From: Keir Fraser <keir.xen@gmail.com>
To: veerasena reddy <veeruyours@gmail.com>, xen-devel@lists.xensource.com
Subject: Re: Are there any tools to calculate the cost of a VM exit
Date: Tue, 07 Jun 2011 08:04:43 +0100 [thread overview]
Message-ID: <CA138C1B.1BAFC%keir.xen@gmail.com> (raw)
In-Reply-To: <BANLkTi=z8uDqLYGsE-oKVD181hGm6OALxw@mail.gmail.com>
On 07/06/2011 07:33, "veerasena reddy" <veeruyours@gmail.com> wrote:
> Hi,
>
> I am looking to add a new hypercall to XEN-3.4.3 and invoke this new hypercall
> very often (may be 50 to 500 thousands of times a sec) from a HVM guest.
> I would like to see the cost of this to tradeoff with performance.
>
> Could you please advice if there are tools for this or any other method that i
> can use?
In the HVM guest:
gettimeofday() (or RDTSC, or any other handy timestamp)
<call hypercall in a tight loop 10,000,000 times>
gettimeofday() (or equiv, as above)
-- Keir
> Thanks in advance.
>
> Regards,
> VSR.
>
>
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@lists.xensource.com
> http://lists.xensource.com/xen-devel
prev parent reply other threads:[~2011-06-07 7:04 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-06-07 6:33 Are there any tools to calculate the cost of a VM exit veerasena reddy
2011-06-07 7:04 ` Keir Fraser [this message]
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