From 439b2c52460c7e2be3e5ea5e8ace01d2c49b97d0 Mon Sep 17 00:00:00 2001
From: Fmstrat <nospam@nowsci.com>
Date: Fri, 13 Nov 2020 16:49:13 -0500
Subject: [PATCH] Added improving performance section

---
 README.md | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/README.md b/README.md
index 562eb1c..c9330ad 100644
--- a/README.md
+++ b/README.md
@@ -125,6 +125,8 @@ virsh define kvm/RDPWindows.xml
 virsh autostart RDPWindows
 ```
 
+To increase performance of the VM and decrease resource utilization, read the [Improving Performance](#improving-performance) section.
+
 You will now want to change any settings on the VM and install Windows and whatever programs you would like, such as Microsoft Office. If the definition fails, you can always manually create a VM. You can access VMs with:
 ``` bash
 virt-manager
@@ -235,6 +237,26 @@ The following commands can be used to manage your application configurations:
 ./installer.sh --system --uninstall  # Remove all configured applications for the entire system
 ```
 
+## Improving performance
+
+#### Reducing idle CPU usage from ~25% to ~3%
+In KVM, the CPU timing is not optimized by default. Use `virsh edit RDPWindows` to edit the VM and change:
+``` xml
+<clock offset='localtime'>
+  <timer name='rtc' tickpolicy='catchup'/>
+  <timer name='pit' tickpolicy='delay'/>
+  <timer name='hpet' present='no'/>
+  <timer name='hypervclock' present='yes'/>
+</clock>
+```
+to:
+``` xml
+<clock offset='localtime'>
+  <timer name='hpet' present='yes'/>
+  <timer name='hypervclock' present='yes'/>
+</clock>
+```
+
 ## Shout outs
 - Some icons pulled from
   - Fluent UI React - Icons under [MIT License](https://github.com/Fmstrat/fluent-ui-react/blob/master/LICENSE.md)