From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mout.gmx.net (mout.gmx.net [212.227.17.20]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 33C0B2AE77 for ; Tue, 8 Oct 2024 04:59:36 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=212.227.17.20 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728363581; cv=none; b=a7+mhzDmqPsPH/uMjhq5ssQrioRI4ZDFL08p0SyIaW3Iw+5KEdhmrWzlKckh8Hgvo2/68IetdF2+pQQKgrH5vKABkT18eD0PpOr7Q+sAaKWEBBwnkNZGg2pvp8hziFV8CtwwU+nUv795NDojWKvBxUCv3u1NsAY/CLPJRs4aDbA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728363581; c=relaxed/simple; bh=2he7TmWRGX1I2Xw6fbx3AGiAfCkQ1CA7w92o52NR8BA=; h=Message-ID:Subject:From:To:Cc:Date:In-Reply-To:References: Content-Type:MIME-Version; b=Nz5gUAZTa7fhLOnTiPyibr0nPpnvU4wzVutRVxl9DCe4xPc+icBT4N1rdGsSx2pBtJ87zbaScREqVm4AztAqcp9QinQAymjxH1nEs0zwcY0LcEygBl0zTHReEiWXef2SAzEtqx9Kgkro1+t9HAXIgk1jZ6NTmUwmcErJHdRwPFg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=gmx.de; spf=pass smtp.mailfrom=gmx.de; dkim=pass (2048-bit key) header.d=gmx.de header.i=efault@gmx.de header.b=kxPK2ldM; arc=none smtp.client-ip=212.227.17.20 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=gmx.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmx.de Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmx.de header.i=efault@gmx.de header.b="kxPK2ldM" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmx.de; s=s31663417; t=1728363541; x=1728968341; i=efault@gmx.de; bh=t7Mi51R4XOjeAh4Ma/htACrQooHwkpYDidzpIPppMO8=; h=X-UI-Sender-Class:Message-ID:Subject:From:To:Cc:Date:In-Reply-To: References:Content-Type:MIME-Version:Content-Transfer-Encoding:cc: content-transfer-encoding:content-type:date:from:message-id: mime-version:reply-to:subject:to; b=kxPK2ldMw9knAsSRXIVDbedv/gzFIRKKOi2NzRaZzhAQI5YGj1ZbH2PSjGhu6eFN cjWH+cyMvLq726uf9IlAmPyZ2e0OZUgoBigMEv/AzI3hOAUGbCDAxm09bTuwYAXEi 0qIxasv2aKWq37fzB0cWdcN5pO083A8Ol9Edz1mw6ZXZh4wY/NrBZ4a3IiwiZGTDa o/82o6icuEqLCX91c3rYy97ucqCRBjkKVpvbKFgIMDugFUBiXuFoC0UgmAvf1kglf v+2TQa3Lq3m8uV/t6FFOW0sKsTTrlKDztJdZj4gJisZML8o2oH9C8i9TFPRCaLVpr SoCDb9F+E0wSBw9A4w== X-UI-Sender-Class: 724b4f7f-cbec-4199-ad4e-598c01a50d3a Received: from homer.fritz.box ([91.212.106.175]) by mail.gmx.net (mrgmx105 [212.227.17.168]) with ESMTPSA (Nemesis) id 1MTRQq-1tPYYj2nVs-00XriT; Tue, 08 Oct 2024 06:59:01 +0200 Message-ID: <579b7ea34ef6e2f7c955abdfc0929fe1af36faef.camel@gmx.de> Subject: Re: [PATCH 0/5] sched: Lazy preemption muck From: Mike Galbraith To: Peter Zijlstra , bigeasy@linutronix.de, tglx@linutronix.de, mingo@kernel.org Cc: linux-kernel@vger.kernel.org, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, rostedt@goodmis.org, bsegall@google.com, mgorman@suse.de, vschneid@redhat.com, ankur.a.arora@oracle.com