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Bug 593158 - virtio net/vhost net speed enhancements from upstream kernel
Summary: virtio net/vhost net speed enhancements from upstream kernel
Keywords:
Status: CLOSED CURRENTRELEASE
Alias: None
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: kernel
Version: 6.0
Hardware: All
OS: Linux
low
medium
Target Milestone: rc
: ---
Assignee: Michael S. Tsirkin
QA Contact: Virtualization Bugs
URL:
Whiteboard:
Depends On:
Blocks: 533943 595287
TreeView+ depends on / blocked
 
Reported: 2010-05-18 01:49 UTC by Michael S. Tsirkin
Modified: 2013-01-09 22:35 UTC (History)
5 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
: 595287 (view as bug list)
Environment:
Last Closed: 2010-11-11 16:14:13 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)

Description Michael S. Tsirkin 2010-05-18 01:49:53 UTC 
we should backport virtio net speed enhancements from Rusty's tree,
most notably publish used index patch.

These gives up to 30% bandwidth improvement in some workloads.
Comment 1 RHEL Program Management 2010-05-18 02:05:37 UTC 
This request was evaluated by Red Hat Product Management for inclusion in a Red
Hat Enterprise Linux major release.  Product Management has requested further
review of this request by Red Hat Engineering, for potential inclusion in a Red
Hat Enterprise Linux Major release.  This request is not yet committed for
inclusion.
Comment 4 Aristeu Rozanski 2010-05-25 17:42:32 UTC 
Patch(es) available on kernel-2.6.32-29.el6
Comment 7 Quan Wenli 2010-08-19 05:10:08 UTC 
Through compare the Kernel-2.6.32-27.el6 & Kernel-2.6.32-63.el6, virtio-net /vhost speed enhancement +3~76% when from guest to external.There is no significant improvement when from external to guest.
 
virtio 	Kernel-2.6.32-27.el6	Kernel-2.6.32-63.el6	diff% 
64	345.08	                 528.68                53.21%
128	451.89	                 560.28	               23.99%
256	694.77	                 687.65	               -1.02%
512	645.26	                 941.16	               45.86%
1024	728.93	                 941.17	               29.12%
2048	846.78	                 941.02	               11.13%
4096	885.62	                 941.17	               6.27%
8192	731.04	                 941.2	               28.75%
16824	815.31	                 941.17	               15.44%
			
			
vhost	Kernel-2.6.32-27.el6	Kernel-2.6.32-63.el6	diff% 	
64	404.36	                 715.01	               76.83%
128	566.54	                 941.32	               66.15%
256	722.13	                 940.63	               30.26%
512	846.3	                 941.32	               11.23%
1024	854.87	                 941.31	               10.11%
2048	911.88	                 941.33                3.23%
4096	854.3	                 941.34	               10.19%
8192	869.58	                 941.34	               8.25%
16824	814.87	                 940.81	               15.46%

So it can be closed.
Comment 8 releng-rhel@redhat.com 2010-11-11 16:14:13 UTC 
Red Hat Enterprise Linux 6.0 is now available and should resolve
the problem described in this bug report. This report is therefore being closed
with a resolution of CURRENTRELEASE. You may reopen this bug report if the
solution does not work for you.
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