From: Keir Fraser <keir@xen.org>
To: George Dunlap <George.Dunlap@eu.citrix.com>,
Jan Beulich <JBeulich@suse.com>
Cc: "xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>
Subject: Re: credit2 data structures
Date: Thu, 13 Oct 2011 11:57:59 +0100 [thread overview]
Message-ID: <CABC82C7.329CD%keir@xen.org> (raw)
In-Reply-To: <CAFLBxZaHwav97=PVvZDTKzBVaeGc9FYh4xs9mj3cC=WbEzTZtw@mail.gmail.com>
On 13/10/2011 11:11, "George Dunlap" <George.Dunlap@eu.citrix.com> wrote:
> For one thing, the number of runqueues in credit2 is actually meant to
> be smaller than the number of logical cpus -- it's meant to be one per
> L2 cache, which should have between 2 and 8 logical cpus, depending on
> the architecture. I just put NR_CPUS because it was easier to get
> working. Making that an array of pointers, which is allocated on an
> as-needed basis, should reduce that requirement a great deal.
That would suffice. If we can put per-cpu stuff in the per_cpu() data area
then even better. The fact that credit2 burns a couple of kB per CPU isn't a
problem at all, as long as it does it only for active CPUs.
-- Keir
next prev parent reply other threads:[~2011-10-13 10:57 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-10-13 9:42 credit2 data structures Jan Beulich
2011-10-13 10:11 ` George Dunlap
2011-10-13 10:57 ` Keir Fraser [this message]
2011-10-13 12:17 ` Jan Beulich
2011-10-13 12:24 ` Jan Beulich
2011-10-13 12:54 ` Juergen Gross
2011-10-13 14:17 ` Jan Beulich
2011-10-14 4:35 ` Juergen Gross
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