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tools: update llama-bench to include TTFT, E2E, ITL metrics #15643

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3d4bd77
tools: impl ttft, e2e, itl metrics to llama-bench
taronaeo Aug 28, 2025
a22b702
lint: fix missing newline from eof
taronaeo Aug 28, 2025
b5b2626
tools: fix return type mismatch
taronaeo Aug 28, 2025
c1e72f9
Revert "tools: fix return type mismatch"
taronaeo Aug 29, 2025
6b8431c
tools: update llama-bench docs
taronaeo Sep 4, 2025
405a7f9
tools: remove redundant first token check
taronaeo Sep 4, 2025
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142 changes: 99 additions & 43 deletions tools/llama-bench/README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -5,12 +5,13 @@ Performance testing tool for llama.cpp.
## Table of contents

1. [Syntax](#syntax)
2. [Examples](#examples)
2. [Metrics](#metrics)
3. [Examples](#examples)
1. [Text generation with different models](#text-generation-with-different-models)
2. [Prompt processing with different batch sizes](#prompt-processing-with-different-batch-sizes)
3. [Different numbers of threads](#different-numbers-of-threads)
4. [Different numbers of layers offloaded to the GPU](#different-numbers-of-layers-offloaded-to-the-gpu)
3. [Output formats](#output-formats)
4. [Output formats](#output-formats)
1. [Markdown](#markdown)
2. [CSV](#csv)
3. [JSON](#json)
Expand Down Expand Up @@ -79,6 +80,33 @@ Using the `-d <n>` option, each test can be run at a specified context depth, pr

For a description of the other options, see the [main example](../main/README.md).

## Metrics

Using the CSV output (`-o csv`), these metrics will be provided as average and standard deviations.

### Time to First Token (TTFT)

$$ T_{ttft} = t_{prompt} + t^{(1)}_{gen} $$

where
* $t_{prompt}$ : total prompt processing time
* $t^{(1)}_{gen}$ : token generation time for the first token

### End-to-End Request Latency (E2E)

$$ T_{e2e} = t_{prompt} + t_{gen} $$

where
* $t_{prompt}$ : total prompt processing time
* $t_{gen}$ : total token generation time

### Inter-token Latency (ITL)

$$ T_{itl} = \frac{T_{e2e} - T_{ttft}}{n\_gen - 1} $$

where
* $n\_{gen}$ : tokens to generate (`-n` flag)

