From: "Chris Friesen" <cfriesen@nortel.com>
To: balbir@linux.vnet.ibm.com
Cc: Avi Kivity <avi@redhat.com>,
bharata@linux.vnet.ibm.com, linux-kernel@vger.kernel.org,
Dhaval Giani <dhaval@linux.vnet.ibm.com>,
Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com>,
Gautham R Shenoy <ego@in.ibm.com>,
Srivatsa Vaddagiri <vatsa@in.ibm.com>,
Ingo Molnar <mingo@elte.hu>,
Peter Zijlstra <a.p.zijlstra@chello.nl>,
Pavel Emelyanov <xemul@openvz.org>,
kvm@vger.kernel.org,
Linux Containers <containers@lists.linux-foundation.org>,
Herbert Poetzl <herbert@13thfloor.at>
Subject: Re: [RFC] CPU hard limits
Date: Thu, 04 Jun 2009 23:09:22 -0600 [thread overview]
Message-ID: <4A28A882.8070503@nortel.com> (raw)
In-Reply-To: <20090605044946.GA11755@balbir.in.ibm.com>
Balbir Singh wrote:
> But then there is no other way to make a *guarantee*, guarantees come
> at a cost of idling resources, no? Can you show me any other
> combination that will provide the guarantee and without idling the
> system for the specified guarantees?
The example given was two 10% guaranteed groups and one best-effort
group. Why would this require idling resources?
If I have a hog in each group, the requirements would be met if the
groups got 33, 33, and 33. (Or 10/10/80, for that matter.) If the
second and third groups go idle, why not let the first group use 100% of
the cpu?
The only hard restriction is that the sum of the guarantees must be less
than 100%.
Chris
next prev parent reply other threads:[~2009-06-05 5:09 UTC|newest]
Thread overview: 54+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-06-04 5:36 [RFC] CPU hard limits Bharata B Rao
2009-06-04 12:19 ` Avi Kivity
2009-06-04 21:32 ` Mike Waychison
2009-06-05 3:03 ` Bharata B Rao
2009-06-05 3:33 ` Avi Kivity
2009-06-05 4:37 ` Balbir Singh
2009-06-05 4:44 ` Avi Kivity
2009-06-05 4:49 ` Balbir Singh
2009-06-05 5:09 ` Chris Friesen [this message]
2009-06-05 5:13 ` Balbir Singh
2009-06-05 5:10 ` Balbir Singh
2009-06-05 5:21 ` Avi Kivity
2009-06-05 5:27 ` Balbir Singh
2009-06-05 5:31 ` Bharata B Rao
2009-06-05 6:01 ` Avi Kivity
2009-06-05 8:16 ` Bharata B Rao
2009-06-07 6:04 ` Avi Kivity
2009-06-07 16:14 ` Bharata B Rao
2009-06-05 9:39 ` Balbir Singh
2009-06-05 13:14 ` Avi Kivity
2009-06-05 13:42 ` Balbir Singh
2009-06-07 6:09 ` Avi Kivity
2009-06-05 14:54 ` Chris Friesen
2009-06-07 6:10 ` Avi Kivity
2009-06-05 9:24 ` Balbir Singh
2009-06-05 6:03 ` Avi Kivity
2009-06-05 6:32 ` Bharata B Rao
2009-06-05 12:57 ` Avi Kivity
2009-06-05 5:16 ` Avi Kivity
2009-06-05 5:20 ` Balbir Singh
2009-06-05 3:07 ` Balbir Singh
2009-06-05 8:53 ` Paul Menage
2009-06-05 9:27 ` Bharata B Rao
2009-06-05 9:32 ` Paul Menage
2009-06-05 9:48 ` Dhaval Giani
2009-06-05 9:51 ` Paul Menage
2009-06-05 9:59 ` Dhaval Giani
2009-06-05 10:03 ` Paul Menage
2009-06-08 8:50 ` Pavel Emelyanov
2009-06-05 9:36 ` Balbir Singh
2009-06-05 9:48 ` Paul Menage
2009-06-05 9:55 ` Balbir Singh
2009-06-05 9:57 ` Paul Menage
2009-06-05 10:02 ` Paul Menage
2009-06-05 11:32 ` Srivatsa Vaddagiri
2009-06-05 12:18 ` Paul Menage
2009-06-07 10:11 ` Srivatsa Vaddagiri
2009-06-07 15:35 ` Balbir Singh
2009-06-08 4:37 ` Srivatsa Vaddagiri
2009-06-05 14:44 ` Chris Friesen
2009-06-05 13:02 ` Avi Kivity
2009-06-05 13:43 ` Dhaval Giani
2009-06-05 14:45 ` Chris Friesen
2009-06-05 9:02 ` Reinhard Tartler
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