<!--
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 is used to generate a comprehensive list of Virtualization system related,
i.e. the stack common to all Guests running on Chrome OS, histograms along with a detailed
description for each histogram.
For best practices on writing histogram descriptions, see
https://chromium.googlesource.com/chromium/src.git/+/HEAD/tools/metrics/histograms/README.md
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>
<histograms>
<variants name="DiskStatsDuration">
<variant name="Boot" summary="boot"/>
<variant name="Daily" summary="last 24 hours"/>
</variants>
<variants name="VmName">
<variant name="ARCVM" summary="ARCVM"/>
<variant name="BOREALIS" summary="BOREALIS"/>
<variant name="BRUSCHETTA" summary="BRUSCHETTA"/>
<variant name="PLUGIN_VM" summary="PLUGIN_VM"/>
<variant name="TERMINA" summary="TERMINA"/>
</variants>
<histogram name="Virtualization.{Name}.Disk.{Duration}.IoCount" units="count"
expires_after="2025-01-05">
<owner>[email protected]</owner>
<owner>[email protected]</owner>
<summary>
The total count of read, write, flush, and discard operations that
virtio-blk devices during {Duration} in {Name}.
</summary>
<token key="Name" variants="VmName"/>
<token key="Duration" variants="DiskStatsDuration"/>
</histogram>
<histogram name="Virtualization.{Name}.Disk.{Duration}.IoSize" units="MiB"
expires_after="2025-01-05">
<owner>[email protected]</owner>
<owner>[email protected]</owner>
<summary>
The total size of read and write IO that virtio-blk devices performed during
{Duration} in {Name}.
</summary>
<token key="Name" variants="VmName"/>
<token key="Duration" variants="DiskStatsDuration"/>
</histogram>
<histogram name="Virtualization.{Name}.Disk.{Duration}.IoTicks"
units="Milliseconds" expires_after="2025-01-05">
<owner>[email protected]</owner>
<owner>[email protected]</owner>
<summary>
The total time that virtio-blk devices performed read, write, flush, and
discard operations during {Duration} in {Name}.
</summary>
<token key="Name" variants="VmName"/>
<token key="Duration" variants="DiskStatsDuration"/>
</histogram>
<histogram name="Virtualization.{Name}.Disk.{Duration}.KbPerTicks"
units="KiBPerMilliSecond" expires_after="2025-01-05">
<owner>[email protected]</owner>
<owner>[email protected]</owner>
<summary>
The average throughput of read and write operations that virio-blk devices
performed during {Duration} in {Name}.
</summary>
<token key="Name" variants="VmName"/>
<token key="Duration" variants="DiskStatsDuration"/>
</histogram>
<histogram name="Virtualization.{Name}.SecurityKeyAttach" enum="BooleanSuccess"
expires_after="2025-02-01">
<owner>[email protected]</owner>
<owner>[email protected]</owner>
<summary>
True when the vmc key-attach command to attach a security key to a VM is
successful. False when the command has failed.
</summary>
<token key="Name" variants="VmName"/>
</histogram>
<histogram name="Virtualization.{Name}.StartDuration" units="Milliseconds"
expires_after="2025-01-05">
<owner>[email protected]</owner>
<owner>[email protected]</owner>
<summary>
The time taken to start a {Name} VM in milliseconds. This metric is emitted
at the end of a StartVmRequest for {Name} VM by the Concierge daemon in
Chrome OS.
</summary>
<token key="Name" variants="VmName"/>
</histogram>
<histogram name="Virtualization.{Name}.StopDuration" units="Milliseconds"
expires_after="2025-01-05">
<owner>[email protected]</owner>
<owner>[email protected]</owner>
<summary>
The time taken to stop a {Name} VM in milliseconds. This metric is emitted
at the end of a StopVmRequest for {Name} VM by the Concierge daemon in
Chrome OS.
</summary>
<token key="Name" variants="VmName"/>
</histogram>
</histograms>
</histogram-configuration>
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