mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-20 06:08:08 +00:00
mac80211: merge performance improvement patches
Fix fq_codel performance issues Add a new rx function for batch processing Signed-off-by: Felix Fietkau <nbd@nbd.name>
This commit is contained in:
Felix Fietkau
parent
431b177afa
commit
3d731fc903
@ -0,0 +1,186 @@
|
||||
From: Felix Fietkau <nbd@nbd.name>
|
||||
Date: Sat, 25 Jul 2020 20:53:23 +0200
|
||||
Subject: [PATCH] mac80211: add a function for running rx without passing skbs
|
||||
to the stack
|
||||
|
||||
This can be used to run mac80211 rx processing on a batch of frames in NAPI
|
||||
poll before passing them to the network stack in a large batch.
|
||||
This can improve icache footprint, or it can be used to pass frames via
|
||||
netif_receive_skb_list.
|
||||
|
||||
Signed-off-by: Felix Fietkau <nbd@nbd.name>
|
||||
---
|
||||
|
||||
--- a/include/net/mac80211.h
|
||||
+++ b/include/net/mac80211.h
|
||||
@@ -4358,6 +4358,31 @@ void ieee80211_free_hw(struct ieee80211_
|
||||
void ieee80211_restart_hw(struct ieee80211_hw *hw);
|
||||
|
||||
/**
|
||||
+ * ieee80211_rx_list - receive frame and store processed skbs in a list
|
||||
+ *
|
||||
+ * Use this function to hand received frames to mac80211. The receive
|
||||
+ * buffer in @skb must start with an IEEE 802.11 header. In case of a
|
||||
+ * paged @skb is used, the driver is recommended to put the ieee80211
|
||||
+ * header of the frame on the linear part of the @skb to avoid memory
|
||||
+ * allocation and/or memcpy by the stack.
|
||||
+ *
|
||||
+ * This function may not be called in IRQ context. Calls to this function
|
||||
+ * for a single hardware must be synchronized against each other. Calls to
|
||||
+ * this function, ieee80211_rx_ni() and ieee80211_rx_irqsafe() may not be
|
||||
+ * mixed for a single hardware. Must not run concurrently with
|
||||
+ * ieee80211_tx_status() or ieee80211_tx_status_ni().
|
||||
+ *
|
||||
+ * This function must be called with BHs disabled and RCU read lock
|
||||
+ *
|
||||
+ * @hw: the hardware this frame came in on
|
||||
+ * @sta: the station the frame was received from, or %NULL
|
||||
+ * @skb: the buffer to receive, owned by mac80211 after this call
|
||||
+ * @list: the destination list
|
||||
+ */
|
||||
+void ieee80211_rx_list(struct ieee80211_hw *hw, struct ieee80211_sta *sta,
|
||||
+ struct sk_buff *skb, struct list_head *list);
|
||||
+
|
||||
+/**
|
||||
* ieee80211_rx_napi - receive frame from NAPI context
|
||||
*
|
||||
* Use this function to hand received frames to mac80211. The receive
|
||||
--- a/net/mac80211/ieee80211_i.h
|
||||
+++ b/net/mac80211/ieee80211_i.h
|
||||
@@ -218,7 +218,7 @@ enum ieee80211_rx_flags {
|
||||
};
|
||||
|
||||
struct ieee80211_rx_data {
|
||||
- struct napi_struct *napi;
|
||||
+ struct list_head *list;
|
||||
struct sk_buff *skb;
|
||||
struct ieee80211_local *local;
|
||||
struct ieee80211_sub_if_data *sdata;
|
||||
--- a/net/mac80211/rx.c
|
||||
+++ b/net/mac80211/rx.c
|
||||
@@ -2552,8 +2552,8 @@ static void ieee80211_deliver_skb_to_loc
|
||||
memset(skb->cb, 0, sizeof(skb->cb));
|
||||
|
||||
/* deliver to local stack */
|
||||
- if (rx->napi)
|
||||
- napi_gro_receive(rx->napi, skb);
|
||||
+ if (rx->list)
|
||||
+ list_add_tail(&skb->list, rx->list);
|
||||
else
|
||||
netif_receive_skb(skb);
|
||||
}
|
||||
