[Bug 277196] Azure reports high CPU usage on ARM64 14.0 Base Install

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=277196

            Bug ID: 277196
           Summary: Azure reports high CPU usage on ARM64 14.0 Base
                    Install
           Product: Base System
           Version: 14.0-STABLE
          Hardware: arm64
                OS: Any
            Status: New
          Severity: Affects Many People
          Priority: ---
         Component: arm
          Assignee: freebsd-arm@FreeBSD.org
          Reporter: josh_bailey@lcca.com

Overview:
High CPU usage reported using Azure Marketplace image.

Steps to Reproduce:
Build the following VM in Azure
Marketplace Image:
thefreebsdfoundation:freebsd-14_0:14_0-release-arm64-gen2-ufs:14.0.0
VM Size: Standard B2pls v2 (2 vcpus, 4 GiB memory)
VM architecture: Arm64 

# Cloud Shell command line (Will need to modify --resource-group)
az vm create --name testarm64 --resource-group rg-test-arm64 --nsg '' --image
thefreebsdfoundation:freebsd-14_0:14_0-release-arm64-gen2-ufs:14.0.0
--admin-username abcdroot --admin-password "abcd12341234!" --accept-term --size
Standard_B2pls_v2 --public-ip-address ""

Base install should reproduce the issue, no other steps other than running the
system.

Actual Results:
Azure CPU Metrics reports CPU Percentage average of 43%
running "top" shows the following with less than 2% deviation of any specific
metric
CPU 0:  0.0% user,  0.0% nice,  0.0% system,  0.0% interrupt,  100% idle
CPU 1:  0.0% user,  0.0% nice,  0.0% system,  0.0% interrupt,  100% idle

Expected Results:
Azure CPU Metrics should be in line with metrics reported by OS.

Build:
FreeBSD testarm64 14.0-RELEASE-p5 FreeBSD 14.0-RELEASE-p5 #0: Tue Feb 13
23:49:05 UTC 2024

Additional Info:
I have tested creating multiple VMs in multiple subscriptions in the EastUS2
and North Central US regions with identical results. 

I have also reached out to Azure and reported the issue.  They state they do
not support third party products in the Azure Marketplace and that I should
reach out to the vendor for support.

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