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=-8.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham 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 2EA9BC433ED for ; Wed, 5 May 2021 14:41:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id EB36E613C7 for ; Wed, 5 May 2021 14:41:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233233AbhEEOl6 (ORCPT ); Wed, 5 May 2021 10:41:58 -0400 Received: from shelob.surriel.com ([96.67.55.147]:38398 "EHLO shelob.surriel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233192AbhEEOl5 (ORCPT ); Wed, 5 May 2021 10:41:57 -0400 Received: from imladris.surriel.com ([96.67.55.152]) by shelob.surriel.com with esmtpsa (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94) (envelope-from ) id 1leIhu-0006ci-GP; Wed, 05 May 2021 10:40:58 -0400 Message-ID: <9296a6244d4aada03633ae6e8a984df372089fff.camel@surriel.com> Subject: Re: [PATCH 1/6] delayacct: Use sched_clock() From: Rik van Riel To: Peter Zijlstra , tglx@linutronix.de, mingo@kernel.org, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, rostedt@goodmis.org, bsegall@google.com, mgorman@suse.de, bristot@redhat.com, bsingharora@gmail.com, pbonzini@redhat.com, maz@kernel.org Cc: linux-kernel@vger.kernel.org, kvm@vger.kernel.org, hannes@cmpxchg.org Date: Wed, 05 May 2021 10:40:57 -0400 In-Reply-To: <20210505111525.001031466@infradead.org> References: <20210505105940.190490250@infradead.org> <20210505111525.001031466@infradead.org> Content-Type: multipart/signed; micalg="pgp-sha256"; protocol="application/pgp-signature"; boundary="=-4hXqd8YByiR6kjvdagQA" User-Agent: Evolution 3.34.4 (3.34.4-1.fc31) MIME-Version: 1.0 Sender: riel@shelob.surriel.com Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --=-4hXqd8YByiR6kjvdagQA Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Wed, 2021-05-05 at 12:59 +0200, Peter Zijlstra wrote: > Like all scheduler statistics, use sched_clock() based time. >=20 > Signed-off-by: Peter Zijlstra (Intel) Looks like this works even on messed up systems because the delayacct code is called from the same CPU at sleep time and wakeup time, before a task is migrated. Reviewed-by: Rik van Riel --=20 All Rights Reversed. --=-4hXqd8YByiR6kjvdagQA Content-Type: application/pgp-signature; name="signature.asc" Content-Description: This is a digitally signed message part Content-Transfer-Encoding: 7bit -----BEGIN PGP SIGNATURE----- iQEzBAABCAAdFiEEKR73pCCtJ5Xj3yADznnekoTE3oMFAmCSrnkACgkQznnekoTE 3oO6YQgAqiTwiWVDFt9ana4e9J7G4PRzEAbmg4QYW5bmmFRzmQQ/e1kcbPmC2MQ4 o0I5b14YBTIK64k8g+xE0kp3OBQPoXdeBHGTx94WU962lKyM0RkZ9kxC3XL282DB 7K+ikkM6VZFbStDDokJJi9GQazdmqRIXHDh2cI7xxElb9MMSSacYaj8Agh9w4tVU U8xwJEd0UNMjEbT5E/CebWAJ1p+8p0vSKLLrIpVtEz97AsnsjgAkPWQuOIsZlNhR wEYZc8R/4k9sFzQb7xsKnkXkFdBKBEJRo8ptyTDtPTJ0kbrW4Y1RgSzNY9seg88G pEHk+DeB8wbzIEoJ+S8pnTL27cPheg== =5CYx -----END PGP SIGNATURE----- --=-4hXqd8YByiR6kjvdagQA--