From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-3.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E41FBC388F9 for ; Wed, 11 Nov 2020 18:39:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 853E2205CB for ; Wed, 11 Nov 2020 18:39:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727430AbgKKSjH (ORCPT ); Wed, 11 Nov 2020 13:39:07 -0500 Received: from mail.monom.org ([188.138.9.77]:42210 "EHLO mail.monom.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726460AbgKKSjF (ORCPT ); Wed, 11 Nov 2020 13:39:05 -0500 Received: from mail.monom.org (localhost [127.0.0.1]) by filter.mynetwork.local (Postfix) with ESMTP id A727F500596; Wed, 11 Nov 2020 19:39:02 +0100 (CET) Received: from localhost (unknown [94.31.100.251]) by mail.monom.org (Postfix) with ESMTPSA id 3EFDF500108; Wed, 11 Nov 2020 19:39:02 +0100 (CET) Date: Wed, 11 Nov 2020 19:39:01 +0100 From: Daniel Wagner To: Sebastian Andrzej Siewior Cc: Thomas Gleixner , LKML , linux-rt-users , Steven Rostedt Subject: Re: [ANNOUNCE] v5.10-rc2-rt4 Message-ID: <20201111183901.GA23846@beryllium> References: <20201104104617.ueefmpdou4t3t2ce@linutronix.de> <20201104111948.vpykh3ptmysqhmve@beryllium.lan> <20201104124746.74jdsig3dffomv3k@beryllium.lan> <20201104130930.llx56gtqt532h7c7@linutronix.de> <20201104160650.b63zqof74wohgpa2@beryllium.lan> <20201106105447.2lasulgjrbqdhnlh@linutronix.de> <20201106161413.7c65uxenamy474uh@beryllium.lan> <20201109124718.ljf7inok4zakkjed@linutronix.de> <20201109143703.ps7gxhqrirhntilr@beryllium.lan> <20201109163143.tm5gjz77rr734lm5@linutronix.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20201109163143.tm5gjz77rr734lm5@linutronix.de> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Sorry for the late response, I had to reinstall my system after a FS corruption... On Mon, Nov 09, 2020 at 05:31:43PM +0100, Sebastian Andrzej Siewior wrote: > > These test run only very short with hackbench as worlkload (5 minutes). > > Though I running these tests now for more than year with v4.4-rt and > > some times the newer -rt releases and I've never seen the latency > > numbers above 200us unless something was broken. Given that 5 minutes is > > not really long, I'll let those test run for longer to see if I get the > > same results when they run for one hour. - 5.9.0-rc8-rt12, ca 5h T: 0 (11626) P:80 C:15092432 Min: 17 Act: 34 Avg: 43 Max: 226 - 5.9.0-rc8-rt13, ca 1.5h T: 0 (24661) P:80 C:5581936 Min: 21 Act: 35 Avg: 45 Max: 250 - 5.9.0-rc8-rt14, ca 1h T: 0 ( 942) P:80 C:6522320 Min: 20 Act: 27 Avg: 44 Max: 352 This matches with the 5 minutes runs. -rt13 was still okay and -rt14 is clearly worse. > > 5.10.0-rc2-rt4 vs 5.10.0-rc2-rt4(lazy preemption disabled) > > > > 0_cyclicdeadline t2-max-latency pass/pass 274.00/ 61.00 349.18% > > So the value went from 274us to 61us after disabling lazy-preempt? Yes, that was all I changed. I want to redo this measurement. It really looks a bit bogus. Though, one thing after the other :) Daniel