Bug 1505158 – RFE: Improve RT throttling mechanism [rhel-7.4.z]

Bugzilla will be upgraded to version 5.0. The upgrade date is tentatively scheduled for 2 December 2018, pending final testing and feedback.

Bug 1505158 - RFE: Improve RT throttling mechanism [rhel-7.4.z]

Summary:	RFE: Improve RT throttling mechanism [rhel-7.4.z]

Status:	CLOSED ERRATA

Aliases:	None

Product:	Red Hat Enterprise Linux 7
Classification:	Red Hat
Component:	kernel-rt (Show other bugs)
Sub Component:
Version:	7.4
Hardware:	Unspecified Unspecified

Priority	high Severity medium
Target Milestone:	rc
Target Release:	---
Assigned To:	Clark Williams
QA Contact:	Jiri Kastner
Docs Contact:

URL:
Whiteboard:
Keywords:	FutureFeature, ZStream

Depends On:	1401061
Blocks:
	Show dependency tree / graph

Reported:	2017-10-22 12:07 EDT by Oneata Mircea Teodor
Modified:	2017-11-30 11:03 EST (History)
CC List:	10 users (show)

See Also:
Fixed In Version:	kernel-rt-3.10.0-693.11.1.rt56.629.el7
Doc Type:	Enhancement
Doc Text:	The current realtime throttling mechanism prevents the starvation of non-realtime tasks by CPU-intensive realtime tasks. When a realtime run queue is throttled, it allows non-realtime tasks to run. If there are not non-realtime tasks, the CPU goes idle. To safely maximize CPU usage by decreasing the CPU idle time, the RT_RUNTIME_GREED scheduler feature has been implemented. When enabled, this feature checks if non-realtime tasks are starving before throttling the realtime task. The RT_RUNTIME_GREED scheduler option guarantees some run time on all CPUs for the non-realtime tasks, while keeping the realtime tasks running as much as possible.
Story Points:	---
Clone Of:	1401061
Environment:
Last Closed:	2017-11-30 11:03:50 EST
Type:	---
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

Attachments	(Terms of Use)
Add an attachment (proposed patch, testcase, etc.)

External Trackers
Tracker	ID	Priority	Status	Summary	Last Updated
Red Hat Product Errata	RHSA-2017:3322	normal	SHIPPED_LIVE	Moderate: kernel-rt security, bug fix, and enhancement update	2017-11-30 15:18:55 EST

Groups: None (edit)

Description Oneata Mircea Teodor 2017-10-22 12:07:13 EDT

This bug has been copied from bug #1401061 and has been proposed to be backported to 7.4 z-stream (EUS).

Comment 9 errata-xmlrpc 2017-11-30 11:03:50 EST

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHSA-2017:3322

Note You need to log in before you can comment on or make changes to this bug.