[Box Backup-dev] Current status

[Jonathan Morton]

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>>> C++ and pthreads work perfectly well on Linux, any recent  
>>> Solaris,  and I
>>> can't imagine they don't work on *BSD.
>>
>> Used to not work on OpenBSD and NetBSD. Hopefully it's fixed now,  
>> but  I think some of the archs are still dodgy.
>
> We have had big problems on *BSD with threads while in general we  
> use pthreads
> heavily on Linux, Solaris and HP-UX.

Worth noting is that MacOS X (a FreeBSD descendant) has very poor  
context-switching performance, including between threads in the same  
process.  This shows up as a marked decrease in application  
performance when the number of active threads exceeds the number of  
CPUs.

Linux is streets ahead in this matter, even without NPTL (Native  
POSIX Threads for Linux).  However, I've seen nothing to suggest that  
threading is actually *broken* on any particular OS that I've had  
contact with, aside from Classic MacOS.

--------------------------------------------------------------
from:     Jonathan "Chromatix" Morton
mail:     chromi@chromatix.org.uk
website:  http://www.chromatix.uklinux.net/
tagline:  The key to knowledge is not to rely on people to teach you it.



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