🛠️ Troubleshooting Client PC Performance Issues

🧪 Step-by-Step Diagnostic Procedure

When a client machine is reported to be sluggish or underperforming, follow these steps to investigate:

---

1. 🌐 Check Network Connection in ggRock

A machine operating at a 100 Mbps link speed instead of 1 Gbps (or higher) will experience slow boot times and UI lag.

• Log in to the ggRock Web UI
• Navigate to Machines
• Locate the affected machine (e.g., PC25)
• Confirm the Link Speed displayed

⚠️ If the machine is linked at 100 Mbps, inspect the switch port, Ethernet cable, or NIC. Consider:

• Swapping ports or cables
• Restarting the switch
• Ensuring auto-negotiation is enabled on the switch

---

2. 🧠 Run Windows Memory Diagnostic

Faulty RAM can lead to intermittent performance issues. Here’s how to test for memory problems:

1. Press Win + R and type mdsched
2. Select Restart now and check for problems

3. The system will reboot and automatically run the test
4. After the test:

• Open Event Viewer
• Go to Windows Logs > System
• Search for "MemoryDiagnostics-Results"

🔁 Note: Be sure to enable “Keep Writebacks” for the machine in ggRock before starting this test to avoid data loss.

---

3. ✅ Run Benchmarking Tools

Use the following tools to assess disk, network, CPU, and GPU performance:

• CrystalDiskMark
  → Tests read/write speed of the local storage
  → Download: CrystalDiskMark
• iPerf3
  → Measures network throughput
  → Run against a local iPerf3 server for best accuracy

---

🌐 Using iPerf3 for Network Speed Testing (Windows & Linux)

Applies to: ggRock servers, client machines, general LAN troubleshooting
Last Updated: April 2025
Use Case: Measuring network performance between a server and a client (e.g., to troubleshoot slow diskless boot or sluggish in-game performance).

---

📘 What is iPerf3?

iPerf3 is an open-source network performance measurement tool that creates TCP or UDP traffic streams between two machines (a "client" and a "server") and reports the throughput.

This is especially useful for:

• Measuring maximum network bandwidth
• Troubleshooting latency or packet loss
• Identifying network bottlenecks in LAN environments

---

⚔️ TCP vs UDP in iPerf3

✅ Tip: Use TCP for most scenarios unless you're specifically testing real-time applications like VoIP or game streaming.

---

🐧 Installing iPerf3 on Linux (Debian)

1. Log in to your Debian system.
2. Install iPerf3:

   sudo apt-get update
   sudo apt-get install iperf3

3. Confirm installation:

   iperf3 --version

---

🪟 Installing iPerf3 on Windows

1. Download the iPerf3 Windows build from:
   https://files.budman.pw/
2. Extract the ZIP archive to a known location (e.g., Desktop).
3. Open Command Prompt and navigate to the extracted folder:

   cd "C:\Users\YourName\Desktop\iperf-3.x.x"

---

🚀 Running iPerf3 Tests

🖥️ On the Server (Debian/Linux):

1. Run in server mode:

   iperf3 -s

The terminal should say:
Server listening on 5201

---

💻 On the Client (Windows):

1. Open Command Prompt in the iPerf3 folder.
2. Run a client test against the server’s IP:

   iperf3.exe -c [Server_IP]

Example:

   iperf3.exe -c 192.168.1.100

---

📊 Understanding the Output

During the test, the client sends data to the server.

• Sender = Client → Upload test from client to server
• Receiver = Server → Download test on server from client

[ ID] Interval Transfer Bandwidth
[ 4] 0.00-10.00 sec 112 MBytes 94.0 Mbits/sec sender
[ 4] 0.00-10.00 sec 111 MBytes 93.1 Mbits/sec receiver

📌 Want to test download performance from server to client? Use the reverse flag:

• Server: iperf3 -s
• Client: iperf3.exe -c [Server_IP] -R

---

• GPU Benchmark
  → Use Unigine Heaven or GPU driver tools (e.g., NVIDIA Control Panel)
• CPU Burn Test
  → Run a short stress test (cpuburn or similar) for 60 seconds to evaluate CPU stability

---

📝 Notes

• Compare test results with a known healthy machine running the same image.
• Keep screenshots or logs of results for documentation or support tickets.

---

Still having issues?
Contact ggSupport or submit a ticket from your ggRock dashboard.

---