@@ -3843,7 +3843,6 @@ void ieee80211_release_reorder_timeout(s
|
||||
/* This is OK -- must be QoS data frame */
|
||||
.security_idx = tid,
|
||||
.seqno_idx = tid,
|
||||
- .napi = NULL, /* must be NULL to not have races */
|
||||
};
|
||||
struct tid_ampdu_rx *tid_agg_rx;
|
||||
|
||||
@@ -4453,8 +4452,8 @@ static bool ieee80211_invoke_fast_rx(str
|
||||
/* deliver to local stack */
|
||||
skb->protocol = eth_type_trans(skb, fast_rx->dev);
|
||||
memset(skb->cb, 0, sizeof(skb->cb));
|
||||
- if (rx->napi)
|
||||
- napi_gro_receive(rx->napi, skb);
|
||||
+ if (rx->list)
|
||||
+ list_add_tail(&skb->list, rx->list);
|
||||
else
|
||||
netif_receive_skb(skb);
|
||||
|
||||
@@ -4521,7 +4520,7 @@ static bool ieee80211_prepare_and_rx_han
|
||||
static void __ieee80211_rx_handle_packet(struct ieee80211_hw *hw,
|
||||
struct ieee80211_sta *pubsta,
|
||||
struct sk_buff *skb,
|
||||
- struct napi_struct *napi)
|
||||
+ struct list_head *list)
|
||||
{
|
||||
struct ieee80211_local *local = hw_to_local(hw);
|
||||
struct ieee80211_sub_if_data *sdata;
|
||||
@@ -4536,7 +4535,7 @@ static void __ieee80211_rx_handle_packet
|
||||
memset(&rx, 0, sizeof(rx));
|
||||
rx.skb = skb;
|
||||
rx.local = local;
|
||||
- rx.napi = napi;
|
||||
+ rx.list = list;
|
||||
|
||||
if (ieee80211_is_data(fc) || ieee80211_is_mgmt(fc))
|
||||
I802_DEBUG_INC(local->dot11ReceivedFragmentCount);
|
||||
@@ -4644,8 +4643,8 @@ static void __ieee80211_rx_handle_packet
|
||||
* This is the receive path handler. It is called by a low level driver when an
|
||||
* 802.11 MPDU is received from the hardware.
|
||||
*/
|
||||
-void ieee80211_rx_napi(struct ieee80211_hw *hw, struct ieee80211_sta *pubsta,
|
||||
- struct sk_buff *skb, struct napi_struct *napi)
|
||||
+void ieee80211_rx_list(struct ieee80211_hw *hw, struct ieee80211_sta *pubsta,
|
||||
+ struct sk_buff *skb, struct list_head *list)
|
||||
{
|
||||
struct ieee80211_local *local = hw_to_local(hw);
|
||||
struct ieee80211_rate *rate = NULL;
|
||||
@@ -4737,36 +4736,53 @@ void ieee80211_rx_napi(struct ieee80211_
|
||||
status->rx_flags = 0;
|
||||
|
||||
/*
|
||||
- * key references and virtual interfaces are protected using RCU
|
||||
- * and this requires that we are in a read-side RCU section during
|
||||
- * receive processing
|
||||
- */
|
||||
- rcu_read_lock();
|
||||
-
|
||||
- /*
|
||||
* Frames with failed FCS/PLCP checksum are not returned,
|
||||
* all other frames are returned without radiotap header
|
||||
* if it was previously present.
|
||||
* Also, frames with less than 16 bytes are dropped.
|
||||
*/
|
||||
skb = ieee80211_rx_monitor(local, skb, rate);
|
||||
- if (!skb) {
|
||||
- rcu_read_unlock();
|
||||
+ if (!skb)
|
||||
return;
|
||||
- }
|
||||
|
||||
ieee80211_tpt_led_trig_rx(local,
|
||||
((struct ieee80211_hdr *)skb->data)->frame_control,
|
||||
skb->len);
|
||||
|
||||
- __ieee80211_rx_handle_packet(hw, pubsta, skb, napi);
|
||||
-
|
||||
- rcu_read_unlock();
|
||||
+ __ieee80211_rx_handle_packet(hw, pubsta, skb, list);
|
||||
|
||||
return;
|
||||
drop:
|
||||
kfree_skb(skb);
|
||||
}
|
||||
+EXPORT_SYMBOL(ieee80211_rx_list);
|
||||
+
|
||||
+void ieee80211_rx_napi(struct ieee80211_hw *hw, struct ieee80211_sta *pubsta,
|
||||
+ struct sk_buff *skb, struct napi_struct *napi)
|
||||
+{
|
||||
+ struct sk_buff *tmp;
|
||||
+ LIST_HEAD(list);
|
||||
+
|
||||
+
|
||||
+ /*
|
||||
+ * key references and virtual interfaces are protected using RCU
