On Thu, May 14, 2015 at 2:36 AM, Len Brown <[email protected]> wrote: >> [ 2.737884] x86: Booted up 4 nodes, 120 CPUs
> For the record, the same (bare metal) box running latest tip boots > 10ms/processor quicker > [ 1.553658] x86: Booted up 4 nodes, 120 CPUs > BTW. this time can be reduced by 7% (113 ms) by deleting announce_cpu(): > > [ 1.445815] x86: Booted up 4 nodes, 120 CPUs I see that the x2apic optimization has been reverted from TIP. So just for grins, I booted the same box with all the udelays in smpboot.c removed, and it speed up boot by only 12ms (0.8%) total: [ 1.432946] x86: Booted up 4 nodes, 120 CPUs 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 [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
