Hi...another one odd question.... The tick rate is defined in the 2.6 kenrnel in 1 ms... so the time of the system is updated every 1 ms... I want to know why some time-related structs have fields about nanoseconds and how the kernel can keep such an accuracy (nanoseconds)?? __________________________________ Do you Yahoo!? Yahoo! Mail - 250MB free storage. Do more. Manage less. http://info.mail.yahoo.com/mail_250 -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/