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Fix MemStats.Sys does not include GC heap #4

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Feb 17, 2023
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Fix MemStats.Sys does not include GC heap #4

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5 changes: 1 addition & 4 deletions gc.go
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Original file line number Diff line number Diff line change
Expand Up @@ -83,10 +83,7 @@ func ReadMemStats(ms *runtime.MemStats) {

gcOSBytes := C.GC_get_obtained_from_os_bytes()

// Since the GC delegates to malloc/free for underlying pages, the total memory occupied by both C malloc/free and
// the GC is malloc's peak RSS itself. Because mimalloc does not return pages when run under wasm, peak/current RSS
// and commit are all the same value and we only record one.
ms.Sys = uint64(peakRSS)
ms.Sys = uint64(peakRSS + gcOSBytes)
ms.HeapSys = uint64(gcOSBytes)
ms.HeapIdle = uint64(freeBytes)
ms.HeapReleased = uint64(unmappedBytes)
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