diff options
| author | Matthew Whitehead <tedheadster@gmail.com> | 2017-04-19 12:37:10 -0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-04-21 13:22:34 -0400 |
| commit | 7acf8a1e8a28b3d7407a8d8061a7d0766cfac2f4 (patch) | |
| tree | 34fb2d27d86e816f25b4a41f0d5d6b8d837f5bd9 /include | |
| parent | 20da848f8e5c2d911ee65dda1776d0f2a2408e01 (diff) | |
| download | linux-7acf8a1e8a28b3d7407a8d8061a7d0766cfac2f4.tar.bz2 | |
Replace 2 jiffies with sysctl netdev_budget_usecs to enable softirq tuning
Constants used for tuning are generally a bad idea, especially as hardware
changes over time. Replace the constant 2 jiffies with sysctl variable
netdev_budget_usecs to enable sysadmins to tune the softirq processing.
Also document the variable.
For example, a very fast machine might tune this to 1000 microseconds,
while my regression testing 486DX-25 needs it to be 4000 microseconds on
a nearly idle network to prevent time_squeeze from being incremented.
Version 2: changed jiffies to microseconds for predictable units.
Signed-off-by: Matthew Whitehead <tedheadster@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/netdevice.h | 1 | ||||
| -rw-r--r-- | include/uapi/linux/sysctl.h | 1 |
2 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index 0f3c38ce5417..c49cf21f2b31 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -3296,6 +3296,7 @@ static __always_inline int ____dev_forward_skb(struct net_device *dev, void dev_queue_xmit_nit(struct sk_buff *skb, struct net_device *dev); extern int netdev_budget; +extern unsigned int netdev_budget_usecs; /* Called by rtnetlink.c:rtnl_unlock() */ void netdev_run_todo(void); diff --git a/include/uapi/linux/sysctl.h b/include/uapi/linux/sysctl.h index e13d48058b8d..177f5f139b36 100644 --- a/include/uapi/linux/sysctl.h +++ b/include/uapi/linux/sysctl.h @@ -274,6 +274,7 @@ enum NET_CORE_AEVENT_ETIME=20, NET_CORE_AEVENT_RSEQTH=21, NET_CORE_WARNINGS=22, + NET_CORE_BUDGET_USECS=23, }; /* /proc/sys/net/ethernet */ |