On Thu, 14 Nov 2002, Borja Marcos wrote:

>       Looking at the kernel sources, I see that in /usr/src/sys/i386/i386/trap.c,
>
> --- snip
>
>     /*
>      * note: PCPU_LAZY_INC() can only be used if we can afford
>      * occassional inaccuracy in the count.
>      */
>     PCPU_LAZY_INC(cnt.v_syscall);
>
> --- snip
>
>       This seems to be a macro to update a per-CPU variable. But, AFAIK, there is
> *only* one variable now. Is it correct?
>
>       The ia64 version (/usr/src/sys/ia64/ia64) happily updates this variable:
> ...

This part is a bug in the ia64 version (in fact, in all non-i386 arches for
syscall() and in all arches for many other statistics): PCPU_LAZY_INC() is
only deployed for 1 variable on 1 arch so far.  (See an earlier reply for
how to unbreak the deployed case.)

Bruce


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