[M3devel] userthreads vs. pthreads performance?

[Dragiša Durić]

CVSup w/ user threads is not faster because user threads are faster - it
is faster because it's buggy behaviour manifests only with kernel
threads. IMO.

Algorithm-wise - at least on Linux NPTL is O(1) decision making time, ie
switching threads. User threads are lots of linear list walking. Figure
how efficient it is. Process management "science" has gone long way
since "founding fathers" did user threads thingy.

d

On Sun, 2010-03-28 at 09:58 +0000, Jay K wrote:
> I understand that userthreads don't scale across multiple processors.
> But testing out cvsup lately, things are noticably much much faster
> with user threads. At least cvsup. I haven't watched the compiler and
> such.
>  
>  
>  - Jay
> 
> 
> 
> 
> 
-- 
Dragiša Durić <dragisha at m3w.org>