From owner-freebsd-hackers Wed Sep 15 10:43:55 1999 Delivered-To: freebsd-hackers@freebsd.org Received: from dingo.cdrom.com (dingo.cdrom.com [204.216.28.145]) by hub.freebsd.org (Postfix) with ESMTP id 0EC2515176 for ; Wed, 15 Sep 1999 10:43:31 -0700 (PDT) (envelope-from mike@dingo.cdrom.com) Received: from dingo.cdrom.com (localhost.cdrom.com [127.0.0.1]) by dingo.cdrom.com (8.9.3/8.8.8) with ESMTP id KAA01010; Wed, 15 Sep 1999 10:33:51 -0700 (PDT) (envelope-from mike@dingo.cdrom.com) Message-Id: <199909151733.KAA01010@dingo.cdrom.com> X-Mailer: exmh version 2.0.2 2/24/98 To: Christopher Sedore Cc: Ruslan Ermilov , Jayson Nordwick , freebsd-hackers@FreeBSD.ORG Subject: Re: kern/13075 (was: Re: aio_*) In-reply-to: Your message of "Wed, 15 Sep 1999 12:34:37 EDT." Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Date: Wed, 15 Sep 1999 10:33:51 -0700 From: Mike Smith Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG > > > On Wed, 15 Sep 1999, Ruslan Ermilov wrote: > > > > The aio_* stuff (I use a custom patched version in 4.x) offers performance > > > advantages over select() with large numbers of descriptors. In terms of > > > efficiency, I don't have any trouble saturating full-duplex 100mbit link > > > with aio routines on a reasonably fast box (PII-400 512MB). > > > > > > As more work gets done to the aio stuff, there are some potential early > > > advantages available to multiprocessor machines (since the program > > > 'driving' the aio could run concurrently with the kernel code moving > > > network or disk data). > > > > > > -Chris > > > > Do you by any change have an idea how to fix PR kern/13075 > > (signal is not posted for async I/O on raw devices) > > Yes. There is no code to post the signal unless the job is of the lio > variety. Writing a fix took about 15 minutes (including reboot). > Extensive testing not included, though the test program provided with the > PR now functions. You plan to file a followup to the PR, I hope. 8) -- \\ The mind's the standard \\ Mike Smith \\ of the man. \\ msmith@freebsd.org \\ -- Joseph Merrick \\ msmith@cdrom.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message