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---------
Co-authored-by: HanClinto <hanclinto@gmail.com>
52 lines
2.7 KiB
Markdown
52 lines
2.7 KiB
Markdown
# llama.cpp/example/batched-bench
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Benchmark the batched decoding performance of `llama.cpp`
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## Usage
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There are 2 modes of operation:
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- `prompt not shared` - each batch has a separate prompt of size `PP` (i.e. `N_KV = B*(PP + TG)`)
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- `prompt is shared` - there is a common prompt of size `PP` used by all batches (i.e. `N_KV = PP + B*TG`)
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```bash
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./llama-batched-bench -m model.gguf -c 2048 -b 2048 -ub 512 -npp 128,256,512 -ntg 128,256 -npl 1,2,4,8,16,32 [-pps]
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# LLaMA 7B, F16, N_KV_MAX = 16384 (8GB), prompt not shared
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./llama-batched-bench -m ./models/llama-7b/ggml-model-f16.gguf -c 16384 -b 2048 -ub 512 -ngl 99
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# LLaMA 7B, Q8_0, N_KV_MAX = 16384 (8GB), prompt is shared
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./llama-batched-bench -m ./models/llama-7b/ggml-model-q8_0.gguf -c 16384 -b 2048 -ub 512 -ngl 99 -pps
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# custom set of batches
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./llama-batched-bench -m ./models/llama-7b/ggml-model-q8_0.gguf -c 2048 -b 512 -ub 512 -ngl 999 -npp 128,256,512 -ntg 128,256 -npl 1,2,4,8,16,32
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```
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## Sample results
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- `PP` - prompt tokens per batch
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- `TG` - generated tokens per batch
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- `B` - number of batches
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- `N_KV` - required KV cache size
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- `T_PP` - prompt processing time (i.e. time to first token)
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- `S_PP` - prompt processing speed (`(B*PP)/T_PP` or `PP/T_PP`)
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- `T_TG` - time to generate all batches
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- `S_TG` - text generation speed (`(B*TG)/T_TG`)
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- `T` - total time
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- `S` - total speed (i.e. all tokens / total time)
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| PP | TG | B | N_KV | T_PP s | S_PP t/s | T_TG s | S_TG t/s | T s | S t/s |
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|-------|--------|------|--------|----------|----------|----------|----------|----------|----------|
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| 128 | 128 | 1 | 256 | 0.108 | 1186.64 | 3.079 | 41.57 | 3.187 | 80.32 |
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| 128 | 128 | 2 | 512 | 0.198 | 1295.19 | 5.029 | 50.90 | 5.227 | 97.95 |
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| 128 | 128 | 4 | 1024 | 0.373 | 1373.96 | 6.878 | 74.44 | 7.251 | 141.23 |
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| 128 | 128 | 8 | 2048 | 0.751 | 1363.27 | 7.344 | 139.43 | 8.095 | 252.99 |
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| 128 | 128 | 16 | 4096 | 1.570 | 1304.68 | 8.455 | 242.23 | 10.024 | 408.60 |
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| 128 | 128 | 32 | 8192 | 3.408 | 1201.73 | 8.801 | 465.40 | 12.209 | 670.96 |
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| 128 | 256 | 1 | 384 | 0.107 | 1196.70 | 6.329 | 40.45 | 6.436 | 59.67 |
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| 128 | 256 | 2 | 768 | 0.194 | 1317.45 | 10.239 | 50.00 | 10.433 | 73.61 |
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| 128 | 256 | 4 | 1536 | 0.366 | 1399.03 | 13.960 | 73.35 | 14.326 | 107.22 |
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| 128 | 256 | 8 | 3072 | 0.751 | 1363.92 | 15.110 | 135.54 | 15.861 | 193.69 |
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| 128 | 256 | 16 | 6144 | 1.569 | 1304.93 | 18.073 | 226.64 | 19.642 | 312.80 |
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| 128 | 256 | 32 | 12288 | 3.409 | 1201.35 | 19.223 | 426.15 | 22.633 | 542.93 |
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