GC: Fix survival rates for LOH/POH #100716
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Maoni0
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Apr 9, 2024
Maoni0
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Maoni0
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This was referenced May 1, 2024
michaelgsharp
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May 9, 2024
The survival rate calculation for BGCs includes objects allocated during the BGC in the numerator but not denominator. This fixes that by adding them to size_before. The existing counters are reset mid-BGC, so the mark and sweep phases need to be added at separate points. I verified the fix over several gcperfsim runs and watched the counters getting updated in the debugger. This includes some new and moved comments from going through the phases of BGC and putting similarly ifdef-ed code together. Partial fix for dotnet#100594
Ruihan-Yin
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May 30, 2024
The survival rate calculation for BGCs includes objects allocated during the BGC in the numerator but not denominator. This fixes that by adding them to size_before. The existing counters are reset mid-BGC, so the mark and sweep phases need to be added at separate points. I verified the fix over several gcperfsim runs and watched the counters getting updated in the debugger. This includes some new and moved comments from going through the phases of BGC and putting similarly ifdef-ed code together. Partial fix for dotnet#100594
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The survival rate calculation for BGCs includes objects allocated during the BGC in the numerator but not denominator. This fixes that by adding them to size_before. The existing counters are reset mid-BGC, so the mark and sweep phases need to be added at separate points. I verified the fix over several gcperfsim runs and watched the counters getting updated in the debugger.
This includes some new and moved comments from going through the phases of BGC and putting similarly ifdef-ed code together.
Partial fix for #100594