On Tue, 2016-05-24 at 13:50 +0000, David Laight wrote: > From: Jesper Dangaard Brouer > > Sent: 20 May 2016 18:50 > ... > > If would be cool if you could run a test with removed busylock and > > allow HTB to bulk dequeue. > > (Without having looked ....) > Could you have two queues and separate queue and dequeue locks. > > The enqueue code would acquire the enqueue lock and add the packet > to the first queue. > > The dequeue code would acquire the dequeue lock and try to remove > a packet from the 2nd queue, if nothing present it would acquire > the enqueue lock and move the entire 1st queue to the 2nd queue. > > The obvious downside is two lock/unlocks for single packet dequeue. > If you can guarantee a single dequeue thread the 2nd lock isn't needed. >
Not with HTB or any 'complex' qdisc hierarchy, where we have many 'queues' and strict limits (packets per qdisc)
