From mboxrd@z Thu Jan  1 00:00:00 1970
Message-ID: <40C66BDC.6070301@yahoo.com>
Date: Tue,  8 Jun 2004 18:46:04 -0700
From: Matt Pidd-Cheshire <axwrt001@yahoo.com>
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To: Fans of the OS Plan 9 from Bell Labs <9fans@cse.psu.edu>
Subject: Re: [9fans] NOW it's like lightning
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Rob Pike perceptively observed :

> i wonder if you have DMA turned off on your disk.
> also, i've known CPUs to disable their caches
> sometimes. is the machine healthy when running
> other programs?

it seemed like a worthwhile wheeze ...

echo 'dma on' > /dev/sdC0/ctl
echo 'dma on' > /dev/sdD0/ctl

and Bling! Comparable speed!
My hat is raised to you sir.

In fact that brings to mind a thought ... does this
DMA business also apply to the ether drivers - as this
would explain the ~250Kb/sec transfer Plan 9 <-> BSD
versus the 2.5Mb/sec transfer WindazXP <-> BSD ...

and begs the question, pray why might these be off
by default ...  ?

and since this is a job-lot; can ftpfs operate in a mode
where it doesn't first make a local copy of a file to ship
across the link but instead reads the file itself ?

many thanks