[Dynamic buffer][Mellanox] Fix issue: accumulative headroom can exceed limit in rare scenario #2020
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The egress mirror size is not accurate, causing the estimated accumulative headroom size to be greater than the real one Signed-off-by: Stephen Sun <[email protected]>
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Just checked, it can be cherry-picked to 202106 and 202012 branches smoothly. So tags added. 202012 |
keboliu
approved these changes
Nov 15, 2021
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@neethajohn could you please help to sign off this PR? |
neethajohn
reviewed
Nov 16, 2021
neethajohn
approved these changes
Nov 16, 2021
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@judyjoseph would you please help to cherry-pick? |
5 tasks
arlakshm
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Nov 18, 2021
…2020) - What I did The egress mirror size is not taken into account when checking the accumulative headroom size, which causes the estimated accumulate headroom size to be greater than the real one and unable to be applied. - Why I did it Bug fix - How I verified it Run regression test. - Details if related An example to explain the logic . The current accumulative headroom is 90k, egress mirror headroom is 10k, the ASIC limitation of the port is 100k. Now a user wants to change the port configuration which will make the accumulative headroom to be increased by 10k. Now the accumulative headroom estimated by buffer manager is 100k, which doesn’t exceed the limitation. However in the ASIC the real accumulative headroom is 110k which does.
qiluo-msft
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that referenced
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Nov 20, 2021
…2020) - What I did The egress mirror size is not taken into account when checking the accumulative headroom size, which causes the estimated accumulate headroom size to be greater than the real one and unable to be applied. - Why I did it Bug fix - How I verified it Run regression test. - Details if related An example to explain the logic . The current accumulative headroom is 90k, egress mirror headroom is 10k, the ASIC limitation of the port is 100k. Now a user wants to change the port configuration which will make the accumulative headroom to be increased by 10k. Now the accumulative headroom estimated by buffer manager is 100k, which doesn’t exceed the limitation. However in the ASIC the real accumulative headroom is 110k which does.
EdenGri
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Feb 28, 2022
What I did During config update, update of certain tables do demand service restart. With multiple related updates are not grouped together, this might result in too many service restarts, which could fail with "hitting start limit". When that happens, call reset-failed, try to restart. If it fails again, take a pause and try to restart again. How I did it When service restart fails, call reset-failed, try, pause and then call service restart again.
EdenGri
pushed a commit
to EdenGri/sonic-swss
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Feb 28, 2022
…-net#2028) What I did Missed update from review comments in PR sonic-net#2020 s/os.system("sleep 10s")/time.sleep(10)/
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What I did
The egress mirror size is not taken into account when checking the accumulative headroom size, which causes the estimated accumulate headroom size to be greater than the real one and unable to be applied.
Why I did it
Bug fix
How I verified it
Run regression test.
Details if related
An example to explain the logic .
The current accumulative headroom is 90k, egress mirror headroom is 10k, the ASIC limitation of the port is 100k.
Now a user wants to change the port configuration which will make the accumulative headroom to be increased by 10k.
Now the accumulative headroom estimated by buffer manager is 100k, which doesn’t exceed the limitation. However in the ASIC the real accumulative headroom is 110k which does.