From: Jeremy Fitzhardinge <jeremy-TSDbQ3PG+2Y@public.gmane.org>
To: Anthony Liguori <anthony-rdkfGonbjUSkNkDKm+mE6A@public.gmane.org>
Cc: kvm-devel
<kvm-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org>,
virtualization
<virtualization-qjLDD68F18O7TbgM5vRIOg@public.gmane.org>
Subject: Re: [PATCH 5/5] KVM: paravirt time source
Date: Tue, 19 Jun 2007 14:26:38 -0700 [thread overview]
Message-ID: <46784A0E.3080502@goop.org> (raw)
In-Reply-To: <46783EDB.5010808-rdkfGonbjUSkNkDKm+mE6A@public.gmane.org>
Anthony Liguori wrote:
> I've updated this patch and switched to using a scale/shift like Xen
> is doing, but I must admit, I don't understand how it helps adjtime.
> I poked around a bit and it wasn't obvious.
>
> Why is having {mult=1<<22, shift=22} better for adjtime than {mult=1,
> shift=0}?
I don't fully understand it myself, but I think its because adjtime
plays with the mult factor to scale the rate at which time passes. If
the scale is 1, then it can only scale time by integer amounts. By
setting it to 2^22, then it can adjust time down to 1 part in 4 million.
J
-------------------------------------------------------------------------
This SF.net email is sponsored by DB2 Express
Download DB2 Express C - the FREE version of DB2 express and take
control of your XML. No limits. Just data. Click to get it now.
http://sourceforge.net/powerbar/db2/
next prev parent reply other threads:[~2007-06-19 21:26 UTC|newest]
Thread overview: 85+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-06-18 2:56 [PATCH 0/5] KVM paravirt_ops implementation Anthony Liguori
[not found] ` <4675F462.1010708-rdkfGonbjUSkNkDKm+mE6A@public.gmane.org>
2007-06-18 2:58 ` [PATCH 1/5] KVM paravirt_ops core infrastructure Anthony Liguori
[not found] ` <4675F4C3.6050700-rdkfGonbjUSkNkDKm+mE6A@public.gmane.org>
2007-06-18 8:03 ` Avi Kivity
[not found] ` <46763C6B.9050004-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
2007-06-18 12:25 ` Anthony Liguori
[not found] ` <467679C5.6030201-rdkfGonbjUSkNkDKm+mE6A@public.gmane.org>
2007-06-18 12:28 ` Avi Kivity
2007-06-26 8:04 ` Dor Laor
[not found] ` <64F9B87B6B770947A9F8391472E032160C73025E-yEcIvxbTEBqsx+V+t5oei8rau4O3wl8o3fe8/T/H7NteoWH0uzbU5w@public.gmane.org>
2007-06-26 8:45 ` Jun Koi
[not found] ` <fdaac4d50706260145x1ebceadt432edd5b6a6ac1f2-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2007-06-26 11:57 ` Anthony Liguori
2007-06-26 11:56 ` Anthony Liguori
2007-06-18 2:58 ` [PATCH 2/5] KVM: Implement CR read caching for KVM paravirt_ops Anthony Liguori
[not found] ` <4675F4F1.5090207-rdkfGonbjUSkNkDKm+mE6A@public.gmane.org>
2007-06-18 8:05 ` Avi Kivity
[not found] ` <46763CD3.3060704-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
2007-06-18 12:26 ` Anthony Liguori
2007-06-18 8:11 ` Avi Kivity
[not found] ` <46763E35.8020108-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
2007-06-18 12:27 ` Anthony Liguori
2007-06-18 3:00 ` [PATCH 3/5] KVM: Add paravirt MMU write support Anthony Liguori
[not found] ` <4675F533.40809-rdkfGonbjUSkNkDKm+mE6A@public.gmane.org>
2007-06-18 8:20 ` Avi Kivity
[not found] ` <46764061.9080705-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
2007-06-18 12:33 ` Anthony Liguori
