Re: [Xen-devel] Recent trace patch not arch-neutral

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

>  #ifdef x86
>         rdtscll(rec->cycles);
>  #endif
>  #ifdef IA64
>         __asm__ __volatile ("mov %0=ar.itc;;" : "=r"(rec->cycles) :: 
> "memory");
>  #endif
>
>  Dan, perhaps you know the nice clean way of doing this sort of thing?
Okay, let's define the Linux function get_cycles() in 
include/asm/time.h. So common code can then get at that generic 
function by including <xen/time.h>. I don't much care for the cycles_t 
definition but I guess we may as well pull that in as well. Then 
trace.c can cast to u64 when writing the stamp into the trace record.
 -- Keir


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