add readme

readme.md

@@ -0,0 +1,9 @@
+This benchmark uses turbostat. Turbostat must be run as root. Thus, the benchmark must be run as root. Alternatively, non-root users can be enabled to run turbostat this way:
+
+```bash
+$ setcap cap_sys_admin,cap_sys_rawio,cap_sys_nice=+ep path/to/turbostat
+
+$ chmod +r /dev/cpu/*/msr
+
+$ chmod +r /dev/cpu_dma_latency
+```