Re: Re: PPC cflags

On Sun, Feb 20, 2005 at 10:19:07PM +0100, hjk wrote:
> [dom 20/02/2005, ore 16:25] => David Bélanger scriveva:
> 
> > On Sun, Feb 20, 2005 at 03:55:58PM -0500, Nick Smith wrote:
> > > 
> > > i am getting 696.32 on my G3 350Mhz off the boot cd during the
> > > install. (whatever Bogomips are?)
> > > 
> > 
> > It's only a value computed by the kernel that has some purposes in the
> > kernel.  It gets print for "fun" but should not be regarded as a
> > performance measure.
> > 
> 
> yes, i don't regard it as a performance measure, yet i am curious about the 
> reason why i get so few bogomips :)
> 
> i'm using a 2.6 kernel with sysfs, i have the "performance" governor enabled in 
> /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor and my cpu is running 
> at 998.400 Mhz as stated in /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq
> 

It's for timing purposes:
http://www.tldp.org/HOWTO/BogoMips/x78.html#AEN81

G3 = 750   - clock cycle * 2.0.  Is your CPU clocked as 350MHz or
1000MHz...  If at 350MHz, 696 is pretty close to the 700 BogoMIPS should
have.

David

---

David Bélanger
Web page:   http://www.cs.mcgill.ca/~dbelan2/
Public key: http://www.cs.mcgill.ca/~dbelan2/public_key.txt


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