Bug 624481 - simulate the MSIx table read op to improve scalability
Summary: simulate the MSIx table read op to improve scalability
Keywords:
Status: CLOSED WONTFIX
Alias: None
Product: Red Hat Enterprise Linux 5
Classification: Red Hat
Component: kernel-xen
Version: 5.5
Hardware: All
OS: Linux
low
medium
Target Milestone: rc
: ---
Assignee: Xen Maintainance List
QA Contact: Red Hat Kernel QE team
URL:
Whiteboard:
Depends On:
Blocks: 514490 KernelXenUpstreamHV
TreeView+ depends on / blocked
 
Reported: 2010-08-16 15:19 UTC by Andrew Jones
Modified: 2011-05-30 09:34 UTC (History)
5 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2011-05-30 07:56:31 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)

Description Andrew Jones 2010-08-16 15:19:46 UTC 
Backport Xen upstream changeset 21912

This patch simulates the MSIx table read operation to avoid read traffic caused by guest Linux kernel in a multiple guests environments running with high interrupt rate workload.(We tested 24 guests with iperf by 10Gb workload).
Comment 1 Andrew Jones 2010-08-16 15:40:30 UTC 
Looks like a fairly simple backport, but not 100% trivial. Since it's a perf
enhancement and not a fix, I'll flip the flag to 5.7 (it's getting too late for
5.6).

Drew
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