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

From: Andi Kleen <[email-masked]>
Date: Wed, 24 Mar 2010 03:12:12 +0100

David Miller <[email-masked]> writes:

> From: Alexander Duyck <[email-masked]>
> 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

-- 
[email-masked] -- Speaking for myself only.