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# File 'modules/profile/manifests/lvs/interface_tweaks.pp', line 4
define profile::lvs::interface_tweaks(
$interface=$name,
$txqlen=false,
$rss_pattern='',
$do_rps=true,
) {
if $interface != $facts['interface_primary'] {
interface::manual { $name:
interface => $interface,
}
}
# Disable LRO to avoid merging important headers for flow control and such
interface::offload { "${interface}-lro":
interface => $interface,
setting => 'lro',
value => 'off',
}
# RSS/RPS/XPS-type perf stuff ( https://www.kernel.org/doc/Documentation/networking/scaling.txt )
if $do_rps {
interface::rps { $name:
interface => $interface,
rss_pattern => $rss_pattern,
}
}
# Optional larger TX queue len for 10Gbps+
if $txqlen {
interface::txqueuelen { $name:
interface => $interface,
len => $txqlen,
}
}
# Max out ring buffers, seems to eliminate the spurious drops under heavy traffic
$ring_size = $facts['net_driver'][$interface]['driver'] ? {
'bnx2x' => 4078,
'bnxt_en' => 2047,
}
if $facts['net_driver'][$interface]['driver'] =~ /^bnx(2x|t_en)$/ {
interface::ring { "${name} rxring":
interface => $interface,
setting => 'rx',
value => $ring_size,
}
# Disable ethernet PAUSE behavior, dropping is better than buffering (in reasonable cases!)
interface::noflow { $interface: }
}
# bnxt_en also needs the tx set explicitly, unlike bnx2x above
if $facts['net_driver'][$interface]['driver'] == 'bnxt_en' {
interface::ring { "${name} txring":
interface => $interface,
setting => 'tx',
value => $ring_size,
}
}
}
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