docs: add gpu docs

docs/src/en/SUMMARY.md

@@ -37,8 +37,9 @@
 - [Test](dev-guide/test/README.md)
   - [Test scenes](dev-guide/test/test-scenes.md)
 - [Log](dev-guide/log/README.md)
-- [Internals]()
+- [Internals](dev-guide/internals/README.md)
   - [Log multiline](dev-guide/internals/log-multiline.md)
+  - [GPU](dev-guide/internals/gpu.md)
 
 # Operations
 - [Deployment]()

docs/src/en/dev-guide/internals/README.md

@@ -0,0 +1,2 @@
+# HoloInsight Internals
+This directory contains HoloInsight internal details or uncategorized documentation.

docs/src/en/dev-guide/internals/gpu.md

@@ -0,0 +1,43 @@
+# GPU
+HoloInsight-Agent uses a query on the [nvidia-smi](https://developer.nvidia.com/nvidia-system-management-interface) binary to pull GPU stats including memory and GPU usage, temp and other.
+
+This GPU plugin is automatically activated if `nvidia-smi` is present.
+
+This plugin does not require any configuration.
+
+![GPU dashboard](../../../resources/images/dev-guide/internals/dashboard-gpu.png)
+![GPU dashboard](../../../resources/images/dev-guide/internals/app-gpu.png)
+
+# nvidia-smi commands
+
+List all GPUs
+```bash
+nvidia-smi -L
+```
+
+Query GPU,memory utilization
+```bash
+nvidia-smi --query-gpu=index,utilization.gpu,utilization.memory --format=csv
+```
+
+> nvidia-smi --help-query-gpu
+
+Query memory usage
+```bash
+nvidia-smi --query-gpu=index,memory.used,memory.free,memory.total --format=csv
+```
+
+Query version and driver
+```bash
+nvidia-smi --query-gpu=index,name,vbios_version,driver_version --format=csv
+```
+
+Query temperature,power,clocks
+```bash
+nvidia-smi --query-gpu=index,power.draw,temperature.gpu,clocks.current.sm,clocks.current.memory,fan.speed --format=csv
+```
+
+Query GPU used memory of pids
+```bash
+nvidia-smi --query-compute-apps=gpu_uuid,pid,used_memory --format=csv
+```