Date: Wed, 15 Sep 1999 10:33:51 -0700 From: Mike Smith <mike@smith.net.au> To: Christopher Sedore <cmsedore@mailbox.syr.edu> Cc: Ruslan Ermilov <ru@ucb.crimea.ua>, Jayson Nordwick <nordwick@scam.xcf.berkeley.edu>, freebsd-hackers@FreeBSD.ORG Subject: Re: kern/13075 (was: Re: aio_*) Message-ID: <199909151733.KAA01010@dingo.cdrom.com> In-Reply-To: Your message of "Wed, 15 Sep 1999 12:34:37 EDT." <Pine.SOL.4.10.9909151232330.1425-100000@rodan.syr.edu>
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> > > 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
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