From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51728 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S244832AbhIAODO (ORCPT ); Wed, 1 Sep 2021 10:03:14 -0400 Received: from scc-mailout-kit-02.scc.kit.edu (scc-mailout-kit-02.scc.kit.edu [IPv6:2a00:1398:9:f712::810d:e752]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 366BBC061575 for ; Wed, 1 Sep 2021 07:02:17 -0700 (PDT) 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> <74c59a8b-9475-6554-7d93-f9c5f26cc652@criteo.com> From: Hans-Peter Lehmann Message-ID: <2df22c68-6040-298e-4512-752cd10b7201@kit.edu> Date: Wed, 1 Sep 2021 16:02:13 +0200 MIME-Version: 1.0 In-Reply-To: <74c59a8b-9475-6554-7d93-f9c5f26cc652@criteo.com> Content-Type: text/plain; charset="utf-8"; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit List-Id: fio@vger.kernel.org To: Erwan Velu , "fio@vger.kernel.org" > Can you check how the processor performance goes during the run ? I just executed turbostat manually, like it was in your config file. Looks like the processor performance works as expected - the output clearly shows the point where I started/stopped a single-threaded t/io_uring run. The machine has 128 cores, so a Busy% of 0.78 is exactly one core. # turbostat -c package -qS --interval 5 -s Busy%,Bzy_MHz,Avg_MHz,CorWatt,PkgWatt,RAMWatt,PkgTmp Avg_MHz Busy% Bzy_MHz CorWatt PkgWatt 0 0.01 1500 0.01 68.91 0 0.01 1641 0.01 68.90 0 0.01 1621 0.01 68.91 0 0.03 1561 0.03 68.91 0 0.03 1547 0.02 68.93 0 0.01 1500 0.01 68.91 0 0.01 1657 0.01 68.89 26 0.78 3322 3.58 74.58 26 0.79 3328 3.63 74.72 26 0.79 3331 3.63 74.79 26 0.79 3321 3.66 74.87 26 0.79 3329 3.64 74.88 26 0.79 3328 3.65 74.92 26 0.79 3334 3.62 74.92 26 0.79 3329 3.62 74.94 23 0.69 3331 3.17 74.25 0 0.01 1664 0.00 69.12 0 0.01 1501 0.01 69.12 0 0.02 1566 0.01 69.10 0 0.00 1499 0.00 69.07 1 0.06 1558 0.04 69.10 Best regards, Hans-Peter