From: Michael Wolf <mjw@linux.vnet.ibm.com>
To: Glauber Costa <glommer@parallels.com>
Cc: linux-kernel@vger.kernel.org, riel@redhat.com, gleb@redhat.com,
kvm@vger.kernel.org, peterz@infradead.org, mtosatti@redhat.com,
mingo@redhat.com, anthony@codemonkey.ws
Subject: Re: [PATCH 4/4] Add a timer to allow the separation of consigned from steal time.
Date: Wed, 06 Feb 2013 12:07:38 -0600 [thread overview]
Message-ID: <51129BEA.6090302@linux.vnet.ibm.com> (raw)
In-Reply-To: <51126A84.5050005@parallels.com>
On 02/06/2013 08:36 AM, Glauber Costa wrote:
> On 02/06/2013 01:49 AM, Michael Wolf wrote:
>> Add a helper routine to scheduler/core.c to allow the kvm module
>> to retrieve the cpu hardlimit settings. The values will be used
>> to set up a timer that is used to separate the consigned from the
>> steal time.
> Sorry: What is the business of a timer in here?
> Whenever we read steal time, we know how much time has passed and with
> that information we can know the entitlement for the period. This breaks
> if we suspend, but we know that we suspended, so this is not a problem.
I may be missing something, but how do we know how much time has
passed? That is why
I had the timer in there. I will go look again at the code but I
thought the data was collected
as ticks and passed at random times. The ticks are also accumulating so
we are looking at the
difference in the count between reads.....
>
> Everything bigger the entitlement is steal time.
I agree provided I know the amount of total time that the steal time was
accumulated.
>
>
> --
> To unsubscribe from this list: send the line "unsubscribe kvm" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at http://vger.kernel.org/majordomo-info.html
>
next prev parent reply other threads:[~2013-02-06 18:07 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-02-05 21:49 [PATCH 0/4] Alter steal-time reporting in the guest Michael Wolf
2013-02-05 21:49 ` [PATCH 1/4] Alter the amount of steal time reported by " Michael Wolf
2013-02-05 21:49 ` [PATCH 2/4] Expand the steal time msr to also contain the consigned time Michael Wolf
2013-02-06 21:14 ` Rik van Riel
2013-02-07 14:25 ` Michael Wolf
2013-02-05 21:49 ` [PATCH 3/4] Add the code to send the consigned time from the host to the guest Michael Wolf
2013-02-06 21:18 ` Rik van Riel
2013-02-07 14:26 ` Michael Wolf
2013-02-05 21:49 ` [PATCH 4/4] Add a timer to allow the separation of consigned from steal time Michael Wolf
2013-02-06 14:36 ` Glauber Costa
2013-02-06 18:07 ` Michael Wolf [this message]
2013-02-07 8:46 ` Glauber Costa
2013-02-07 14:27 ` Michael Wolf
2013-02-18 23:57 ` Marcelo Tosatti
2013-03-05 20:17 ` Michael Wolf
2013-03-06 1:35 ` Marcelo Tosatti
2013-02-18 16:43 ` [PATCH 0/4] Alter steal-time reporting in the guest Frederic Weisbecker
2013-02-19 1:11 ` Marcelo Tosatti
2013-03-05 20:22 ` Michael Wolf
2013-03-06 1:41 ` Marcelo Tosatti
2013-03-06 8:13 ` Glauber Costa
2013-03-06 16:29 ` Michael Wolf
2013-03-07 0:52 ` Marcelo Tosatti
2013-03-07 3:11 ` Paul Mackerras
2013-03-07 20:23 ` Michael Wolf
2013-03-06 16:27 ` Michael Wolf
2013-03-07 2:30 ` Marcelo Tosatti
2013-03-07 21:09 ` Michael Wolf
2013-03-07 21:15 ` Michael Wolf
2013-03-07 21:25 ` Marcelo Tosatti
2013-03-07 22:34 ` Michael Wolf
2013-03-08 1:54 ` Marcelo Tosatti
2013-03-08 2:21 ` Marcelo Tosatti
2013-03-06 13:34 ` Frederic Weisbecker
2013-03-06 16:23 ` Michael Wolf
2013-03-06 13:20 ` Frederic Weisbecker
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=51129BEA.6090302@linux.vnet.ibm.com \
--to=mjw@linux.vnet.ibm.com \
--cc=anthony@codemonkey.ws \
--cc=gleb@redhat.com \
--cc=glommer@parallels.com \
--cc=kvm@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@redhat.com \
--cc=mtosatti@redhat.com \
--cc=peterz@infradead.org \
--cc=riel@redhat.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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).