hi jiffies is global variable that holds the number of ticks that have occured after the system has booted. On each timer interrupt the value of this variable is increased by 1. HZ gives the frequency of system timer. It is basically the tick rate. jiffies and HZ are related in the sense that if there are HZ timer interrupts in a second, there are HZ jiffies in a second. jiffies variable is defined in linux/jiffies.h while HZ is defined in include/asm/param.h regards sanjay -----Original Message----- From: kernelnewbies-bounce@nl.linux.org [mailto:kernelnewbies-bounce@nl.linux.org]On Behalf Of linux lover Sent: Saturday, May 15, 2004 12:24 PM To: kernelnewbies@nl.linux.org Subject: what is jiffies? hi friends, i am new to linux development. i wan to know what are jiffies and why it is used? Also i want to know what is HZ in kernel? Thanking you. linux_lover __________________________________ Do you Yahoo!? SBC Yahoo! - Internet access at a great low price. http://promo.yahoo.com/sbc/ -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/ Disclaimer: This message and any attachment(s) contained here are information that is confidential,proprietary to HCL Technologies and its customers, privileged or otherwise protected by law.The information is solely intended for the individual or the entity it is addressed to. If you are not the intended recipient of this message, you are not authorized to read, forward, print,retain, copy or disseminate this message or any part of it. If you have received this e-mail in error, please notify the sender immediately by return e-mail and delete it from your computer. -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
