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Wed, 25 Sep 2024 07:14:41 +0200 Message-ID: Subject: Re: [PATCH 10/24] sched/uclamg: Handle delayed dequeue From: Mike Galbraith To: Luis Machado , Peter Zijlstra Cc: Dietmar Eggemann , Vincent Guittot , Hongyan Xia , mingo@redhat.com, juri.lelli@redhat.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: Wed, 25 Sep 2024 07:14:39 +0200 In-Reply-To: References: <20240905145354.GP4723@noisy.programming.kicks-ass.net> <20240906104525.GG4928@noisy.programming.kicks-ass.net> <8d0d01b9-a430-49cc-93a5-67b4d68aa35c@arm.com> <20240910140524.GH4723@noisy.programming.kicks-ass.net> <52ca4cea-8f65-434e-af17-e4bf664d9488@arm.com> <20240911084528.GJ4723@noisy.programming.kicks-ass.net> <4fde8f26a9aeaeafda15b81bbb17b0ffc96941f0.camel@gmx.de> <20240911091328.GM4723@noisy.programming.kicks-ass.net> <2030b198180259eede6384cc6a6bc9bc9f64f874.camel@gmx.de> <627e37090198cee91bf79c41b1cd8c20c2e2d71f.camel@gmx.de> <1e89e5bcbd43934c65f8da23e7fbd59da950a0a3.camel@gmx.de> 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:G7d7fKw8GXHdj+6ObhIWZuAYYPDyomyg6tl75e6yLlsrbnAMEGE v5Vr9l8JyYL80qVNw4/0f1+Gm3hm6yzArU5Lii5DTnWX2i2knOobefYzicowyttsMBzjnRL ElIOdn4oua4Bkq/DRho+pfvHa8ZgGUq9toM5jZQneYuIJ3Y078pjYml8w2oP+L61X3w1oVD mVp1LcqyBw+TMsfmeEzwQ== X-Spam-Flag: NO UI-OutboundReport: notjunk:1;M01:P0:kJ+b91tePTI=;RBcq5O6mN0s0aWHbv3S79iRms5U eRVmJwt/OTEW9vQmhQ2H96SVTrs+awsP5VAYo0C0OxFFnKl43jtyXIBqxPJz6CG4kNhyUBAdV 8lNUSV5oe/4zcrywMy9W/9NScrMzv47yjy29Wgu1im3V+bM69i47brEiWnQjPK4gZsDlzPVSf fubb3sqVrFFTHxEp4O/GgMmJFNOXNwtBiSfaX82X6hjGXCCiHyaIzBVl9EGTpWcoW+i6MvHpL G2mkFjXYn1PSr90qmh5Bgv0mRb41zU4TicFdTBqxlWkteavxaAv1GR+IjkCLftGEX7vr53eQg 7YWjidj62lo1CvbLR5og3eYhXaDvimKfpnGoHutF7vTmkBY7ZgjUEgaklQufEeJ5bPs2OL7hp zrECV5AswQLXr4llrwbwt+U5oSwyfCO/uf/uSq4V4UeV4QaIuNN68S5xQ9q2EuZwzyrpdTrlT eXJuETP8hiKHOlvRpoMuPg2l3w/VKVec4asjvSligegPKiKrn6SimvQyk6taBwyl71sUYKd4N Ux71yEYxh7NqdHF3fHQPCEGU8aSR8PQIN+YppGIT51NH9ZpYhpx9HGzz4bsLINvX/vGYc1034 DJTLRNWbRhLw0Gr4iUrvOypgUcS+m2uyp5TnUg5fei7cz2CjDwcXYznG13nPmfbyF/ouz73PK pg53/I37F9T4wKC7y4MqOzOgaFNn5q0xu10/fjmdAfXnBDb4ibcWaW++XJu560JLPAZozg1l3 xjdQzYIgDvfMQ4ccmWtwgcMDUZBHhZrejZp0iqFdVEW1CcGYuNe912Onprm6Jm7N4TpXatHt7 U7KMj6D3ZrAiijUUIinJO7ig== On Tue, 2024-09-24 at 19:35 +0200, Mike Galbraith wrote: > On Tue, 2024-09-24 at 16:16 +0100, Luis Machado wrote: > > On 9/14/24 04:40, Mike Galbraith wrote: > > > On Fri, 2024-09-13 at 18:39 +0200, Mike Galbraith wrote: > > > > tip 4c293d0fa315 (sans sched/eevdf: More PELT vs DELAYED_DEQUEUE) > > > > seems > > > > to be stable. > > > > > > Belay that, it went boom immediately this morning while trying to > > > trigger a warning I met elsewhere. > > > > > > =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0-Mike > > > > Are you still hitting this one? > > > > I was trying to reproduce this one on the Pixel 6 (manifests as > > a boot crash) but couldn't so far. Something might've changed a bit. > > I'm also having no luck triggering it. BTW, that includes hefty RT/!RT config beating sessions w/wo.. sched/eevdf: More PELT vs DELAYED_DEQUEUE ..and w/wo your mod to same, with dequeue on unthrottle patchlet to keep sched_delayed encounter there from interrupting the hunt. -Mike