Re: RFC: issues concerning the next NAPI interface

From: Rick Jones
Date: Fri Aug 24 2007 - 13:09:37 EST


Just to be clear, in the previous email I posted on this thread, I
described a worst-case network ping-pong test case (send a packet, wait
for reply), and found out that a deffered interrupt scheme just damaged
the performance of the test case. Since the folks who came up with the
test case were adamant, I turned off the defferred interrupts. While defferred interrupts are an "obvious" solution, I decided that they weren't a good solution. (And I have no other solution to offer).

Sounds exactly like the default netperf TCP_RR test and any number of other benchmarks. The "send a request, wait for reply, send next request, etc etc etc" is a rather common application behaviour afterall.

rick jones
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