[PATCH ath-next] wifi: ath12k: change MAC buffer ring size to 4096

[PATCH ath-next] wifi: ath12k: change MAC buffer ring size to 4096

[Yingying Tang]

For WCN7850, MAC buffer ring size is updated to 2048 in
955df16f2a4c3 ("wifi: ath12k: change MAC buffer ring size to 2048")
to increase peak throughput.

But during the RX process, a phenomenon can still be observed where
the throughput drops by about 30% from its peak value and then recovers,
and this behavior repeats during RX.

After increasing MAC buffer ring size to 4096, the data rate drop has
gone.

Tested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.1.c5-00302-QCAHMTSWPL_V1.0_V2.0_SILICONZ-1.115823.3

Signed-off-by: Yingying Tang <yingying.tang@oss.qualcomm.com>
---
 drivers/net/wireless/ath/ath12k/dp.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/wireless/ath/ath12k/dp.h b/drivers/net/wireless/ath/ath12k/dp.h
index f8cfc7bb29dd..6596089d4168 100644
--- a/drivers/net/wireless/ath/ath12k/dp.h
+++ b/drivers/net/wireless/ath/ath12k/dp.h
@@ -205,7 +205,7 @@ struct ath12k_pdev_dp {
 #define DP_REO_CMD_RING_SIZE		256
 #define DP_REO_STATUS_RING_SIZE		2048
 #define DP_RXDMA_BUF_RING_SIZE		4096
-#define DP_RX_MAC_BUF_RING_SIZE		2048
+#define DP_RX_MAC_BUF_RING_SIZE		4096
 #define DP_RXDMA_REFILL_RING_SIZE	2048
 #define DP_RXDMA_ERR_DST_RING_SIZE	1024
 #define DP_RXDMA_MON_STATUS_RING_SIZE	1024
-- 
base-commit: ff49eba595df500e4ddccc593088c8a4ab5f2c27

Re: [PATCH ath-next] wifi: ath12k: change MAC buffer ring size to 4096

[Baochen Qiang]

On 6/10/2026 11:13 AM, Yingying Tang wrote:
> For WCN7850, MAC buffer ring size is updated to 2048 in
> 955df16f2a4c3 ("wifi: ath12k: change MAC buffer ring size to 2048")
> to increase peak throughput.
> 
> But during the RX process, a phenomenon can still be observed where
> the throughput drops by about 30% from its peak value and then recovers,
> and this behavior repeats during RX.
> 
> After increasing MAC buffer ring size to 4096, the data rate drop has
> gone.
> 
> Tested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.1.c5-00302-QCAHMTSWPL_V1.0_V2.0_SILICONZ-1.115823.3
> 
> Signed-off-by: Yingying Tang <yingying.tang@oss.qualcomm.com>

Reviewed-by: Baochen Qiang <baochen.qiang@oss.qualcomm.com>

Re: [PATCH ath-next] wifi: ath12k: change MAC buffer ring size to 4096

[Rameshkumar Sundaram]

On 6/10/2026 8:43 AM, Yingying Tang wrote:
> For WCN7850, MAC buffer ring size is updated to 2048 in
> 955df16f2a4c3 ("wifi: ath12k: change MAC buffer ring size to 2048")
> to increase peak throughput.
> 
> But during the RX process, a phenomenon can still be observed where
> the throughput drops by about 30% from its peak value and then recovers,
> and this behavior repeats during RX.
> 
> After increasing MAC buffer ring size to 4096, the data rate drop has
> gone.
> 
> Tested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.1.c5-00302-QCAHMTSWPL_V1.0_V2.0_SILICONZ-1.115823.3
> 
> Signed-off-by: Yingying Tang <yingying.tang@oss.qualcomm.com>
> ---
>   drivers/net/wireless/ath/ath12k/dp.h | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/net/wireless/ath/ath12k/dp.h b/drivers/net/wireless/ath/ath12k/dp.h
> index f8cfc7bb29dd..6596089d4168 100644
> --- a/drivers/net/wireless/ath/ath12k/dp.h
> +++ b/drivers/net/wireless/ath/ath12k/dp.h
> @@ -205,7 +205,7 @@ struct ath12k_pdev_dp {
>   #define DP_REO_CMD_RING_SIZE		256
>   #define DP_REO_STATUS_RING_SIZE		2048
>   #define DP_RXDMA_BUF_RING_SIZE		4096
> -#define DP_RX_MAC_BUF_RING_SIZE		2048
> +#define DP_RX_MAC_BUF_RING_SIZE		4096
>   #define DP_RXDMA_REFILL_RING_SIZE	2048
>   #define DP_RXDMA_ERR_DST_RING_SIZE	1024
>   #define DP_RXDMA_MON_STATUS_RING_SIZE	1024

Reviewed-by: Rameshkumar Sundaram <rameshkumar.sundaram@oss.qualcomm.com>

Re: [PATCH ath-next] wifi: ath12k: change MAC buffer ring size to 4096

[Jeff Johnson]

On Tue, 09 Jun 2026 20:13:58 -0700, Yingying Tang wrote:
> For WCN7850, MAC buffer ring size is updated to 2048 in
> 955df16f2a4c3 ("wifi: ath12k: change MAC buffer ring size to 2048")
> to increase peak throughput.
> 
> But during the RX process, a phenomenon can still be observed where
> the throughput drops by about 30% from its peak value and then recovers,
> and this behavior repeats during RX.
> 
> [...]

Applied, thanks!

[1/1] wifi: ath12k: change MAC buffer ring size to 4096
      commit: 58aeb412495ada7fe5495c7805504d7cf1d45453

Best regards,
-- 
Jeff Johnson <jeff.johnson@oss.qualcomm.com>