On Mon, Nov 09, 2015 at 11:56:51AM +0000, Punit Agrawal wrote: > Jacob Pan <jacob.jun....@linux.intel.com> writes: > > My take is that RT and throttling will never go well together since they > > are conflicting in principle. > > I am not sure I follow. If RT (or other higher priority classes) can't > be throttled then the CPUs are not able to contribute towards > constraining power consumption and hence temperature. > > This is especially true in certain platforms where tasks belong to the > RT class to maintain user experience, e.g., audio and video.
Audio/Video playback generally doesn't take a _lot_ of time these days. What is important though is _when_ it happens. And media playback typically already has a very well defined and stable cadence (24Hz or whatnot). What you want is for your idle injector to sync up with that, not disrupt it. For other workloads, missing a deadline is about as bad as destroying the chip, complete system shutdown might be safer than getting delayed. (The very tired scenario of a saw, a laser and your finger; you want to shut down the entire machine rather than just cut off your finger.) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
