mutex error while throttling down a phenom CPU

[Joerg Bergmann]

Thanks, have implemented those makros into BGMN. In principle, Linux
should have a better multithreading compared to Windows, time to request
plus release a mutex:
WIN 3300ns Linux 1200ns

But why the hell is WIN better in those macros:
WIN InterlockedDecrement 64ns
LINUX (((int)AO_fetch_and_sub1(...))-1) 256ns
Bad implementation?

Phenom 2,4GHz,
Windows XP x86: Watcom 1.7a
Fedora 9 x86: gcc 4.3.0 with -O3

Joerg Bergmann

Kevin Kofler schrieb:
> Joerg Bergmann wrote:
>> Thanks. I do not need atomic counters. I need only the counter to be set
>> to its new value before setting the boolean. But, as I have learned
>> from parallel programming: If one needs atomic counters, he mostly needs
>> atomic increase-and-check or atomic decrease-and-check. But that
>> functions seem not to be provided by atomic.h. Are they provided
>> elsewhere? Simple atomic increases or atomic decreases are without
>> need, in most cases.
> 
> http://gcc.gnu.org/onlinedocs/gcc-4.3.2/gcc/Atomic-Builtins.html
> 
>         Kevin Kofler
>