Subject: Re: Faster pipes, now with uvm_loan()
To: None <tech-kern@netbsd.org>
From: Frank van der Linden <fvdl@wasabisystems.com>
List: tech-kern
Date: 04/10/2001 14:20:58
On Tue, Apr 10, 2001 at 02:16:10PM +0200, Frank van der Linden wrote:
> See below. We're not quite up to FreeBSD 4.2 (which has approximately
> the same code), but close to Linux. For sizes <= 64k that is. I
> assume that has to do with the PIPE_SIZE and BIG_PIPE_SIZE values
> (BIG_PIPE_SIZE is 64k).

Nothing like talking to yourself. Looking at it, I see that FreeBSD
has the same defines for PIPE_SIZE and BIG_PIPE_SIZE, do I don't
know why Jaromir's port of the code slows down above 64k, and
FreeBSD doesn't.

- Frank