RE: [RFC] 4-level page table directories.

From: Chen, Kenneth W <kenneth.w.chen_at_intel.com>
Date: 2005-11-04 06:59:00
Robin Holt wrote on Thursday, November 03, 2005 8:37 AM
> On Wed, Nov 02, 2005 at 05:53:10PM -0800, Chen, Kenneth W wrote:
> > I just did a quick measurement with I/O submission path.  get_user_pages
> > is my biggest concern that extra level means more code and cache foot
> > print for each I/O submission.  It cost about 1.5% more in I/O path
> > length on a micro-benchmark (from block layer and Up).  This could be
> > all buried as noise in a larger scheme for industry database benchmark.
> 
> Can you point me at the benchmark?

Here, kernel null blk driver:
http://marc.theaimsgroup.com/?l=linux-kernel&m=111033439400836&w=2


And here: user space micro-benchmark:
http://marc.theaimsgroup.com/?l=linux-kernel&m=111033404219628&w=2


- Ken

-
To unsubscribe from this list: send the line "unsubscribe linux-ia64" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Received on Fri Nov 04 06:59:38 2005

This archive was generated by hypermail 2.1.8 : 2005-11-04 06:59:46 EST