On 08/13/13 17:51, Julian Elischer wrote:
> On 8/14/13 1:37 AM, Navdeep Parhar wrote:
>> On 08/13/13 10:29, Julian Elischer wrote:
>> ..
>>> Has anyone done any work on aggregating ACKs, or delaying responding to
>>> them?
>> If LRO is enabled on the FreeBSD receiver, ACKs are already aggregated
>> (a duplicate ACK will result in an immediate flush though.)  See
>> tcp_lro_rx.
> not always, , certainly not with XEN (xn0) on EC2.

It will vary from driver to driver and how many frames a driver gets to
(or chooses to) process in one run of its interrupt handler.
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