Received: from malur.postgresql.org ([217.196.149.56]) by arkaria.postgresql.org with esmtp (Exim 4.80) (envelope-from ) id 1X0SUw-0007xq-Sw for pgsql-performance@arkaria.postgresql.org; Fri, 27 Jun 2014 09:31:11 +0000 Received: from localhost ([127.0.0.1] helo=postgresql.org) by malur.postgresql.org with smtp (Exim 4.80) (envelope-from ) id 1X0SUw-00088B-Aq for pgsql-performance@arkaria.postgresql.org; Fri, 27 Jun 2014 09:31:10 +0000 Received: from makus.postgresql.org ([2001:4800:1501:1::229]) by malur.postgresql.org with esmtps (TLS1.2:DHE_RSA_AES_256_CBC_SHA256:256) (Exim 4.80) (envelope-from ) id 1X0SUu-00085h-Sn for pgsql-performance@postgresql.org; Fri, 27 Jun 2014 09:31:09 +0000 Received: from [2404:130:0:10::40:2] (helo=mail.catalyst.net.nz) by makus.postgresql.org with esmtp (Exim 4.80) (envelope-from ) id 1X0SUr-0003HM-1u for pgsql-performance@postgresql.org; Fri, 27 Jun 2014 09:31:07 +0000 Received: from localhost (localhost [127.0.0.1]) by mail.catalyst.net.nz (Postfix) with ESMTP id 1240E324AB; Fri, 27 Jun 2014 21:31:01 +1200 (NZST) X-Virus-Scanned: Debian amavisd-new at catalyst.net.nz Received: from mail.catalyst.net.nz ([127.0.0.1]) by localhost (bertrand.catalyst.net.nz [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id Zff8GmPAC3uL; Fri, 27 Jun 2014 21:31:00 +1200 (NZST) Received: from [192.168.1.64] (122-62-5-20.jetstream.xtra.co.nz [122.62.5.20]) (Authenticated sender: mark.kirkwood) by mail.catalyst.net.nz (Postfix) with ESMTPSA id 6AD0B31D16; Fri, 27 Jun 2014 21:31:00 +1200 (NZST) Message-ID: <53AD39D3.5080202@catalyst.net.nz> Date: Fri, 27 Jun 2014 21:30:59 +1200 From: Mark Kirkwood User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.6.0 MIME-Version: 1.0 To: Andres Freund CC: pgsql-performance@postgresql.org Subject: Re: 60 core performance with 9.3 References: <53ACB190.2030206@catalyst.net.nz> <53ACD6C4.9050605@catalyst.net.nz> <20140627091951.GA16680@awork2.anarazel.de> In-Reply-To: <20140627091951.GA16680@awork2.anarazel.de> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Host-Lookup-Failed: Reverse DNS lookup failed for 2404:130:0:10::40:2 (failed) X-Pg-Spam-Score: 0.3 (/) List-Archive: List-Help: List-ID: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: X-Mailing-List: pgsql-performance Precedence: bulk Sender: pgsql-performance-owner@postgresql.org On 27/06/14 21:19, Andres Freund wrote: > On 2014-06-27 14:28:20 +1200, Mark Kirkwood wrote: >> My feeling is spinlock or similar, 'perf top' shows >> >> kernel find_busiest_group >> kernel _raw_spin_lock >> >> as the top time users. > > Those don't tell that much by themselves, could you do a hierarchical > profile? I.e. perf record -ga? That'll at least give the callers for > kernel level stuff. For more information compile postgres with > -fno-omit-frame-pointer. > Excellent suggestion, will do next week! regards Mark -- Sent via pgsql-performance mailing list (pgsql-performance@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance