On 23 Jan 2005 13:10:21 -0000, Pankaj G <godepankaj@xxxxxxxxxxxxxx> wrote:
>
>
>
> hi all,
>
> Can anyone give me information about these things:
>
> Two variable are there, about which, i want to know:
>
> 1. loops_per_jiffy present in linux/delay.h
This is used for making delays in Kernel. There are two methods in
Linux kernel(i386)
a) Use the Time Stamp counter
b) Just use a simle loop which decrements the counter.
loops_per_jiffy holds that counter value.
> 2. boot_cpu_data present in asm/processor.h
It is simply a structure that holds CPU specfic information.
struct cpuinfo_x86 (in i386)
> If suppose i run a for loop from &loops_per_jiffy to &boot_cpu_data ,
> what all things will i get.
it is used internally by __udelay();
se i386/lib/delay.c
regards
Manish Regmi
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