On Tuesday 26 August 2008 06:15, Gregory Haskins wrote: > git-id c4acb2c0669c5c5c9b28e9d02a34b5c67edf7092 attempted to limit > newidle critical section length by stopping after at least one task > was moved. Further investigation has shown that there are other > paths nested further inside the algorithm which still remain that allow > long latencies to occur with newidle balancing. This patch applies > the same technique inside balance_tasks() to limit the duration of > this optional balancing operation. > > Signed-off-by: Gregory Haskins <ghaskins@xxxxxxxxxx> > CC: Nick Piggin <npiggin@xxxxxxx> Hmm, this (andc4acb2c0669c5c5c9b28e9d02a34b5c67edf7092) still could increase the amount of work to do significantly for workloads where the CPU is going idle and pulling tasks over frequently. I don't really like either of them too much. Maybe increasing the limit would effectively amortize most of the problem (say, limit to move 16 tasks at most). -- To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
