On Mon Mar 18, 2002 at 06:08:17PM -0800, Linus Torvalds wrote:
>
> On Mon, 18 Mar 2002, David S. Miller wrote:
> >
> > Or maybe the program is just flawed, and the interesting 1/8 pattern comes
> > from something else altogether.
> >
> > I think the weird Athlon behavior has to do with the fact that
> > you've made your little test program as much of a cache tester
> > as a TLB tester :-)
>
> Oh, I was assuming that malloc(BIG) would do a mmap() of MAP_ANONYMOUS,
Perhaps adding an explicit
void *malloc(size_t size)
{
void *result = mmap((void *) 0, size + sizeof(size_t), PROT_READ | PROT_WRITE,
MAP_PRIVATE | MAP_ANONYMOUS, 0, 0);
if (result == MAP_FAILED)
exit(EXIT_FAILURE);
* (size_t *) result = size;
return(result + sizeof(size_t));
}
would ensure libc isn't trying to do something sneaky,
-Erik
-- Erik B. Andersen http://codepoet-consulting.com/ --This message was written using 73% post-consumer electrons-- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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