On 17.07.2012 17:21, Eugene Grosbein wrote:
17.07.2012 06:23, Konstantin Belousov пишет:
I do not think that your 'per-cpu' counter are correct. The thread
migration or rescheduling causes the fetch or update of the wrong
per-cpu structure. This allows parallel updates with undefined
consequences.
From practical point of view, I'like to state that most of us do NOT
need scientifically exact ipfw counters values when pushing hardware to its
maximum.
Personaly, I'd like to have tunable that gives me another 15% of speed
at cost of bad ipfw counters I don't use anyway.
It seems that this can be done even with sysctl.
The same approach can be applied to per-cpu interface counters (and
global per-protocol statistics).
Eugene Grosbein
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WBR, Alexander
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