From: Jeremy Fitzhardinge <jeremy@goop.org>
To: Priya <pbhat@acis.ufl.edu>
Cc: "xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>,
Keir Fraser <keir.fraser@eu.citrix.com>
Subject: Re: Xen timing mode
Date: Tue, 23 Feb 2010 12:28:26 -0800 [thread overview]
Message-ID: <4B843A6A.5050102@goop.org> (raw)
In-Reply-To: <5c3550fe1002230929r37d1bd73mdd82fc84ee51d0fd@mail.gmail.com>
On 02/23/2010 09:29 AM, Priya wrote:
> The Xen Interface manual for Xen v2.0 (attached) Page 4 defines Domain
> - virtual time as
>
> " The time that progresses at the same pace as system time, but only
> while a domain is executing -- it stops while a domain is
> de-scheduled. Therefore the share of the CPU that a domain receives is
> indicated by the rate at which its virtual time increases."
>
> I am interesting in finding out if any of the timing system
> calls/instructions like gettimeofday(), hwclock(), rdtsc() can read
> this domain virtual time.
/proc/stat publishes stolen time for each vcpu (second-last column on
the "cpuX" lines); you can subtract that from monotonic time to work out
how much vcpu the domain has got.
J
next prev parent reply other threads:[~2010-02-23 20:28 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-02-23 16:50 Xen timing mode PBhat
2010-02-23 17:08 ` Keir Fraser
2010-02-23 17:12 ` Priya
2010-02-23 17:18 ` Keir Fraser
2010-02-23 17:29 ` Priya
2010-02-23 17:33 ` Priya
2010-02-23 20:28 ` Jeremy Fitzhardinge [this message]
2010-02-23 20:49 ` Priya
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=4B843A6A.5050102@goop.org \
--to=jeremy@goop.org \
--cc=keir.fraser@eu.citrix.com \
--cc=pbhat@acis.ufl.edu \
--cc=xen-devel@lists.xensource.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.