sigsetjmp & sigaction survey

[Parmelan, Edouard]

Godmar,

> Two questions:
> 
> 1. Is anybody using kaffe on a system that does not have
sigsetjmp/siglongjmp?
NCR MP-RAS have sigsetjmp/siglongjmp
> 
> 2. Is anybody using kaffe on a system that does not support sigaction?
NCR MP-RAS have sigaction

> The reason I'm asking is because Pat wrote an optimized version of
> jthreads that uses sigsetjmp and avoids saving the signal state in many
> cases where we switch threads.  On FreeBSD, this cuts thread switching 
> time from 1400 to 450 cycles, and we may be able to go down to 180 cycles,
> as measured from Java.
Magic :)

> Now why we would optimize thread switching when the rest of kaffe
> still sucks so much, don't ask.  The answer is:  research.
The answer is: better kaffe

Edouard.