On Wed, Jan 25, 2012 at 11:15:36PM +0530, Raghavendra K T wrote: > On 01/25/2012 10:05 PM, Konrad Rzeszutek Wilk wrote: > >>So it seems we have worst case overhead of around 8%. But we see > >>improvement of at-least 15% once when little more time is spent in > >>critical section. > > > >Is this with collecting the histogram information about spinlocks? We found > >that if you enable that for production runs it makes them quite slower. > > > > Ok. Are you referring to CONFIG_KVM_DEBUG_FS/CONFIG_XEN_DEBUG_FS?. Not
Those were the ones. > it was not enabled. But then may be I was not precise. This test was > only on native. So it should have not affected IMO. Yup. > > It is nice to know that histogram affects, since I was always under the > impression that it does not affect much on guest too. My experiments > had almost always enabled that. > > Let me know if you referred to something else.. _______________________________________________ Virtualization mailing list Virtualization@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/virtualization
