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From: "Zhiyuan Shao" <zyshao.maillist@gmail.com>
To: p z <zpengxen@gmail.com>,
	"xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>
Subject: Re: Question about the current vcpu.
Date: Mon, 30 Mar 2009 16:22:28 +0800	[thread overview]
Message-ID: <200903301622260001827@gmail.com> (raw)
In-Reply-To: fce3faea0903271837s5efea0bao2dd2be93142e0ae@mail.gmail.com


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Hi,

Actually, defined by Credit scheduler, each PCPU (physical CPU, if you run Xen on a multi-core machine, you get multiple PCPUs) has its own runqueue, and its own current vcpu as well.
The PCPUs of the system makes their own scheduling decisions independently. 

Best,


2009-03-30 



Zhiyuan Shao 



发件人： p z 
发送时间： 2009-03-28  09:38:16 
收件人： xen-devel@lists.xensource.com 
抄送： 
主题： [Xen-devel] Question about the current vcpu. 
 
Hi all,

 There is a macro current which may mean to get the current vcpu information.

 But  the physical machine may be multi-core ,thus there may be two or more vcpus running  in parallel on different cores.Then which vcpu is the current? How should  I understand the current vcpu please? 
  
 Thanks.


Cheer,
-- 
zp

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      parent reply	other threads:[~2009-03-30  8:22 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-03-28  1:37 Question about the current vcpu p z
2009-03-28  5:16 ` Jeremy Fitzhardinge
2009-03-30  8:22 ` Zhiyuan Shao [this message]

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