From owner-freebsd-hackers Wed Sep 15 9:50:36 1999 Delivered-To: freebsd-hackers@freebsd.org Received: from mailer.syr.edu (mailer.syr.edu [128.230.18.29]) by hub.freebsd.org (Postfix) with ESMTP id 857FE15753 for ; Wed, 15 Sep 1999 09:45:37 -0700 (PDT) (envelope-from cmsedore@mailbox.syr.edu) Received: from rodan.syr.edu by mailer.syr.edu (LSMTP for Windows NT v1.1a) with SMTP id <0.B053D360@mailer.syr.edu>; Wed, 15 Sep 1999 12:34:44 -0400 Received: from localhost (cmsedore@localhost) by rodan.syr.edu (8.8.7/8.8.7) with ESMTP id MAA19770; Wed, 15 Sep 1999 12:34:37 -0400 (EDT) X-Authentication-Warning: rodan.syr.edu: cmsedore owned process doing -bs Date: Wed, 15 Sep 1999 12:34:37 -0400 (EDT) From: Christopher Sedore X-Sender: cmsedore@rodan.syr.edu To: Ruslan Ermilov Cc: Jayson Nordwick , freebsd-hackers@FreeBSD.ORG Subject: Re: kern/13075 (was: Re: aio_*) In-Reply-To: <19990915100619.C86648@relay.ucb.crimea.ua> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII 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. -Chris To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message