[Development] Mutex future directions
CarstenBreuerQt at textwork.de
Wed May 23 23:44:57 CEST 2012
thanks for clearing this :-)
>> I guess it depends a bit on if you want to yield to another thread or
>> not ;-). Of course: burning cpu time is another way to solve this ;-)
> According to the Intel manual, if you *don't* yield and you don't have the
> PAUSE instruction, you may make things worse.
What do you exactly mean with a PAUSE instruction. Is this a assembler
> For one thing, if you don't yield, the processor will continue executing your
> code, without giving a chance for other processes to run. There's no guarantee
> even in a multiprocessor system that the other thread is running. And even if
> it's running, if it was scheduled to another thread on the same hyperthreaded
> core, the processor may not execute the that thread because this thread still
> has instructions to execute.
Interesting. Wouldn't it be better to change YieldCurrentThread?
I guess, most of us are not aware of this and some of us
learned in the 386 century that give back CPU performance to the OS is
always a good thing. I guess it is even nowadays a good thing on single
core machines. Isn't it?
Thanks and Best Regards,
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