On 2010-10-09 2:17 PM, Helmut Schaa wrote: > Am Samstag 09 Oktober 2010 schrieb Felix Fietkau: >> Using these, user space can calculate a relative channel utilization >> with arbitrary intervals by regularly taking snapshots of the survey >> results. > > What if you've got multiple consumers, wouldn't that mess up the > survey results? > > I mean, for example mac80211 and/or hostapd might want to use the busy time > statistics for the BSS load IE while a different userspace process might > want to monitor the channel utilization in order to detect a worsening > channel condition. > > If the consumers happen to use the same interval and request the survey > very soon after each other one consumer will get the values on a nice (close > to the query interval) time base while the other one will get the values > based on a very small interval (which might lower the value's > representativeness). Multiple consumers work just fine, since the survey results are relative to the time the hardware started using the channel, not relative to the last request. Maybe my description was a bit unclear on that part. - Felix -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
