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SubjectRe: Encrypted Swap
On Saturday 18 August 2001 02:52 am, Eric W. Biederman wrote:
> Dan Hollis <> writes:
> > On 17 Aug 2001, Eric W. Biederman wrote:
> > > Clearing memory on most machines takes a 1s or less. Think of
> > > memory fill rates at the 800MB/s level. Most BIOS's seem to clear
> > > some of the memory but I haven't read their code to see what they
> > > are doing.
> >
> > Ive measured rates far lower than that, at least for SDRAM.
> Hmm. The numbers were off the top of my head and I've been messing
> with DDR SDRAM quite a bit so I may have doubled it. Hmm.
> Nope. I was remember something close to the typical streams numbers
> on an Athlon with DDR SDRAM. Since those are read-modify-write
> numbers they should be close to the write numbers for normal SDRAM.
> With a PII/PIII and PC100 SDRAM I have measured about 640 MB/s writes.

I'm not sure where you're pulling these numbers from, but being a
hardcore FPS gamer, I can tell you from experience, PC100 SDRAM does NOT
hit 640MB/sec! Esspecialy not on a PII! PC100 SDRAM on my current 800Mhz
non-tbird Athlon currently peaks near 250MB/sec
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