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0e69530c6e
### Summary
Fixes long-standing ETA calculation errors in progress indicators that
have been present since February 2021. The current implementation
produces increasingly inaccurate estimates due to integer division
precision loss.
### Problem
3aeccadd04/triedb/pathdb/history_indexer.go (L541-L553)
The ETA calculation has two critical issues:
1. **Integer division precision loss**: `speed` is calculated as
`uint64`
2. **Off-by-one**: `speed` uses `+ 1`(2 times) to avoid division by
zero, however it makes mistake in the final calculation
This results in wildly inaccurate time estimates that don't improve as
progress continues.
### Example
Current output during state history indexing:
```
lvl=info msg="Indexing state history" processed=16858580 left=41802252 elapsed=18h22m59.848s eta=11h36m42.252s
```
**Expected calculation:**
- Speed: 16858580 ÷ 66179848ms = 0.255 blocks/ms
- ETA: 41802252 ÷ 0.255 = ~45.6 hours
**Current buggy calculation:**
- Speed: rounds to 1 block/ms
- ETA: 41802252 ÷ 1 = ~11.6 hours ❌
### Solution
- Created centralized `CalculateETA()` function in common package
- Replaced all 8 duplicate code copies across the codebase
### Testing
Verified accurate ETA calculations during archive node reindexing with
significantly improved time estimates.
60 lines
1.8 KiB
Go
60 lines
1.8 KiB
Go
// Copyright 2025 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package common
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import (
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"testing"
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"time"
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)
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func TestCalculateETA(t *testing.T) {
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type args struct {
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done uint64
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left uint64
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elapsed time.Duration
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}
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tests := []struct {
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name string
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args args
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want time.Duration
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}{
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{
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name: "zero done",
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args: args{done: 0, left: 100, elapsed: time.Second},
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want: 0,
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},
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{
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name: "zero elapsed",
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args: args{done: 1, left: 100, elapsed: 0},
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want: 0,
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},
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{
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name: "@Jolly23 's case",
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args: args{done: 16858580, left: 41802252, elapsed: 66179848 * time.Millisecond},
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want: 164098440 * time.Millisecond,
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// wrong msg: msg="Indexing state history" processed=16858580 left=41802252 elapsed=18h22m59.848s eta=11h36m42.252s
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// should be around 45.58 hours
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},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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if got := CalculateETA(tt.args.done, tt.args.left, tt.args.elapsed); got != tt.want {
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t.Errorf("CalculateETA() = %v ms, want %v ms", got.Milliseconds(), tt.want)
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}
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})
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}
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}
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