Bug 12490 - Improve latency of IPFire systems
Summary: Improve latency of IPFire systems
Status: NEW
Alias: None
Product: IPFire
Classification: Unclassified
Component: --- (show other bugs)
Version: 2
Hardware: unspecified Unspecified
: - Unknown - - Unknown -
Assignee: Michael Tremer
QA Contact:
URL:
Keywords:
Depends on:
Blocks: KERNEL5
  Show dependency treegraph
 
Reported: 2020-09-29 08:11 UTC by Michael Tremer
Modified: 2020-09-29 08:11 UTC (History)
0 users

See Also:


Attachments

Note You need to log in before you can comment on or make changes to this bug.
Description Michael Tremer 2020-09-29 08:11:36 UTC
We should reconfigure the kernel as follows:

* CONFIG_NO_HZ_FULL=y
* CONFIG_HZ=1000
* CONFIG_PREEMPT=y

This will make IPFire systems more responsive to any network events without any significant downsides. There will be some downsize in "throughput" which refers to memory bandwidth and L1 cache invalidation which won't be a problem for our application at all.

There is more about this here: https://www.kernel.org/doc/Documentation/timers/NO_HZ.txt