On 08/25/2011 04:35 PM, Paolo Bonzini wrote: > On 08/25/2011 10:00 AM, Lai Jiangshan wrote: >>> >I was measuring with 10 readers, not 3. It makes sense to wait more with >>> >fewer readers. >> >> But my box just has 4 cores(i5 760). > > You cannot be always sure that readers are less than the cores. readers > > cores is exactly the case when busy waiting hurts most. >
It makes no sense to do a "readers > cores" *performance* rcutorture test. When "readers > cores", the kernel scheduler will mess the test up. Thanks, Lai. _______________________________________________ ltt-dev mailing list [email protected] http://lists.casi.polymtl.ca/cgi-bin/mailman/listinfo/ltt-dev
