To answer my own question:

1) Set mpurate in u-boot, or
2) Use the cpufreq tools in linux.

Apparently Sakoman's u-boot limits the CPU freq to something lower than the max rate of my Overo Fire.

Regards,
Greg



From: Greg Kogut <gkogut@yahoo.com>
To: General mailing list for gumstix users. <gumstix-users@lists.sourceforge.net>
Sent: Tuesday, March 13, 2012 12:01 PM
Subject: setting Overo CPU speed

I recently swapped my gumstix OS  from a custom OE/Anstrom  OS running off uSD to the latest sakoman console image running off nand. 

I noticed a large performance drop with the sakoman image (with identical binaries).  It's not disk-related - my program performs no disk IO.  

cat /proc/cpuinfo was identical except the sakoman image reported lower BogoMIPS for the sakoman console image.  Here is the reported difference:

BogoMIPS : 719.47
BogoMIPS : 497.82

Any ideas what's going on here, and how to resolve?  (google wasn't a big help initially).

Regards,
Greg