# Intel's Cache Allocation Technology
Intel’s Cache Allocation Technology (CAT) helps address shared resource concerns by providing software control of where data is allocated into the last-level cache (LLC), enabling isolation and prioritization of key applications.

## Acronyms
**CAT :** Cache Allocation Technology

**CMT :** Cache Monitoring Technology

**CDP :** Code and Data prioritization

**CLOS/COS :** Class of service


## Commands

Show current configuration

```bash
sudo pqos -s -v
```

*When I try to run the utility I get the following error messages:*

> WARN: Error opening file '/dev/cpu/0/msr'!
> ERROR: CDP detection error!
> ERROR: Fatal error encounter in CAT discovery!
> ERROR: discover_capabilities() error 1
> Error initializing PQoS library!

Run the following command:

```bash
sudo modprobe msr
```