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| 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 /kernel | |
| parent | Merge branch 'iptunnel-policy-based-routing' (diff) | |
| download | linux-dev-7acf8a1e8a28b3d7407a8d8061a7d0766cfac2f4.tar.xz linux-dev-7acf8a1e8a28b3d7407a8d8061a7d0766cfac2f4.zip | |
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 'kernel')
| -rw-r--r-- | kernel/sysctl_binary.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/kernel/sysctl_binary.c b/kernel/sysctl_binary.c index ece4b177052b..4ee3e49530d2 100644 --- a/kernel/sysctl_binary.c +++ b/kernel/sysctl_binary.c @@ -197,6 +197,7 @@ static const struct bin_table bin_net_core_table[] = { { CTL_INT, NET_CORE_AEVENT_ETIME, "xfrm_aevent_etime" }, { CTL_INT, NET_CORE_AEVENT_RSEQTH, "xfrm_aevent_rseqth" }, { CTL_INT, NET_CORE_WARNINGS, "warnings" }, + { CTL_INT, NET_CORE_BUDGET_USECS, "netdev_budget_usecs" }, {}, }; |