Chromebook Diagnostics – Testing Chromebook CPU, Memory, Network Connectivity
If your device is slow to load webpages, applications or other uses, please check your device’s performance to pinpoint the issue. The 3 main items that would cause this issue are CPU overloaded, Memory (RAM) overloaded, or Network connectivity issues.
These can be checked from the ‘Diagnostics’ app right on a Chromebook.
Open the Diagnostics App (shortcut = Press Ctrl + Search + Esc)
Click the launcher in the bottom left corner of Chrome
Search for ‘Diagnostic’
Launch the Diagnostics App:
Checking CPU Usage
In the Diagnostics app scroll down until you see CPU with a graph.
Pay attention to the Current Usage value and look at the graph.
Proceed with whatever test/scenario you were receiving slow performance with, such as opening a large website like cnn.com .
Switch back to the diagnostics app to see the usage. If it sits at above 95% usage for a while, your device is resource capped on the CPU, this is the cause.
Closing everything but the primary website/tab/application will assist with this, however certain large websites or applications will always use more CPU than others.
Checking Memory Usage
In the Diagnostics app scroll down until you see Memory with a graph.
Pay attention to the Current Usage value and look at the graph.
Proceed with whatever test/scenario you were receiving slow performance with.
If the available is less than 0.40 GB you’re overloading the memory, there is not enough to quickly load applications, so everything must wait in a queue until more comes available.
Close everything but the primary application to resolve this.
Checking Network Connectivity
In the Diagnostics app click Connectivity on the top left side:
Wait for a few seconds as it runs some tests:
When it is done, if everything is PASSED, you have no network connectivity issues. You can verify further information below, such as signal strength:
If any test FAILED, take a screenshot and click the Save test details on the bottom left. Upload this within a helpdesk ticket to be submitted for assistance.
If your network connectivity tests pass but you are still experiencing slowness AND your CPU + Memory are not overloaded
If your CPU + Memory test out fine and your network connectivity tests all pass but you are experiencing slowness, please run a speed test and provide a screen capture of that information in a ticket for assistance.
Allow the test to fully complete.
Items of importance here are:
Download speed (anything above 10Mbps is good for most activities)
Upload speed (anything above 2Mbps is good for most activities)
Latency (anything below 150ms is good for most activities)
Jitter (anything below 100ms is good for most activities)
Packet loss (this should be 0.X % or – , anything else here here could indicate a connection issue). Less than 1.0% is acceptable and generally not noticeable.