Re: [Xen-users] How to read clocksource xen as a [root] user?

[Ian Campbell <ian.campbell@xxxxxxxxxx>]

On Thu, 2015-08-06 at 19:09 +0000, Patrick Schleizer wrote:
> Hi!
> 
> Is it possible to read clocksource xen using some user space tool?

I don't believe so. While the TSC can be (configurably?) made available to
userspace the scaling factors etc exposed from Xen to the guest kernel are
not AFAIK.

At one point (several years ago) there was talk of putting those into the
VDSO so userspace could use them, but I don't think that ever happened.

> Or would one have to write a C program or use a memory debugger so
> something of that sort?

Or a kernel driver perhaps.

The real question is why you want to do this though.

Ian.


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