[Reclaim buffer][202012] Reclaim unused buffers by applying zero buffer profiles #9063
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This is to backport community PR #8768 to 202012 branch
Why I did it
Support zero buffer profiles
INACTIVE PORTS
dynamic buffer manager
to load zero pools and profiles from a JSON fileSigned-off-by: Stephen Sun [email protected]
How I did it
Add buffer profiles and pool definition for zero buffer profiles
Update
buffers_config.j2
to supportINACTIVE PORTS
by extending the existing macros to generate the various buffer objects, including PGs, queues, ingress/egress profile listsEnable
buffer manager
to load zero pools and profiles from a JSON file:platform/<vendor>
folder to/usr/share/sonic/temlates
folder in compiling time and rendered when the swss container is being created.To make code clean and reduce redundant code, extract common macros from buffer_defaults_t{0,1}.j2 of all SKUs to two common files:
Those files of all other SKUs will be symbol link to the above files
Update
sonic-cfggen
test accordingly:How to verify it
Run regression test and manually test.
Which release branch to backport (provide reason below if selected)
Description for the changelog
A picture of a cute animal (not mandatory but encouraged)