All of lore.kernel.org
 help / color / mirror / Atom feed
From: Lee Revell <rlrevell@joe-job.com>
To: Tony Lindgren <tony@atomide.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>,
	Pavel Machek <pavel@suse.cz>,
	Arjan van de Ven <arjan@infradead.org>,
	Martin Schwidefsky <schwidefsky@de.ibm.com>,
	Andrea Arcangeli <andrea@suse.de>,
	George Anzinger <george@mvista.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	john stultz <johnstul@us.ibm.com>,
	Zwane Mwaikambo <zwane@arm.linux.org.uk>,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH] Dynamic tick, version 050127-1
Date: Tue, 01 Feb 2005 15:20:05 -0500	[thread overview]
Message-ID: <1107289206.18349.16.camel@krustophenia.net> (raw)
In-Reply-To: <20050127212902.GF15274@atomide.com>

On Thu, 2005-01-27 at 13:29 -0800, Tony Lindgren wrote:
> Hi all,
> 
> Thanks for all the comments, here's an updated version of the dynamic
> tick patch.

Hi,

I was wondering how Windows handles high res timers, if at all.  The
reason I ask is because I have been reverse engineering a Windows ASIO
driver, and I find that if the latency is set below about 5ms, by
examining the kernel timer queue with SoftICE I can see that several
kernel timers with 1ms period are created.  (Presumably the sound card's
interval timer is used for longer periods).

But, I have seen people mention in the "singing capacitor" threads on
this list that Windows uses 100 for HZ.

So, how do they implement 1ms timers with a 10ms tick rate?  Does
Windows dynamically reprogram the PIT as well?

Lee


  parent reply	other threads:[~2005-02-01 20:20 UTC|newest]

Thread overview: 38+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2005-01-27 21:29 [PATCH] Dynamic tick, version 050127-1 Tony Lindgren
2005-01-27 21:50 ` Tony Lindgren
2005-02-01 11:00 ` Pavel Machek
2005-02-01 20:40   ` Tony Lindgren
2005-02-01 21:25     ` Pavel Machek
2005-02-01 23:03       ` Tony Lindgren
2005-02-02 13:50         ` Pavel Machek
2005-02-02 13:50         ` Pavel Machek
2005-02-02 13:56         ` Pavel Machek
2005-02-02 14:11         ` Pavel Machek
2005-02-03  3:04           ` Tony Lindgren
2005-02-03 10:56             ` Pavel Machek
2005-02-03 16:43               ` Tony Lindgren
2005-02-04  5:19                 ` Tony Lindgren
2005-02-04  6:33                   ` Zwane Mwaikambo
2005-02-04 17:18                     ` Tony Lindgren
2005-02-04 17:31                       ` Zwane Mwaikambo
2005-02-04 17:42                         ` Tony Lindgren
2005-02-04 17:54                           ` Zwane Mwaikambo
2005-02-04 18:58                             ` Tony Lindgren
2005-02-04 19:24                               ` Tony Lindgren
2005-02-05 23:00                   ` Pavel Machek
2005-02-06  2:33                     ` Tony Lindgren
2005-02-06  3:54                       ` Tony Lindgren
2005-02-06  8:41                         ` Pavel Machek
2005-02-06  8:50                         ` Pavel Machek
2005-02-06 17:07                           ` Tony Lindgren
2005-02-06 12:15                         ` Pavel Machek
2005-02-06 17:08                           ` Tony Lindgren
2005-02-06  8:11                       ` Pavel Machek
2005-02-06  8:53                         ` Lee Revell
2005-02-06 10:25                           ` Pavel Machek
2005-02-07 22:08                             ` George Anzinger
2005-02-06 17:10                         ` Tony Lindgren
2005-02-06 18:34                           ` Pavel Machek
2005-02-01 20:20 ` Lee Revell [this message]
2005-02-01 23:42   ` Tony Lindgren
2005-02-02  1:06   ` Eric St-Laurent

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=1107289206.18349.16.camel@krustophenia.net \
    --to=rlrevell@joe-job.com \
    --cc=andrea@suse.de \
    --cc=arjan@infradead.org \
    --cc=benh@kernel.crashing.org \
    --cc=george@mvista.com \
    --cc=johnstul@us.ibm.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=pavel@suse.cz \
    --cc=schwidefsky@de.ibm.com \
    --cc=tglx@linutronix.de \
    --cc=tony@atomide.com \
    --cc=zwane@arm.linux.org.uk \
    /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.