[{"id":1776924,"web_url":"http://patchwork.ozlabs.org/comment/1776924/","msgid":"<87r2uruoxr.fsf@linux.vnet.ibm.com>","list_archive_url":null,"date":"2017-09-28T09:56:16","subject":"Re: [Skiboot] [PATCH 0/5] POWER9 idle pm support","submitter":{"id":48041,"url":"http://patchwork.ozlabs.org/api/people/48041/","name":"Stewart Smith","email":"stewart@linux.vnet.ibm.com"},"content":"Nicholas Piggin writes:\n> These patches implement initial idle power management support for\n> POWER9. Immediate benefit should be slightly faster execution of\n> boot code due to SMT switching, and a bit lower power use for other\n> cores during boot.\n\nOn Boston, we now seem to be spending a total of about 9-10 seconds in\nskiboot. Wow. Literally half the time of on p8 Openpower systems.\n\nMerged to master as of cca6c3408711a8971dfc8c3331d381741012775f\n\n(seems to have survived my tests as well as anything else has)","headers":{"Return-Path":"","X-Original-To":["incoming@patchwork.ozlabs.org","skiboot@lists.ozlabs.org"],"Delivered-To":["patchwork-incoming@bilbo.ozlabs.org","skiboot@lists.ozlabs.org"],"Received":["from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3])\n\t(using TLSv1.2 with cipher ADH-AES256-GCM-SHA384 (256/256 bits))\n\t(No client certificate requested)\n\tby ozlabs.org (Postfix) with ESMTPS id 3y2qpZ3Y1pz9t5l\n\tfor ;\n\tThu, 28 Sep 2017 19:56:38 +1000 (AEST)","from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3])\n\tby lists.ozlabs.org (Postfix) with ESMTP id 3y2qpZ0CHlzDsPv\n\tfor ;\n\tThu, 28 Sep 2017 19:56:38 +1000 (AEST)","from mx0a-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com\n\t[148.163.158.5])\n\t(using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256\n\tbits)) (No client certificate requested)\n\tby lists.ozlabs.org (Postfix) with ESMTPS id 3y2qpP2FlMzDsPp\n\tfor ; Thu, 28 Sep 2017 19:56:28 +1000 (AEST)","from pps.filterd (m0098420.ppops.net [127.0.0.1])\n\tby mx0b-001b2d01.pphosted.com (8.16.0.21/8.16.0.21) with SMTP id\n\tv8S9sRNh129550\n\tfor ; Thu, 28 Sep 2017 05:56:24 -0400","from e32.co.us.ibm.com (e32.co.us.ibm.com [32.97.110.150])\n\tby mx0b-001b2d01.pphosted.com with ESMTP id 2d8vxyema6-1\n\t(version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT)\n\tfor ; Thu, 28 Sep 2017 05:56:24 -0400","from localhost\n\tby e32.co.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use\n\tOnly! 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Violators will be prosecuted; \n\tThu, 28 Sep 2017 03:56:22 -0600","from b03ledav005.gho.boulder.ibm.com\n\t(b03ledav005.gho.boulder.ibm.com [9.17.130.236])\n\tby b03cxnp08025.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with\n\tESMTP id v8S9uLbG262608; Thu, 28 Sep 2017 02:56:21 -0700","from b03ledav005.gho.boulder.ibm.com (unknown [127.0.0.1])\n\tby IMSVA (Postfix) with ESMTP id CD9B4BE03A;\n\tThu, 28 Sep 2017 03:56:21 -0600 (MDT)","from birb.localdomain (unknown [9.81.202.147])\n\tby b03ledav005.gho.boulder.ibm.com (Postfix) with SMTP id 051FABE038; \n\tThu, 28 Sep 2017 03:56:20 -0600 (MDT)","by birb.localdomain (Postfix, from userid 1000)\n\tid D69464E87E5; Thu, 28 Sep 2017 19:56:16 +1000 (AEST)"],"Authentication-Results":"ozlabs.org;\n\tspf=none (mailfrom) smtp.mailfrom=linux.vnet.ibm.com\n\t(client-ip=148.163.158.5; helo=mx0a-001b2d01.pphosted.com;\n\tenvelope-from=stewart@linux.vnet.ibm.com; receiver=)","From":"Stewart Smith ","To":"Nicholas Piggin , skiboot@lists.ozlabs.org","In-Reply-To":"<20170914111346.11970-1-npiggin@gmail.com>","References":"<20170914111346.11970-1-npiggin@gmail.com>","Date":"Thu, 28 Sep 2017 19:56:16 +1000","MIME-Version":"1.0","X-TM-AS-GCONF":"00","x-cbid":"17092809-0004-0000-0000-000012FCA2B9","X-IBM-SpamModules-Scores":"","X-IBM-SpamModules-Versions":"BY=3.00007803; HX=3.00000241; KW=3.00000007;\n\tPH=3.00000004; SC=3.00000232; SDB=6.00923525; UDB=6.00464287;\n\tIPR=6.00703663; \n\tBA=6.00005611; NDR=6.00000001; ZLA=6.00000005; ZF=6.00000009;\n\tZB=6.00000000; \n\tZP=6.00000000; ZH=6.00000000; ZU=6.00000002; MB=3.00017300;\n\tXFM=3.00000015; UTC=2017-09-28 09:56:23","X-IBM-AV-DETECTION":"SAVI=unused REMOTE=unused XFE=unused","x-cbparentid":"17092809-0005-0000-0000-000084447A47","Message-Id":"<87r2uruoxr.fsf@linux.vnet.ibm.com>","X-Proofpoint-Virus-Version":"vendor=fsecure engine=2.50.10432:, ,\n\tdefinitions=2017-09-28_04:, , signatures=0","X-Proofpoint-Spam-Details":"rule=outbound_notspam policy=outbound score=0\n\tspamscore=0 suspectscore=1\n\tmalwarescore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam\n\tadjust=0 reason=mlx scancount=1 engine=8.0.1-1707230000\n\tdefinitions=main-1709280150","Subject":"Re: [Skiboot] [PATCH 0/5] POWER9 idle pm support","X-BeenThere":"skiboot@lists.ozlabs.org","X-Mailman-Version":"2.1.24","Precedence":"list","List-Id":"Mailing list for skiboot development ","List-Unsubscribe":",\n\t","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n\t","Cc":"\"Gautham R . 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