https://github.com/jaymody/measure-cpu-cache-size

Empirically measuring CPU caches sizes using a simple C program.
https://github.com/jaymody/measure-cpu-cache-size

Last synced: 7 days ago
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Empirically measuring CPU caches sizes using a simple C program.

• Host: GitHub
• URL: https://github.com/jaymody/measure-cpu-cache-size
• Owner: jaymody
• Created: 2023-07-20T00:12:08.000Z (over 1 year ago)
• Default Branch: main
• Last Pushed: 2024-05-03T16:48:25.000Z (6 months ago)
• Last Synced: 2024-05-03T19:13:42.186Z (6 months ago)
• Language: C
• Size: 1.02 MB
• Stars: 2
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
A simple C program that can help empirically determine your CPU's cache size. Inspired by [Chapter 7.4 of ThinkOS "measuring cache performance"](https://greenteapress.com/thinkos/html/thinkos009.html#sec44).

Plotting is done in Python using [Plotly](https://plotly.com):

```shell

pip install plotly

```

The main program `cache.c` iterates an array at various sizes and strides and outputs the elapsed times for each stride/size pair as a csv, which can be directly piped into `plot.py` to plot the result:

```shell

gcc cache.c && ./a.out | python plot.py

```

This should output a file `plot.html`, which you can open in your browser.