On Thu, Nov 08, 2007 at 11:16:33AM -0800, Christoph Lameter wrote: > On Thu, 8 Nov 2007, Matt Mackall wrote: > > > > I cannot figure out what the number of cycles currently showing on the TSC > > > have to do with a ratio :(. I could semi-understand if we were counting up > > > how many cycles were being spent trying to pack objects but that does not > > > appear to be the case. The comment didn't help a whole lot either. It felt > > > like a cost for packing, not a ratio > > > > It's just a random number generator. And a bad one: lots of arches > > return 0. And I believe at least one of them has some NUMA support. > > Do we have a better one? Something with minimal processing overhead? I'd > be glad to switch it.
Not really. drivers/char/random.c does: __get_cpu_var(trickle_count)++ & 0xfff for a similar purpose. -- Mathematics is the supreme nostalgia of our time. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