Date: Tue, 08 Oct 2024 06:58:59 +0200 In-Reply-To: <20241007074609.447006177@infradead.org> References: <20241007074609.447006177@infradead.org> Content-Type: text/plain; charset="UTF-8" User-Agent: Evolution 3.42.4 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Provags-ID: V03:K1:A7EstQL3oyLhEMJa/owq7meZyzz0bcwvLkshWm8E0o7LlVlLiJM Q07BuLFhNXsQAzvw8ovCA6/K4VDh/CmUllw58y1YeyAf1QZ9gOJSfccZK87y2urSDUT7ENh +zLZK677gVLaykcqwg4LovT8E6UdLqeWcX2JpW1/FCVwxbP4vyrUCHXJFYCNU1rDFS6n5lN fu7g8yfVU0m6JgmUu8wVA== X-Spam-Flag: NO UI-OutboundReport: notjunk:1;M01:P0:PYkBP5A4XTU=;xRT87POMenAt0qWCbZ7E2TacIFG sddqhwtHF1ehFs71fYJHK6HTfILYj3BmylaC+KpUIIEng4Lcs25fWijoEOkCz+xvYY4jbBdE3 Z41bXwMNlmYhgZTBj6RfXjbowtlShOwJXHVb0lKLYg/OHCeTXsuJYwIVA7Hn+Hko4UMMyWI+L lBFEWjnhQXh/+gaDWi6CqByPcnK1xHvueS4Xu4SvDFpdsWe3Cb6xXsAoHkRXTOb9DqzgdFJMv KeaWue7+A4k+cDvjWe4JtHY05yMyEn0UGhcGGUB/32K8A95lLd5LS3T2Z2wvzqaSDtntabzup 65sfgzLQBhHsCaC/9pGJTvnRuhu8E5Purrnnl/owB2tZ0ZaGV83Ith+8JVBUvaRnCswrm9tC/ oAHdAjOUD2MazypLDA/f4+1mkpTHyHnRTbpXcyGCcu028S+ONZnYtbjCKk6y3R5ULMuDi5SSo 4qp8hGVHNWoNegENxtXNHLTgRBH0pZOQy/iD6TbjF2S+6uuoD4kzVyWvSpFoBledse4LV8i+G W2eS3ZceahdjAvxyoSGjXiI8R/TJxQNJ2Uxv6lzNiI+eV8S0I8UepS9cK/rnQap73U000qq7v Zhgt0va5+CASRWxdyD7fT3d/1n7s2iTj4248JsFob0x4OaovJQjoct6ZieBBj9m6P9IAlzssW sfQ4KCkJvq4EbhszcDCuQXZXn7SZrbivxY/+0IVxPyGGG3ng+E9SM429sJ5PPOx77sQmhUbeO 2WVJbUMXcChwxcveD4SJ5Pb/vbVOHwgJiZFFjv+3aLVp3yQqJ26z0QbBtvvuqIs8NII6F5gFu yLrTMPvIl+MZQm4hYcEtx9vA== On Mon, 2024-10-07 at 09:46 +0200, Peter Zijlstra wrote: > Hi! > > During LPC Thomas reminded me that the lazy preemption stuff was not the= re yet. > > So here goes, robot says it builds, and I checked both a regular and PRE= EMPT_RT > build boots and can change the mode. > > Please have a poke. My box seems content. I'm gonna miss VOLATILE (voluntary;) when it's eventually whacked, but not a lot.. or at all general case, security and whatnot over time have beaten up high end switchers far worse. tbench 8 30s - single run, box=3Di7-4790 master static voluntary 3620.45 MB/sec 1.000 mean3 3613.45 stddev3 14.08 voluntary 2706.54 MB/sec .747 +cpu_mitigations voluntary 4028.72 MB/sec 1.112 nostalgia (4.4.231) preempt 3449.35 MB/sec .952 none 3631.99 MB/sec 1.003 master dynamic none 3548.19 MB/sec .980 voluntary 3495.77 MB/sec .965 full 3476.50 MB/sec .960 lazy 3473.95 MB/sec .959 laziest 3492.09 MB/sec .964 master dynamic rt full 2352.58 MB/sec .649 lazy 2986.28 MB/sec .824 laziest 2977.63 MB/sec .822 distro kernel dynamic none 1744.51 MB/sec .481 none 2189.74 MB/sec .604 mitigations=3Doff