 required=5.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, HTML_MESSAGE,MAILING_LIST_MULTI,RCVD_IN_DNSWL_NONE autolearn=ham autolearn_force=no version=3.4.1 Received: from minnie.tuhs.org (minnie.tuhs.org [45.79.103.53]) by inbox.vuxu.org (OpenSMTPD) with ESMTP id 4803a7fb for ; Sat, 1 Sep 2018 17:18:39 +0000 (UTC) Received: by minnie.tuhs.org (Postfix, from userid 112) id 58B22A2052; Sun, 2 Sep 2018 03:18:38 +1000 (AEST) Received: from minnie.tuhs.org (localhost [127.0.0.1]) by minnie.tuhs.org (Postfix) with ESMTP id 321C8A1A20; Sun, 2 Sep 2018 03:18:18 +1000 (AEST) Received: by minnie.tuhs.org (Postfix, from userid 112) id EDCFFA1A20; Sun, 2 Sep 2018 03:18:16 +1000 (AEST) Received: from p3plsmtpa09-04.prod.phx3.secureserver.net (p3plsmtpa09-04.prod.phx3.secureserver.net [173.201.193.233]) by minnie.tuhs.org (Postfix) with ESMTPS id 5AC54A1A1A for ; Sun, 2 Sep 2018 03:18:14 +1000 (AEST) Received: from medusa.kilonet.net ([72.69.214.193]) by :SMTPAUTH: with ESMTPA id w9XJfmnHr5uAGw9XJfCgul; Sat, 01 Sep 2018 10:18:13 -0700 Received: from [199.89.231.101] (ender.kilonet.net [199.89.231.101]) by medusa.kilonet.net (8.14.8/8.15.1) with ESMTP id w81HIDag011502; Sat, 1 Sep 2018 13:18:13 -0400 (EDT) To: Kevin Bowling References: <20180830213407.6DC4718C0A6@mercury.lcs.mit.edu> <20180831213451.r7LAj%ca6c@bitmessage.ch> <20180831215854.GB28971@mcvoy.com> <7ed51612-82d7-90ca-ceaf-37b0c869ff93@kilonet.net> From: Arthur Krewat Message-ID: Date: Sat, 1 Sep 2018 13:17:59 -0400 User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.9.1 MIME-Version: 1.0 In-Reply-To: Content-Type: multipart/alternative; boundary="------------4EA3DBFA5DECB0BA7DC09D44" Content-Language: en-US X-CMAE-Envelope: MS4wfIyD45Xb2h/clwDtv9T4vtrCQyitVTf/HLY2l5LQleVFLSgHYFuUK1XErglMusB/sBu5owM0sSh5KALs55eO1KpiCuBwcW1X8zNebucSvCl3qv65lt1C V2CxtYCy3UdVQCxA58cjpI1P5ZAF7H8RfpobtVB71oOaF64zkVtafdgrvFH4jbe+OeSGVHZrQOAcNbWgHbP8KRgd5tB9H01yqLg= Subject: Re: [TUHS] SunOS code? X-BeenThere: tuhs@minnie.tuhs.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: The Unix Heritage Society mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: TUHS main list Errors-To: tuhs-bounces@minnie.tuhs.org Sender: "TUHS" This is a multi-part message in MIME format. --------------4EA3DBFA5DECB0BA7DC09D44 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit On 9/1/2018 12:27 PM, Kevin Bowling wrote: >> I find it's about equal, and even exceeds Linux in terms of it's NUMA >> support and multi-processor support. I need to move some systems away from >> Solaris and off to Linux, and I find it's NUMA support lacking in certain >> ways. > This is pure fantasy. To understand Linux performance on high core > count and multi-socket machines is to have at least passing knowledge > of Paul McKenney's genius work on RCU [1] and NUMA [2] at Sequent [3] > and on Linux. IBM bought Sequent, made a favorable patent grant of > RCU for Linux, and the rest history. Thanks :) - I'm basing this on Oracle database performance, for the most part, and it's weird way of supporting NUMA on Linux in a bass-ackwards sort of way. Nothing I see in the latest RedHat/CentOS tells me it even cares about NUMA, but maybe that's more of their "we know better than you" mentality and it's all hidden under the covers somewhere. ak --------------4EA3DBFA5DECB0BA7DC09D44 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: 7bit On 9/1/2018 12:27 PM, Kevin Bowling wrote:
I find it's about equal, and even exceeds Linux in terms of it's NUMA
support and multi-processor support. I need to move some systems away from
Solaris and off to Linux, and I find it's NUMA support lacking in certain
ways.

This is pure fantasy.  To understand Linux performance on high core
count and multi-socket machines is to have at least passing knowledge
of Paul McKenney's genius work on RCU [1] and NUMA [2] at Sequent [3]
and on Linux.  IBM bought Sequent, made a favorable patent grant of
RCU for Linux, and the rest history.

Thanks :) - I'm basing this on Oracle database performance, for the most part, and it's weird way of supporting NUMA on Linux in a bass-ackwards sort of way. Nothing I see in the latest RedHat/CentOS tells me it even cares about NUMA, but maybe that's more of their "we know better than you" mentality and it's all hidden under the covers somewhere.

ak
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