From mapreduce-issues-return-28932-apmail-hadoop-mapreduce-issues-archive=hadoop.apache.org@hadoop.apache.org Fri Oct 7 05:02:54 2011 Return-Path: X-Original-To: apmail-hadoop-mapreduce-issues-archive@minotaur.apache.org Delivered-To: apmail-hadoop-mapreduce-issues-archive@minotaur.apache.org Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by minotaur.apache.org (Postfix) with SMTP id B25B398C1 for ; Fri, 7 Oct 2011 05:02:54 +0000 (UTC) Received: (qmail 59709 invoked by uid 500); 7 Oct 2011 05:02:54 -0000 Delivered-To: apmail-hadoop-mapreduce-issues-archive@hadoop.apache.org Received: (qmail 59680 invoked by uid 500); 7 Oct 2011 05:02:53 -0000 Mailing-List: contact mapreduce-issues-help@hadoop.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: mapreduce-issues@hadoop.apache.org Delivered-To: mailing list mapreduce-issues@hadoop.apache.org Received: (qmail 59672 invoked by uid 99); 7 Oct 2011 05:02:53 -0000 Received: from nike.apache.org (HELO nike.apache.org) (192.87.106.230) by apache.org (qpsmtpd/0.29) with ESMTP; Fri, 07 Oct 2011 05:02:53 +0000 X-ASF-Spam-Status: No, hits=-2000.5 required=5.0 tests=ALL_TRUSTED,RP_MATCHES_RCVD X-Spam-Check-By: apache.org Received: from [140.211.11.116] (HELO hel.zones.apache.org) (140.211.11.116) by apache.org (qpsmtpd/0.29) with ESMTP; Fri, 07 Oct 2011 05:02:51 +0000 Received: from hel.zones.apache.org (hel.zones.apache.org [140.211.11.116]) by hel.zones.apache.org (Postfix) with ESMTP id C14602AD43A for ; Fri, 7 Oct 2011 05:02:29 +0000 (UTC) Date: Fri, 7 Oct 2011 05:02:29 +0000 (UTC) From: "Amar Kamat (Resolved) (JIRA)" To: mapreduce-issues@hadoop.apache.org Message-ID: <882742300.6644.1317963749793.JavaMail.tomcat@hel.zones.apache.org> In-Reply-To: <1597268113.26544.1316005755050.JavaMail.tomcat@hel.zones.apache.org> Subject: [jira] [Resolved] (MAPREDUCE-3008) [Gridmix] Improve cumulative CPU usage emulation for short running tasks MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-JIRA-FingerPrint: 30527f35849b9dde25b450d4833f0394 X-Virus-Checked: Checked by ClamAV on apache.org [ https://issues.apache.org/jira/browse/MAPREDUCE-3008?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Amar Kamat resolved MAPREDUCE-3008. ----------------------------------- Resolution: Fixed Assignee: Amar Kamat Release Note: Improves cumulative CPU emulation for short running tasks. Hadoop Flags: Reviewed I just committed this to trunk! Thanks Ravi for helping with the reviews. > [Gridmix] Improve cumulative CPU usage emulation for short running tasks > ------------------------------------------------------------------------ > > Key: MAPREDUCE-3008 > URL: https://issues.apache.org/jira/browse/MAPREDUCE-3008 > Project: Hadoop Map/Reduce > Issue Type: Sub-task > Components: contrib/gridmix > Affects Versions: 0.24.0 > Reporter: Amar Kamat > Assignee: Amar Kamat > Labels: cpu-emulation, gridmix > Fix For: 0.24.0 > > Attachments: mapreduce-2591-v1.4.2.patch, mapreduce-2591-v1.7.patch > > > CPU emulation in Gridmix fails to meet the expected target if the map has no data to sort/spill/merge. There are 2 major reasons for this: > 1. The map task end immediately ends soon after the map task. The map progress is 67% while the map phase ends. > 2. Currently, the sort (comparator) doesnt emulate CPU. If the map is short lived, the CPU emulation thread (spawned from the map task in cleanup) doesn't get a chance to emulate. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa For more information on JIRA, see: http://www.atlassian.com/software/jira