From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-eopbgr80129.outbound.protection.outlook.com ([40.107.8.129]:5635 "EHLO EUR04-VI1-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S229558AbhIANSD (ORCPT ); Wed, 1 Sep 2021 09:18:03 -0400 Subject: Re: Question: t/io_uring performance References: <9025606c-8579-bf81-47ea-351fc7ec81c3@kit.edu> <867506cc-642e-1047-08c6-aae60e7294c5@criteo.com> <5b58a227-c376-1f3e-7a10-1aa5483bdc0d@kit.edu> <1b1c961d-ddba-18de-e0ff-fd8cf60f5da8@kit.edu> From: Erwan Velu Message-ID: <74c59a8b-9475-6554-7d93-f9c5f26cc652@criteo.com> Date: Wed, 1 Sep 2021 15:17:03 +0200 In-Reply-To: <1b1c961d-ddba-18de-e0ff-fd8cf60f5da8@kit.edu> Content-Type: text/plain; charset="utf-8"; format="flowed" Content-Transfer-Encoding: 8bit Content-Language: en-US MIME-Version: 1.0 List-Id: fio@vger.kernel.org To: Hans-Peter Lehmann , "fio@vger.kernel.org" Le 01/09/2021 à 12:36, Hans-Peter Lehmann a écrit : > I couldn't find details about Jens' processor frequency but I would be > surprised if he had ~3 times the frequency of ours (2.0 GHz base, 3.2 > GHz boost). Can you check how the processor performance goes during the run ? This would help ensuring the processors clocks perfectly during your run. To ease this part, you can use the exec module I committed recently in fio : https://github.com/axboe/fio/blob/master/examples/exec.fio There is an example on how dumping the cpuperf in // of a particular workload. If you don't want to use this, you can just run the turbostat cmdline I'm sharing in this example. Cheers, Erwan,