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Re: [Xen-devel] Ticket spinlocks and MP guests

To: "Tian, Kevin" <kevin.tian@xxxxxxxxx>, Espen Skoglund <espen.skoglund@xxxxxxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx>
Subject: Re: [Xen-devel] Ticket spinlocks and MP guests
From: Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>
Date: Fri, 15 Feb 2008 08:22:50 +0000
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On 15/2/08 01:03, "Tian, Kevin" <kevin.tian@xxxxxxxxx> wrote:

>> I suppose it depends whether there are any hot spinlocks in
>> the kernel these
>> days. I know things have improved a lot in recent years with
>> things like
>> RCU. Most spinlock regions are now pretty short.
> The side effect is to enlarge average critical section length, if
> most spinlock regions are pretty short.

Side effect of ticket-based locks, or pv'ed sleeping locks?

 -- Keir

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