From: Avi Kivity <avi@redhat.com>
To: Glauber Costa <glommer@redhat.com>
Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org,
Rik van Riel <riel@redhat.com>,
Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>,
Peter Zijlstra <peterz@infradead.org>,
Anthony Liguori <aliguori@us.ibm.com>,
Eric B Munson <emunson@mgebm.net>
Subject: Re: [PATCH v2 6/7] KVM-GST: adjust scheduler cpu power
Date: Sun, 19 Jun 2011 13:05:45 +0300 [thread overview]
Message-ID: <4DFDC9F9.5020300@redhat.com> (raw)
In-Reply-To: <1308262856-5779-7-git-send-email-glommer@redhat.com>
On 06/17/2011 01:20 AM, Glauber Costa wrote:
> This is a first proposal for using steal time information
> to influence the scheduler. There are a lot of optimizations
> and fine grained adjustments to be done, but it is working reasonably
> so far for me (mostly)
>
> With this patch (and some host pinnings to demonstrate the situation),
> two vcpus with very different steal time (Say 80 % vs 1 %) will not get
> an even distribution of processes. This is a situation that can naturally
> arise, specially in overcommited scenarios. Previosly, the guest scheduler
> would wrongly think that all cpus have the same ability to run processes,
> lowering the overall throughput.
>
Looks fine, but sched maintainer review needed.
--
error compiling committee.c: too many arguments to function
next prev parent reply other threads:[~2011-06-19 10:05 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-06-16 22:20 [PATCH v2 0/7] Steal time for KVM Glauber Costa
2011-06-16 22:20 ` [PATCH v2 1/7] KVM-HDR Add constant to represent KVM MSRs enabled bit Glauber Costa
2011-06-17 0:47 ` Eric B Munson
2011-06-16 22:20 ` [PATCH v2 2/7] KVM-HDR: KVM Steal time implementation Glauber Costa
2011-06-17 0:48 ` Eric B Munson
2011-06-19 9:49 ` Avi Kivity
2011-06-20 2:55 ` Glauber Costa
2011-06-16 22:20 ` [PATCH v2 3/7] KVM-HV: " Glauber Costa
2011-06-17 0:48 ` Eric B Munson
2011-06-19 9:57 ` Avi Kivity
2011-06-20 2:53 ` Glauber Costa
2011-06-20 6:02 ` Avi Kivity
2011-06-20 20:56 ` Marcelo Tosatti
2011-06-28 12:30 ` Glauber Costa
2011-06-28 18:02 ` Marcelo Tosatti
2011-06-16 22:20 ` [PATCH v2 4/7] KVM-GST: Add a pv_ops stub for steal time Glauber Costa
2011-06-17 0:48 ` Eric B Munson
2011-06-16 22:20 ` [PATCH v2 5/7] KVM-GST: KVM Steal time accounting Glauber Costa
2011-06-17 0:48 ` Eric B Munson
2011-06-19 10:04 ` Avi Kivity
2011-06-20 2:38 ` Glauber Costa
2011-06-20 6:07 ` Avi Kivity
2011-06-16 22:20 ` [PATCH v2 6/7] KVM-GST: adjust scheduler cpu power Glauber Costa
2011-06-17 0:49 ` Eric B Munson
2011-06-19 10:05 ` Avi Kivity [this message]
2011-06-16 22:20 ` [PATCH v2 7/7] KVM-GST: KVM Steal time registration Glauber Costa
2011-06-17 0:49 ` Eric B Munson
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