All of lore.kernel.org
 help / color / mirror / Atom feed
From: Tony Lindgren <tony@atomide.com>
To: Kyungmin Park <kmpark@infradead.org>
Cc: linux-omap-open-source@linux.omap.com
Subject: Re: [PATCH] Make dyntick work again
Date: Fri, 12 Oct 2007 13:06:12 -0700	[thread overview]
Message-ID: <20071012200612.GE7979@atomide.com> (raw)
In-Reply-To: <002c01c80c74$9f0f5160$e1ac580a@swcenter.sec.samsung.co.kr>

Hi,

* Kyungmin Park <kmpark@infradead.org> [071011 19:07]:
> Hi,
> 
> Umm, there's a problem, I can't boot with timer32k.
> It halts at here.

<snip>

> It's also can't boot 2.6.22, umm I will track this one.

Hmm, works on n800 which is 2420. Maybe it's some 2430 related issue?
 
> Anyway, I used the mpu timer and here's the dyntick result. (mpu also support the oneshot in the code)
> Is it the right results?
> 
> / # grep time /proc/interrupts ; sleep 10; grep time /proc/interrupts
>  37:        714        INTC  gp timer
>  37:        787        INTC  gp timer
> / # grep time /proc/interrupts ; sleep 10; grep time /proc/interrupts
>  37:        880        INTC  gp timer
>  37:        959        INTC  gp timer

Yes, (959 - 880) / 10 = 7 ticks per second. We should be able to get
down to ~2 ticks per second with an idle system already, so sounds
like there are some kernel timers running.

Time to try powertop on omap!

Tony

  parent reply	other threads:[~2007-10-12 20:06 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-10-11 20:32 [PATCH] Make dyntick work again Tony Lindgren
2007-10-12  2:05 ` Kyungmin Park
2007-10-12 14:47   ` Dirk Behme
2007-10-12 20:07     ` Tony Lindgren
2007-10-12 20:06   ` Tony Lindgren [this message]
2007-10-12 20:16     ` Woodruff, Richard
2007-10-12 20:22       ` Tony Lindgren

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=20071012200612.GE7979@atomide.com \
    --to=tony@atomide.com \
    --cc=kmpark@infradead.org \
    --cc=linux-omap-open-source@linux.omap.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.