[action] [PR:16159] Add pfc-timer-set to 500mS for pfcwd tests. #16468
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Description of PR Summary: Fixes the flakiness of pfc_gen in pfcwd scripts for cisco-8000. We use a new debug CLI script to force the DUT to wait longer in case of a miss in pfc packets from the fanout due to pfc_gen script. So even if the pfc_gen/fanout misses a couple of pfc frames to DUT, the dut would still not send out data packets. Approach What is the motivation for this PR? Flakiness of pfc-gen. Particularly with 400G links. How did you do it? We have added a new dshell based script that will force the DUT to wait before transmitting data in case of a miss in pfc pause frames. How did you verify/test it? Ran on our duts, with 100G and 400G. Any platform specific information? The new fix specific only to cisco-8000. co-authorized by: jianquanye@microsoft.com
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Original PR: #16159 |
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Description of PR
Summary:
Fixes the flakiness of pfc_gen in pfcwd scripts for cisco-8000. We use a new debug CLI script to force the DUT to wait longer in case of a miss in pfc packets from the fanout due to pfc_gen script. So even if the pfc_gen/fanout misses a couple of pfc frames to DUT, the dut would still not send out data packets.
Type of change
Back port request
Approach
What is the motivation for this PR?
Flakiness of pfc-gen. Particularly with 400G links.
How did you do it?
We have added a new dshell based script that will force the DUT to wait before transmitting data in case of a miss in pfc pause frames.
How did you verify/test it?
Ran on our duts, with 100G and 400G.
Any platform specific information?
The new fix specific only to cisco-8000.