From mboxrd@z Thu Jan  1 00:00:00 1970
From: Vasiliy G Tolstov <v.tolstov@selfip.ru>
Subject: Re: [Patch][resend] implementation of cpupool support
	in xl
Date: Thu, 16 Sep 2010 17:02:42 +0400
Message-ID: <1284642162.4860.19.camel@vase.work>
References: <4C907510.3070904@ts.fujitsu.com>
	<1284616684.4860.16.camel@vase.work> <4C921517.9070605@ts.fujitsu.com>
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To: Juergen Gross <juergen.gross@ts.fujitsu.com>
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=D0=92 =D0=A7=D1=82=D0=B2, 16/09/2010 =D0=B2 15:01 +0200, Juergen Gross =D0=
=BF=D0=B8=D1=88=D0=B5=D1=82:
> On 09/16/10 07:58, Vasiliy G Tolstov wrote:
> > Sorry for may be breaking thread, but what benefits of using cpu pool=
 in
> > Xen? Can You provide some use cases for using cpu pools?
>=20
> Without cpu pools the whole Xen server is running one scheduler which i=
s
> scheduling all domains on all cpus (possibly with some restrictions due=
 to
> cpu pinning). With cpu pools each pool is running it's own scheduler
> responsible only for some cpus and some domains. This may be important =
if
> you want to:
> - isolate some domains from others regarding cpu usage
> - restrict a group of domains to a subset of cpus (e.g. due to license
>    restrictions), while scheduling parameters should still be working (=
this was
>    our main problem without cpu pools: scheduling weights and cpu pinni=
ng are
>    not working together very well)
> - use different scheduling strategies for different domains (e.g. credi=
t
>    scheduler for some domains and credit2 or sedf for others)
>=20
> For an extended discussion on cpu pools please see:
> http://lists.xensource.com/archives/html/xen-devel/2009-07/msg01116.htm=
l
>=20
>=20
> HTH Juergen
>=20

Thank you very much!

--=20
Vasiliy G Tolstov <v.tolstov@selfip.ru>
Selfip.Ru