[docs]add offline metrics docs

docs/source/developer-guide/profiling.md

@@ -0,0 +1,70 @@
+# Profiling
+
+UCM provides a file-based operation logging feature that records detailed operation data (load and dump operations) to log files. This feature is useful for offline analysis, debugging, and auditing.
+
+
+## Quick Start Guide
+
+### 1）: Configure Record Config
+
+Configure the `record_config` parameters in `/vllm-workspace/unified-cache-management/examples/ucm_config_example.yaml`. Ensure the following parameters are set:
+
+```yaml
+record_config:
+  enable: false
+  log_path: "/workspace/ucm_ops.log"
+  flush_size: 10
+  flush_interval: 5.0
+```
+
+### 2）: Start UCM Service
+
+Start the UCM service using the following command:
+
+```bash
+export MODEL_PATH=/home/models/Qwen2.5-14B-Instruct
+vllm serve ${MODEL_PATH} \
+--served-model-name vllm_cpu_offload \
+--max-model-len 20000 \
+--tensor-parallel-size 2 \
+--gpu_memory_utilization 0.87 \
+--trust-remote-code \
+--port 7800 \
+--kv-transfer-config \
+'{
+    "kv_connector": "UnifiedCacheConnectorV1",
+    "kv_connector_module_path": "ucm.integration.vllm.uc_connector",
+    "kv_role": "kv_both",
+    "kv_connector_extra_config": {
+        "UCM_CONFIG_FILE": "/workspace/unified-cache-management/examples/ucm_config_example.yaml"
+    }
+}'
+```
+
+You can view the operation logs in the log file specified by `log_path: "/workspace/ucm_ops.log"`.
+
+### 3）: Replay Data from Logs
+
+Pass the `log_path` (e.g., `/workspace/ucm_ops.log`) to the `test_trace.py` script in `ucm/profiling/` directory, then run the script to replay data from the logs:
+
+```bash
+python3 ucm/profiling/test_trace.py
+```
+
+The script will read the log data from the specified `log_path` and replay the operations recorded in the log file.
+
+## Configuration Parameters
+
+The operation logging feature is configured in the `record_config` section of the UCM configuration file (`ucm_config_example.yaml`). The following parameters control how operation logs are recorded:
+
+| Parameter | Default Value | Description |
+|-----------|---------------|-------------|
+| `enable` | `false` | Enable/disable operation logging. 
+| `log_path` | `"/workspace/ucm_ops.log"` | Full path to the log file where operation data will be written. 
+| `flush_size` | `10` | Number of log entries to buffer in memory before writing to disk. 
+| `flush_interval` | `5.0` | Time interval (in seconds) to force flush buffered logs to disk. 
+
+
+
+---
+

docs/source/index.md

@@ -64,6 +64,7 @@ user-guide/metrics/metrics
 :caption: Developer Guide
 :maxdepth: 1
 developer-guide/contribute
+developer-guide/profiling
 :::
 
 :::{toctree}