diff options
| author | Subash Abhinov Kasiviswanathan <subashab@codeaurora.org> | 2018-01-07 11:36:35 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-01-08 13:58:49 -0500 |
| commit | 4e8683a95c963d766c7341eddbbc2d0c20022ebf (patch) | |
| tree | e4832e09c9a55930e3c294cf9b684991b2f01ad9 | |
| parent | b23e722ed69075b8a35070a272405653c6911fa5 (diff) | |
net: qualcomm: rmnet: Set pacing shift
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>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/ethernet/qualcomm/rmnet/rmnet_handlers.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/net/ethernet/qualcomm/rmnet/rmnet_handlers.c b/drivers/net/ethernet/qualcomm/rmnet/rmnet_handlers.c index 8e1f43a69227..8f8c4f205166 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; |