quick notes on running rpc profiling hands-on

ecp-am-2020/sessions/hands-on/rpc-profiling/README.md

+# Temporary notes
+
+same as initial example (sum), except:
+
+* run from a writeable directory on compute nodes, like `/gpfs/alpine/csc332/scratch/carns`
+* Add `-E MARGO_ENABLE_PROFILING=1` to jsrun command line arguments
+* after exiting job, generate profile.pdf as follows:
+
+```
+[carns@login5.summit carns]$ module load python/2.7.15-anaconda2-5.3.0
+[carns@login5.summit carns]$ margo-gen-profile
+
+
+*******************MARGO Profile Generator******************
+
+Reading CSV files from: /gpfs/alpine/csc332/scratch/carns
+Done.
+
+************************************************************
+```
+
+* Copy resulting profile.pdf to your computer and look at it. This example from sum looks a little funny because there is only one rpc, but you can see how much time it took to execute.