| Message ID | 1515350200-29472-6-git-send-email-subashab@codeaurora.org |
|---|---|
| State | Accepted, archived |
| Delegated to: | David Miller |
| Headers | show |
| Series | net: qualcomm: rmnet: Enable csum offloads | expand |
diff --git a/drivers/net/ethernet/qualcomm/rmnet/rmnet_handlers.c b/drivers/net/ethernet/qualcomm/rmnet/rmnet_handlers.c index 8e1f43a..8f8c4f2 100644 --- a/drivers/net/ethernet/qualcomm/rmnet/rmnet_handlers.c +++ b/drivers/net/ethernet/qualcomm/rmnet/rmnet_handlers.c @@ -16,6 +16,7 @@ #include <linux/netdevice.h> #include <linux/netdev_features.h> #include <linux/if_arp.h> +#include <net/sock.h> #include "rmnet_private.h" #include "rmnet_config.h" #include "rmnet_vnd.h" @@ -204,6 +205,8 @@ void rmnet_egress_handler(struct sk_buff *skb) struct rmnet_priv *priv; u8 mux_id; + sk_pacing_shift_update(skb->sk, 8); + orig_dev = skb->dev; priv = netdev_priv(orig_dev); skb->dev = priv->real_dev;
The real device over which the rmnet devices are installed also aggregate multiple IP packets and sends them as a single large aggregate frame to the hardware. This causes degraded throughput for TCP TX due to bufferbloat. To overcome this problem, pacing shift value of 8 is set using the sk_pacing_shift_update() helper. This value was determined based on experiments with a single stream TCP TX using iperf for a duration of 30s. Pacing shift | Observed data rate (Mbps) 10 | 9 9 | 140 8 | 146 (Max link rate) Signed-off-by: Subash Abhinov Kasiviswanathan <subashab@codeaurora.org> --- drivers/net/ethernet/qualcomm/rmnet/rmnet_handlers.c | 3 +++ 1 file changed, 3 insertions(+)