From: bugzilla-daemon@bugzilla.kernel.org
To: kvm@vger.kernel.org
Subject: [Bug 118191] performance regression since dynamic halt-polling
Date: Fri, 13 May 2016 07:54:18 +0000 [thread overview]
Message-ID: <bug-118191-28872-odWpDIOrlM@https.bugzilla.kernel.org/> (raw)
In-Reply-To: <bug-118191-28872@https.bugzilla.kernel.org/>
https://bugzilla.kernel.org/show_bug.cgi?id=118191
Wanpeng Li <wanpeng.li@hotmail.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |wanpeng.li@hotmail.com
--- Comment #1 from Wanpeng Li <wanpeng.li@hotmail.com> ---
Behavior before the commit: ~60% cpu usage
After the commit: 100% cpu
===============================================
I think this is the right phenomena which you will observe, it doesn't
influence scheduling on host, the poll will stop immediately once another
candidate task appears.
usage and much lower network throughput.
==============================================
There is a trace off between throughput and latency, you can stop dynamic
halt-polling by the interfaces which you have already found for throughput
oriented workloads.
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next prev parent reply other threads:[~2016-05-13 7:54 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-05-13 7:03 [Bug 118191] New: performance regression since dynamic halt-polling bugzilla-daemon
2016-05-13 7:54 ` bugzilla-daemon [this message]
2016-05-13 8:08 ` [Bug 118191] " bugzilla-daemon
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