[Kernel-packages] [Bug 1488426] Re: High CPU usage of kworker/ksoftirqd

2016-05-11 Thread MShepanski 
I'm hitting this problem on Ubuntu 16.04. Process kworker/0:1 is using
70% of one of my cores.


$ uname -a
Linux pkkid-work 4.4.0-22-generic #39-Ubuntu SMP Thu May 5 16:53:32 UTC 2016 
x86_64 x86_64 x86_64 GNU/Linux


$ lsusb
Bus 002 Device 003: ID 046d:c051 Logitech, Inc. G3 (MX518) Optical Mouse
Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 002: ID 046d:c31c Logitech, Inc. Keyboard K120
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub


$ lspci
00:00.0 Host bridge: Intel Corporation Xeon E3-1200 v2/3rd Gen Core processor 
DRAM Controller (rev 09)
00:01.0 PCI bridge: Intel Corporation Xeon E3-1200 v2/3rd Gen Core processor 
PCI Express Root Port (rev 09)
00:14.0 USB controller: Intel Corporation 7 Series/C210 Series Chipset Family 
USB xHCI Host Controller (rev 04)
00:16.0 Communication controller: Intel Corporation 7 Series/C210 Series 
Chipset Family MEI Controller #1 (rev 04)
00:19.0 Ethernet controller: Intel Corporation 82579LM Gigabit Network 
Connection (rev 04)
00:1a.0 USB controller: Intel Corporation 7 Series/C210 Series Chipset Family 
USB Enhanced Host Controller #2 (rev 04)
00:1b.0 Audio device: Intel Corporation 7 Series/C210 Series Chipset Family 
High Definition Audio Controller (rev 04)
00:1d.0 USB controller: Intel Corporation 7 Series/C210 Series Chipset Family 
USB Enhanced Host Controller #1 (rev 04)
00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev a4)
00:1f.0 ISA bridge: Intel Corporation Q77 Express Chipset LPC Controller (rev 
04)
00:1f.2 RAID bus controller: Intel Corporation SATA Controller [RAID mode] (rev 
04)
00:1f.3 SMBus: Intel Corporation 7 Series/C210 Series Chipset Family SMBus 
Controller (rev 04)
01:00.0 VGA compatible controller: NVIDIA Corporation GK107 [GeForce GT 640 
OEM] (rev a1)
01:00.1 Audio device: NVIDIA Corporation GK107 HDMI Audio Controller (rev a1)

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https://bugs.launchpad.net/bugs/1488426

Title:
  High CPU usage of kworker/ksoftirqd

Status in HWE Next:
  New
Status in linux package in Ubuntu:
  In Progress

Bug description:
  kworker consuming 71.5% cpu resource
  ksoftirqd consuming 28.9% cpu resource

  It leads to power consumption issue and sometimes leads to BT does not
  work.

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[Kernel-packages] [Bug 1488426] Re: High CPU usage of kworker/ksoftirqd

2016-05-18 Thread MShepanski 
This solution worked for me.  I'm not exactly sure what I disabled, but I'll 
take my chances at a broken thing over a core spinning at 100% constantly.
https://bbs.archlinux.org/viewtopic.php?id=184913

1. find out the "gpe" that is causing the bad stuff with something like:
   $ grep . -r /sys/firmware/acpi/interrupts/

2. Check for an high value (mine was gpe08 with a value like 200K). Change the
   following accordingly.  Backup the gpe file..
   $ cp /sys/firmware/acpi/interrupts/gpe13 /pathtobackup

3. Create a crontab entry to disable the gpe on reboot:
   $ sudo crontab -e
   @reboot echo "disable" > /sys/firmware/acpi/interrupts/gpe08

4. To make it work after wakeup from suspend:
   $ touch /etc/pm/sleep.d/30_disable_gpe13
   $ chmod +x /etc/pm/sleep.d/30_disable_gpe13
   $ vim /etc/pm/sleep.d/30_disable_gpe13

4a: Add this as the script in step 4:

#!/bin/bash
case "$1" in
  thaw|resume)
echo disable > /sys/firmware/acpi/interrupts/gpe13 2>/dev/null
;;
  *)
;;
esac
exit $?

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You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1488426

Title:
  High CPU usage of kworker/ksoftirqd

Status in HWE Next:
  New
Status in linux package in Ubuntu:
  In Progress

Bug description:
  kworker consuming 71.5% cpu resource
  ksoftirqd consuming 28.9% cpu resource

  It leads to power consumption issue and sometimes leads to BT does not
  work.

To manage notifications about this bug go to:
https://bugs.launchpad.net/hwe-next/+bug/1488426/+subscriptions

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Mailing list: https://launchpad.net/~kernel-packages
Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help   : https://help.launchpad.net/ListHelp