Subject: Re: Thread benchmarks
To: Andrew Doran <>
From: Adam Hamsik <>
List: tech-kern
Date: 09/28/2007 21:25:11
Hash: SHA1

On Sep 28, 2007, at 7:50 PM, Andrew Doran wrote:

> Back in March I posted some MySQL benchmarks after we switched to a  
> 1:1
> threading model in -current *. I've spent a lot of time tuning the  
> pthread
> library so I thought I'd post a followup. The original benchmark  
> that I used
> (supersmack) now performs much better on -current that it did a few  
> months
> ago, so I picked something else this time: MySQL sysbench.
> Most of the sysbench runs that I've seen to date have sysbench  
> running on
> the same machine as the database. That's a good test but with the  
> exception
> of small installations and out-of-band activity, production setups  
> rarely
> look like that. So I ran sysbench itself on a seperate dual core  
> system.
> Here are the results, comparing NetBSD 3 with NetBSD-current:
> And NetBSD-current compared to other systems:
Wow your numbers are impressive :). I like your work.

> Note this is stock NetBSD-current with FreeBSD's malloc()  
> (jemalloc) in
> libc. I'll be merging that some time soon.
> With the vmlocking CVS branch and Mindaugas' new scheduler NetBSD  
> peaks
> around 500 TPS. There is a very gradual fall off in the number of TPS
> achieved as the number of connections begins to ramp up. I suspect  
> that
> could be due to a weakness somewhere in the network stack, so I'm  
> hopeful
> that a bit of time spent profiling with large numbers of  
> connections could
> yield good results.


> Thanks,
> Andrew
> *

- -----------------------------------------
Adam Hamsik
icq: 249727910

Proud NetBSD user.

We program to have fun.
Even when we program for money, we want to have fun as well.
~ Yukihiro Matsumoto

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