On 05/28/2014 02:00 PM, Marco van de Voort wrote:
In that case some attention points: - help implementing and testing fine grained timings on *nix. Now it only has a special case for linux. - Seems high precision is not used on anything but x86. - Is rdtsc safe for CPUs that can vary clock of cores independently like Core Mono? What if the process changed CPU to a different clocked core?
While I of course see you point, besides high resolution, another benefit of EpikTimer (at least on X86) is low overhead access to a time source. And this is what makes it useful for my needs.
Already the current version on X86 (at least on Linux 32 bit) it uses the appropriate ASM instruction: Perfect (but supposedly some testing regarding the safety issue you state).
I suppose on any arch Linux vDSO could be used to provide both lowest possible overhead and highest possible resolution. So this is what I will try to do some day soon.
-Michael _______________________________________________ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
