From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-3.9 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 88856C433E1 for ; Tue, 18 Aug 2020 17:36:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5C32A20674 for ; Tue, 18 Aug 2020 17:36:54 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=kroah.com header.i=@kroah.com header.b="n/I/jA2s"; dkim=pass (2048-bit key) header.d=messagingengine.com header.i=@messagingengine.com header.b="Gg4TdrQe" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728880AbgHRRgu (ORCPT ); Tue, 18 Aug 2020 13:36:50 -0400 Received: from wout4-smtp.messagingengine.com ([64.147.123.20]:39323 "EHLO wout4-smtp.messagingengine.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728889AbgHRRgf (ORCPT ); Tue, 18 Aug 2020 13:36:35 -0400 Received: from compute1.internal (compute1.nyi.internal [10.202.2.41]) by mailout.west.internal (Postfix) with ESMTP id 3494A10A8; Tue, 18 Aug 2020 13:36:34 -0400 (EDT) Received: from mailfrontend2 ([10.202.2.163]) by compute1.internal (MEProxy); Tue, 18 Aug 2020 13:36:34 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kroah.com; h= date:from:to:cc:subject:message-id:references:mime-version :content-type:content-transfer-encoding:in-reply-to; s=fm1; bh=9 TlfznyxsMv5GMFDcfPOM5mcVt7VYPmD7P4p5Aa1ggA=; b=n/I/jA2sR7EdLT4fM sdG8+/6f5iDm80zA9fnUvSoAe+dUsK94q3XUGCycovf4oIeDyYVAyHVh/JXLGfJC yahhcQ2zWxL3srqei7NxqOZK0lz+2mmLS+QZKvsRtv9PfnqhTt6wPdagpV80d4e+ iLPzzTDlone/3uKJcSNXU3Ktth+Ua/Fm+JI7PY6vMX7x1jFuOvIWn3VTVLf+wwzS H5N4/AiQxVRXvtfEFjJdsdWW2V5t+jrT3k89QZooxNrLvUYVbLcigf5u/zApyJKs rk8p7cSnsZvwJnC1tFxoe2IaBFA07qFanpUrpjzkBEyMhPYXu39Z4+0DRARujkG3 ryyEw== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=cc:content-transfer-encoding:content-type :date:from:in-reply-to:message-id:mime-version:references :subject:to:x-me-proxy:x-me-proxy:x-me-sender:x-me-sender :x-sasl-enc; s=fm3; bh=9TlfznyxsMv5GMFDcfPOM5mcVt7VYPmD7P4p5Aa1g gA=; b=Gg4TdrQeB2iojmFKU7oK1ICjlmbsrX1Ru1wI0Uc2mGdq9OarkJHAUOMhD z+siCAVbI1uSReLu4adjAcDNx46kCuADYZ/nlXxWlHFKtz2amNNX0CERhef/1w/h d5V1uNeiEd7aQixuDKmYy/IRolckpqT0JExmCVf/6XUizADVEVchml3AG4IYI5Gw dlxEpMYdo3swERA4HE8pDD6LfAlnH41s8AmmAfv4K09ebngM/WmIYGxPCld663Ym RihXPTkqblSCclFI+U4uMpoDJ+Z5w83pma18GsTbjIKjjnzA1SrtLqU2f2YsGoTI 7voPF5A7qLNEc30xedntAKCqmrawg== X-ME-Sender: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgeduiedruddtiedgleefucetufdoteggodetrfdotf fvucfrrhhofhhilhgvmecuhfgrshhtofgrihhlpdfqfgfvpdfurfetoffkrfgpnffqhgen uceurghilhhouhhtmecufedttdenucenucfjughrpeffhffvuffkfhggtggugfgjsehtke ertddttdejnecuhfhrohhmpefirhgvghcumffjuceoghhrvghgsehkrhhorghhrdgtohhm qeenucggtffrrghtthgvrhhnpeeuheekheelffefieduteefkeejffdvueehjeejffehle dugfetkedvleekudduvdenucfkphepkeefrdekiedrkeelrddutdejnecuvehluhhsthgv rhfuihiivgeptdenucfrrghrrghmpehmrghilhhfrhhomhepghhrvghgsehkrhhorghhrd gtohhm X-ME-Proxy: Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) by mail.messagingengine.com (Postfix) with ESMTPA id 2E2693060272; Tue, 18 Aug 2020 13:36:33 -0400 (EDT) Date: Tue, 18 Aug 2020 19:36:56 +0200 From: Greg KH To: Muni Sekhar Cc: kernelnewbies , linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org Subject: Re: Scheduler benchmarks Message-ID: <20200818173656.GA748290@kroah.com> References: <20200818143633.GA628293@kroah.com> <20200818171457.GA736234@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Aug 18, 2020 at 11:01:35PM +0530, Muni Sekhar wrote: > On Tue, Aug 18, 2020 at 10:44 PM Greg KH wrote: > > > > On Tue, Aug 18, 2020 at 10:24:13PM +0530, Muni Sekhar wrote: > > > On Tue, Aug 18, 2020 at 8:06 PM Greg KH wrote: > > > > > > > > On Tue, Aug 18, 2020 at 08:00:11PM +0530, Muni Sekhar wrote: > > > > > Hi all, > > > > > > > > > > I’ve two identical Linux systems with only kernel differences. > > > > > > > > What are the differences in the kernels? > > > > You didn't answer this question, is this the same kernel source being > > compared here? Same version? Same compiler? Everything identical? > Both systems are having exactly the same hardware configuration. > Compiler and kernel versions are different. One system has Ubuntu > 16.04.4 LTS(4.4.0-66-generic kernel with gcc version 5.4.0) kernel and > the other one has Ubuntu 18.04.4 LTS(4.15.0-91-generic kernel with gcc > version 7.5.0). Those are _very_ different kernel versions, with many years and tens of thousands of different changes between them. Hopefully the newer kernel is faster, so just stick with that :) greg k-h