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=-2.4 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY,USER_AGENT_SANE_1 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 BE96EC47257 for ; Wed, 6 May 2020 22:22:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9D30A20753 for ; Wed, 6 May 2020 22:22:11 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=oracle.com header.i=@oracle.com header.b="oTF5oYGz" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730110AbgEFWWL (ORCPT ); Wed, 6 May 2020 18:22:11 -0400 Received: from userp2120.oracle.com ([156.151.31.85]:54572 "EHLO userp2120.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729985AbgEFWWK (ORCPT ); Wed, 6 May 2020 18:22:10 -0400 Received: from pps.filterd (userp2120.oracle.com [127.0.0.1]) by userp2120.oracle.com (8.16.0.42/8.16.0.42) with SMTP id 046MHrU3036994; Wed, 6 May 2020 22:21:15 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=date : from : to : cc : subject : message-id : references : mime-version : content-type : in-reply-to; s=corp-2020-01-29; bh=z+LlBKYna795Gom/3fJzeJIvqJa67ZsX6LqoW2jCPmw=; b=oTF5oYGzvMAaLEqGhwJwqGVZSNd0qmF+hqs17v/mtJznVezka3nNb4zCuJI6pK+vr1K0 oD/X4v62FjJC2F2GpaDlwS0jESSFZNlqj1GIGrDYMq6e06juxUrJJlguLlQLH6sM/GJT hAucB9ZAFXNV3Q//UujMxQq29RKurkzwCPIJaVtdiIspWUik0oNEIdijsJEkZIZ0Lb4U NHCSP/ZWi3vUl6hPMtX/kwez3cxr76QpetK36yIXwXzMCL1/uzS2tkB5lC+w0cOtvzCH h1TDllx9dJyNQFIKiY9ijR/Ez9xB5JLyXRzNxqZ9i0mpOcbGbIJBeLAO4YReqhw2FNrQ Sw== Received: from userp3030.oracle.com (userp3030.oracle.com [156.151.31.80]) by userp2120.oracle.com with ESMTP id 30s1gncv3k-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 06 May 2020 22:21:15 +0000 Received: from pps.filterd (userp3030.oracle.com [127.0.0.1]) by userp3030.oracle.com (8.16.0.42/8.16.0.42) with SMTP id 046MHmhR062218; Wed, 6 May 2020 22:21:14 GMT Received: from userv0121.oracle.com (userv0121.oracle.com [156.151.31.72]) by userp3030.oracle.com with ESMTP id 30t1r8vcdm-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 06 May 2020 22:21:14 +0000 Received: from abhmp0015.oracle.com (abhmp0015.oracle.com [141.146.116.21]) by userv0121.oracle.com (8.14.4/8.13.8) with ESMTP id 046ML6cm029131; Wed, 6 May 2020 22:21:06 GMT Received: from ca-dmjordan1.us.oracle.com (/10.211.9.48) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Wed, 06 May 2020 15:21:05 -0700 Date: Wed, 6 May 2020 18:21:27 -0400 From: Daniel Jordan To: Alexander Duyck Cc: Daniel Jordan , Josh Triplett , Andrew Morton , Herbert Xu , Steffen Klassert , Alex Williamson , Alexander Duyck , Dan Williams , Dave Hansen , David Hildenbrand , Jason Gunthorpe , Jonathan Corbet , Kirill Tkhai , Michal Hocko , Pavel Machek , Pavel Tatashin , Peter Zijlstra , Randy Dunlap , Shile Zhang , Tejun Heo , Zi Yan , linux-crypto@vger.kernel.org, linux-mm , LKML Subject: Re: [PATCH 6/7] mm: parallelize deferred_init_memmap() Message-ID: <20200506222127.l3p2a2vjavwz2bdl@ca-dmjordan1.us.oracle.com> References: <20200430201125.532129-1-daniel.m.jordan@oracle.com> <20200430201125.532129-7-daniel.m.jordan@oracle.com> <3C3C62BE-6363-41C3-834C-C3124EB3FFAB@joshtriplett.org> <20200505014844.ulp4rtih7adtcicm@ca-dmjordan1.us.oracle.com> <20200505020916.mve4ijrg4z5h7eh5@ca-dmjordan1.us.oracle.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: NeoMutt/20180716 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9613 signatures=668687 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 bulkscore=0 adultscore=0 suspectscore=0 spamscore=0 mlxlogscore=999 malwarescore=0 phishscore=0 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2003020000 definitions=main-2005060177 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9613 signatures=668687 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 adultscore=0 suspectscore=0 mlxscore=0 spamscore=0 clxscore=1015 priorityscore=1501 bulkscore=0 phishscore=0 impostorscore=0 malwarescore=0 lowpriorityscore=0 mlxlogscore=999 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2003020000 definitions=main-2005060177 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, May 05, 2020 at 07:55:43AM -0700, Alexander Duyck wrote: > One question about this data. What is the power management > configuration on the systems when you are running these tests? I'm > just curious if CPU frequency scaling, C states, and turbo are > enabled? Yes, intel_pstate is loaded in active mode without hwp and with turbo enabled (those power management docs are great by the way!) and intel_idle is in use too. > I ask because that is what I have seen usually make the > difference in these kind of workloads as the throughput starts > dropping off as you start seeing the core frequency lower and more > cores become active. If I follow, you're saying there's a chance performance would improve with the above disabled, but how often would a system be configured that way? Even if it were faster, the machine is configured how it's configured, or am I missing your point?