linux-kernel - Re: Bug Report High CPU Usage events_power

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Date:   Tue, 7 Jul 2020 22:44:15 +0300
From:   Martin Zaharinov <micron10@...il.com>
To:     "linux-kernel@...r kernel. org" <linux-kernel@...r.kernel.org>
Subject: Re: Bug Report High CPU Usage events_power_efficient

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@...acableamarilis:~# 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 <micron10@...il.com> 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 .
> 
> Best Regards,
> Martin