[not found] ` <46767B8C.9050001-rdkfGonbjUSkNkDKm+mE6A@public.gmane.org>
2007-06-18 12:38 ` Avi Kivity
[not found] ` <46767CD1.7030208-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
2007-06-18 12:48 ` Anthony Liguori
2007-06-19 21:57 ` Anthony Liguori
[not found] ` <46785132.3070505-rdkfGonbjUSkNkDKm+mE6A@public.gmane.org>
2007-06-19 22:19 ` Jeremy Fitzhardinge
[not found] ` <4678567C.6040400-TSDbQ3PG+2Y@public.gmane.org>
2007-06-19 22:28 ` Anthony Liguori
2007-06-18 3:00 ` [PATCH 4/5] KVM: Add hypercall queue for paravirt_ops implementation Anthony Liguori
[not found] ` <4675F568.90608-rdkfGonbjUSkNkDKm+mE6A@public.gmane.org>
2007-06-18 4:00 ` Jeremy Fitzhardinge
[not found] ` <46760343.5070401-TSDbQ3PG+2Y@public.gmane.org>
2007-06-18 4:09 ` Jeremy Fitzhardinge
2007-06-18 12:22 ` Anthony Liguori
2007-06-18 9:07 ` Avi Kivity
[not found] ` <46764B47.5060403-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
2007-06-18 12:40 ` Anthony Liguori
[not found] ` <46767D47.1010104-rdkfGonbjUSkNkDKm+mE6A@public.gmane.org>
2007-06-18 12:50 ` Avi Kivity
[not found] ` <46767F98.70109-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
2007-06-18 13:03 ` Gregory Haskins
[not found] ` <1182171781.4593.38.camel-5CR4LY5GPkvLDviKLk5550HKjMygAv58XqFh9Ls21Oc@public.gmane.org>
2007-06-18 13:19 ` Anthony Liguori
[not found] ` <4676867E.1090208-rdkfGonbjUSkNkDKm+mE6A@public.gmane.org>
2007-06-18 13:25 ` Gregory Haskins
2007-06-18 13:22 ` Anthony Liguori
[not found] ` <46768724.3000509-rdkfGonbjUSkNkDKm+mE6A@public.gmane.org>
2007-06-18 13:35 ` Avi Kivity
[not found] ` <46768A3F.2010202-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
2007-06-18 14:02 ` Anthony Liguori
[not found] ` <4676905B.6000805-rdkfGonbjUSkNkDKm+mE6A@public.gmane.org>
2007-06-18 15:08 ` Avi Kivity
[not found] ` <46769FFE.6040502-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
2007-06-18 15:20 ` Anthony Liguori
[not found] ` <4676A2D4.2040704-rdkfGonbjUSkNkDKm+mE6A@public.gmane.org>
2007-06-18 16:01 ` Avi Kivity
2007-06-18 16:00 ` Avi Kivity
[not found] ` <4676AC10.3090007-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
2007-06-18 17:47 ` Anthony Liguori
2007-06-18 3:03 ` [PATCH 5/5] KVM: paravirt time source Anthony Liguori
[not found] ` <4675F601.3090706-rdkfGonbjUSkNkDKm+mE6A@public.gmane.org>
2007-06-18 9:24 ` Avi Kivity
2007-06-18 19:11 ` Jeremy Fitzhardinge
[not found] ` <4676D8E4.3020806-TSDbQ3PG+2Y@public.gmane.org>
2007-06-18 21:52 ` Anthony Liguori
[not found] ` <4676FEB9.6060308-rdkfGonbjUSkNkDKm+mE6A@public.gmane.org>
2007-06-18 22:04 ` Jeremy Fitzhardinge
[not found] ` <46770162.6030101-TSDbQ3PG+2Y@public.gmane.org>
2007-06-18 23:33 ` Anthony Liguori
[not found] ` <4677163F.2030308-rdkfGonbjUSkNkDKm+mE6A@public.gmane.org>
2007-06-18 23:56 ` Jeremy Fitzhardinge
[not found] ` <46771BA0.2000308-TSDbQ3PG+2Y@public.gmane.org>
2007-06-19 0:53 ` Anthony Liguori
2007-06-19 7:44 ` Avi Kivity
[not found] ` <4677894D.3050500-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
2007-06-19 8:04 ` Rusty Russell
2007-06-19 20:38 ` Anthony Liguori
[not found] ` <46783EDB.5010808-rdkfGonbjUSkNkDKm+mE6A@public.gmane.org>
2007-06-19 21:26 ` Jeremy Fitzhardinge [this message]
