Bug 1006742
Summary: | Poor performance using kvm with fully virtualized network (e1000). | ||
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Product: | [Fedora] Fedora | Reporter: | Jan ONDREJ <ondrejj> |
Component: | kernel | Assignee: | Kernel Maintainer List <kernel-maint> |
Status: | CLOSED CURRENTRELEASE | QA Contact: | Fedora Extras Quality Assurance <extras-qa> |
Severity: | unspecified | Docs Contact: | |
Priority: | unspecified | ||
Version: | 19 | CC: | amit.shah, gansalmon, itamar, jonathan, kernel-maint, madhu.chinakonda, marcelo.barbosa, michele, ondrejj, skottler |
Target Milestone: | --- | ||
Target Release: | --- | ||
Hardware: | x86_64 | ||
OS: | Linux | ||
Whiteboard: | |||
Fixed In Version: | Doc Type: | Bug Fix | |
Doc Text: | Story Points: | --- | |
Clone Of: | Environment: | ||
Last Closed: | 2013-09-19 05:50:59 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: | |
Embargoed: |
Description
Jan ONDREJ
2013-09-11 08:39:58 UTC
Hi Jan, so just in order to get a very clear picture: A) Host kernel with kernel-3.9.5-301.fc19.x86_64 and guest with fully emulated e1000 network card gives you a ~30MB/s B) Exact same host but with kernel-3.10.x and with the exact same guest with e1000 network card gives you ~10MB/s Is my understanding correct? So no other changes on the host except the kernel and the guest is always the same, right? What kernel/fedora version does the guest use? Thanks, Michele Here are some tests. There is host kernel version and still same guest network configuration: host 3.9.5-301.fc19.x86_64, guest: <model type='e1000'/> 100%[======================>] 4,519,362,560 58.8M/s in 74s 2013-09-12 07:51:16 (58.2 MB/s) - `/dev/null' saved [4519362560] host 3.9.5-301.fc19.x86_64, guest: <model type='virtio'/> 100%[======================>] 4,519,362,560 59.6M/s in 72s 2013-09-12 07:54:12 (60.1 MB/s) - `/dev/null' saved [4519362560] ---- host 3.10.9-100.fc18.x86_64, guest: <model type='virtio'/> 100%[======================>] 4,519,362,560 60.5M/s in 71s 2013-09-12 09:48:07 (60.6 MB/s) - `/dev/null' saved [4519362560] host 3.10.9-100.fc18.x86_64, guest: <model type='e1000'/> 0% [ ] 1,664,856 139K/s eta 21h 43m ---- host 3.10.10-200.fc19.x86_64, guest: <model type='virtio'/> 100%[======================>] 4,519,362,560 60.2M/s in 73s 2013-09-12 10:59:20 (58.8 MB/s) - `/dev/null' saved [4519362560] host 3.10.10-200.fc19.x86_64, guest: <model type='e1000'/> 0% [ ] 674,424 64.6K/s eta 23h 17m ---- host 3.10.10-200.fc19.x86_64, host speed for comparison 100%[======================>] 4,519,362,560 61.1MB/s in 70s 2013-09-12 08:24:39 (61.2 MB/s) - '/dev/null' saved [4519362560] Guest version: Linux vpn-server 3.6.11-4.fc16.x86_64 #1 SMP Tue Jan 8 20:57:42 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux This is one of my old testing guests, but same problem with newer guests too. And also same problem for windows guests. Testing command: wget -O /dev/null \ ftp://158.197.16.70/pub/fedora/linux/releases/19/Fedora/i386/iso/Fedora-19-i386 *********** MASS BUG UPDATE ************** We apologize for the inconvenience. There is a large number of bugs to go through and several of them have gone stale. Due to this, we are doing a mass bug update across all of the Fedora 19 kernel bugs. Fedora 19 has now been rebased to 3.11.1-200.fc19. Please test this kernel update and let us know if you issue has been resolved or if it is still present with the newer kernel. If you experience different issues, please open a new bug report for those. Unable to reproduce with kernel 3.11.1-200.fc19.x86_64. Looks like it's fixed. Closing bug. Reopen if you consider to fix this for Fedora 18. I can't test on Fedora 18. Thank you for fix. |