Messages in this thread | | | From | "Dan Maas" <> | Subject | Re: about time-slice | Date | Thu, 19 Oct 2000 19:48:29 -0400 |
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> I have a question about the time-slice of linux, how do I know it, or how > can I test it?
First look for the (platform-specific) definition of HZ in include/asm/param.h. This is how many timer interrups you get per second (eg on i386 it's 100). Then look at include/linux/sched.h for the definition of DEF_COUNTER. This is the number of timer interrupts between mandatory schedules. By default it's HZ/10, meaning that the time-slice is 100ms (10 schedules/sec). (of course the interval could be longer if kernel code is hogging the CPU; the scheduler won't run until the process leaves the kernel or sleeps explicitly...)
Experts, please correct me if I'm wrong.
Regards, Dan
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