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For a typical vsync locked application running at 60fps, sampling at just under twice a frame doesn't seem to give very stable lists of relevent hardware units because there are a number of units involved that may not be sampled one second to the next. This bumps the sample rate to 10,000 instead which is ~ 170 samples per frame so we tend to hit all the units involved. It also changes the report threshold to a sample count >= 1, so you don't see as many units with a percentage of 0. Signed-off-by: Eric Anholt <eric@anholt.net>