Add helper functions to run specifc profiling analysis, starting wth …

…parallel scaling.

om3utils/profiling_analyses.py

@@ -0,0 +1,23 @@
+from pathlib import Path
+import xarray as xr
+
+from om3utils.payu_config_yaml import read_payu_config_yaml
+
+
+def scaling_ncpus(run_dir):
+    config_file = Path(run_dir) / "config.yaml"
+    config = read_payu_config_yaml(config_file.as_posix())
+    return config["ncpus"]
+
+
+def scaling_speedup(stats: xr.Dataset) -> xr.Dataset:
+    speedup = stats.tavg.sel(ncpus=stats["ncpus"].min()) / stats.tavg
+    speedup.name = "speedup"
+    return speedup
+
+
+def scaling_efficiency(stats: xr.Dataset) -> xr.Dataset:
+    speedup = scaling_speedup(stats)
+    eff = speedup / speedup.ncpus * 100 * stats["ncpus"].min()
+    eff.name = "parallel efficiency [%]"
+    return eff