Add io_read/write to README.md
@@ -128,6 +128,7 @@ A partial list of parameters are below. See the config file for a complete list.
| `log_duration` | Set amount of time the logging will run for (in seconds) |
| `vsync`<br> `gl_vsync` | Set vsync for OpenGL or Vulkan |
| `media_player` | Show Spotify metadata |
+| `io_read` `io_write` | Show non-cached IO read/write in MiB/s |
| `pci_dev` | Select GPU device in multi-gpu setups |
| `version` | Shows current mangohud version |
