Re: [RFC PATCH] net: add additional lock to qdisc to increase enqueue/dequeue fairness

Andi Kleen
2010-03-24T02:12:19Z

David Miller <davem@davemloft.net> writes:

> From: Alexander Duyck <alexander.h.duyck@intel.com>
> Date: Tue, 23 Mar 2010 13:25:53 -0700
>
>> The qdisc layer shows a significant issue when you start transmitting from
>> multiple CPUs.
>
> Why are you hitting any central qdisc lock on a multiqueue
> configuration?

One thing to remember is that systems can have a lot more CPUs than a NIC queues
(e.g. 64 vs 8)

-Andi

--
ak@linux.intel.com -- Speaking for myself only.