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brcmfmac: Relax scheduling of msgbuf worker on high throughput.

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On every tx the flow worker is triggered. When running high
throughput data this causes an excessive amount of times the worker
gets activated. This patch starts scheduling the worker more relaxed
once outstanding tx has reached a certain depth.

Reviewed-by: Arend Van Spriel <arend@broadcom.com>
Reviewed-by: Franky (Zhenhui) Lin <frankyl@broadcom.com>
Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
Signed-off-by: Hante Meuleman <meuleman@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
This commit is contained in:
Hante Meuleman 2015-01-25 20:31:30 +01:00 committed by Kalle Valo
parent 382afc3d05
commit 5ef1e60419
2 changed files with 26 additions and 6 deletions
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2
drivers/net/wireless/brcm80211/brcmfmac/commonring.h
View File

@ -37,6 +37,8 @@ struct brcmf_commonring {
unsigned long flags;
bool inited;
bool was_full;
atomic_t outstanding_tx;
};

30
drivers/net/wireless/brcm80211/brcmfmac/msgbuf.c
View File

@ -73,6 +73,8 @@
#define BRCMF_MSGBUF_TX_FLUSH_CNT1 32
#define BRCMF_MSGBUF_TX_FLUSH_CNT2 96
#define BRCMF_MSGBUF_DELAY_TXWORKER_THRS 64
#define BRCMF_MSGBUF_TRICKLE_TXWORKER_THRS 32
struct msgbuf_common_hdr {
u8 msgtype;
@ -749,6 +751,7 @@ static void brcmf_msgbuf_txflow(struct brcmf_msgbuf *msgbuf, u8 flowid)
tx_msghdr->metadata_buf_len = 0;
tx_msghdr->metadata_buf_addr.high_addr = 0;
tx_msghdr->metadata_buf_addr.low_addr = 0;
atomic_inc(&commonring->outstanding_tx);
if (count >= BRCMF_MSGBUF_TX_FLUSH_CNT2) {
brcmf_commonring_write_complete(commonring);
count = 0;
@ -773,10 +776,16 @@ static void brcmf_msgbuf_txflow_worker(struct work_struct *worker)
}
static int brcmf_msgbuf_schedule_txdata(struct brcmf_msgbuf *msgbuf, u32 flowid)
static int brcmf_msgbuf_schedule_txdata(struct brcmf_msgbuf *msgbuf, u32 flowid,
bool force)
{
struct brcmf_commonring *commonring;
set_bit(flowid, msgbuf->flow_map);
queue_work(msgbuf->txflow_wq, &msgbuf->txflow_work);
commonring = msgbuf->flowrings[flowid];
if ((force) || (atomic_read(&commonring->outstanding_tx) <
BRCMF_MSGBUF_DELAY_TXWORKER_THRS))
queue_work(msgbuf->txflow_wq, &msgbuf->txflow_work);
return 0;
}
@ -797,7 +806,7 @@ static int brcmf_msgbuf_txdata(struct brcmf_pub *drvr, int ifidx,
return -ENOMEM;
}
brcmf_flowring_enqueue(flow, flowid, skb);
brcmf_msgbuf_schedule_txdata(msgbuf, flowid);
brcmf_msgbuf_schedule_txdata(msgbuf, flowid, false);
return 0;
}
@ -854,6 +863,7 @@ brcmf_msgbuf_process_ioctl_complete(struct brcmf_msgbuf *msgbuf, void *buf)
static void
brcmf_msgbuf_process_txstatus(struct brcmf_msgbuf *msgbuf, void *buf)
{
struct brcmf_commonring *commonring;
struct msgbuf_tx_status *tx_status;
u32 idx;
struct sk_buff *skb;
@ -871,6 +881,8 @@ brcmf_msgbuf_process_txstatus(struct brcmf_msgbuf *msgbuf, void *buf)
}
set_bit(flowid, msgbuf->txstatus_done_map);
commonring = msgbuf->flowrings[flowid];
atomic_dec(&commonring->outstanding_tx);
brcmf_txfinalize(msgbuf->drvr, skb, tx_status->msg.ifidx, true);
}
@ -1181,7 +1193,7 @@ brcmf_msgbuf_process_flow_ring_create_response(struct brcmf_msgbuf *msgbuf,
brcmf_flowring_open(msgbuf->flow, flowid);
brcmf_msgbuf_schedule_txdata(msgbuf, flowid);
brcmf_msgbuf_schedule_txdata(msgbuf, flowid, true);
}
@ -1280,8 +1292,10 @@ int brcmf_proto_msgbuf_rx_trigger(struct device *dev)
struct brcmf_bus *bus_if = dev_get_drvdata(dev);
struct brcmf_pub *drvr = bus_if->drvr;
struct brcmf_msgbuf *msgbuf = (struct brcmf_msgbuf *)drvr->proto->pd;
struct brcmf_commonring *commonring;
void *buf;
u32 flowid;
int qlen;
buf = msgbuf->commonrings[BRCMF_D2H_MSGRING_RX_COMPLETE];
brcmf_msgbuf_process_rx(msgbuf, buf);
@ -1293,8 +1307,12 @@ int brcmf_proto_msgbuf_rx_trigger(struct device *dev)
for_each_set_bit(flowid, msgbuf->txstatus_done_map,
msgbuf->nrof_flowrings) {
clear_bit(flowid, msgbuf->txstatus_done_map);
if (brcmf_flowring_qlen(msgbuf->flow, flowid))
brcmf_msgbuf_schedule_txdata(msgbuf, flowid);
commonring = msgbuf->flowrings[flowid];
qlen = brcmf_flowring_qlen(msgbuf->flow, flowid);
if ((qlen > BRCMF_MSGBUF_TRICKLE_TXWORKER_THRS) ||
((qlen) && (atomic_read(&commonring->outstanding_tx) <
BRCMF_MSGBUF_TRICKLE_TXWORKER_THRS)))
brcmf_msgbuf_schedule_txdata(msgbuf, flowid, true);
}
return 0;