From mboxrd@z Thu Jan  1 00:00:00 1970
From: Xin Xu <jungle.xuxin@gmail.com>
Subject: pin hypervisor to physical cpu
Date: Thu, 14 Jun 2012 16:58:33 -0400
Message-ID: <CA+ANA0HStvsP=6=39h2qDP_gQ7vXRNSSa8PPwAO8ac89Ku8ypg@mail.gmail.com>
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Hi everyone,

I am trying to identify the current running task is belonging to domu, dom0
or hypervisor. So I figured if I can separate domu, dom0 and hypervisor to
different physical CPUs, then I can just look at cpu and then tell the task
belongs to which. I use xm vcpu-pin to pin domu and dom0, but it does not
work for hypervisor. I am just wondering if there is a way to pin
hypervisor to a specific cpu?

I am just trying to better understand how this "pinning" cpu works. If I
pin domu to cpu 0, does that mean all instructions belongs to domu will run
in cpu 0? Does that mean cpu 0 will be exclusively assigned to domu and
will not run any instructions from dom0 and hypervisor? I pin dom0 to cpu
0, and dom1 to cpu1, but i still see instructions running in cpu 2 and 3.
How can I tell what are those instructions in cpu 2 and 3?

Thank you

Xin Xu

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<div>Hi everyone,<br></div><div><br></div><div>I am trying to identify the =
current running task is belonging to domu, dom0 or hypervisor. So I figured=
 if I can separate domu, dom0 and hypervisor to different physical CPUs, th=
en I can just look at cpu and then tell the task belongs to which. I use xm=
 vcpu-pin to pin domu and dom0, but it does not work for hypervisor. I am j=
ust wondering if there is a way to pin hypervisor to a specific cpu?</div>
<div><br></div><div>I am just trying to better understand how this &quot;pi=
nning&quot; cpu works. If I pin domu to cpu 0, does that mean all instructi=
ons belongs to domu will run in cpu 0? Does that mean cpu 0 will be exclusi=
vely assigned to domu and will not run any instructions from dom0 and hyper=
visor? I pin dom0 to cpu 0, and dom1 to cpu1, but i still see instructions =
running in cpu 2 and 3. How can I tell what are those instructions in cpu 2=
 and 3?<br>
</div><div><br></div><div>Thank you</div><div><br></div><div>Xin Xu</div>

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