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=-0.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS autolearn=no 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 9B3B0C433E1 for ; Wed, 8 Jul 2020 07:09:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7990D20773 for ; Wed, 8 Jul 2020 07:09:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1594192158; bh=rHOulDo124Liq2EGXRwvQ6OiyVaGckCmrxScyta+9xA=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=mZVvAhwueQPOsB9kXmnzrEa+TEI6HYbLcj4saP26bwRESgSySSvbDxRRR/V7sLvbV 9WpMF7m/tRvXA9LC1SyMbPsYHywIi+xii8zeJQtmW1eYgvmAStx/b6H5xvbgehsAgw 1OlhVbR/8VzSkyezlaDn6yQy7rKan8HioaW9rB5Y= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730100AbgGHHJR (ORCPT ); Wed, 8 Jul 2020 03:09:17 -0400 Received: from mail.kernel.org ([198.145.29.99]:40550 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729805AbgGHHJQ (ORCPT ); Wed, 8 Jul 2020 03:09:16 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 75FFF206DF; Wed, 8 Jul 2020 07:09:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1594192156; bh=rHOulDo124Liq2EGXRwvQ6OiyVaGckCmrxScyta+9xA=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=d3j/u+u9spT8gnCzMCkgwg/K1QFFKQ0rOx8IRsOUdrSDcFpXoFr8vPcWU5adRpKLu 41xusDKZhTnUZv8c7jDpWivTFwLYZhqQ8A5cxlrl0IL6jH9haKF6BZ1RfPtnPQtR11 9n9L6L27EEgPwoIhEifE4R8jmy3FXooLo0CbtfFU= Date: Wed, 8 Jul 2020 09:09:12 +0200 From: Greg KH To: Martin Zaharinov Cc: "linux-kernel@vger kernel. org" , Florian Westphal , Eric Dumazet Subject: Re: Bug Report High CPU Usage events_power_efficient Message-ID: <20200708070912.GA351187@kroah.com> References: <91805D0F-2D74-4EA3-A2D7-13E4FBBEAB51@gmail.com> <6AD52867-83C1-4C6C-A0AE-4DE0D6C16310@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Jul 08, 2020 at 09:50:49AM +0300, Martin Zaharinov wrote: > Add Greg , Florian, Eric to this bug > > > On 7 Jul 2020, at 22:54, Martin Zaharinov wrote: > > > > And this is log from /sys/kernel/debug/tracing/trace > > > > > > # entries-in-buffer/entries-written: 32410/32410 #P:64 > > # > > # _-----=> irqs-off > > # / _----=> need-resched > > # | / _---=> hardirq/softirq > > # || / _--=> preempt-depth > > # ||| / delay > > # TASK-PID CPU# |||| TIMESTAMP FUNCTION > > # | | | |||| | | > > <...>-57259 [005] .... 29619.680698: workqueue_execute_start: work struct 00000000ef22e4b8: function gc_worker [nf_conntrack] > > <...>-57259 [005] .... 29623.811407: workqueue_execute_end: work struct 00000000ef22e4b8: function gc_worker [nf_conntrack] > > <...>-57259 [005] .... 29623.811410: workqueue_execute_start: work struct 0000000000aeec55: function fb_flashcursor > > <...>-57259 [005] .... 29623.811421: workqueue_execute_end: work struct 0000000000aeec55: function fb_flashcursor > > <...>-57259 [005] .... 29623.811422: workqueue_execute_start: work struct 00000000a6d382bb: function vmstat_update > > <...>-57259 [005] .... 29623.811435: workqueue_execute_end: work struct 00000000a6d382bb: function vmstat_update > > > >> On 7 Jul 2020, at 22:44, Martin Zaharinov wrote: > >> > >> the problem is hear with kernel 5.7.7 > >> > >> last work kernel without this problem is 5.6.7 > >> > >> hear is more info: > >> > >> cat /proc/57259/stack > >> root@megacableamarilis:~# cat /proc/57259/stack > >> [<0>] gc_worker+0x1be/0x380 [nf_conntrack] > >> [<0>] process_one_work+0x1bc/0x3b0 > >> [<0>] worker_thread+0x4d/0x460 > >> [<0>] kthread+0x10d/0x130 > >> [<0>] ret_from_fork+0x1f/0x30 > >> > >> PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 57259 root 28 0 0 0 0 R 69.8 0.0 82:42.14 kworker/5:2+events_power_efficient > >> 32 root 21 0 0 0 0 R 31.0 0.0 87:06.33 ksoftirqd/4 > >> > >> > >> Please help to fix this problem > >> > >>> On 22 Apr 2020, at 15:55, Martin Zaharinov wrote: > >>> > >>> Hello Qian and Greg > >>> With latest 5.6.x kernel have problem with events_power_efficient 28488 root 28 0 0 0 0 R 95.5 0.0 101:38.19 kworker/2:1+events_power_efficient Process start to load machine after 3-4 hour and load not stop only reboot machine remove process . Server runing on AMD EPIC CPU 2x 7301 32Gb Ram Have 2 x 10G card Intel when machine load over 1G traffic machine locked and only restart fix problem to next load . After move traffic and server stop load process still hear and load server ? > >>> And after reboot process move to other core . Have you used 'git bisect' to try to find the offending commit? Without that, it's going to be hard to help you out here. thanks, greg k-h