[prev in list] [next in list] [prev in thread] [next in thread] 

List:       linux-kernel
Subject:    Re: [PATCH 6/9] clockpro-clockpro.patch
From:       Marcelo Tosatti <marcelo.tosatti () cyclades ! com>
Date:       2005-12-31 22:40:21
Message-ID: 20051231224021.GA5184 () dmt ! cnet
[Download RAW message or body]

On Fri, Dec 30, 2005 at 11:43:34PM +0100, Peter Zijlstra wrote:
> 
> From: Peter Zijlstra <a.p.zijlstra@chello.nl>

Peter,

I tried your "scan-shared.c" proggy which loops over 140M of a file
using mmap (on a 128MB box). The number of loops was configured to "5".

The amount of major/minor pagefaults was exactly the same between
vanilla and clockpro, isnt the clockpro algorithm supposed to be
superior than LRU in such "sequential scan of MEMSIZE+1" cases?

Oh well, to be sincere, I still haven't understood what makes CLOCK-Pro
use inter reference distance instead of recency, given that its a simple
CLOCK using reference bits (but with three clocks instead of one).

But thats probably just my ignorance, need to study more.


-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/
[prev in list] [next in list] [prev in thread] [next in thread]