jepa 0.1.0

CLI and TUI for the jepa-rs workspace
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129

use anyhow::{Context, Result};

use crate::cli::{CheckpointArgs, KeymapPreset};
use crate::fmt_utils::{format_params, truncate};

pub fn run(args: CheckpointArgs) -> Result<()> {
    let mappings = match args.keymap {
        KeymapPreset::Ijepa => jepa_compat::keymap::ijepa_vit_keymap(),
        KeymapPreset::Vjepa => jepa_compat::keymap::vjepa_vit_keymap(),
        KeymapPreset::None => vec![],
    };

    let checkpoint = jepa_compat::safetensors::load_checkpoint(&args.path, &mappings)
        .context("Failed to load checkpoint")?;

    println!();
    println!("  ╔══════════════════════════════════════════════════════════════╗");
    println!("  ║  Checkpoint Analysis                                       ║");
    println!("  ╠══════════════════════════════════════════════════════════════╣");
    println!(
        "  ║  File:       {:<47} ║",
        truncate(&args.path.display().to_string(), 47)
    );
    println!("  ║  Keymap:     {:<47} ║", format!("{:?}", args.keymap));
    println!("  ║  Tensors:    {:<47} ║", checkpoint.tensors.len());
    println!("  ║  Unmapped:   {:<47} ║", checkpoint.unmapped_keys.len());
    println!("  ╠══════════════════════════════════════════════════════════════╣");

    let mut total_params: usize = 0;
    let mut total_bytes: usize = 0;
    let mut keys: Vec<_> = checkpoint.tensors.keys().collect();
    keys.sort();

    if args.verbose {
        println!("  ║ {:<34} {:<12} {:>10} ║", "Tensor", "Shape", "Params");
        println!("  ╠══════════════════════════════════════════════════════════════╣");

        for key in &keys {
            if let Some(t) = checkpoint.tensors.get(*key) {
                let numel: usize = t.shape.iter().product();
                total_params += numel;
                total_bytes += numel * 4; // f32

                let shape_str = format_shape(&t.shape);
                println!(
                    "  ║ {:<34} {:<12} {:>10} ║",
                    truncate(key, 34),
                    shape_str,
                    format_params(numel),
                );
            }
        }
    } else {
        // Summary by layer groups
        let mut groups: std::collections::BTreeMap<String, (usize, usize)> =
            std::collections::BTreeMap::new();

        for key in &keys {
            let Some(t) = checkpoint.tensors.get(*key) else {
                continue;
            };
            let numel: usize = t.shape.iter().product();
            total_params += numel;
            total_bytes += numel * 4;

            let group = key.split('.').take(2).collect::<Vec<_>>().join(".");
            let entry = groups.entry(group).or_insert((0, 0));
            entry.0 += 1;
            entry.1 += numel;
        }

        println!(
            "  ║ {:<34} {:<10} {:>12} ║",
            "Layer Group", "Tensors", "Parameters"
        );
        println!("  ╠══════════════════════════════════════════════════════════════╣");

        for (group, (count, params)) in &groups {
            println!(
                "  ║ {:<34} {:<10} {:>12} ║",
                truncate(group, 34),
                count,
                format_params(*params),
            );
        }
    }

    println!("  ╠══════════════════════════════════════════════════════════════╣");
    println!(
        "  ║  Total parameters:  {:<39} ║",
        format_params(total_params)
    );
    println!(
        "  ║  Estimated size:    {:<39} ║",
        format_bytes(total_bytes)
    );
    println!("  ╚══════════════════════════════════════════════════════════════╝");

    if !checkpoint.unmapped_keys.is_empty() {
        println!();
        println!("  Unmapped keys ({}):", checkpoint.unmapped_keys.len());
        for key in checkpoint.unmapped_keys.iter().take(10) {
            println!("    - {key}");
        }
        if checkpoint.unmapped_keys.len() > 10 {
            println!("    ... and {} more", checkpoint.unmapped_keys.len() - 10);
        }
    }

    println!();
    Ok(())
}

fn format_shape(shape: &[usize]) -> String {
    let parts: Vec<String> = shape.iter().map(|d| d.to_string()).collect();
    format!("[{}]", parts.join(","))
}

fn format_bytes(bytes: usize) -> String {
    if bytes >= 1_073_741_824 {
        format!("{:.2} GB", bytes as f64 / 1_073_741_824.0)
    } else if bytes >= 1_048_576 {
        format!("{:.1} MB", bytes as f64 / 1_048_576.0)
    } else if bytes >= 1024 {
        format!("{:.1} KB", bytes as f64 / 1024.0)
    } else {
        format!("{bytes} B")
    }
}