From: Vojtech Pavlik <vojtech@suse.cz>
To: Lee Revell <rlrevell@joe-job.com>
Cc: Adam Goode <adam@evdebs.org>, Pavel Machek <pavel@suse.cz>,
Alejandro Bonilla <abonilla@linuxwireless.org>,
linux-kernel@vger.kernel.org, linux-thinkpad@linux-thinkpad.org
Subject: Re: IBM HDAPS Someone interested?
Date: Tue, 21 Jun 2005 18:45:19 +0200 [thread overview]
Message-ID: <20050621164519.GA11601@ucw.cz> (raw)
In-Reply-To: <1119368259.19357.18.camel@mindpipe>
On Tue, Jun 21, 2005 at 11:37:38AM -0400, Lee Revell wrote:
> On Mon, 2005-06-20 at 17:30 -0400, Adam Goode wrote:
> > Freefall detection: 300 ms
> > Head park time: 300-500 ms
> > (from page 2 of document)
> >
> > Still doesn't seem too bad to figure out how to code though, at least
> > once we can figure out how to get the data stream!
> >
> > P.S. The main control system runs as a Windows kernel driver. Not as
> > safe as full hardware, but probably better than userspace. :)
> >
>
> Ugh, if userspace can't meet a 300ms RT constraint, that's a pretty
> shitty OS you have there.
It's not that you do one measurement in the 300ms. You need to do at least
100, and some computations, too.
> This should certainly be done in userspace on Linux.
So it's a 3ms RT constraint, which is not as easy.
--
Vojtech Pavlik
SuSE Labs, SuSE CR
next prev parent reply other threads:[~2005-06-21 16:48 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-06-20 15:18 Alejandro Bonilla
2005-06-20 15:57 ` Vojtech Pavlik
2005-06-20 16:16 ` Alejandro Bonilla
2005-06-20 16:34 ` Vojtech Pavlik
2005-06-20 16:53 ` Alejandro Bonilla
2005-06-20 16:57 ` Pavel Machek
2005-06-20 20:35 ` Yani Ioannou
2005-06-20 20:45 ` Vojtech Pavlik
2005-06-20 21:25 ` Pavel Machek
2005-06-20 21:30 ` Adam Goode
2005-06-21 15:37 ` Lee Revell
2005-06-21 16:45 ` Vojtech Pavlik [this message]
2005-06-21 17:36 ` Lee Revell
2005-06-21 18:16 ` Valdis.Kletnieks
2005-06-22 14:37 ` Sander
2005-06-22 14:52 ` Alejandro Bonilla
2005-06-20 21:45 ` Pavel Machek
2005-06-20 21:54 ` Alejandro Bonilla
2005-06-20 23:45 ` Alejandro Bonilla
2005-06-20 17:04 ` [ltp] " Lenz Grimmer
2005-06-20 17:17 ` Alejandro Bonilla
2005-06-20 18:57 ` Pekka Enberg
2005-06-20 20:13 ` Andrew Haninger
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=20050621164519.GA11601@ucw.cz \
--to=vojtech@suse.cz \
--cc=abonilla@linuxwireless.org \
--cc=adam@evdebs.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-thinkpad@linux-thinkpad.org \
--cc=pavel@suse.cz \
--cc=rlrevell@joe-job.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
all inboxes | Powered by JetHome®