How much time is required for proecessing the timer interrupt ?

[Pawan Singh]

Hi,   We are using RedHat 6.0 kernel as the embedded kernel. Only interrupt enabled is "timer (1)" and "ethernet (14)". We are using AMD SC400 chip.   The following piece of code takes 4 seconds to execute with interrupts turned on:   for (i=1; i<10000; i++) {       double x = 3.4;       double y = 5.67       double z = x + y; }   If I surround this code with cli and sti (interrupts disabled) it takes 9000 microseconds.   When I do cat /proc/interrupts, I only see interrupts going up for "timer" (once every millisecond) and ethernet once in a while.   Does linux kernel spend a lot of time processing timer interrupts? What is the normal timer interrupt duration on a pentim based workstation? Where can I modify this parameter in the kernel source code?     Thanks Pawan [EMAIL PROTECTED]