https://github.com/mtardy/bpfmemapie

A tool to render a pie chart of memory usage (bytes_memlock) of BPF maps on the system 🥧
https://github.com/mtardy/bpfmemapie

bpf ebpf maps memory pie

Last synced: 2 months ago
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A tool to render a pie chart of memory usage (bytes_memlock) of BPF maps on the system 🥧

• Host: GitHub
• URL: https://github.com/mtardy/bpfmemapie
• Owner: mtardy
• Created: 2024-06-18T19:22:06.000Z (6 months ago)
• Default Branch: main
• Last Pushed: 2024-06-19T11:44:49.000Z (6 months ago)
• Last Synced: 2024-09-30T04:20:53.104Z (3 months ago)
• Topics: bpf, ebpf, maps, memory, pie
• Language: Go
• Homepage:
• Size: 6.84 KB
• Stars: 18
• Watchers: 2
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# bpfmemapie 🥧

A tool to render a pie chart of memory usage (bytes_memlock) of BPF maps on the

system. Sorry for the naming, it's for **mem**apie, me**map**ie and mema**pie**,

so BPF mem map pie.

## Installation

```shell

go install github.com/mtardy/bpfmemapie@latest

```

## Usage

It needs bpftool to be installed and to execute as root for bpftool to list the

maps and their info.

```shell

sudo bpfmemapie

```

After opening http://localhost:8080 (you can change the port with `--port`), you

should see something like this:



The pie chart is interactive, you can click on the legend to hide/show entries

or hover on the pie to see the tooltip. You can also change how the "others"

category using the `threshold` URL query, for example 

http://localhost:8080/?threshold=1.

## Alternative

If you don't need the pie chart part, you can just use `bpftool` and `jq` to

see the same statistics:

```shell

sudo bpftool map -j | jq ' group_by(.name) | map({name: .[0].name, total_bytes_memlock: map(.bytes_memlock | tonumber) | add, maps: length}) | sort_by(.total_bytes_memlock)'

```