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Hi -
On Tue, Mar 22, 2005 at 03:13:17PM +0000, Baruch Even wrote:
[...] In the test with the probes I only get the cwnd up to about 3000, with a round trip of 300ms and delayed acking, it means 3000*1000/300/2 = 5000 packets per second. [...] we get double the rate of ACKs which sends us to 10000 pps, at which stage the probes will probably affect behaviour significantly enough. [...]
But 10000 packets per second at 10000 clocks per packet (from your
previous message) represents only 1/30th of the raw capacity of a 3 GHz CPU. Before instrumentation, it would have been 1/60th or so.
It's strange that this 1/60th difference is enough to bog your test down.
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