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

qcacmn: Add nbuf and nbuf->data prefetch in Lithium RX

Browse Source 
Adding a nbuf and nbuf->data prefetches in 2nd loop
of Lithium datapath RX improved UDP throughput by
about 250Mbps.
PINE default driver: 3189Mbps @ 100% core-3
PINE with prefetch:  3469Mbps @ 100% core-3

Note: PINE reo ring is mapped to core-3.
Change-Id: I7f166b52c3697facdce3954994755c9c1412c1f3
This commit is contained in:
Tallapragada Kalyan
2021-09-07 07:18:35 +05:30
committed by Madan Koyyalamudi
parent 47d6589295
commit 5026c5a3d3
3 changed files with 33 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
dp/wifi3.0/li/dp_li.h
View File

@@ -20,6 +20,7 @@
#include <dp_types.h>
#include <hal_li_tx.h>
#include <hal_li_rx.h>
/* WBM2SW ring id for rx release */
#define WBM2SW_REL_ERR_RING_NUM 3

2
dp/wifi3.0/li/dp_li_rx.c
View File

@@ -455,6 +455,8 @@ done:
nbuf = nbuf_head;
while (nbuf) {
next = nbuf->next;
dp_rx_prefetch_nbuf_data(nbuf, next);
if (qdf_unlikely(dp_rx_is_raw_frame_dropped(nbuf))) {
nbuf = next;
DP_STATS_INC(soc, rx.err.raw_frm_drop, 1);

30
dp/wifi3.0/li/dp_li_rx.h
View File

@@ -100,4 +100,34 @@ dp_rx_peer_metadata_peer_id_get_li(struct dp_soc *soc, uint32_t peer_metadata)
return metadata->peer_id;
}
#ifdef QCA_DP_RX_NBUF_AND_NBUF_DATA_PREFETCH
static inline
void dp_rx_prefetch_nbuf_data(qdf_nbuf_t nbuf, qdf_nbuf_t next)
{
struct rx_pkt_tlvs *pkt_tlvs;
if (next) {
/* prefetch skb->next and first few bytes of skb->cb */
qdf_prefetch(next);
/* skb->cb spread across 2 cache lines hence below prefetch */
qdf_prefetch(&next->_skb_refdst);
qdf_prefetch(&next->len);
qdf_prefetch(&next->protocol);
pkt_tlvs = (struct rx_pkt_tlvs *)next->data;
/* sa_idx, da_idx, l3_pad in RX msdu_end TLV */
qdf_prefetch(pkt_tlvs);
/* msdu_done in RX attention TLV */
qdf_prefetch(&pkt_tlvs->attn_tlv);
/* fr_ds & to_ds in RX MPDU start TLV */
if (qdf_nbuf_is_rx_chfrag_end(nbuf))
qdf_prefetch(&pkt_tlvs->mpdu_start_tlv);
}
}
#else
static inline
void dp_rx_prefetch_nbuf_data(qdf_nbuf_t nbuf, qdf_nbuf_t next)
{
}
#endif
#endif