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]
1707.00 15.7% ieee80211_tx_status [mac80211]
1192.00 11.0% intel_idle [kernel]
462.00 4.3% __ieee80211_recalc_idle [mac80211]
414.00 3.8% ieee80211_prepare_and_rx_handle [mac80211]
240.00 2.2% dev_queue_xmit_nit [kernel]
199.00 1.8% ieee80211_rx [mac80211]
154.00 1.4% ieee80211_find_sta_by_ifaddr [mac80211]
124.00 1.1% read_hpet [kernel]
101.00 0.9% _raw_spin_lock_irqsave [kernel]
92.00 0.8% __netif_receive_skb [kernel]
80.00 0.7% tg_load_down [kernel]
76.00 0.7% fget_light [kernel]
75.00 0.7% ieee80211_propagate_queue_wake [mac80211]
75.00 0.7% memcpy [kernel]
71.00 0.7% __ieee80211_stop_queue [mac80211]
70.00 0.6% ipt_do_table [kernel]
66.00 0.6% csum_partial_copy_generic [kernel]
65.00 0.6% datagram_poll [kernel]
63.00 0.6% _raw_spin_lock_bh [kernel]
61.00 0.6% ath_get_rate [ath9k]
49.00 0.5% ieee80211_subif_start_xmit [mac80211]
48.00 0.4% tcp_poll [kernel]
Thanks,
Ben
--
Ben Greear <greearb@xxxxxxxxxxxxxxx>
Candela Technologies Inc http://www.candelatech.com
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