Re: Pthreads performance

Maxim Sobolev wrote:
> Hi,
> 
> Note: I am purposely posting this to developers to avoid banging into 
> "FreeBSD 5/6 is slow" drum. My pthreads knowellege is pretty basic, so 
> that it's possible that this all is false alarm.

Grrr, e-mail auto-completion suxxxor. :-/

-Maxim

> 
> I've found a post on some of Russian technical forums in which author 
> tries to compare performance of basic synchronisation primitives in 
> various threading packages available on FreeBSD. The interesting part is 
> that the linuxthreads clearly wins by a high margin - difference between 
> it and the next follower (kse) is almost 3x. I had tried to find some 
> error in the program logic, but failed. Another interesting thing is 
> that libthr, which is conceptually very close to linuxthreads, provides 
> worst result, being 8x slower than LT and almost 3x slower than kse/c_r.
> 
> For those who can read Russian the original post can be found here: 
> http://www.opennet.ru/base/sec/test_freebsd_threads.txt.html
> 
> Following is result of the run on my 5.3-STABLE/UP.
> 
> -bash-2.05b$ time ./aqueue_c_r -n 10000000
> pusher started
> poper started
> 
> real    0m17.826s
> user    0m17.766s
> sys     0m0.048s
> -bash-2.05b$ time ./aqueue_thr -n 10000000
> pusher started
> poper started
> 
> real    0m46.227s
> user    0m18.706s
> sys     0m27.423s
> -bash-2.05b$ time ./aqueue_kse -n 10000000
> pusher started
> poper started
> 
> real    0m15.477s
> user    0m15.432s
> sys     0m0.009s
> -bash-2.05b$ time ./aqueue_linuxthreads -n 10000000
> pusher started
> poper started
> 
> real    0m6.118s
> user    0m2.217s
> sys     0m0.932s
> -bash-2.05b$
> 
> Test case and script that compiles it can be found there:
> 
> http://www.portaone.com/~sobomax/aqueue.c
> http://www.portaone.com/~sobomax/build.sh
> 
> -Maxim
> _______________________________________________
> freebsd-current_at_freebsd.org mailing list
> http://lists.freebsd.org/mailman/listinfo/freebsd-current
> To unsubscribe, send any mail to "freebsd-current-unsubscribe_at_freebsd.org"
> 
> 
>