Re: Hugepages demand paging V2 [0/8]: Discussion and overview

[Jesse Barnes <jbarnes@engr.sgi.com>]

On Tuesday, October 26, 2004 7:35 am, Robin Holt wrote:
> Sorry for being a stickler here, but the BTE is really part of the
> I/O Interface portion of the shub.  That portion has a seperate clock
> frequency from the memory controller (unfortunately slower).  The BTE
> can zero at a slightly slower speed than the processor.  It does, as
> you pointed out, not trash the CPU cache.

I guess I was getting ahead of myself :).  I knew that it was part of the II 
but didn't know it had a slower clock frequency than the MD.

> One other feature of the BTE is it can operate asynchronously from
> the cpu.  This could be used to, during a clock interrupt, schedule
> additional huge page zero filling on multiple nodes at the same time.
> This could result in a huge speed boost on machines that have multiple
> memory only nodes.  That has not been tested thoroughly.  We have done
> considerable testing of the page zero functionality as well as the
> error handling.

Might be worth some additional testing...

Jesse