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Mon, 02 Dec 2024 17:55:31 +0100 Message-ID: <9c78aebb3fdb8af68937a0301fabc3acb3e20c2d.camel@gmx.de> Subject: Re: [PATCH V2] sched/fair: Dequeue sched_delayed tasks when waking to a busy CPU From: Mike Galbraith To: Phil Auld Cc: Peter Zijlstra , mingo@redhat.com, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, rostedt@goodmis.org, bsegall@google.com, mgorman@suse.de, vschneid@redhat.com, linux-kernel@vger.kernel.org, kprateek.nayak@amd.com, wuyun.abel@bytedance.com, youssefesmat@chromium.org, tglx@linutronix.de Date: Mon, 02 Dec 2024 17:55:28 +0100 In-Reply-To: <20241202162427.GB1226982@pauld.westford.csb> References: <0befc9ed8979594d790a8d4fe7ff5c5534c61c3c.camel@gmx.de> <20241112154140.GC336451@pauld.westford.csb> <81de2f710d8922a47364632335ff5ba1a45625b3.camel@gmx.de> <95ff75cacab4720bbbecd54e881bb94d97087b45.camel@gmx.de> <20241114112854.GA471026@pauld.westford.csb> <20241119113016.GB66918@pauld.westford.csb> <915eab00325f2bf608bcb2bd43665ccf663d4084.camel@gmx.de> <20241121115628.GB394828@pauld.westford.csb> <20241202162427.GB1226982@pauld.westford.csb> 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:EqcxqgEYh4BKH4hYDeWjs+360ZQwyo02TKETRikHRsI6sYNtIfp wF8xchbfCHqtqbqKzUgPt8tOT3zqp1F4PIDBtpk+L+qg3UymLq5R9PINzV6qQddIXQosy1j xVlvzq/tNLvgrwwVRgeZsT2cosWXRub2gJq9laf7SIHc5CzFFL5TIkUyvlvZFmjBLx7F8Jc VoFhJcdgEr3UUXcCppoXw== X-Spam-Flag: NO UI-OutboundReport: notjunk:1;M01:P0:NAJr8xofO3M=;V7H/Yze5YqFw8AzXa9bQxRk4JGP +T8Zu9onSf2eTuwtz1GH/PmyEQDRGM8HxsxZTL39kyUI5UucjS3Vl8o4LDBUwd6ogLN+o0HbT VmdCXrwEZdCGqhq6uqZL17tdyQl0lIfuRYqIweMsDxSfdbnZnqCfITlGW1b2dsXuefKXqInXz XH8cs1Ii/ieNmZDkxF4C+0efsVlFuQ9i5TxQDSVHp+LYfxafMHNBAGjNfmJNUu/ICApUjlas0 DmVplvpBTwYftx5oIEqfz4hYTqPBBkxKv4g9S+WB0ZiBMpR4M3v8249kSnqH7HrOor5zXKNZd RnySUmfEAjOOywaD/uwp90cGGZRUvtHLJHI5izT2S+1Zzwd/BWoWVGvd+IUfMTwLsm88AaMbS QzBQm4Q2WKrtCKqR/Uc9j6de0glAozpbnh3zshUtmsM6uRaHShM48gDHVJF7GPY6ylVYnU8HG fAGaFwcJ83+mHl6dZhBMPlg9jsXcMUVY7LEmGFYYGdRz+23eEICJIaLTz7ZPt3KH+IBQvZNC1 UcmuCZjv0V2C/ObDoaB8DS2kO84UncZO+FCy8nm8J08UHPxEnRVx+qrJHnK1qO9Syrj0BhGX7 BByfv8tOZhAHe2GBOALtH/Zzrk9j9r8FnV7T39Jwo/Wx9iREQUrEwoBCtHt1hZxc5c8+9+naq itjtIekxaR84QPi31iwQXWuuNyEf7AvjVae0/0LQM116MH79rfR+9RMbb9IIUWxurnNe2Q2jf NiPHWimuvd66t4ZKwPC5sJs94H+sTWxkFtGciqWnfhn7Mp5nCeV6hK0hm8BBcHv349xrjXTpZ oFTrKhr2gEI4N6i+mndWV/51QR8cOx+p/cQBWNJUqlzFQqRCNKDyytvJNuKeLXd2VElr4ai3l LXt+/1DS98T6CSXZXk7C/OatjD8C2NmT2pdzxLL+rL6wapSmB/4ih2iDn62+E468tMQptUCjK ep6Wp4Eu10HhqLB9J6hOa3cIoAJkqMKUZgoQ8v5SERG9v05T7ejt8YJml8Bv+0H5G/mEPbW3u O1apsKWpbKlITGt4Nzzb2onPou4P5wvSQr34iyv7S/8ke3sIlxGlTC2taNtHIkTgAb3yj6Qq/ us/q9EbDItry7ZkKaMrUJyCuVe5ilu On Mon, 2024-12-02 at 11:24 -0500, Phil Auld wrote: > On Sat, Nov 23, 2024 at 09:44:40AM +0100 Mike Galbraith wrote: > > > > Question: did wiping off the evil leave any meaningful goodness behind= ? > > Is that for this patch? Yeah. Trying it on my box with your write command line didn't improve the confidence level either. My box has one CPU handling IRQs and waking pinned workers to service 8 fio instances. Patch was useless for that. -Mike