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Initial implementation of Poisson Sortition #2084

Merged
merged 16 commits into from
Jun 26, 2020
Merged

Initial implementation of Poisson Sortition #2084

merged 16 commits into from
Jun 26, 2020

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Kubuxu
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@Kubuxu Kubuxu commented Jun 21, 2020 •
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TODO:

  • Fix debug_advance
  • Propagate wincount to actors
  • Fix TestDealMining

davidad
davidad approved these changes Jun 21, 2020
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Try as I might, and despite several potential pitfalls, I cannot spot a single bug in this implementation. Couldn't have done it better myself 💯🙏☺️

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davidad
davidad reviewed Jun 22, 2020
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refactored structure still looks correct to me 👍

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Jakub Sztandera added 8 commits June 23, 2020 16:24
Initial implementation of Poisson Sortition
ee5639a 
Signed-off-by: Jakub Sztandera <kubuxu@protocol.ai>
Improve performance of ComputeWinCount
f523b17 
As it turns out `big.Int#Mul` doesn't like it when you reuse input as
output.

```
name         old time/op    new time/op    delta
WinCounts-8    4.56µs ± 1%    3.90µs ± 2%  -14.44%  (p=0.000 n=9+10)

name         old alloc/op   new alloc/op   delta
WinCounts-8    3.50kB ± 0%    1.15kB ± 0%  -67.23%  (p=0.000 n=10+10)

name         old allocs/op  new allocs/op  delta
WinCounts-8      45.0 ± 0%      24.0 ± 0%  -46.67%  (p=0.000 n=10+10)
```

Signed-off-by: Jakub Sztandera <kubuxu@protocol.ai>
Rename fxToD
84c0b50 
Signed-off-by: Jakub Sztandera <kubuxu@protocol.ai>
Refactor poisson to struct for easier testing
8fea872 
Signed-off-by: Jakub Sztandera <kubuxu@protocol.ai>
Add comments about algorithm
d92362f 
Signed-off-by: Jakub Sztandera <kubuxu@protocol.ai>
Implement golden tests for Poisson distribution
d7f7108 
Signed-off-by: Jakub Sztandera <kubuxu@protocol.ai>
Fix lint warnings
efeaa9b 
Signed-off-by: Jakub Sztandera <kubuxu@protocol.ai>
Add tests for lambda
2b597fb 
Signed-off-by: Jakub Sztandera <kubuxu@protocol.ai>
Jakub Sztandera added 2 commits June 23, 2020 16:33
Add golden test for exp function
97088e3 
Signed-off-by: Jakub Sztandera <kubuxu@protocol.ai>
Integrate Poisson Sortition into chain sync
156a14e 
Signed-off-by: Jakub Sztandera <kubuxu@protocol.ai>
Fix TestDealMining
2165728 
Signed-off-by: Jakub Sztandera <kubuxu@protocol.ai>
Jakub Sztandera added 2 commits June 23, 2020 20:37
Fix debug_advance
1f967c6 
Signed-off-by: Jakub Sztandera <kubuxu@protocol.ai>
Fix TestInteropBH
19ed695 
Signed-off-by: Jakub Sztandera <kubuxu@protocol.ai>
@Kubuxu Kubuxu marked this pull request as ready for review June 23, 2020 18:43
Remove TestElectionExp
36d5880 
Signed-off-by: Jakub Sztandera <kubuxu@protocol.ai>
magik6k
magik6k reviewed Jun 24, 2020
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Couple of nitpicks. I didn't go very deep into the math, it feels like it does the correct thing, but I'm mostly putting my trust in @davidad saying it's correct

Probably want @whyrusleeping to have a look at this before merging

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Address @magik6k CR
88352c7 
Signed-off-by: Jakub Sztandera <kubuxu@protocol.ai>
arajasek
arajasek approved these changes Jun 24, 2020
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Math seems good, though I'm guessing the big Mults and Divs will be slow...probably not the critical path, though

Change WinCount to int64, wire it to BlockMessage
4895c89 
Signed-off-by: Jakub Sztandera <kubuxu@protocol.ai>
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Kubuxu commented Jun 24, 2020

The whole sortition for 100% miner (the most expensive) take 3.8μs.

@magik6k magik6k merged commit 2db8611 into next Jun 26, 2020
@magik6k magik6k deleted the feat/poiss-sortition branch June 26, 2020 10:26
@nicola nicola mentioned this pull request Jul 2, 2020
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@davidad davidad davidad approved these changes

@magik6k magik6k magik6k approved these changes

@arajasek arajasek arajasek approved these changes

@whyrusleeping whyrusleeping Awaiting requested review from whyrusleeping

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4 participants
@Kubuxu @davidad @magik6k @arajasek