In our previous episode, Michael Schnell said: > On 05/28/2014 05:41 PM, Marco van de Voort wrote: > > . But that means you need to use OS timing functions, and not ASM. > > Meaning either syscalls or vDSO. > > As in Linux syscalls do a usermode->Kernelmode->usermode switch, they > introduce a huger overhead.
Maybe, but is that relevant? We were talking about precision, not speed. > In Windows I suppose syscalls usually are not done directly by the rtl, No. Windows calls kernel32/user32, which then mostly calls nt.dll functions to do the actual syscalls afaik. And a lot more is userland on Windows. _______________________________________________ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
