On 8/17/05, John Que <qwejohn@xxxxxxxxx> wrote: > Hello, > My question is : I want ot know wether changing HZ on 2.6 kernels is > possible only > throgh changing HZ in include/asm/param.h, or it can be > done in run time by changing something under /proc ? No, you cannot just change it in param.h and hope it works. It is far more complicated than that. If you are using a recent 2.6 (since .12, I believe), CONFIG_HZ exists, which allows you, at compile-time, to select between 100, 250 or 1000 as the HZ value. There is currently no interface, or attempt at an interface to make HZ run-time configurable. Dynamic-tick allows the kernel to modify the timer rate internally, you may try that out (not in mainline, find the patch on LKML). Allowing a user to change HZ at run-time would require some massive changes to the kernel, IMHO. Thanks, Nish -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
