On Thu, May 14, 2015 at 2:44 AM, Ingo Molnar <mi...@kernel.org> wrote:
> >> BTW. this time can be reduced by 7% (113 ms) by deleting >> announce_cpu(): >> >> [ 1.445815] x86: Booted up 4 nodes, 120 CPUs > > so that kind of info looks pretty useful, especially when there's > hangs/failures. I think the messages we print on failure are useful. I think the success case should be a 1-line summary. > I'm wondering what takes 113 msecs to print 120 CPUs - > that's about 1 msec per a few chars of printk produced, seems > excessive. Do you have any idea what's going on there? Does your > system print to a serial console perhaps? Yes, serial console -- that server is actually much closer to you than it is to me, it is in Finland:-) I should benchmark it, because 115200 should be faster... cheers, Len Brown, Intel Open Source Technology Center -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
