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如何在Python中使用FlashMLA进行解码?

2025-09-05 1.4 K

Basic usage flow

在Python中使用FlashMLA进行解码主要包括以下几个步骤:

  1. 导入必要的模块:
    from flash_mla import get_mla_metadata, flash_mla_with_kvcache
  2. 准备输入数据:包括查询张量、KV缓存数据、块表等
  3. 获取元数据:
    tile_scheduler_metadata, num_splits = get_mla_metadata(cache_seqlens, s_q * h_q // h_kv, h_kv)
  4. 运行解码:
    o_i, lse_i = flash_mla_with_kvcache(q_i, kvcache_i, block_table, cache_seqlens, dv, tile_scheduler_metadata, num_splits, causal=True)

Parameter description

主要参数包括:

  • q_i:查询张量
  • kvcache_i:KV缓存数据
  • block_table:分页缓存的块表
  • cache_seqlens:定义KV缓存的序列长度

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