All of lore.kernel.org
 help / color / mirror / Atom feed
From: John Stultz <john.stultz@linaro.org>
To: Andrew Richardson <chardson@umich.edu>
Cc: Dmitry Antipov <dmitry.antipov@linaro.org>,
	linaro-dev@lists.linaro.org, linux-omap@vger.kernel.org
Subject: Re: Minimum timing resolution in Ubuntu/Linaro on the PandaBoard ES
Date: Wed, 08 Feb 2012 09:05:02 -0800	[thread overview]
Message-ID: <1328720702.8119.11.camel@js-netbook> (raw)
In-Reply-To: <51DAA6EF-1C3B-4964-8447-893D295E51A1@umich.edu>

On Wed, 2012-02-08 at 04:32 -0500, Andrew Richardson wrote:
> Ah, very interesting.

>         > dmesg | grep clock
>         [    0.000000] OMAP clockevent source: GPTIMER1 at 32768 Hz
>         [    0.000000] sched_clock: 32 bits at 32kHz, resolution
>         30517ns, wraps every 131071999ms

Hrm. So 30us is still much smaller then the 2.5ms you were seeing. So
that doesn't fully explain the behavior.

thanks
-john





  parent reply	other threads:[~2012-02-08 17:06 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <4F31A91B.8080106@umich.edu>
2012-02-08  5:21 ` Minimum timing resolution in Ubuntu/Linaro on the PandaBoard ES Dmitry Antipov
     [not found]   ` <4F32063F.1020607-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
2012-02-08  9:32     ` Andrew Richardson
2012-02-08 13:55       ` Dmitry Antipov
2012-02-08 14:21         ` Andrew Richardson
2012-02-08 17:05       ` John Stultz [this message]
2012-02-08 17:08       ` John Stultz
2012-02-08 18:19         ` Turgis, Frederic
2012-02-08 16:58     ` John Stultz
2012-02-10  0:56   ` Ming Lei

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=1328720702.8119.11.camel@js-netbook \
    --to=john.stultz@linaro.org \
    --cc=chardson@umich.edu \
    --cc=dmitry.antipov@linaro.org \
    --cc=linaro-dev@lists.linaro.org \
    --cc=linux-omap@vger.kernel.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 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.