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Tue, 07 Jul 2020 23:50:51 -0700 (PDT) Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 13.4 \(3608.80.23.2.2\)) Subject: Re: Bug Report High CPU Usage events_power_efficient From: Martin Zaharinov In-Reply-To: <6AD52867-83C1-4C6C-A0AE-4DE0D6C16310@gmail.com> Date: Wed, 8 Jul 2020 09:50:49 +0300 Cc: gregkh@linuxfoundation.org, Florian Westphal , Eric Dumazet Content-Transfer-Encoding: quoted-printable Message-Id: References: <91805D0F-2D74-4EA3-A2D7-13E4FBBEAB51@gmail.com> <6AD52867-83C1-4C6C-A0AE-4DE0D6C16310@gmail.com> To: "linux-kernel@vger kernel. org" X-Mailer: Apple Mail (2.3608.80.23.2.2) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add Greg , Florian, Eric to this bug=20 > On 7 Jul 2020, at 22:54, Martin Zaharinov wrote: >=20 > And this is log from /sys/kernel/debug/tracing/trace >=20 >=20 > # entries-in-buffer/entries-written: 32410/32410 #P:64 > # > # _-----=3D> irqs-off > # / _----=3D> need-resched > # | / _---=3D> hardirq/softirq > # || / _--=3D> 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 >=20 >> On 7 Jul 2020, at 22:44, Martin Zaharinov wrote: >>=20 >> the problem is hear with kernel 5.7.7=20 >>=20 >> last work kernel without this problem is 5.6.7 >>=20 >> hear is more info: >>=20 >> 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 >>=20 >> 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 = =20 >> 32 root 21 0 0 0 0 R 31.0 0.0 87:06.33 = ksoftirqd/4 >>=20 >>=20 >> Please help to fix this problem >>=20 >>> On 22 Apr 2020, at 15:55, Martin Zaharinov = wrote: >>>=20 >>> Hello Qian and Greg=20 >>> 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 . >>>=20 >>> Best Regards, >>> Martin >>=20 >=20