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[docker-orchagent]: Increase ndppd kernel poll interval (#7456)

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Why I did it
ndppd by default reads /proc/net/ipv6_route ever 30 seconds. Since T1s advertise so many routes to ToRs, this file is extremely large, and reading it causes ndppd's CPU usage to spike every 30 seconds

How I did it
Increase the delay for reading this file to the maximum possible value (max integer value), which will result in CPU spikes every ~24 days instead of every 30 seconds

How to verify it
Start ndppd with the new config file, confirm that no CPU spikes are seen except at startup

Signed-off-by: Lawrence Lee <lawlee@microsoft.com>
This commit is contained in:
Lawrence Lee 2021-04-30 16:30:30 -07:00 committed by GitHub
parent 668a678e5e
commit 1b39424520
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GPG Key ID: 4AEE18F83AFDEB23
3 changed files with 3 additions and 1 deletions
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2
dockers/docker-orchagent/ndppd.conf.j2
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@ -21,7 +21,7 @@
{% set _x = proxy_interfaces[intf].append(prefix) %} {% set _x = proxy_interfaces[intf].append(prefix) %}
{% endif %} {% endif %}
{% endfor -%} {% endfor -%}
route-ttl 2147483647
{% for intf, prefix_list in proxy_interfaces.items() %} {% for intf, prefix_list in proxy_interfaces.items() %}
{% if prefix_list %} {% if prefix_list %}

1
src/sonic-config-engine/tests/sample_output/py2/ndppd.conf
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@ -4,6 +4,7 @@
# #
# Config file for ndppd, the NDP Proxy Daemon # Config file for ndppd, the NDP Proxy Daemon
# See man page for ndppd.conf.5 for descriptions of all available options # See man page for ndppd.conf.5 for descriptions of all available options
route-ttl 2147483647
proxy Vlan1000 { proxy Vlan1000 {
rule fc02:1000::/64 { rule fc02:1000::/64 {

1
src/sonic-config-engine/tests/sample_output/py3/ndppd.conf
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@ -4,6 +4,7 @@
# #
# Config file for ndppd, the NDP Proxy Daemon # Config file for ndppd, the NDP Proxy Daemon
# See man page for ndppd.conf.5 for descriptions of all available options # See man page for ndppd.conf.5 for descriptions of all available options
route-ttl 2147483647
proxy Vlan1000 { proxy Vlan1000 {
rule fc01:1000::/64 { rule fc01:1000::/64 {