|
||||
+ * and this requires that we are in a read-side RCU section during
|
||||
+ * receive processing
|
||||
+ */
|
||||
+ rcu_read_lock();
|
||||
+ ieee80211_rx_list(hw, pubsta, skb, &list);
|
||||
+ rcu_read_unlock();
|
||||
+
|
||||
+ if (!napi) {
|
||||
+ netif_receive_skb_list(&list);
|
||||
+ return;
|
||||
+ }
|
||||
+
|
||||
+ list_for_each_entry_safe(skb, tmp, &list, list) {
|
||||
+ skb_list_del_init(skb);
|
||||
+ napi_gro_receive(napi, skb);
|
||||
+ }
|
||||
+}
|
||||
EXPORT_SYMBOL(ieee80211_rx_napi);
|
||||
|
||||
/* This is a version of the rx handler that can be called from hard irq
|
||||
@ -0,0 +1,55 @@
|
||||
From: Felix Fietkau <nbd@nbd.name>
|
||||
Date: Sun, 26 Jul 2020 14:37:02 +0200
|
||||
Subject: [PATCH] net/fq_impl: use skb_get_hash instead of
|
||||
skb_get_hash_perturb
|
||||
|
||||
This avoids unnecessary regenerating of the skb flow hash
|
||||
|
||||
Signed-off-by: Felix Fietkau <nbd@nbd.name>
|
||||
---
|
||||
|
||||
--- a/include/net/fq.h
|
||||
+++ b/include/net/fq.h
|
||||
@@ -69,15 +69,6 @@ struct fq {
|
||||
struct list_head backlogs;
|
||||
spinlock_t lock;
|
||||
u32 flows_cnt;
|
||||
-#if LINUX_VERSION_IS_GEQ(5,3,10) || \
|
||||
- LINUX_VERSION_IN_RANGE(4,19,83, 4,20,0) || \
|
||||
- LINUX_VERSION_IN_RANGE(4,14,153, 4,15,0) || \
|
||||
- LINUX_VERSION_IN_RANGE(4,9,200, 4,10,0) || \
|
||||
- LINUX_VERSION_IN_RANGE(4,4,200, 4,5,0)
|
||||
- siphash_key_t perturbation;
|
||||
-#else
|
||||
- u32 perturbation;
|
||||
-#endif
|
||||
u32 limit;
|
||||
u32 memory_limit;
|
||||
u32 memory_usage;
|
||||
--- a/include/net/fq_impl.h
|
||||
+++ b/include/net/fq_impl.h
|
||||
@@ -108,15 +108,7 @@ begin:
|
||||
|
||||
static u32 fq_flow_idx(struct fq *fq, struct sk_buff *skb)
|
||||
{
|
||||
-#if LINUX_VERSION_IS_GEQ(5,3,10) || \
|
||||
- LINUX_VERSION_IN_RANGE(4,19,83, 4,20,0) || \
|
||||
- LINUX_VERSION_IN_RANGE(4,14,153, 4,15,0) || \
|
||||
- LINUX_VERSION_IN_RANGE(4,9,200, 4,10,0) || \
|
||||
- LINUX_VERSION_IN_RANGE(4,4,200, 4,5,0)
|
||||
- u32 hash = skb_get_hash_perturb(skb, &fq->perturbation);
|
||||
-#else
|
||||
- u32 hash = skb_get_hash_perturb(skb, fq->perturbation);
|
||||
-#endif
|
||||
+ u32 hash = skb_get_hash(skb);
|
||||
|
||||
return reciprocal_scale(hash, fq->flows_cnt);
|
||||
}
|
||||
@@ -316,7 +308,6 @@ static int fq_init(struct fq *fq, int fl
|
||||
INIT_LIST_HEAD(&fq->backlogs);
|
||||
spin_lock_init(&fq->lock);
|
||||
fq->flows_cnt = max_t(u32, flows_cnt, 1);
|
||||
- get_random_bytes(&fq->perturbation, sizeof(fq->perturbation));
|
||||
fq->quantum = 300;
|
||||
fq->limit = 8192;
|
||||
fq->memory_limit = 16 << 20; /* 16 MBytes */
|
||||
@ -0,0 +1,19 @@
|
||||
From: Felix Fietkau <nbd@nbd.name>
|
||||
Date: Sun, 26 Jul 2020 14:42:58 +0200
|
||||
Subject: [PATCH] mac80211: calculcate skb hash early when using itxq
|
||||
|
||||
This avoids flow separation issues when using software encryption
|
||||
|
||||
Signed-off-by: Felix Fietkau <nbd@nbd.name>
|
||||
---
|
||||
|
||||
--- a/net/mac80211/tx.c
|
||||
+++ b/net/mac80211/tx.c
|
||||
@@ -3937,6 +3937,7 @@ void __ieee80211_subif_start_xmit(struct
|
||||
if (local->ops->wake_tx_queue) {
|
||||
u16 queue = __ieee80211_select_queue(sdata, sta, skb);
|
||||
skb_set_queue_mapping(skb, queue);
|
||||
+ skb_get_hash(skb);
|
||||
}
|
||||
|
||||
if (sta) {
|
||||
Loading…
Reference in New Issue
Block a user