# c2clat

A tool to measure memory latency between CPU cores.

Port of [this github repo][0] in rust.

[0]: https://github.com/rigtorp/c2clat

## Installation

Prerequisites:

- Linux
- Rust v1.63.0 or above

Install with:

```
cargo install c2clat
```

## Usage

On the command-line:

```
$ c2clat
 CPU    0    1    2    3
   0    0   63   27   63
   1   63    0   63   27
   2   27   63    0   63
   3   63   27   63    0
```

Generate a heatmap with gnuplot:

```
$ c2clat -p | gnuplot >heatmap.png
```

Limit tests to a subset of cores with taskset:

```
$ taskset -c 1,3 c2clat
 CPU    1    3
   1    0   27
   3   27    0
```

## License

SPDX-License-Identifier: ISC