Hi and thanks for the answers, This feature seems to be a compiler intrinsic at least in the Intel C > compiler. We don't have anything similar, so you have to fall back either > to an asm procedure or a line of inline assembler. The compiler is also > not doing an optimization similar to this. Free Pascal's inline assembler > supports the PAUSE instruction though. > > good to know that.
> But unless you plan to use this in a multithreaded spinloop because you're > loading multiple cores of the CPU, it's better to let the operating system > handle the wait. This instruction is certainly not the way to fix a "my > app uses 100% CPU" scenario, just saying. > > Charlie I am currently investigating the use of this instruction in my kernel. I have wait-loops when accessing shared resources in a multicore system so that could be a place to use it. Also, I have situations in which the core just spends time in a loop so this instruction may help to reduce energy consumption. All this work is however very experimental. Matias
_______________________________________________ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
