<!--
Copyright 2023 The Chromium Authors
Use of this source code is governed by a BSD-style license that can be
found in the LICENSE file.
-->
<!--
This file describes the enumerations referenced by entries in histograms.xml for
this directory. Some enums may instead be listed in the central enums.xml file
at src/tools/metrics/histograms/enums.xml when multiple files use them.
For best practices on writing enumerations descriptions, see
https://chromium.googlesource.com/chromium/src.git/+/HEAD/tools/metrics/histograms/README.md#Enum-Histograms
Please follow the instructions in the OWNERS file in this directory to find a
reviewer. If no OWNERS file exists, please consider signing up at
go/reviewing-metrics (Googlers only), as all subdirectories are expected to
have an OWNERS file. As a last resort you can send the CL to
[email protected].
-->
<histogram-configuration>
<!-- Enum types -->
<enums>
<enum name="AndroidEvictionReason">
<int value="0" label="TabUnusedTooLong"/>
<int value="1" label="TabUnusedInSession"/>
<int value="2" label="LimitOfActiveTabs"/>
<int value="3" label="EvictNTabs"/>
<int value="4" label="EvictAll"/>
</enum>
<enum name="AndroidStackUnwinder">
<int value="0" label="Not checked (obsolete)">
The stack unwinding implementation was not checked. The SamplingHeapProfiler
will collect stack samples but they may be invalid. (Starting in Sept 2022,
the implementation is always checked on Android so this is obsolete.)
</int>
<int value="1" label="Default">
The SamplingHeapProfiler uses the default unwind tables.
</int>
<int value="2" label="CFIBackTrace (obsolete)">
The SamplingHeapProfiler uses the trace_event::CFIBacktraceAndroid class.
</int>
<int value="3" label="Unavailable">
Stack unwinding is not available. The SamplingHeapProfiler will not collect
stack samples.
</int>
<int value="4" label="FramePointers">
The SamplingHeapProfiler uses the TraceStackFramePointers function.
</int>
</enum>
<enum name="BooleanGreaterOrEqualThan200MB">
<int value="0" label="lt; 200MB"/>
<int value="1" label="gt;= 200MB"/>
</enum>
<enum name="BooleanLargeAllocationFromFreelist">
<int value="0" label="Allocated via IPC"/>
<int value="1" label="Allocated via Freelist"/>
</enum>
<enum name="MappedAndResidentPagesDumpState">
<int value="0" label="kAccessPagemapDenied"/>
<int value="1" label="kFailure"/>
<int value="2" label="kSuccess"/>
</enum>
<enum name="MemoryPressureLevel">
<int value="0" label="No memory pressure"/>
<int value="1" label="Moderate memory pressure"/>
<int value="2" label="Critical memory pressure"/>
</enum>
<enum name="MemoryPressureLevelChanges">
<int value="0" label="No pressure to moderate pressure"/>
<int value="1" label="No pressure to critical pressure"/>
<int value="2" label="Moderate pressure to critical pressure"/>
<int value="3" label="Critical pressure to moderate pressure"/>
<int value="4" label="Critical pressure to no pressure"/>
<int value="5" label="Moderate pressure to no pressure"/>
</enum>
<enum name="VmmmsRequestPriority">
<!-- This must be kept in sync with enum UmaResizePriority in ChromeOS
src/platform2/vm_tools/concierge/mm/resize_priority.h -->
<int value="0" label="Invalid"/>
<int value="1" label="Balloon Stall"/>
<int value="2" label="No Kill Candidates Host"/>
<int value="3" label="No Kill Candidates Guest"/>
<int value="4" label="Focused Tab"/>
<int value="5" label="Focused App"/>
<int value="6" label="Perceptible Tab"/>
<int value="7" label="Perceptible App"/>
<int value="8" label="Cached Tab"/>
<int value="9" label="Aggressive Balloon"/>
<int value="10" label="Cached App"/>
<int value="11" label="MGLRU Reclaim"/>
<int value="12" label="Stale Cached Tab"/>
<int value="13" label="Stale Cached App"/>
</enum>
<enum name="VmmSwapDisableReason">
<int value="0" label="VM shutdown while active"/>
<int value="1" label="VM shutdown while inactive"/>
<int value="2" label="Low disk space while active"/>
<int value="3" label="Low disk space while inactive"/>
<int value="4" label="Disable request while active"/>
<int value="5" label="Disable request while inactive"/>
</enum>
<enum name="VmmSwapPolicyResult">
<int value="0" label="Approve enable request"/>
<int value="1" label="Cool down reject on enable request"/>
<int value="2" label="Usage reject on enable request"/>
<int value="3" label="TBW limit on enable request"/>
<int value="4" label="Low disk on enable request"/>
<int value="5" label="Approve maintenance request"/>
<int value="6" label="Cool down reject on maintenance request"/>
<int value="7" label="Usage reject on maintenance request"/>
<int value="8" label="TBW limit on maintenance request"/>
<int value="9" label="Low disk on maintenance request"/>
</enum>
<enum name="VmmSwapState">
<int value="0" label="Enabled"/>
<int value="1" label="Disabled"/>
</enum>
</enums>
</histogram-configuration>
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