Bug 443155
| Summary: | [cpuidle] Notebook "pauses" when idle with tickless kernel enabled | ||
|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | James <james> |
| Component: | kernel | Assignee: | John Feeney <jfeeney> |
| Status: | CLOSED WONTFIX | QA Contact: | Fedora Extras Quality Assurance <extras-qa> |
| Severity: | high | Docs Contact: | |
| Priority: | low | ||
| Version: | 15 | CC: | ddaney |
| 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: | 2011-08-29 14:03:30 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: | |||
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Description
James
2008-04-18 20:59:33 UTC
Can you try playing with the "processor.max_cstate" kernel parameter? Try processor.max_cstate=1 first and if that works keep increasing it until it fails. I *think* it first starts to happen when processor.max_cstate=2.
Is it normal that the C-state usage counts should reset every so often?
[james@rhapsody ~]$ cat /proc/acpi/processor/CPU0/power ; sleep 5 ; cat
/proc/acpi/processor/CPU0/power
active state: C0
max_cstate: C2
bus master activity: 00000000
maximum allowed latency: 2000 usec
states:
C1: type[C1] promotion[--] demotion[--] latency[001]
usage[00000006] duration[00000000000000000000]
C2: type[C2] promotion[--] demotion[--] latency[001]
usage[00001126] duration[00000000000010058129]
C3: type[C3] promotion[--] demotion[--] latency[017]
usage[00000000] duration[00000000000000000000]
active state: C0
max_cstate: C2
bus master activity: 00000000
maximum allowed latency: 2000 usec
states:
C1: type[C1] promotion[--] demotion[--] latency[001]
usage[00000001] duration[00000000000000000000]
C2: type[C2] promotion[--] demotion[--] latency[001]
usage[00000307] duration[00000000000003693784]
C3: type[C3] promotion[--] demotion[--] latency[017]
usage[00000000] duration[00000000000000000000]
I am seeing identical behaviour on my F9 install on my notebook: [daney@silver64 ~]$ cat /proc/cpuinfo processor : 0 vendor_id : AuthenticAMD cpu family : 15 model : 36 model name : Mobile AMD Athlon(tm) 64 Processor 4000+ stepping : 2 cpu MHz : 800.000 cache size : 1024 KB fpu : yes fpu_exception : yes cpuid level : 1 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 syscall nx mmxext fxsr_opt lm 3dnowext 3dnow up rep_good pni lahf_lm bogomips : 1592.86 TLB size : 1024 4K pages clflush size : 64 cache_alignment : 64 address sizes : 40 bits physical, 48 bits virtual power management: ts fid vid ttp tm stc [daney@silver64 ~]$ cat /proc/version Linux version 2.6.25.3-18.fc9.x86_64 (mockbuild@) (gcc version 4.3.0 20080428 (Red Hat 4.3.0-8) (GCC) ) #1 SMP Tue May 13 04:54:47 EDT 2008 As with the original poster, I am running with nohz=off to work-around. But this not ideal as one of the main reasons I upgraded to F9 was for the presumed power savings from the tickless kernel. Just an update from my previous post. With 'processor.max_cstate=2' all is well. When I increase it to 3, I encounter the problem. The most observable symptom for me is that the console output while shutting down pauses or freezes for long periods. I guess I will run with processor.max_cstate=2, and hope that in the future it will not be necessary to hack up the kernel command line. Still there in kernel-2.6.25.11-54.fc8. Still present in kernel-2.6.26.3-14.fc8. See at least once in kernel-PAE-2.6.26.6-46.fc8. Also observed under x86-84 with kernel-2.6.26.6-79.fc9.x86_64. Also in kernel-2.6.27.4-58.fc10.x86_64 from Rawhide. This message is a reminder that Fedora 8 is nearing its end of life. Approximately 30 (thirty) days from now Fedora will stop maintaining and issuing updates for Fedora 8. 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 '8'. 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 8'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 8 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 Still does it with kernel-2.6.27.7-132.fc10.x86_64. Most often noticed during shutdown (although sometimes during startup when udev is starting) and I have to keep pressing the any key to get it to finish up and switch off. Still in kernel-2.6.27.9-155.fc10.x86_64. ...and in kernel-2.6.27.9-163.fc10.x86_64. Still in all the latest Fedora 11 kernels from Koji. This message is a reminder that Fedora 11 is nearing its end of life. Approximately 30 (thirty) days from now Fedora will stop maintaining and issuing updates for Fedora 11. 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 '11'. 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 11'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 11 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 This message is a reminder that Fedora 13 is nearing its end of life. Approximately 30 (thirty) days from now Fedora will stop maintaining and issuing updates for Fedora 13. 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 '13'. 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 13'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 13 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 Still present in latest F15 kernel, kernel-2.6.40.3-0.fc15.x86_64 |