Fix new_session benchmark in pallet_collator_selection
#3189
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Signed-off-by: georgepisaltu <george.pisaltu@parity.io>
georgepisaltu
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joepetrowski
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Feb 2, 2024
seadanda
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bkchr
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Feb 2, 2024
bkchr
merged commit 8bf9c79
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paritytech:mrcnski/enable-async-backing-on-testnet-system-chains
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Issue was discovered by enabling async backing on all parachains in this PR.
The reason it happened is because with the move to async backing, the
DAYSandHOURSconstants doubled compared to the previously imported values from parachain_common, which led to thePerioddoubling. This matters because inpallet_collator_selection::Config, the allowed period of inactivity for collators is aPeriod. When a new session is initialized, candidates which don't meet the criteria here are removed.The benchmark code hardcoded the last active block value which is safe from kick to the pervious value of a period,
1800, with the chain starting at0. When running the check,KickThresholdwas1800, so it would pass, but it obviously doesn't work if thePeriodisn't1800.This PR fixes the benchmark by setting the
new_blockvalue toT::KickThreshold::get(), which will work for any chosenPeriod.Opening this PR against the original branch to expedite the merge.