Bug 571696
| Summary: | severe memory performance regression | ||||||||
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| Product: | [Fedora] Fedora | Reporter: | Matt Chan <talcite> | ||||||
| Component: | kernel | Assignee: | Kernel Maintainer List <kernel-maint> | ||||||
| Status: | CLOSED CURRENTRELEASE | QA Contact: | Fedora Extras Quality Assurance <extras-qa> | ||||||
| Severity: | medium | Docs Contact: | |||||||
| Priority: | low | ||||||||
| Version: | 12 | CC: | anton, dougsland, gansalmon, itamar, jonathan, kernel-maint, talcite | ||||||
| Target Milestone: | --- | ||||||||
| Target Release: | --- | ||||||||
| Hardware: | All | ||||||||
| OS: | Linux | ||||||||
| Whiteboard: | |||||||||
| Fixed In Version: | Doc Type: | Bug Fix | |||||||
| Doc Text: | Story Points: | --- | |||||||
| Clone Of: | Environment: | ||||||||
| Last Closed: | 2010-11-03 23:16:35 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: | |||||||||
| Attachments: |
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Created attachment 398750 [details]
2.6.32 benchmarks
The new 2.6.32.9-70 kernel update seems to fix this issue. Thanks everyone! Matt This message is a reminder that Fedora 12 is nearing its end of life. Approximately 30 (thirty) days from now Fedora will stop maintaining and issuing updates for Fedora 12. It is Fedora's policy to close all bug reports from releases that are no longer maintained. At that time this bug will be closed as WONTFIX if it remains open with a Fedora 'version' of '12'. Package Maintainer: If you wish for this bug to remain open because you plan to fix it in a currently maintained version, simply change the 'version' to a later Fedora version prior to Fedora 12's end of life. Bug Reporter: Thank you for reporting this issue and we are sorry that we may not be able to fix it before Fedora 12 is end of life. If you would still like to see this bug fixed and are able to reproduce it against a later version of Fedora please change the 'version' of this bug to the applicable version. If you are unable to change the version, please add a comment here and someone will do it for you. Although we aim to fix as many bugs as possible during every release's lifetime, sometimes those efforts are overtaken by events. Often a more recent Fedora release includes newer upstream software that fixes bugs or makes them obsolete. The process we are following is described here: http://fedoraproject.org/wiki/BugZappers/HouseKeeping |
Created attachment 398749 [details] 2.6.31 benchmarks Description of problem: The memory performance in 2.6.32 has regressed severely. Benchmarks show on my T42 that write performance has dropped from 146MB/s to 9MB/s. There is a noticeable delay in most applications and processes. Version-Release number of selected component (if applicable): 2.6.32.9-67.fc12.i686 How reproducible: always Steps to Reproduce: 1. Boot kernel 2.6.32 2. 3. Actual results: severe performance degradation Expected results: normal or improved performance Additional info: I have attached two benchmarks of the system with sysbench and gtkperf. One is in the old 2.6.31 kernel, and the other is in the new 2.6.32 kernel. The memory test is second from the bottom.