Subject: Re: Thread benchmarks
To: Kris Kennaway <>
From: Darren Reed <>
List: tech-kern
Date: 10/02/2007 02:16:15
Kris Kennaway wrote:
> Andrew Doran wrote:
>>> In tests that have been run on p4 hardware, the FreeBSD system's graph
>>> looks more like NetBSD's than the one presented here.  FreeBSD's kernel
>>> has a lot of debugging options that hurt performance on by default. 
>>> Also,
>>> FreeBSD's malloc defaults to 'AJ' in head, which would result in reduced
>>> performance.
>> I can try turning off debugging in the allocator. What else would you
>> like
>> me to try? I would like to provide remote access to the two systems but
>> unfortunatley my Internet link is unreliable and I'm not in a position to
>> leave them on 24x7. Some details on the test. I grabbed my.cnf from Jeff
>> Roberson's weblog:
> You should rebuild malloc with MALLOC_PRODUCTION defined (edit
> lib/libc/stdlib/malloc.c) as well as making sure that either
> /etc/malloc.conf is removed or symlinked to 'aj'.  This is pretty
> important.

When does this get turned on for normal FreeBSD builds?
Just those that are "releases" (vs current)?