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Use prefix in LFM2 output location for WebGPU #1369

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Merged
merged 1 commit into from
Jul 17, 2025
Merged

Use prefix in LFM2 output location for WebGPU #1369

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7 changes: 5 additions & 2 deletions src/configs.js
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Original file line number Diff line number Diff line change
Expand Up @@ -264,6 +264,9 @@ function getNormalizedConfig(config) {
*/
export function getCacheShapes(config, options) {
if (config.model_type === 'lfm2') {
const pkv_prefix = options?.prefix ?? 'past_key_values';
const conv_prefix = pkv_prefix === 'present' ? 'present' : 'past';

// Custom caching mechanism for LFM2
/** @type {Record<string, number[]>} */
const cache_values = {};
Expand All @@ -274,10 +277,10 @@ export function getCacheShapes(config, options) {
for (let i = 0; i < layer_types.length; ++i) {
if (layer_types[i] === 'full_attention') {
for (const kv of ['key', 'value']) {
cache_values[`past_key_values.${i}.${kv}`] = [batch_size, num_key_value_heads, 0, head_dim];
cache_values[`${pkv_prefix}.${i}.${kv}`] = [batch_size, num_key_value_heads, 0, head_dim];
}
} else if (layer_types[i] === 'conv') {
cache_values[`past_conv.${i}`] = [batch_size, hidden_size, conv_L_cache];
cache_values[`${conv_prefix}_conv.${i}`] = [batch_size, hidden_size, conv_L_cache];
} else {
throw new Error(`Unsupported layer type: ${layer_types[i]}`);
}
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