FYI: Beside the patch from Dave in #23: https://bugs.debian.org/cgi-bin/bugreport.cgi?att=1;bug=1020321;filename=elapsed-time.diff;msg=23 I'm trying to fix the issue by improving the time granularity of the Linux kernel on hppa by a Linux kernel patch: https://patchwork.kernel.org/project/linux-parisc/patch/ZpoWGfQMJY19fOyR@p100/ ("parisc: Improve monotonic clock_gettime() resolution on SMP machines")