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authorMatthew Whitehead <tedheadster@gmail.com>2017-04-19 12:37:10 -0400
committerDavid S. Miller <davem@davemloft.net>2017-04-21 13:22:34 -0400
commit7acf8a1e8a28b3d7407a8d8061a7d0766cfac2f4 (patch)
tree34fb2d27d86e816f25b4a41f0d5d6b8d837f5bd9 /include/uapi/linux/sysctl.h
parent20da848f8e5c2d911ee65dda1776d0f2a2408e01 (diff)
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/uapi/linux/sysctl.h')
-rw-r--r--include/uapi/linux/sysctl.h1
1 files changed, 1 insertions, 0 deletions
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 */