Update README

README.md

@@ -1,6 +1,18 @@
 # sim_utils
-`sim_utils` is a collection of utilities to analyze profiling data generated by simulators.
+`sim_utils` is a collection of utilities to analyze perf data generated by instruction-accurate simulators.
 
 * `test.py` is the pre-commit test.
 * Current supported simulator: Intel® SDE
-* Python: 3.9 (or higher), SDE: latest (9.38)
+* Requires: Python: 3.9 (or higher), SDE: latest (9.38 or higher)
+
+
+`sim_utils` is capable of analyzing any workload runnable on Intel® SDE, and amis to support QEMU too.
+Personally tested cpu2017, cpuv8, geekbench, coremark-pro and accel2023.
+
+*Usage*:
+* Run you workloads on SDE with the suggested command in `cpu2017_collector.py -h`.
+* Write and run a collector for your workloads to generate the CSV file to describe the mappings between files. `cpu2017_collector.py` gives an example.
+* Then run `copy_files.py`, `for_each.py`, `combine_global_csv.py`, `diff_csv_for_f_wrapper.py`.
+* `send_report.py` can help send the data by mail.
+
+