| Summary: | Responsiveness has become worse since about beginning of the year | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 6 | Reporter: | Albert Flügel <af> |
| Component: | qemu-kvm | Assignee: | Radim Krčmář <rkrcmar> |
| Status: | CLOSED INSUFFICIENT_DATA | QA Contact: | Virtualization Bugs <virt-bugs> |
| Severity: | unspecified | Docs Contact: | |
| Priority: | unspecified | ||
| Version: | 6.4 | CC: | af, bsarathy, chayang, juzhang, michen, mkenneth, qzhang, rbalakri, virt-maint |
| Target Milestone: | rc | ||
| Target Release: | --- | ||
| Hardware: | Unspecified | ||
| OS: | Unspecified | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2015-03-13 17:42:08 UTC | Type: | Bug |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
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Description
Albert Flügel
2013-11-25 11:47:59 UTC
Additional Info: On a different host system (Also RHEL6 in same patch level) i have other virtual instances running and there it's just the same. It was all fine some months ago but now i see these pauses. In the meantime i played a bit with that and found: Reducing the number of CPUs of the virtual CentOS-4 instance to 2 changed the situation significantly. Overview: Host system: Sun X2200 with 4 CPU cores 6 Virtual systems: # OS #CPUs 1 CentOS-6.4 2 1 CentOS-5.9 2 1 Fedora-17 2 2 RHEL-5.6 4 1 CentOS-4.8 2 (now, had 4 before) Now when none of the virtual hosts has notable load (what is true most of the time), any single node is very responsive. If any of the systems has a bit more load, e.g. one virtual CPU is 100% busy, the situation is like before: All of them are really slow and hardly usable. Unlike a year ago, there seems to be a quite sharp line in the total load. If the load is higher than this limit, all virtual systems show very bad responsiveness. I'd be interested in options to configure the scheduler that is managing the qemu processes, if there are any. Albert, thanks for taking the time to enter a bug report with us. We appreciate the feedback and look to use reports such as this to guide our efforts at improving our products. That being said, we're not able to guarantee the timeliness or suitability of a resolution for issues entered here because this is not a mechanism for requesting support. If this issue is critical or in any way time sensitive, please raise a ticket through your regular Red Hat support channels to make certain it receives the proper attention and prioritization to assure a timely resolution. For information on how to contact the Red Hat production support team, please visit: https://www.redhat.com/support/process/production/#howto Albert, are you still experiencing these hangs? Did old kernel work well with newer qemu-kvm? (kernel-2.6.32-279.19.1.el6.x86_64 and qemu-kvm-0.12.1.2-2.415.el6_5.3.x86_64) Thank you. (In reply to Radim Krčmář from comment #7) > Albert, are you still experiencing these hangs? > > Did old kernel work well with newer qemu-kvm? > (kernel-2.6.32-279.19.1.el6.x86_64 and > qemu-kvm-0.12.1.2-2.415.el6_5.3.x86_64) Setting needinfo. Thanks for the inquiry ! Unfortunately i have currently no possibility to test this. So please feel free to close this bug for now. As soon as i have the chance to check that again, i can reopen, if necessary. Is that ok for you ? (In reply to Albert Flügel from comment #9) > Thanks for the inquiry ! Unfortunately > i have currently no possibility to test this. > So please feel free to close this bug for now. > As soon as i have the chance to check that again, i can reopen, if necessary. > Is that ok for you ? OK, thanks. |