On 12/03/2016 05:21 PM, Richard Cochran wrote: > On Mon, Nov 28, 2016 at 05:04:25PM -0600, Grygorii Strashko wrote: >> This also change overflow polling period when HW_TS_PUSH feature is >> enabled - overflow check work will be scheduled more often (every >> 200ms) for proper HW_TS_PUSH events reporting. > > For proper reporting, you should make use of the interrupt. The small > fifo (16 iirc) could very well overflow in 200 ms. The interrupt > handler should read out the entire fifo at each interrupt. > huh. Seems this is not really good idea, because MISC Irq will be triggered for *any* CPTS event and there is no way to enable it just for HW_TS_PUSH. So, this doesn't work will with current code for RX/TX timestamping (which uses polling mode). + runtime overhead in net RX/TX caused by triggering more interrupts. May be, overflow check/polling timeout can be made configurable (module parameter). -- regards, -grygorii -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
