Bug 59748
Summary: | VM problem cripples shm performance (Oracle) | ||||||
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Product: | [Retired] Red Hat Linux | Reporter: | Tim Wright <timw> | ||||
Component: | kernel | Assignee: | Arjan van de Ven <arjanv> | ||||
Status: | CLOSED CURRENTRELEASE | QA Contact: | Brian Brock <bbrock> | ||||
Severity: | medium | Docs Contact: | |||||
Priority: | high | ||||||
Version: | 7.2 | CC: | johan.lithander | ||||
Target Milestone: | --- | ||||||
Target Release: | --- | ||||||
Hardware: | i686 | ||||||
OS: | Linux | ||||||
Whiteboard: | |||||||
Fixed In Version: | Doc Type: | Bug Fix | |||||
Doc Text: | Story Points: | --- | |||||
Clone Of: | Environment: | ||||||
Last Closed: | 2002-04-10 19:22:17 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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Description
Tim Wright
2002-02-12 17:02:10 UTC
Created attachment 45480 [details]
Test program.
The test program should be invoked on a raw partition setup using the raw command. Blocksize of 4096 (1 page) is fine. Number of blocks in the file depends on the size of the partition. We've used 32MB/512 for a raid which makes the workload effectively cache. Number of preads needs to be a decent size (50,000). The MALLOC numbers remain steady, the SHM numbers drop off once the page/buffer cache is populated. I haven't looked at your program yet (that's next ;) but I just finished building a kernel with a "slightly differently tuned vm" http://people.redhat.com/arjanv/testkernels Have you had a chance to test the test kernels? |