user
30 lines
939 B
Plaintext
30 lines
939 B
Plaintext
@startuml
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scale 600 height
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top to bottom direction
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skinparam backgroundColor transparent
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skinparam shadowing false
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skinparam defaultFontName Monospace
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skinparam defaultFontSize 10
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skinparam stateBorderColor #2c7794
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skinparam stateBackgroundColor #edf6fa
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skinparam ArrowColor #8095a1
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title A6 STATE — block state and heap statistics
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[*] --> Free : 01 one list node
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Free --> Allocated : 02 first-fit + split\ncurrent free decreases
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Allocated --> Fragmented : free A and C
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Fragmented : 03 two free blocks
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Fragmented : sum free > largest block
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Fragmented --> Coalesced : free B\naddress-order joins neighbours
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Coalesced : 04 one free block
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Coalesced : current free = initial free
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Coalesced --> OOMChecked : request > arena
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OOMChecked : NULL + hook once
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OOMChecked --> [*]
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state "05 minimum-ever" as MIN
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Allocated -right-> MIN : records low watermark
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Fragmented -right-> MIN : does not rise
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Coalesced -right-> MIN : history remains
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@enduml
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