RE: Performance drop on Baytrail with 4.5-rc2

From: Thomas Voegtle
Date: Sun Mar 13 2016 - 12:03:11 EST

On Wed, 3 Feb 2016, Longepe, Philippe wrote:

Hi Thomas,

Thank you for sharing this test. I just did a quick test and yes this is really interesting !

Without the scale option, the load is close to 100% for each cpus (so the pstates are increasing up to the turbo frequency) but with scale=320:208, the load is oscillating (close to 50% in average), so the requested frequencies are lower (the power is also reduced).

I have a patch (not yet submitted) that reduce the gap for such a use case.


may I ask you where this patch stays? I have seen nothing in Linus' tree, that fixes that performance drop?