From e8306f989483e4b97a8b37dd268de6c8c6f35e75 Mon Sep 17 00:00:00 2001 From: Vivek Natarajan Date: Wed, 6 Apr 2011 11:41:10 +0530 Subject: mac80211: Check for queued frames before entering power save. In a highly noisy environment, the tx rate of the driver drops and the application slows down since it has not yet received ACKs for the frames already queued in the hardware. Since this ACK may take more than 100ms, stopping the dev queues for entering PS at this stage breaks applications, WMM test cases in my testing. If there are frames already pending in the tx queue, postponing the PS logic helps to avoid redundant queue stops. When power save is enabled by default and in a noisy environment, this API certainly helps in improving the average throughput. Signed-off-by: Vivek Natarajan Signed-off-by: John W. Linville --- net/mac80211/driver-trace.h | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) (limited to 'net/mac80211/driver-trace.h') diff --git a/net/mac80211/driver-trace.h b/net/mac80211/driver-trace.h index 45aab80738e2..c8c934d48b7a 100644 --- a/net/mac80211/driver-trace.h +++ b/net/mac80211/driver-trace.h @@ -74,6 +74,21 @@ TRACE_EVENT(drv_return_int, TP_printk(LOCAL_PR_FMT " - %d", LOCAL_PR_ARG, __entry->ret) ); +TRACE_EVENT(drv_return_bool, + TP_PROTO(struct ieee80211_local *local, bool ret), + TP_ARGS(local, ret), + TP_STRUCT__entry( + LOCAL_ENTRY + __field(bool, ret) + ), + TP_fast_assign( + LOCAL_ASSIGN; + __entry->ret = ret; + ), + TP_printk(LOCAL_PR_FMT " - %s", LOCAL_PR_ARG, (__entry->ret) ? + "true" : "false") +); + TRACE_EVENT(drv_return_u64, TP_PROTO(struct ieee80211_local *local, u64 ret), TP_ARGS(local, ret), @@ -964,6 +979,11 @@ TRACE_EVENT(drv_get_ringparam, ) ); +DEFINE_EVENT(local_only_evt, drv_tx_frames_pending, + TP_PROTO(struct ieee80211_local *local), + TP_ARGS(local) +); + DEFINE_EVENT(local_only_evt, drv_offchannel_tx_cancel_wait, TP_PROTO(struct ieee80211_local *local), TP_ARGS(local) -- cgit v1.2.3