Hi, > Is it possible to use "jiffies" in user space? You can use /proc/uptime . http://lxr.linux.no/source/fs/proc/proc_misc.c?v=2.4.28#L120 http://lxr.linux.no/source/fs/proc/proc_misc.c#L98 -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/