Make disabling of tso and gso bandwith dependant

src/tc-gen.sh

@@ -181,6 +181,17 @@ get_mtu () {
  cat /sys/class/net/${1}/mtu
 }
 
+get_tx_offloads () {
+ # Takes rate in mbit/s as parameter
+ local RATE=$1
+
+ if [[ ${RATE} -lt 40 ]]; then
+ echo "tso off gso off"
+ else
+ echo "tso on gso on"
+ fi
+}
+
 get_limit () {
  # Takes rate in mbit/s as parameter
  local RATE=$1
@@ -227,10 +238,8 @@ print_config () {
 }
 
 apply_egress_shaping () {
- # tso and probably gso on the outgoing interface makes the shaping
- # inaccurate in my tests. It is not unusable with these on but the CPU
- # hit is minimal in my tests and it makes the shaping much more accurate.
- ${ETHTOOL} --offload ${IF_NAME} tso off gso off
+ # Disable tso and gso for lower bandwiths
+ ${ETHTOOL} --offload ${IF_NAME} $(get_tx_offloads ${UP_RATE})
 
  # Add root handle and set default leaf
  ${TC} qdisc add dev ${IF_NAME} root handle 1: htb default 99