From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pf0-f198.google.com (mail-pf0-f198.google.com [209.85.192.198]) by kanga.kvack.org (Postfix) with ESMTP id A73086B037C for ; Tue, 13 Jun 2017 06:20:09 -0400 (EDT) Received: by mail-pf0-f198.google.com with SMTP id b9so71301286pfl.0 for ; Tue, 13 Jun 2017 03:20:09 -0700 (PDT) Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com. [148.163.156.1]) by mx.google.com with ESMTPS id i7si2604519pfi.394.2017.06.13.03.20.07 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 13 Jun 2017 03:20:07 -0700 (PDT) Received: from pps.filterd (m0098396.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.20/8.16.0.20) with SMTP id v5DAJDtu071228 for ; Tue, 13 Jun 2017 06:20:07 -0400 Received: from e06smtp10.uk.ibm.com (e06smtp10.uk.ibm.com [195.75.94.106]) by mx0a-001b2d01.pphosted.com with ESMTP id 2b2a456cvx-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Tue, 13 Jun 2017 06:20:06 -0400 Received: from localhost by e06smtp10.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Tue, 13 Jun 2017 11:20:03 +0100 Subject: Re: [RFC v4 00/20] Speculative page faults References: <1497018069-17790-1-git-send-email-ldufour@linux.vnet.ibm.com> <20170609150126.GI21764@dhcp22.suse.cz> <83cf1566-3e76-d3fa-10a8-d83bbf9fd568@linux.vnet.ibm.com> <20170609163520.GB9332@dhcp22.suse.cz> <84e1698a-c85f-ee10-d367-2c203c6eea73@linux.intel.com> From: Laurent Dufour Date: Tue, 13 Jun 2017 12:19:57 +0200 MIME-Version: 1.0 In-Reply-To: <84e1698a-c85f-ee10-d367-2c203c6eea73@linux.intel.com> Content-Type: text/plain; charset=utf-8 Content-Language: fr Content-Transfer-Encoding: 7bit Message-Id: <98b890bc-10f7-d049-22a4-fe18c712af8d@linux.vnet.ibm.com> Sender: owner-linux-mm@kvack.org List-ID: To: Tim Chen , Michal Hocko Cc: paulmck@linux.vnet.ibm.com, peterz@infradead.org, akpm@linux-foundation.org, kirill@shutemov.name, ak@linux.intel.com, dave@stgolabs.net, jack@suse.cz, Matthew Wilcox , linux-kernel@vger.kernel.org, linux-mm@kvack.org, haren@linux.vnet.ibm.com, khandual@linux.vnet.ibm.com, npiggin@gmail.com, bsingharora@gmail.com On 09/06/2017 18:59, Tim Chen wrote: > On 06/09/2017 09:35 AM, Michal Hocko wrote: >> On Fri 09-06-17 17:25:51, Laurent Dufour wrote: >> [...] >>> Thanks Michal for your feedback. >>> >>> I mostly focused on this database workload since this is the one where >>> we hit the mmap_sem bottleneck when running on big node. On my usual >>> victim node, I checked for basic usage like kernel build time, but I >>> agree that's clearly not enough. >>> >>> I try to find details about the 'kbench' you mentioned, but I didn't get >>> any valid entry. >>> Would you please point me on this or any other bench tool you think will >>> be useful here ? >> >> Sorry I meant kernbech (aka parallel kernel build). Other highly threaded >> workloads doing a lot of page faults and address space modification >> would be good to see as well. I wish I could give you much more >> comprehensive list but I am not very good at benchmarks. >> > > Laurent, > > Have you tried running the multi-fault microbenchmark by Kamezawa? > It does threaded page faults in parallel. > Peter ran that when he posted his specualtive page faults patches. > https://lkml.org/lkml/2010/1/6/28 Thanks Tim to remind me about this, I downloaded and built it a time ago and forget about it. I'll give it another try ! -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org