cvs commit: src/lib/libthr/thread thr_mutex.c src/lib/libkse/thread thr_mutex.c src/include pthread.h

[David Xu]

Kris Kennaway wrote:
<snip>

>> My last commit improves mysql select-smack benchmark on 4-core xeon from
>> 48000 queries/s to 70000 queries/s, so my work is alternative way
> 
> No, that is an orthogonal issue that (after measurement) does not solve 
> the same problem that is addressed by this change.  I'd be happy to 
> discuss it with you in more detail if you are interested.  We could also 
> discuss the fact that super-smack is a questionable target to be 
> optimizing because the main performance problems seem to be from a very 
> poor benchmark design.
> 
> I claim that real-world applications do not commonly do I/O in units of 
> 1 byte :)

I'd rather to believe it is scheduling problem, spin loops does not help
it, but sched_yield() loops does help it a lot.