Subject: Re: ARM9 cache routines updated
To: None <port-arm@netbsd.org>
From: Hiroyuki Bessho <bsh@grotto.jp>
List: port-arm
Date: 02/16/2004 07:25:28
Richard Earnshaw <rearnsha@arm.com> writes:

>
> Another useful test that I sometimes run is to time how long it takes to 
> run the configure script for the 'GNU make' source package.
>

  I did it. Kernels are same ones I used in the last report.

  2410-a: backed out both write-back dcache change and clocking-mode
          bits fix in arm9_setup().
          (using sys/arm/include/cpufunc.h:1.29, sys/arm/arm/cpufunc.c:1.65, 
          sys/arm/arm/cpufunc_asm_arm9.S:1.2)

  2410-b: with clocking-mode bits fix in arm9_setup(), and without
          write-back d-cache.

  2410-c: with write-back d-cache chages, and without clocking-mode
          bits fix.


  2410-d: both write-back d-cache changes and clocking-mode bits fix.

smdk2410-a:
      246.77 real       129.77 user        96.28 sys
      234.45 real       127.70 user        93.97 sys
      234.01 real       126.54 user        93.70 sys

smdk2410-b:
      199.95 real        92.56 user        86.82 sys
      188.92 real        91.76 user        84.83 sys
      189.17 real        92.93 user        85.16 sys

smdk2410-c:
      233.45 real       124.55 user        89.14 sys
      222.25 real       123.29 user        86.29 sys
      222.24 real       124.37 user        85.27 sys

smdk2410-d:
      180.17 real        86.79 user        74.54 sys
      170.78 real        86.71 user        72.11 sys
      170.51 real        87.95 user        72.30 sys


  The performance increase was quite obvious.  Thank you for your great
job.

  Do you think we'll have more speed-up if we could actually use
dcache_inv_range?

--
bsh.