samsung-sm8650/android_kernel_samsung_sm8650-modules
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

qca-wifi: Drop excessive PPDU status buffers

Browse Source 
When CPU cores are fully loaded, PPDU stats process workqueue
is not getting enough time, resulting in excessive backlog of
PPDU status buffers. Check and drop buffers if the backlog is
beyond a threshold.

Change-Id: Ideef46cb4eec54dcd5a8315f36f2206653d81659
This commit is contained in:
Karunakar Dasineni
2019-07-25 07:34:20 -07:00
parent 0e1d8dd797
commit 505d7d9c6c
2 changed files with 39 additions and 18 deletions
Download Patch File Download Diff File Expand all files Collapse all files

53
dp/wifi3.0/dp_tx_capture.c
View File

@@ -162,6 +162,8 @@ void dp_tx_ppdu_stats_attach(struct dp_pdev *pdev)
qdf_spinlock_create(&pdev->tx_capture.ppdu_stats_lock);
pdev->tx_capture.ppdu_stats_queue_depth = 0;
pdev->tx_capture.ppdu_stats_next_sched = 0;
pdev->tx_capture.ppdu_stats_defer_queue_depth = 0;
pdev->tx_capture.ppdu_dropped = 0;
}
/**
@@ -855,22 +857,23 @@ uint32_t dp_tx_msdu_dequeue(struct dp_peer *peer, uint32_t ppdu_id,
wbm_tsf = ptr_msdu_info->tsf;
if (wbm_tsf < start_tsf) {
/* remove the aged packet */
nbuf = qdf_nbuf_queue_remove(
&tx_tid->msdu_comp_q);
qdf_nbuf_free(nbuf);
curr_msdu = qdf_nbuf_queue_first(
&tx_tid->msdu_comp_q);
prev_msdu = NULL;
continue;
}
if (msdu_ppdu_id == ppdu_id) {
matched = 1;
if (wbm_tsf > start_tsf && wbm_tsf < end_tsf) {
/*packet found */
} else if (wbm_tsf < start_tsf) {
/* remove the aged packet */
nbuf = qdf_nbuf_queue_remove(
&tx_tid->msdu_comp_q);
qdf_nbuf_free(nbuf);
curr_msdu = qdf_nbuf_queue_first(
&tx_tid->msdu_comp_q);
prev_msdu = NULL;
continue;
} else if (wbm_tsf > end_tsf) {
/*
* Do we need delta in above case.
@@ -1258,7 +1261,7 @@ QDF_STATUS dp_send_mpdu_info_to_stack(struct dp_pdev *pdev,
* which doesn't include BAR and other non data frame
* ~50 is maximum scheduled ppdu count
*/
#define SCHED_MAX_PPDU_CNT 50
#define SCHED_MAX_PPDU_CNT 64
/**
* dp_tx_ppdu_stats_process - Deferred PPDU stats handler
* @context: Opaque work context (PDEV)
@@ -1286,6 +1289,8 @@ void dp_tx_ppdu_stats_process(void *context)
qdf_spin_lock_bh(&ptr_tx_cap->ppdu_stats_lock);
STAILQ_CONCAT(&ptr_tx_cap->ppdu_stats_defer_queue,
&ptr_tx_cap->ppdu_stats_queue);
ptr_tx_cap->ppdu_stats_defer_queue_depth +=
ptr_tx_cap->ppdu_stats_queue_depth;
ptr_tx_cap->ppdu_stats_queue_depth = 0;
qdf_spin_unlock_bh(&ptr_tx_cap->ppdu_stats_lock);
@@ -1300,8 +1305,9 @@ void dp_tx_ppdu_stats_process(void *context)
ppdu_info_queue_elem, tmp_ppdu_info) {
if (curr_sched_cmdid != ppdu_info->sched_cmdid)
break;
sched_ppdu_list[ppdu_cnt++] = ppdu_info;
qdf_assert_always(ppdu_cnt <= SCHED_MAX_PPDU_CNT);
qdf_assert_always(ppdu_cnt < SCHED_MAX_PPDU_CNT);
sched_ppdu_list[ppdu_cnt] = ppdu_info;
ppdu_cnt++;
}
if (ppdu_info && (curr_sched_cmdid == ppdu_info->sched_cmdid) &&
ptr_tx_cap->ppdu_stats_next_sched < now_ms)
@@ -1311,6 +1317,7 @@ void dp_tx_ppdu_stats_process(void *context)
STAILQ_REMOVE_HEAD_UNTIL(&ptr_tx_cap->ppdu_stats_defer_queue,
sched_ppdu_list[ppdu_cnt - 1],
ppdu_info_queue_elem);
ptr_tx_cap->ppdu_stats_defer_queue_depth -= ppdu_cnt;
ppdu_desc_cnt = 0;
/* Process tx buffer list based on last_ppdu_id stored above */
@@ -1549,14 +1556,24 @@ void dp_ppdu_desc_deliver(struct dp_pdev *pdev,
qdf_nbuf_data(ppdu_info->nbuf);
qdf_spin_lock_bh(&pdev->tx_capture.ppdu_stats_lock);
STAILQ_INSERT_TAIL(&pdev->tx_capture.ppdu_stats_queue,
ppdu_info, ppdu_info_queue_elem);
pdev->tx_capture.ppdu_stats_queue_depth++;
if (qdf_unlikely(!pdev->tx_capture_enabled &&
(pdev->tx_capture.ppdu_stats_queue_depth +
pdev->tx_capture.ppdu_stats_defer_queue_depth) >
DP_TX_PPDU_PROC_MAX_DEPTH)) {
qdf_nbuf_free(ppdu_info->nbuf);
qdf_mem_free(ppdu_info);
pdev->tx_capture.ppdu_dropped++;
} else {
STAILQ_INSERT_TAIL(&pdev->tx_capture.ppdu_stats_queue,
ppdu_info, ppdu_info_queue_elem);
pdev->tx_capture.ppdu_stats_queue_depth++;
}
qdf_spin_unlock_bh(&pdev->tx_capture.ppdu_stats_lock);
if ((pdev->tx_capture.ppdu_stats_queue_depth >
DP_TX_PPDU_PROC_THRESHOLD) ||
(pdev->tx_capture.ppdu_stats_next_sched > now_ms)) {
(pdev->tx_capture.ppdu_stats_next_sched <= now_ms)) {
qdf_queue_work(0, pdev->tx_capture.ppdu_stats_workqueue,
&pdev->tx_capture.ppdu_stats_work);
pdev->tx_capture.ppdu_stats_next_sched =