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From: "Russ Cox" <rsc@plan9.bell-labs.com>
To: 9fans@cse.psu.edu
Subject: Re: [9fans] was 8½ slow and that lead to rio?
Date: Wed, 30 Jan 2002 22:48:56 -0500	[thread overview]
Message-ID: <9ee47cf9d056b25b6129187002f0d0f1@plan9.bell-labs.com> (raw)

> memdraw(2) or memlayer(2) works on user memory space.  When we
> try to make it run in cpu(1) environment, huge amount of data will be
> copied from cpu server's user memory space to terminal.  We are dealing
> with several to tens megabyte images, and feel it's slow in a 100MBPS network.
> We may have two ways here( or more?):
> (1) forget cpu(1) command
> (2) do memdraw and memlayer also in  kernel memory space.

memdraw(2) and memlayer(2) exist almost only for the
purpose of implementing the devdraw device in the kernel.
No programs in the standard distribution use them directly.
Are you?  Can you be more specific about the programs
you're running?

Russ



             reply	other threads:[~2002-01-31  3:48 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2002-01-31  3:48 Russ Cox [this message]
  -- strict thread matches above, loose matches on Subject: below --
2002-01-31  5:37 [9fans] was 8½ " okamoto
2002-01-31  5:04 Russ Cox
2002-01-31  4:58 okamoto
2002-01-31  4:57 okamoto
2002-01-31  4:15 Russ Cox
2002-01-31  4:10 okamoto
2002-01-31  1:47 okamoto
2002-01-30 16:18 rob pike
2002-01-30 15:55 Fco.J.Ballesteros

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