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Re: Optimizing performance for lots of virtual stations.

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On 03/15/2013 10:14 AM, Ben Greear wrote:
I probably should have done this first of course..but here is a 'perf top' on
the station machine (50 TCP streams transmitting on each of 50 stations,
and 78 associated-but-mostly-idle stations:

Looks like sta_info_get would be a good place to start :)


---------------------------------------------------------------------------------------------------------------------------
    PerfTop:    1890 irqs/sec  kernel:87.9%  exact:  0.0% [1000Hz cycles],  (all, 2 CPUs)
---------------------------------------------------------------------------------------------------------------------------

              samples  pcnt function                        DSO
              _______ _____ _______________________________ ______________

              2261.00 20.8% sta_info_get                    [mac80211]

Ahh, crap...I see the problem.  The 'sta->addr' is the MAC of the VAP,
so if I have 100 stations all connected to the same AP, then the hashing
is worthless and just ends up being a linear search.

Probably not going to be fun to fix that!

Ben

--
Ben Greear <greearb@xxxxxxxxxxxxxxx>
Candela Technologies Inc  http://www.candelatech.com

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