Hi,
I was noticing some pretty big run to run variations on single threaded
benchmarks, and I've isolated it cpuidle issues. If I look at
the cpuidle tracepoint, I notice we only go into the snooze state.
Do we have any known bugs in cpuidle at the moment?
While looking around, I also noticed PM_QOS_CPU_DMA_LATENCY,
which seems like a bad thing for us. It is used in places like
the e1000e adapter:
drivers/net/ethernet/intel/e1000e/netdev.c:
pm_qos_add_request(&adapter->pm_qos_req, PM_QOS_CPU_DMA_LATENCY
Seems like that would force us into SMT8 mode all the time. Can we
disable it on ppc64le completely?
Anton
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