From: jmk@plan9.bell-labs.com
To: 9fans@cse.psu.edu
Subject: Re: [9fans] acme, rio workalike available in plan 9 ports
Date: Tue, 20 Apr 2004 13:39:32 -0400 [thread overview]
Message-ID: <ec03a84b52717e7b9769aed5ffc54a31@plan9.bell-labs.com> (raw)
In-Reply-To: <Pine.LNX.4.58.0404201228420.31294@wasabi.cs.wisc.edu>
It is flushed entirely at other times (like on a page fault) when it doesn't
need to be. The instructions to do that didn't exist on the original 386.
On Tue Apr 20 13:35:46 EDT 2004, eli@cs.wisc.edu wrote:
>
> On Tue, 20 Apr 2004 jmk@plan9.bell-labs.com wrote:
>
> >
> > On Tue Apr 20 11:53:45 EDT 2004, rminnich@lanl.gov wrote:
> > > On Tue, 20 Apr 2004, Eli Collins wrote:
> > >
> > > > Regarding the TLB and SOs, I can't figure out all the fuss either since
> > > > the TLB is flushed on context switch (on x86 at least).
> > >
> > > and that's the problem.
> > >
> > > ron
> >
> > Plan 9 on the x86 does not do a very good job of managing the TLB, when
> > the port was done there was only the option of flushing it entirely. Better
> > code for the modern variants may happen.
> >
>
> Where could it be improved? My understanding is that on x86 the TLB needs
> to be flushed entirely on context switch regardless of the OS (unless you
> want to carve up the 4GB linear address space among all proceses and use
> segmentation registers).
>
next prev parent reply other threads:[~2004-04-20 17:39 UTC|newest]
Thread overview: 102+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-03-21 4:51 Russ Cox
2004-03-21 21:03 ` andrey mirtchovski
2004-03-22 16:30 ` Axel Belinfante
2004-03-23 9:59 ` Bengt Kleberg
2004-03-23 12:23 ` boyd, rounin
2004-03-23 13:17 ` David Presotto
2004-03-23 13:30 ` boyd, rounin
2004-03-23 15:04 ` Fco.J.Ballesteros
2004-03-23 15:39 ` a
2004-03-23 15:09 ` Russ Cox
2004-03-23 15:12 ` Charles Forsyth
2004-03-23 15:29 ` Russ Cox
2004-03-23 15:13 ` Charles Forsyth
2004-03-23 15:39 ` Axel Belinfante
2004-03-23 15:49 ` a
2004-03-23 16:23 ` Russ Cox
2004-03-23 16:27 ` Axel Belinfante
2004-03-23 16:54 ` a
2004-04-01 10:50 ` Bengt Kleberg
2004-04-01 13:24 ` Russ Cox
2004-04-01 13:54 ` Scott Schwartz
2004-04-01 14:33 ` boyd, rounin
2004-04-01 16:14 ` Russ Cox
2004-04-01 15:25 ` boyd, rounin
2004-04-02 9:29 ` Bengt Kleberg
2004-04-02 10:09 ` Bengt Kleberg
2004-04-02 11:15 ` Steve Simon
2004-04-02 15:24 ` boyd, rounin
2004-04-19 10:04 ` Bengt Kleberg
2004-04-02 11:55 ` C H Forsyth
2004-04-02 14:30 ` Russ Cox
2004-04-02 14:53 ` C H Forsyth
2004-04-19 10:04 ` Bengt Kleberg
2004-04-19 11:07 ` Steve Simon
2004-04-20 8:38 ` Bengt Kleberg
2004-04-20 12:12 ` boyd, rounin
2004-04-20 12:20 ` lucio
2004-04-20 12:32 ` boyd, rounin
2004-04-20 12:58 ` lucio
2004-04-20 13:03 ` lucio
2004-04-21 9:03 ` Bengt Kleberg
2004-04-21 9:17 ` Charles Forsyth
2004-04-21 9:02 ` Bengt Kleberg
2004-04-21 9:02 ` Bengt Kleberg
2004-04-21 9:28 ` lucio
2004-04-21 13:53 ` boyd, rounin
2004-04-19 15:00 ` Russ Cox
2004-04-19 18:51 ` boyd, rounin
2004-04-20 8:38 ` Bengt Kleberg
2004-04-20 12:15 ` boyd, rounin
2004-04-20 14:56 ` ron minnich
2004-04-20 17:43 ` Eli Collins
2004-04-20 15:51 ` ron minnich
2004-04-20 17:10 ` jmk
2004-04-20 17:34 ` Eli Collins
2004-04-20 17:39 ` jmk [this message]
2004-04-20 19:42 ` boyd, rounin
2004-04-20 19:09 ` ron minnich
2004-04-20 16:10 ` Charles Forsyth
2004-04-20 16:21 ` ron minnich
2004-04-20 16:40 ` Eli Collins
2004-04-20 19:31 ` boyd, rounin
2004-04-20 19:20 ` boyd, rounin
2004-03-24 10:42 ` Axel Belinfante
2004-03-21 5:07 Noah Evans
2004-03-21 5:25 ` Russ Cox
2004-03-21 6:12 ` Scott Schwartz
2004-03-21 14:02 ` Russ Cox
2004-03-21 15:57 Noah Evans
2004-03-21 20:43 Andrey S. Kukhar
2004-03-21 21:45 Noah Evans
2004-03-21 22:15 ` andrey mirtchovski
2004-04-20 23:04 boyd, rounin
2004-04-20 23:18 ` matt
2004-04-20 23:26 ` Geoff Collyer
2004-04-20 23:28 ` boyd, rounin
2004-04-20 23:48 ` matt
2004-04-20 23:59 ` Charles Forsyth
2004-04-21 3:18 ` Bruce Ellis
2004-04-21 8:51 ` matt
2004-04-21 9:24 ` Charles Forsyth
2004-04-21 9:49 ` C H Forsyth
2004-04-21 12:14 ` boyd, rounin
2004-04-21 0:07 ` Russ Cox
2004-04-21 0:18 ` ron minnich
2004-04-21 0:19 ` boyd, rounin
2004-04-21 2:09 ` ron minnich
2004-04-21 2:20 ` boyd, rounin
2004-04-21 3:43 ` Ronald G. Minnich
2004-04-23 8:55 ` Christoph Hellwig
2004-04-23 8:59 ` boyd, rounin
2004-04-23 15:03 ` ron minnich
2004-04-23 15:29 ` Christoph Hellwig
2004-04-23 15:54 ` ron minnich
2004-04-23 16:20 ` Joel Salomon
2004-04-23 17:03 ` ron minnich
2004-04-23 16:47 ` Christoph Hellwig
2004-04-23 17:04 ` ron minnich
2004-04-23 17:52 ` Christoph Hellwig
2004-04-21 0:40 ` andrey mirtchovski
2004-04-21 3:25 ` Bruce Ellis
2004-04-21 0:38 Charles Forsyth
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