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Re: [Xen-devel] "tcp: refine TSO autosizing" causes performance regression on Xen



On 04/15/2015 11:08 AM, Eric Dumazet wrote:
On Wed, 2015-04-15 at 10:55 -0700, Rick Jones wrote:

Have you tested this patch on a NIC without GSO/TSO ?

This would allow more than 500 packets for a single flow.

Hello bufferbloat.

Woudln't the fq_codel qdisc on that interface address that problem?

Last time I checked, default qdisc was pfifo_fast.

Bummer.

These guys do not want to change a sysctl, how pfifo_fast will magically
becomes fq_codel ?

Well, I'm not sure that it is George and Jonathan themselves who don't want to change a sysctl, but the customers who would have to tweak that in their VMs?

rick

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