> > > But this leaves open the issue that querying the device too often will > > > prevent it from going into autosuspend. It seems to me that the best > > > way to deal with this is to make sure that the autosuspend timeout is > > > shorter than the interal between queries, not to make the querying > > > conditional on !runtime_auto. > > > > Short autosuspend timeout can affect performance. For instance our > experiments showed that > > shorter than 10sec timeout made Ethernet performance degrade because > of wakeup delays. > > So, just putting shorter timeout may have some side effects. > > Sure. This just means that you need a long statistics interval -- > longer than the autosuspend timeout. That's why I suggested making the > interval adjustable. What do you mean statistics interval? Interval calling ndo_get_stats64 or another thread/timer or else getting statistics? Thanks. Woojung -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
