Bug 88013
Summary: | Scheduler doesn't background nice 19 jobs | ||
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Product: | [Retired] Red Hat Raw Hide | Reporter: | Jeremy Sanders <jss> |
Component: | kernel | Assignee: | Dave Jones <davej> |
Status: | CLOSED WONTFIX | QA Contact: | Brian Brock <bbrock> |
Severity: | medium | Docs Contact: | |
Priority: | medium | ||
Version: | 1.0 | CC: | michael, pfrields |
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: | 2004-10-30 03:52:37 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: |
Description
Jeremy Sanders
2003-04-04 16:41:17 UTC
I tend to agree - processes which are niced at 19 are those which "if you can run, fine..." I run several things at 19 (time updates, random signature generation, etc.) that do not need any sort of priority (not 9% at least). This would probably include Ingo Molnar (author of the O(1) scheduler for the kernel - also works for Red Hat). Upstream? It does bring up a good point for the central kernel maintainers - gauging scheduling performance versus commerical UNIX kernels would be interesting to see how Linux fares out. This situation is getting worse. Using 2.4.20-13.7 on 7.3 gives 15% to the niced-19 process on a P4. It would be great if RH were to include Ingo Molnar's SCHED_BATCH feature to allow background execution of jobs when there are no other jobs running. I've contacted Ingo Molnar and he says he'll look into the nice 19 issue. |