Bug 514241

Summary: Evaluate the need for qemu's virtio_net TX mitigation timer
Product: [Fedora] Fedora Reporter: Mark McLoughlin <markmc>
Component: qemuAssignee: Justin M. Forbes <jforbes>
Status: CLOSED WONTFIX QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: medium Docs Contact:
Priority: high    
Version: rawhideCC: berrange, dwmw2, gcosta, herbert.xu, itamar, jaswinder, knoel, markmc, mst, mwagner, tburke, virt-maint
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Hardware: All   
OS: Linux   
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Fixed In Version: Doc Type: Bug Fix
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Last Closed: 2010-03-10 12:13:39 UTC Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Bug Blocks: 498969    
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Description Flags
qemu-kvm-remove-virtio-net-tx-timer.patch none

Description Mark McLoughlin 2009-07-28 14:37:23 UTC 
See bug #504647 where we removed the virtio_net TX mitigation timer for RHEL5.4

We need to re-do that benchmarking on a 2.6.31 kernel in order to evaluate whether removing would benefit Fedora 12

One major difference is that more recent kernels have higher resolution timers, so the timer would be 150us instead of 1ms
Comment 1 Mark McLoughlin 2009-08-12 17:01:09 UTC 
Created attachment 357206 [details]
qemu-kvm-remove-virtio-net-tx-timer.patch

Here's a version of the RHEL5 patch which applies to Fedora 12
Comment 2 Fedora Admin XMLRPC Client 2010-03-09 16:54:10 UTC 
This package has changed ownership in the Fedora Package Database.  Reassigning to the new owner of this component.
Comment 3 Fedora Admin XMLRPC Client 2010-03-09 17:19:56 UTC 
This package has changed ownership in the Fedora Package Database.  Reassigning to the new owner of this component.
Comment 4 Dor Laor 2010-03-10 12:13:39 UTC 
I think we can close it since our default should be vhost and it's not relevant there