Bug 653972
| Summary: | qcow2: Backport performance related patches | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 6 | Reporter: | Kevin Wolf <kwolf> |
| Component: | qemu-kvm | Assignee: | Kevin Wolf <kwolf> |
| Status: | CLOSED ERRATA | QA Contact: | Virtualization Bugs <virt-bugs> |
| Severity: | high | Docs Contact: | |
| Priority: | low | ||
| Version: | 6.1 | CC: | mjenner, mkenneth, tburke, virt-maint, wquan |
| Target Milestone: | rc | ||
| Target Release: | --- | ||
| Hardware: | Unspecified | ||
| OS: | Unspecified | ||
| Whiteboard: | |||
| Fixed In Version: | qemu-kvm-0.12.1.2-2.122.el6 | Doc Type: | Bug Fix |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2011-05-19 11:34:09 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: | |||
| Bug Depends On: | |||
| Bug Blocks: | 580951 | ||
|
Description
Kevin Wolf
2010-11-16 14:55:16 UTC
Benchmark iozone test with qemu-kvm-0.12.1.2-2.113.el6.x86_64(rhel6.0)and qemu-kvm-0.12.1.2-2.152.el6.x86_64 (rhel6.1)and the results was the average of 3
iterations.
iozone ci:
incache:iozone -a -i 0 -i 1 -s ${incache}k -r 64k -w -+u -R ./test -f /mnt/t1
dio:iozone -a -i 0 -i 1 -s ${incache}k -r 64k -I -w -+u -R ./test -f /mnt/t2
outcache:iozone -a -i 0 -i 1 -s ${outcache}k -r 64k -w -+u -R ./test -f /mnt/t3
Qcow2-local qcow2 cache=none elevator=deadline
Type Rhel6.0-virtio Rhel6.1-virtio Improvement%
Dio-Write 2982.33 111403.67 3635.46%
Dio-Rewrite 126111.67 127007.33 0.71%
Dio-Read 152177.33 148669.67 -2.30%
Dio-Reread 153957 151804 -1.40%
Incache-Write 33806.33 176658.67 422.56%
Incache-ReWrite 153125 179184.67 17.02%
Incache-Read 224914.67 995947 342.81%
Incache-Reread 608146.67 980144.67 61.17%
Out-of-Cache-Write 28324.67 156221 451.54%
Out-of-Cache-ReWrite 131248.67 156416 19.18%
Out-of-Cache-Read 122599 149164 21.67%
Out-of-Cache-Reread 121197 148777.33 22.76%
Qcow2-nfs qcow2 cache=none elevator=dealine
Type Rhel6.0-virtio Rhel6.1-virtio Improvement%
Dio-Write 43287 55643.33 28.55%
Dio-Rewrite 62998.67 60435 -4.07%
Dio-Read 58227.67 57521.67 -1.21%
Dio-Reread 58375 57936.33 -0.75%
Incache-Write 105898 133944.67 26.48%
Incache-ReWrite 131408 93042 -29.20%
Incache-Read 194638.33 956375.67 391.36%
Incache-Reread 577811.67 810256.33 40.23%
Out-of-Cache-Write 90921.67 100638 10.69%
Out-of-Cache-ReWrite 93297.33 76711.67 -17.78%
Out-of-Cache-Read 53543 58324.33 8.93%
Out-of-Cache-Reread 64981.33 83918 29.14%
From results,we could see qcow2 has been gotten highly improvements from dio-wirte,incache-write ,incache-Read,Out-of-Cache-Write Out-of-Cache-Reread secnarios.
So it's pass.~~
According comment #7 ,change the bus status to verified.thanks~~ An advisory has been issued which should help the problem described in this bug report. This report is therefore being closed with a resolution of ERRATA. For more information on therefore solution and/or where to find the updated files, please follow the link below. You may reopen this bug report if the solution does not work for you. http://rhn.redhat.com/errata/RHSA-2011-0534.html An advisory has been issued which should help the problem described in this bug report. This report is therefore being closed with a resolution of ERRATA. For more information on therefore solution and/or where to find the updated files, please follow the link below. You may reopen this bug report if the solution does not work for you. http://rhn.redhat.com/errata/RHSA-2011-0534.html |