From: David Leimbach <leimy2k@gmail.com>
To: Fans of the OS Plan 9 from Bell Labs <9fans@9fans.net>
Subject: Re: [9fans] πp
Date: Wed, 13 Oct 2010 16:15:09 -0700 [thread overview]
Message-ID: <AANLkTi=_dac_-FWNd=fcZmQGY74HJQTnCk-LcbB+o+8x@mail.gmail.com> (raw)
In-Reply-To: <AANLkTimZS1jvvGrtzxZhS=iM4rkje1t=PbYL-rCN1cEO@mail.gmail.com>
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2010/10/13 roger peppe <rogpeppe@gmail.com>
> 2010/10/13 David Leimbach <leimy2k@gmail.com>:
> > I guess I do not understand how 9p doesn't support pipelining. All
> > requests are tagged and can be dealt with between client and server in
> > any order right?
>
> two issues (at least):
>
> 1) concurrently sent requests can be reordered (they're serviced in
> separate
> threads on the server) which means that, when reading from a streaming file
> which ignores file offsets, you don't necessarily get data back in the
> order that
> you asked for it.
>
> 2) you can't pipeline requests if the result of one request depends on the
> result of a previous. for instance: walk to file, open it, read it, close
> it.
> if the first operation fails, then subsequent operations will be invalid.
>
I guess I'm trying to imagine how specifically you could pipeline, not the
general ways in which pipelining will fail with 9P.
>
> >
> > On Wednesday, October 13, 2010, Eric Van Hensbergen <ericvh@gmail.com>
> wrote:
> >> For folks interested in more info on the πp portion of Noah's Osprey
> talk,
> >> Anant's thesis is available online: http://proness.kix.in/misc/
> πp-v2.pdf
> >>
> >> -eric
> >>
> >>
> >
> >
>
>
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next prev parent reply other threads:[~2010-10-13 23:15 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-10-13 19:46 Eric Van Hensbergen
2010-10-13 22:13 ` David Leimbach
2010-10-13 22:36 ` roger peppe
2010-10-13 23:15 ` David Leimbach [this message]
2010-10-14 4:25 ` blstuart
2010-10-13 23:24 ` Venkatesh Srinivas
2010-10-14 21:12 ` Latchesar Ionkov
2010-10-14 21:48 ` erik quanstrom
2010-10-14 22:14 ` dorin bumbu
2010-10-15 14:07 ` erik quanstrom
2010-10-15 14:45 ` Russ Cox
2010-10-15 15:41 ` Latchesar Ionkov
2010-10-15 21:13 ` dorin bumbu
2010-10-15 22:13 ` erik quanstrom
2010-10-15 23:30 ` dorin bumbu
2010-10-15 23:45 ` cinap_lenrek
2010-10-15 23:54 ` dorin bumbu
2010-10-15 7:24 ` Sape Mullender
2010-10-15 10:41 ` hiro
2010-10-15 12:11 ` Jacob Todd
2010-10-15 13:06 ` Iruatã Souza
2010-10-15 13:23 ` Sape Mullender
2010-10-15 14:57 ` David Leimbach
2010-10-15 14:54 ` David Leimbach
2010-10-15 14:59 ` Francisco J Ballesteros
2010-10-15 16:19 ` cinap_lenrek
2010-10-15 16:28 ` Lyndon Nerenberg
2010-10-15 17:54 ` Nemo
2010-10-15 17:49 ` ron minnich
2010-10-15 18:56 ` erik quanstrom
2010-10-15 16:31 ` Latchesar Ionkov
2010-10-15 16:40 ` cinap_lenrek
2010-10-15 16:43 ` Latchesar Ionkov
2010-10-15 17:11 ` cinap_lenrek
2010-10-15 17:15 ` Latchesar Ionkov
2010-10-15 19:10 ` erik quanstrom
2010-10-15 19:16 ` Latchesar Ionkov
2010-10-15 21:43 ` Julius Schmidt
2010-10-15 22:02 ` David Leimbach
2010-10-15 22:05 ` John Floren
2010-10-15 16:45 ` ron minnich
2010-10-15 17:26 ` Eric Van Hensbergen
2010-10-15 17:45 ` Charles Forsyth
2010-10-15 17:45 ` ron minnich
2010-10-15 18:03 ` Bakul Shah
2010-10-15 18:45 ` David Leimbach
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