Bug 599332
Summary: | e1000 and e1000e driver behaviour differences [rhel-5.5.z] | ||
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Product: | Red Hat Enterprise Linux 5 | Reporter: | RHEL Program Management <pm-rhel> |
Component: | kernel | Assignee: | Jiri Pirko <jpirko> |
Status: | CLOSED ERRATA | QA Contact: | Red Hat Kernel QE team <kernel-qe> |
Severity: | urgent | Docs Contact: | |
Priority: | urgent | ||
Version: | 5.3 | CC: | agospoda, dhoward, dnelson, esammons, gcase, jesse.brandeburg, jpirko, jwest, jwilson, pm-eus, rkhan, rpacheco, vfalico |
Target Milestone: | rc | Keywords: | ZStream |
Target Release: | --- | ||
Hardware: | All | ||
OS: | Linux | ||
Whiteboard: | |||
Fixed In Version: | Doc Type: | Bug Fix | |
Doc Text: |
The e1000 and e1000e drivers for Intel PRO/1000 network devices were updated with an enhanced algorithm for adaptive interrupt modulation in the Red Hat Enterprise Linux 5.1 release. When InterruptThrottleRate was set to "1" (thus enabling the new adaptive mode), certain traffic patterns could have caused high CPU usage. This update provides a way to set InterruptThrottleRate to "4", which switches the mode back to the simpler and non-adaptive algorithm. Doing so may decrease CPU usage by the e1000 and e1000e drivers depending on traffic patterns.
Note: you can change the InterruptThrottleRate setting using the ethtool utility by running the following command:
ethtool -C ethX rx-usecs 4
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Story Points: | --- |
Clone Of: | Environment: | ||
Last Closed: | 2010-07-01 18:28:38 UTC | Type: | --- |
Regression: | --- | Mount Type: | --- |
Documentation: | --- | CRM: | |
Verified Versions: | Category: | --- | |
oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
Cloudforms Team: | --- | Target Upstream Version: | |
Embargoed: | |||
Bug Depends On: | 586416 | ||
Bug Blocks: |
Description
RHEL Program Management
2010-06-03 07:10:50 UTC
*** Bug 599331 has been marked as a duplicate of this bug. *** in 2.6.18-194.6.1.el5 Technical note added. If any revisions are required, please edit the "Technical Notes" field accordingly. All revisions will be proofread by the Engineering Content Services team. New Contents: The e1000 and e1000e drivers for Intel PRO/1000 network devices were updated with an enhanced algorithm for adaptive interrupt modulation in the Red Hat Enterprise Linux 5.1 release. When InterruptThrottleRate was set to "1" (thus enabling the new adaptive mode), certain traffic patterns could have caused high CPU usage. This update provides a way to set InterruptThrottleRate to "4", which switches the mode back to the simpler and non-adaptive algorithm. Doing so may decrease CPU usage by the e1000 and e1000e drivers depending on traffic patterns. Note: you can change the InterruptThrottleRate setting using the ethtool utility by running the following command: ethtool -C ethX rx-usecs 4 An advisory has been issued which should help the problem described in this bug report. This report is therefore being closed with a resolution of ERRATA. For more information on therefore solution and/or where to find the updated files, please follow the link below. You may reopen this bug report if the solution does not work for you. http://rhn.redhat.com/errata/RHSA-2010-0504.html |