Update README.md

ESMF_profiling/README.md

@@ -1,5 +1,5 @@
 # ESMF Profiling tool
-The **ESMF Profiling tool** is a Python-based tool designed to read and process performance profile data from ESMF profiling log files. It provides a structured way to extract hierachical timing and computational stats for various regions within ESMF log files, enabling detailed performance analysis.
+The **ESMF Profiling tool** is a Python-based tool designed to read and process performance profile data from ESMF profiling log files for **ACCESS-OM3**. It provides a structured way to extract hierachical timing and computational stats for various regions within ESMF log files, enabling detailed performance analysis.
 
 ## Directory structure
 ```
@@ -13,6 +13,7 @@ The **ESMF Profiling tool** is a Python-based tool designed to read and process
     - handles the input ESMF profile files.
     - constructs the hierarchical data structure.
     - outputs runtimes for specific regions.
+    - supports both exact and prefix matching for `regionNames` in runtime collection - an example is provided in this script.
  2. `esmfRegion.py`: 
     - defines the ESMFRegion class.
     - represents individual ESMF regions, capturing performance metrics.
@@ -28,17 +29,27 @@ env:
   ESMF_RUNTIME_PROFILE: "ON"
   ESMF_RUNTIME_PROFILE_OUTPUT: "TEXT SUMMARY"
 ```
+where `TEXT` collects profiling logs per PET, and `SUMMARY` collects profiling data in a single summary text file that aggregates timings over multiple PETs. Details can be found [here](https://earthsystemmodeling.org/docs/nightly/develop/ESMF_refdoc/node6.html#SECTION060140000000000000000).
+
 After running the configuration, specify the path to the profiling logs, along with any specific regions of interest.
 
 One example for demonstration:
 ----------
 ```python
 # Collect runtime info for specific regions
 ESMF_path = ['/path/to/your/ESMF/output/files']
-region_names = ['[ESMF]', '[ESMF]/[ensemble] RunPhase1/[ESM0001] RunPhase1/[OCN] RunPhase1']
+regionNames=[
+    "[ESMF]",
+    "[ESMF]/[ensemble] RunPhase1/[ESM0001] RunPhase1/[OCN] RunPhase1",
+    "[ESMF]/[ensemble] RunPhase1/[ESM0001] RunPhase1/[MED]",
+]
 profile_prefix = 'ESMF_Profile.'
 esmf_summary = True  # Set to True for summary profiling
 index = 2  # Choose the metric above to extract (e.g., mean time for summary profiling)
-runtime_totals = collect_runtime_tot(ESMF_path, regionNames=region_names, profile_prefix=profile_prefix, esmf_summary=esmf_summary, index=index)
+runtime_totals = collect_runtime_tot(ESMF_path,
+                                     regionNames=region_names,
+                                     profile_prefix=profile_prefix,
+                                     esmf_summary=esmf_summary,
+                                     index=index)
 print(runtime_totals)
 ```