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mac80211: enable collecting station statistics per-CPU

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If the driver advertises the new HW flag USE_RSS, make the
station statistics on the fast-rx path per-CPU. This will
enable calling the RX in parallel, only hitting locking or
shared cachelines when the fast-RX path isn't available.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg
2016-03-31 20:02:11 +03:00
parent 49ddf8e6e2
commit c9c5962b56
5 changed files with 142 additions and 46 deletions
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38
net/mac80211/sta_info.h
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@@ -297,6 +297,7 @@ struct ieee80211_fast_tx {
* @key: bool indicating encryption is expected (key is set)
* @sta_notify: notify the MLME code (once)
* @internal_forward: forward froms internally on AP/VLAN type interfaces
* @uses_rss: copy of USES_RSS hw flag
* @da_offs: offset of the DA in the header (for header conversion)
* @sa_offs: offset of the SA in the header (for header conversion)
* @rcu_head: RCU head for freeing this structure
@@ -311,7 +312,8 @@ struct ieee80211_fast_rx {
u8 icv_len;
u8 key:1,
sta_notify:1,
internal_forward:1;
internal_forward:1,
uses_rss:1;
u8 da_offs, sa_offs;
struct rcu_head rcu_head;
@@ -367,6 +369,21 @@ struct mesh_sta {
DECLARE_EWMA(signal, 1024, 8)
struct ieee80211_sta_rx_stats {
unsigned long packets;
unsigned long last_rx;
unsigned long num_duplicates;
unsigned long fragments;
unsigned long dropped;
int last_signal;
u8 chains;
s8 chain_signal_last[IEEE80211_MAX_CHAINS];
u16 last_rate;
struct u64_stats_sync syncp;
u64 bytes;
u64 msdu[IEEE80211_NUM_TIDS + 1];
};
/**
* struct sta_info - STA information
*
@@ -428,6 +445,8 @@ DECLARE_EWMA(signal, 1024, 8)
* the BSS one.
* @tx_stats: TX statistics
* @rx_stats: RX statistics
* @pcpu_rx_stats: per-CPU RX statistics, assigned only if the driver needs
* this (by advertising the USES_RSS hw flag)
* @status_stats: TX status statistics
*/
struct sta_info {
@@ -448,6 +467,7 @@ struct sta_info {
struct ieee80211_fast_tx __rcu *fast_tx;
struct ieee80211_fast_rx __rcu *fast_rx;
struct ieee80211_sta_rx_stats __percpu *pcpu_rx_stats;
#ifdef CONFIG_MAC80211_MESH
struct mesh_sta *mesh;
@@ -477,21 +497,7 @@ struct sta_info {
long last_connected;
/* Updated from RX path only, no locking requirements */
struct {
unsigned long packets;
unsigned long last_rx;
unsigned long num_duplicates;
unsigned long fragments;
unsigned long dropped;
int last_signal;
u8 chains;
s8 chain_signal_last[IEEE80211_MAX_CHAINS];
u16 last_rate;
struct u64_stats_sync syncp;
u64 bytes;
u64 msdu[IEEE80211_NUM_TIDS + 1];
} rx_stats;
struct ieee80211_sta_rx_stats rx_stats;
struct {
struct ewma_signal signal;
struct ewma_signal chain_signal[IEEE80211_MAX_CHAINS];