[not found] ` <46784A0E.3080502-TSDbQ3PG+2Y@public.gmane.org>
2007-06-19 21:38 ` Anthony Liguori
2007-06-21 7:04 ` Dong, Eddie
2007-06-18 3:19 ` [PATCH 0/5] KVM paravirt_ops implementation Jeremy Fitzhardinge
[not found] ` <4675F9DE.6080806-TSDbQ3PG+2Y@public.gmane.org>
2007-06-18 3:36 ` Anthony Liguori
[not found] ` <4675FDCA.4040006-rdkfGonbjUSkNkDKm+mE6A@public.gmane.org>
2007-06-18 4:21 ` Jeremy Fitzhardinge
[not found] ` <4676084F.3090901-TSDbQ3PG+2Y@public.gmane.org>
2007-06-18 12:46 ` Anthony Liguori
[not found] ` <46767EB2.4090707-rdkfGonbjUSkNkDKm+mE6A@public.gmane.org>
2007-06-18 14:46 ` Jeremy Fitzhardinge
[not found] ` <46769AD2.9080105-TSDbQ3PG+2Y@public.gmane.org>
2007-06-18 15:07 ` Anthony Liguori
2007-06-20 0:21 ` Zachary Amsden
[not found] ` <46787325.30804-pghWNbHTmq7QT0dZR+AlfA@public.gmane.org>
2007-06-20 14:22 ` Anthony Liguori
[not found] ` <4679381E.9090404-rdkfGonbjUSkNkDKm+mE6A@public.gmane.org>
2007-06-20 15:32 ` Jeremy Fitzhardinge
[not found] ` <46794899.6070708-TSDbQ3PG+2Y@public.gmane.org>
2007-06-20 19:35 ` Zachary Amsden
[not found] ` <46798174.2060304-pghWNbHTmq7QT0dZR+AlfA@public.gmane.org>
2007-06-20 19:47 ` Jeremy Fitzhardinge
2007-06-20 19:52 ` Anthony Liguori
[not found] ` <46798597.4020903-rdkfGonbjUSkNkDKm+mE6A@public.gmane.org>
2007-06-20 20:03 ` Zachary Amsden
[not found] ` <4679882B.7070605-pghWNbHTmq7QT0dZR+AlfA@public.gmane.org>
2007-06-20 20:16 ` Jeremy Fitzhardinge
[not found] ` <46798B16.5090407-TSDbQ3PG+2Y@public.gmane.org>
2007-06-20 20:27 ` Anthony Liguori
[not found] ` <46798D9B.5000400-rdkfGonbjUSkNkDKm+mE6A@public.gmane.org>
2007-06-20 20:33 ` Jeremy Fitzhardinge
[not found] ` <46798F1A.4090901-TSDbQ3PG+2Y@public.gmane.org>
2007-06-20 20:46 ` Zachary Amsden
[not found] ` <4679921A.8090607-pghWNbHTmq7QT0dZR+AlfA@public.gmane.org>
2007-06-20 20:55 ` Jeremy Fitzhardinge
2007-06-20 22:08 ` Anthony Liguori
[not found] ` <4679A54F.5020908-rdkfGonbjUSkNkDKm+mE6A@public.gmane.org>
2007-06-20 22:33 ` Jeremy Fitzhardinge
2007-06-20 20:43 ` Zachary Amsden
[not found] ` <46799157.3070805-pghWNbHTmq7QT0dZR+AlfA@public.gmane.org>
2007-06-20 20:53 ` Jeremy Fitzhardinge
[not found] ` <467993B1.6000307-TSDbQ3PG+2Y@public.gmane.org>
2007-06-20 21:08 ` Zachary Amsden
[not found] ` <46799755.8060405-pghWNbHTmq7QT0dZR+AlfA@public.gmane.org>
2007-06-20 21:48 ` Jeremy Fitzhardinge
2007-06-20 22:39 ` Anthony Liguori
2007-06-20 20:22 ` Anthony Liguori
[not found] ` <46798C99.8010303-rdkfGonbjUSkNkDKm+mE6A@public.gmane.org>
2007-06-20 20:37 ` Zachary Amsden
[not found] ` <46799001.5020807-pghWNbHTmq7QT0dZR+AlfA@public.gmane.org>
2007-06-20 21:07 ` Jeremy Fitzhardinge
[not found] ` <46799716.9040402-TSDbQ3PG+2Y@public.gmane.org>
2007-06-20 21:27 ` ron minnich
2007-06-20 21:39 ` H. Peter Anvin
2007-06-19 23:49 ` Zachary Amsden
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=46784A0E.3080502@goop.org \
--to=jeremy-tsdbq3pg+2y@public.gmane.org \
--cc=anthony-rdkfGonbjUSkNkDKm+mE6A@public.gmane.org \
--cc=kvm-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org \
--cc=virtualization-qjLDD68F18O7TbgM5vRIOg@public.gmane.org \
/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).