Subject: Re: copyin/out
To: Allen Briggs <firstname.lastname@example.org>
From: Ben Harris <email@example.com>
Date: 08/11/2002 21:58:24
On Sun, 11 Aug 2002, Ben Harris wrote:
> More experimentation. I've replaced runs of STR and LDR with STM and
> LDM, tweaking the register usage in copyin to make the runs longer. The
> diff's attached.
> Same test as ever: dd if=/dev/zero of=/dev/null count=1024 bs=1024k
With an extra hack, it works on 26-bit machines as well:
ARM3, 25 MHz, 4KB unified cache:
bjh21old: 1073741824 bytes transferred in 984.083 secs (1091109 bytes/sec)
bjh21: 1073741824 bytes transferred in 198.960 secs (5396772 bytes/sec)
I'll commit this in a moment (Jason seems to think this is OK).
Ben Harris <firstname.lastname@example.org>
Portmaster, NetBSD/acorn26 <URL:http://www.netbsd.org/Ports/acorn26/>