Bug 84109
Summary: | scheduler priority bug | ||
---|---|---|---|
Product: | [Retired] Red Hat Linux | Reporter: | Marc Schmitt <marc.schmitt> |
Component: | kernel | Assignee: | Arjan van de Ven <arjanv> |
Status: | CLOSED ERRATA | QA Contact: | Brian Brock <bbrock> |
Severity: | medium | Docs Contact: | |
Priority: | medium | ||
Version: | 7.3 | CC: | jss, rmj |
Target Milestone: | --- | ||
Target Release: | --- | ||
Hardware: | i386 | ||
OS: | Linux | ||
Whiteboard: | |||
Fixed In Version: | 2.4.20-13.7smp | Doc Type: | Bug Fix |
Doc Text: | Story Points: | --- | |
Clone Of: | Environment: | ||
Last Closed: | 2003-05-27 12:53:31 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
Marc Schmitt
2003-02-12 11:46:59 UTC
We are seeing something similar. PID USER PRI NI SIZE RSS SHARE STAT %CPU %MEM TIME CO 2175 maw 39 19 47864 46M 2276 R N 99.2 4.6 6:51 cloudy.exe 15198 derosa 25 0 7140 7140 3532 R 50.2 0.6 116:51 xspec 1748 swa 25 0 21304 14M 1288 R 49.7 1.4 8:05 cosmomc Here two nice zero jobs are sharing one cpu with a nice 19 job having the other cpu to itself. Surely this is a scheduling bug? Kernel version is 2.4.18-24.7.xsmp for Athlon on redhat 7.3. Tyan Tiger MP, 2x Athlon MP processors. I did an upgrade to 2.4.18-27.7.xsmp, the problem remains: 11:42am up 2 days, 2:01, 33 users, load average: 3.01, 3.29, 3.16 203 processes: 198 sleeping, 5 running, 0 zombie, 0 stopped CPU0 states: 96.2% user, 3.3% system, 11.3% nice, 0.0% idle CPU1 states: 95.0% user, 4.2% system, 94.1% nice, 0.0% idle Mem: 2064336K av, 1933252K used, 131084K free, 0K shrd, 110096K buff Swap: 2096472K av, 0K used, 2096472K free 1236936K cached PID USER PRI NI SIZE RSS SHARE STAT %CPU %MEM TIME COMMAND 10364 gonnet 39 19 2428 2428 304 R N 95.0 0.1 1:29 Switch4.LI 10405 gonnet 25 0 322M 322M 596 R 84.3 15.9 2:18 mapleTTY 10685 gonnet 39 19 2416 2416 296 R N 12.2 0.1 0:02 Switch4.LI 1917 root 5 -10 308M 51M 5116 S < 4.1 2.5 154:25 X 20918 gonnet 15 0 16604 16M 14804 R 2.1 0.8 0:14 kdeinit 10678 gonnet 15 0 1212 1212 916 R 1.1 0.0 0:00 top 20857 gonnet 15 0 13768 13M 13012 S 0.1 0.6 4:15 kdeinit 20891 gonnet 15 0 18060 17M 15264 S 0.1 0.8 1:44 kdeinit 20902 gonnet 15 0 16652 16M 14804 S 0.1 0.8 0:15 kdeinit 1 root 15 0 480 480 420 S 0.0 0.0 0:07 init You can see that the top process is at nice 19, while the one at nice 0 does not get as much cpu. In normal circustances, the nice 0 should get 100% and the other two at nice 19 50% each. Could someone look into this, please? Thanks. The problem is gone in 2.4.20-13.7smp, I'm closing this bug. Thanks! |