From: Michael Raymond <mraymond@sgi.com>
To: Peter Chubb <peterc@gelato.unsw.edu.au>
Cc: linux-kernel@vger.kernel.org
Subject: Re: User mode drivers: part 1, interrupt handling (patch for 2.6.11)
Date: Fri, 11 Mar 2005 07:50:32 -0600 [thread overview]
Message-ID: <20050311075029.A92696@goliath.americas.sgi.com> (raw)
In-Reply-To: <16945.4650.250558.707666@berry.gelato.unsw.EDU.AU>; from peterc@gelato.unsw.edu.au on Fri, Mar 11, 2005 at 02:36:10PM +1100
I have many users asking for something like this. Peter's approach is
simple and it appears to solve the problem for many situations.
With that in mind though, for a more complicated but higher performing
approach please take a look at the User Level Interrupt (ULI) project at
http://oss.sgi.com/projects/uli/. It requires some per-arch assembly but
with some recent changes we're seeing ~1.5us latency from hardware event to
user space function start. I'm hoping to add an IA32 port out soon.
Thanks,
Michael
On Fri, Mar 11, 2005 at 02:36:10PM +1100, Peter Chubb wrote:
>
> As many of you will be aware, we've been working on infrastructure for
> user-mode PCI and other drivers. The first step is to be able to
> handle interrupts from user space. Subsequent patches add
> infrastructure for setting up DMA for PCI devices.
--
Michael A. Raymond Office: (651) 683-3434
Core OS Group Real-Time System Software
next prev parent reply other threads:[~2005-03-11 13:50 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-03-11 3:36 Peter Chubb
2005-03-11 10:29 ` Pavel Machek
2005-03-12 16:27 ` Jon Smirl
2005-03-12 18:55 ` Jon Smirl
2005-03-14 0:39 ` Peter Chubb
2005-03-14 1:24 ` Jon Smirl
2005-03-11 13:50 ` Michael Raymond [this message]
2005-03-11 17:25 ` Greg KH
2005-03-11 17:31 ` Michael Raymond
2005-03-11 19:14 ` Alan Cox
2005-03-13 2:03 ` Jon Smirl
2005-03-15 4:32 ` Lee Revell
2005-03-15 13:28 ` Alan Cox
2005-03-14 0:02 ` Peter Chubb
2005-03-14 13:33 ` Alan Cox
2005-03-15 3:15 ` Jon Smirl
2005-03-12 15:55 ` Jon Smirl
2005-03-12 17:11 ` Zwane Mwaikambo
2005-03-14 1:55 ` Jon Smirl
2005-03-14 3:04 ` Peter Chubb
2005-03-14 0:36 ` Peter Chubb
[not found] ` <9e47339105031317193c28cbcf@mail.gmail.com>
2005-03-14 1:42 ` Peter Chubb
2005-03-14 1:52 ` Jon Smirl
2005-03-14 3:06 ` Peter Chubb
2005-03-15 3:19 ` Jon Smirl
2005-03-15 3:47 ` Peter Chubb
2005-03-15 3:50 ` Jon Smirl
2005-03-15 4:11 ` Peter Chubb
2005-03-15 19:20 Stephen Warren
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