From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mark Nelson Subject: Re: speed decrease since firefly,giant,hammer the 2nd try Date: Tue, 10 Feb 2015 15:38:07 -0600 Message-ID: <54DA7A3F.6070009@redhat.com> References: <54DA541E.9000608@profihost.ag> <54DA578F.3000900@redhat.com> <54DA5853.3070504@profihost.ag> <54DA5E9F.3060305@redhat.com> <54DA6904.6000305@profihost.ag> <54DA6BB9.7000306@redhat.com> <54DA7404.4060201@profihost.ag> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from mx1.redhat.com ([209.132.183.28]:51553 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753822AbbBJViY (ORCPT ); Tue, 10 Feb 2015 16:38:24 -0500 In-Reply-To: <54DA7404.4060201@profihost.ag> Sender: ceph-devel-owner@vger.kernel.org List-ID: To: Stefan Priebe , "ceph-devel@vger.kernel.org" On 02/10/2015 03:11 PM, Stefan Priebe wrote: > > mhm i installed librbd1-dbg and librados2-dbg - but the output still > looks useless to me. Should i upload it somewhere? Meh, if it's all just symbols it's probably not that helpful. I've summarized your results here: 1 concurrent 4k write (libaio, direct=1, iodepth=1) IOPS Latency wb on wb off wb on wb off dumpling 10870 536 ~100us ~2ms firefly 10350 525 ~100us ~2ms So in single op tests dumpling and firefly are far closer. Now let's see each of these cases with iodepth=32 (still 1 thread for now). Mark > > Stefan > -- > To unsubscribe from this list: send the line "unsubscribe ceph-devel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html