Re: [LUG] Interesting diagnostic problem

[John Daragon <john@xxxxxxxxxx>]

Robin Cornelius wrote:
> Robin Cornelius wrote:
>
> > I will have to lookup what i did at work and post it, but it uses an 
> > inline asembler call to access the CPU clock count register directly.  
>
> Here it is :-
>
> #define PSCHED_GET_TIME(stamp) ({u32 hi, lo; __asm__ __volatile(".byte 
> 0x0f,0xa2"); __ asm __volatile(".byte 0x0f,0x31" : "=a" (lo), "=d" 
> (hi)); (stamp)=(((u64)hi<32)+lo);});
>
> and to use it :-
>
>
> u64 start,end;
> long time;
>
> PSCHED_GET_TIME(start);
> mdelay(1);
> PSCHED_GET_TIME(end);
> time=end-start;
> printk("There are %ld clocks per ms\n",time);

Robin, hi;

Excellent, thanks.  That's just the sort of thing I was looking for !

jd
--

John Daragon                                          john@xxxxxxxxxx
argv[0] limited
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