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 Received: from lists.lttng.org (lists.lttng.org [167.114.26.123]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 658EAC433EF for ; Thu, 23 Jun 2022 03:57:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=lists.lttng.org; s=default; t=1655956667; bh=bkoqyYq1y6cNxSAhUXBRNeGq87Dw9EXAmN5lXnqSmrw=; h=Date:To:Cc:References:In-Reply-To:Subject:List-Id: List-Unsubscribe:List-Archive:List-Post:List-Help:List-Subscribe: From:Reply-To:From; b=KbWR9jIoUs2uKvbvnn0r/esb3L4eNV1ETKYUUUXGIz8y3XvdEjkBmAd5VU5t4AKVa ZGK6g4ygST6iA8yOAXd+nVf2DAuoSGI8fVjH0XTw0tBXCsx4wkUNU/WZiSt5191oM/ ZgFCd1lvChGN0+SXFbiS4Zje8LR8oRcjPk1UbVwUSy4Fe9Q2cFCH4DTL2DrElORakJ fJs0fYTtDJwSZTJrC/jJ3hjDuxCulTE5/0o+zDh8cslMId7XO9n3c2kIh2z2/wvTcc FKzkiG4LwK93GUspKlhYSRHQaz9h5mLxFSNxOKKS9nlNZ9M9ptQXoDj1plgAES+6gl ARbkmCw1LFIUg== Received: from lists-lttng01.efficios.com (localhost [IPv6:::1]) by lists.lttng.org (Postfix) with ESMTP id 4LT60V3hVlzCqm; Wed, 22 Jun 2022 23:57:46 -0400 (EDT) Received: from smtpbgjp3.qq.com (smtpbgjp3.qq.com [54.92.39.34]) by lists.lttng.org (Postfix) with ESMTPS id 4LT60R63nRzCh5 for ; Wed, 22 Jun 2022 23:57:43 -0400 (EDT) X-QQ-mid: bizesmtp71t1655956647t5mchksv Received: from localhost.localdomain ( [116.24.154.153]) by bizesmtp.qq.com (ESMTP) with id ; Thu, 23 Jun 2022 11:57:25 +0800 (CST) X-QQ-SSF: 01400000000000B0G000000A0000000 X-QQ-FEAT: shjifG7MkPUvzLcQ9RvSXcvSbS0YYw/Hp0E1j9/EShpbSL3qJoqqwH3TqTypX 25/i/MgXylwGJdIKcNoBfSn73U4ivZ1JmU5qd9CKosq2wGmjQjP3NkoTMJpcf3pjmTwXZgn a4JNzGq2kcVTwtJB+L/EoZ10NcSP+nlARcB5DyBzGBLRhdoFQDB8e6alQhCdMXKuWLiKweM uUB+QdPJxn/PI0VwFdO+LPQ4l9vugDEdbFMNWUqSs2gisqemKBXX8mBWeKVNMRP4KvER7bt hN0b01d3KrdB5a1bXn2Kusa9KoCoYq/e2hMt7DcngB8LYruD/A2+96t4bKubRFMk43lnJeR Fw91mpDyJ771+T9BPk= X-QQ-GoodBg: 2 Date: Wed, 22 Jun 2022 23:57:22 -0400 To: Mathieu Desnoyers Cc: lttng-dev , paulmck Message-ID: <20220623035722.GA271206@localhost.localdomain>+CCEFE5C72E6CA40A References: <20220614035533.GA174967@localhost.localdomain> <20220615034900.GA187807@localhost.localdomain> <396090936.61897.1655302558168.JavaMail.zimbra@efficios.com> <20220616080912.GA246781@localhost.localdomain> <1711122492.5944.1655473043420.JavaMail.zimbra@efficios.com> <20220621035206.GA267474@localhost.localdomain> <1843612610.17820.1655817158376.JavaMail.zimbra@efficios.com> <20220622074535.GA269641@localhost.localdomain> <1420937751.21327.1655903998961.JavaMail.zimbra@efficios.com> <20220623034528.GA271179@localhost.localdomain> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20220623034528.GA271179@localhost.localdomain> User-Agent: Mutt/1.10.1 (2018-07-13) X-QQ-SENDSIZE: 520 Feedback-ID: bizesmtp:szsandstone.com:qybgforeign:qybgforeign4 X-QQ-Bgrelay: 1 Subject: Re: [lttng-dev] ***UNCHECKED*** Re: Re: urcu workqueue thread uses 99% of cpu while workqueue is empty X-BeenThere: lttng-dev@lists.lttng.org X-Mailman-Version: 2.1.39 Precedence: list List-Id: LTTng development list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , From: Minlan Wang via lttng-dev Reply-To: Minlan Wang Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: lttng-dev-bounces@lists.lttng.org Sender: "lttng-dev" On Wed, Jun 22, 2022 at 11:45:28PM -0400, Minlan Wang wrote: > The session output is in attachment: 0623_futex-20220623-112754.tar.bz2 Hi, Mathieu, There are several workqueues in the process i tracked. The one used to trigger the issuse is this: thread with vtid=21054, and futex = 0x5652A1035C40 B.R Minlan _______________________________________________ lttng-dev mailing list lttng-dev@lists.lttng.org https://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev