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Re: Getting tired of 5.3

From: Garance A Drosihn <drosih@xxxxxxx>
Date: Tue, 14 Dec 2004 20:27:19 -0500

At 2:44 PM -0800 12/14/04, walt wrote:

I don't have any multi-processor machines (nor do I intend to buy any) but the reason (IMHO) that FreeBSD-current has suffered in The Responsiveness Wars is their approach to the SMP problem.

The Giant Kernel Lock problem has been preventing any real
progress for over a year (at least) and seems to be going
nowhere very fast.  Nobody, even ALC, seems to be able to
solve this horrible problem.

Well, I think that is overstating things a bit. Many parts of the system sped up very noticeably between 5.2-release and 5.3-release. I am not sure if "user responsiveness" has, because I (personally) do not use FreeBSD for my desktop. I use it for running some services, and for what are essentially "batch jobs".

SCHED_ULE was supposed to do a better job at user responsiveness,
but that new feature was still too unreliable for 5.3-release.
There have been many fixes to SCHED_ULE since then (only done in
6.x-current for now), but again I can't say how well it works wrt
user responsiveness.

I think it is not accurate to say things are "going nowhere".

Garance Alistair Drosehn            =   gad@xxxxxxxxxxxxxxxxxxxx
Senior Systems Programmer           or  gad@xxxxxxxxxxx
Rensselaer Polytechnic Institute    or  drosih@xxxxxxx

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