add no root requirements for metrics to readme (#91)

README.md

@@ -70,6 +70,14 @@ Metric files:
 ```
 The `metrics` command supports two modes -- default and "live". Default mode behaves as above -- metrics are collected and saved into files for review.  The "live" mode prints the metrics in a selected format, e.g., CSV, JSON, to stdout where they can be viewed in the console and/or redirected into a file or observability pipeline.
 
+##### No Root Permissions
+If sudo is not possible and running as the root user is not possible, then a user may request the following changes be made to the target system by an administrator:
+- sysctl -w kernel.perf_event_paranoid=0
+- sysctl -w kernel.nmi_watchdog=0
+- write '125' to all perf_event_mux_interval_ms files found under /sys/devices/*, e.g., `for i in $(find /sys/devices -name perf_event_mux_interval_ms); do echo 125 > $i; done`
+
+Recommend returning these settings to their prior values when analysis with PerfSpect is complete.
+
 See `perfspect metrics -h` for the extensive set of options and examples.
 
 #### Report Command