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Tue, 08 Sep 2020 01:06:04 -0800 Received: from MTKMBS01N1.mediatek.inc (172.21.101.68) by MTKMBS62DR.mediatek.inc (172.29.94.18) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Tue, 8 Sep 2020 02:06:02 -0700 Received: from mtkcas07.mediatek.inc (172.21.101.84) by mtkmbs01n1.mediatek.inc (172.21.101.68) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Tue, 8 Sep 2020 17:05:46 +0800 Received: from mtkswgap22.mediatek.inc (172.21.77.33) by mtkcas07.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Tue, 8 Sep 2020 17:05:46 +0800 From: Jing-Ting Wu To: Peter Zijlstra , Matthias Brugger Subject: [PATCH 1/1] sched/rt: add rt throttled/unthrottled log Date: Tue, 8 Sep 2020 17:05:46 +0800 Message-ID: <1599555946-30802-1-git-send-email-jing-ting.wu@mediatek.com> X-Mailer: git-send-email 1.7.9.5 MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200908_050618_351131_E49ECDBE X-CRM114-Status: GOOD ( 12.22 ) X-Spam-Score: -0.2 (/) X-Spam-Report: SpamAssassin version 3.4.4 on merlin.infradead.org summary: Content analysis details: (-0.2 points) pts rule name description ---- ---------------------- -------------------------------------------------- 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.0 SPF_PASS SPF: sender matches SPF record 0.0 MIME_BASE64_TEXT RAW: Message text disguised using base64 encoding 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain 0.0 UNPARSEABLE_RELAY Informational: message has unparseable relay lines X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-arm-kernel@lists.infradead.org, Jing-Ting Wu , linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org, wsd_upstream@mediatek.com Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org Always print logs when rt throttle/unthrottle, it is much easier to locate the throttled period. Signed-off-by: Jing-Ting Wu --- kernel/sched/rt.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/kernel/sched/rt.c b/kernel/sched/rt.c index f215eea..598046c 100644 --- a/kernel/sched/rt.c +++ b/kernel/sched/rt.c @@ -902,6 +902,9 @@ static int do_sched_rt_period_timer(struct rt_bandwidth *rt_b, int overrun) rt_rq->rt_throttled = 0; enqueue = 1; + printk_deferred("sched: RT throttling inactivated cpu=%d\n", + i); + /* * When we're idle and a woken (rt) task is * throttled check_preempt_curr() will set @@ -970,7 +973,7 @@ static int sched_rt_runtime_exceeded(struct rt_rq *rt_rq) */ if (likely(rt_b->rt_runtime)) { rt_rq->rt_throttled = 1; - printk_deferred_once("sched: RT throttling activated\n"); + printk_deferred("sched: RT throttling activated\n"); } else { /* * In case we did anyway, make it go away,