## Examples

### Text generation with different models
Expand Down Expand Up @@ -190,9 +218,9 @@ $ ./llama-bench -o csv
```

```csv
build_commit,build_number,cpu_info,gpu_info,backends,model_filename,model_type,model_size,model_n_params,n_batch,n_ubatch,n_threads,cpu_mask,cpu_strict,poll,type_k,type_v,n_gpu_layers,split_mode,main_gpu,no_kv_offload,flash_attn,tensor_split,use_mmap,embeddings,n_prompt,n_gen,n_depth,test_time,avg_ns,stddev_ns,avg_ts,stddev_ts
"8cf427ff","5163","AMD Ryzen 7 7800X3D 8-Core Processor","NVIDIA GeForce RTX 4080","CUDA","models/Qwen2.5-7B-Instruct-Q4_K_M.gguf","qwen2 7B Q4_K - Medium","4677120000","7615616512","2048","512","8","0x0","0","50","f16","f16","99","layer","0","0","0","0.00","1","0","512","0","0","2025-04-24T11:57:09Z","70285660","982040","7285.676949","100.064434"
"8cf427ff","5163","AMD Ryzen 7 7800X3D 8-Core Processor","NVIDIA GeForce RTX 4080","CUDA","models/Qwen2.5-7B-Instruct-Q4_K_M.gguf","qwen2 7B Q4_K - Medium","4677120000","7615616512","2048","512","8","0x0","0","50","f16","f16","99","layer","0","0","0","0.00","1","0","0","128","0","2025-04-24T11:57:10Z","1067431600","3834831","119.915244","0.430617"
build_commit,build_number,cpu_info,gpu_info,backends,model_filename,model_type,model_size,model_n_params,n_batch,n_ubatch,n_threads,cpu_mask,cpu_strict,poll,type_k,type_v,n_gpu_layers,split_mode,main_gpu,no_kv_offload,flash_attn,tensor_split,tensor_buft_overrides,use_mmap,embeddings,no_op_offload,n_prompt,n_gen,n_depth,test_time,avg_ns,stddev_ns,avg_ts,stddev_ts,avg_ttft_ms,stddev_ttft_ms,avg_e2e_ms,stddev_e2e_ms,avg_itl_ms,stddev_itl_ms
"69f7e7116","6321","OpenBLAS, CPU","","BLAS","models/granite-3.3-2b-instruct-be.IQ4_XS.gguf","granite 3B IQ4_XS - 4.25 bpw","1395281392","2533539840","2048","512","8","0x0","0","50","f16","f16","99","layer","0","0","0","0.00","none","1","0","0","512","0","0","2025-08-28T16:57:00Z","6313008195","4119608","81.102409","0.052946","0.000000","0.000000","6313.008195","4.118842","0.000000","0.000000"
"69f7e7116","6321","OpenBLAS, CPU","","BLAS","models/granite-3.3-2b-instruct-be.IQ4_XS.gguf","granite 3B IQ4_XS - 4.25 bpw","1395281392","2533539840","2048","512","8","0x0","0","50","f16","f16","99","layer","0","0","0","0.00","none","1","0","0","0","128","0","2025-08-28T16:57:38Z","5510702782","66734031","23.230240","0.280041","42.929458","0.403130","5510.702782","66.734011","43.053333","0.522383"
```

### JSON
Expand All @@ -204,15 +232,15 @@ $ ./llama-bench -o json
```json
[
{
"build_commit": "8cf427ff",
"build_number": 5163,
"cpu_info": "AMD Ryzen 7 7800X3D 8-Core Processor",
"gpu_info": "NVIDIA GeForce RTX 4080",
"backends": "CUDA",
"model_filename": "models/Qwen2.5-7B-Instruct-Q4_K_M.gguf",
"model_type": "qwen2 7B Q4_K - Medium",
"model_size": 4677120000,
"model_n_params": 7615616512,
"build_commit": "69f7e7116",
"build_number": 6321,
"cpu_info": "OpenBLAS, CPU",
"gpu_info": "",
"backends": "BLAS",
"model_filename": "models/granite-3.3-2b-instruct-be.IQ4_XS.gguf",
"model_type": "granite 3B IQ4_XS - 4.25 bpw",
"model_size": 1395281392,
"model_n_params": 2533539840,
"n_batch": 2048,
"n_ubatch": 512,
"n_threads": 8,
Expand All @@ -227,29 +255,39 @@ $ ./llama-bench -o json
"no_kv_offload": false,
"flash_attn": false,
"tensor_split": "0.00",
"tensor_buft_overrides": "none",
"use_mmap": true,
"embeddings": false,
"no_op_offload": 0,
"n_prompt": 512,
"n_gen": 0,
"n_depth": 0,
"test_time": "2025-04-24T11:58:50Z",
"avg_ns": 72135640,
"stddev_ns": 1453752,
"avg_ts": 7100.002165,
"stddev_ts": 140.341520,
"samples_ns": [ 74601900, 71632900, 71745200, 71952700, 70745500 ],
"samples_ts": [ 6863.1, 7147.55, 7136.37, 7115.79, 7237.21 ]
"test_time": "2025-08-28T17:01:34Z",
"avg_ns": 6276064173,
"stddev_ns": 34323113,
"avg_ts": 81.581735,
"stddev_ts": 0.444487,
"avg_ttft_ms": 0.000000,
"stddev_ttft_ms": 0.000000,
"avg_e2e_ms": 6276.064174,
"stddev_e2e_ms": 34.322931,
"avg_itl_ms": 0.000000,
"stddev_itl_ms": 0.000000,
"samples_ns": [ 6255489794, 6293138165, 6328736359, 6254136857, 6248819694 ],
"samples_ts": [ 81.8481, 81.3585, 80.9008, 81.8658, 81.9355 ],
"samples_ttft_ns": [ ],
"samples_itl_ns": [ ]
},
{
"build_commit": "8cf427ff",
"build_number": 5163,
"cpu_info": "AMD Ryzen 7 7800X3D 8-Core Processor",
"gpu_info": "NVIDIA GeForce RTX 4080",
"backends": "CUDA",
"model_filename": "models/Qwen2.5-7B-Instruct-Q4_K_M.gguf",
"model_type": "qwen2 7B Q4_K - Medium",
"model_size": 4677120000,
"model_n_params": 7615616512,
"build_commit": "69f7e7116",
"build_number": 6321,
"cpu_info": "OpenBLAS, CPU",
"gpu_info": "",
"backends": "BLAS",
"model_filename": "models/granite-3.3-2b-instruct-be.IQ4_XS.gguf",
"model_type": "granite 3B IQ4_XS - 4.25 bpw",
"model_size": 1395281392,
"model_n_params": 2533539840,
"n_batch": 2048,
"n_ubatch": 512,
"n_threads": 8,
Expand All @@ -264,18 +302,28 @@ $ ./llama-bench -o json
"no_kv_offload": false,
"flash_attn": false,
"tensor_split": "0.00",
"tensor_buft_overrides": "none",
"use_mmap": true,
"embeddings": false,
"no_op_offload": 0,
"n_prompt": 0,
"n_gen": 128,
"n_depth": 0,
"test_time": "2025-04-24T11:58:51Z",
"avg_ns": 1076767880,
"stddev_ns": 9449585,
"avg_ts": 118.881588,
"stddev_ts": 1.041811,
"samples_ns": [ 1075361300, 1065089400, 1071761200, 1081934900, 1089692600 ],
"samples_ts": [ 119.03, 120.178, 119.43, 118.307, 117.464 ]
"test_time": "2025-08-28T17:02:12Z",
"avg_ns": 5613693967,
"stddev_ns": 9159226,
"avg_ts": 22.801434,
"stddev_ts": 0.037157,
"avg_ttft_ms": 43.766002,
"stddev_ttft_ms": 0.161696,
"avg_e2e_ms": 5613.693967,
"stddev_e2e_ms": 9.158920,
"avg_itl_ms": 43.857701,
"stddev_itl_ms": 0.073127,
"samples_ns": [ 5617273869, 5609876644, 5628089934, 5607197607, 5606031783 ],
"samples_ts": [ 22.7869, 22.8169, 22.7431, 22.8278, 22.8325 ],
"samples_ttft_ns": [ 43584301, 43738022, 43642511, 43936642, 43928534 ],
"samples_itl_ns": [ 4.38873e+07, 4.38279e+07, 4.3972e+07, 4.38052e+07, 4.37961e+07 ]
}
]
```
Expand All @@ -288,8 +336,8 @@ $ ./llama-bench -o jsonl
```

```json lines
{"build_commit": "8cf427ff", "build_number": 5163, "cpu_info": "AMD Ryzen 7 7800X3D 8-Core Processor", "gpu_info": "NVIDIA GeForce RTX 4080", "backends": "CUDA", "model_filename": "models/Qwen2.5-7B-Instruct-Q4_K_M.gguf", "model_type": "qwen2 7B Q4_K - Medium", "model_size": 4677120000, "model_n_params": 7615616512, "n_batch": 2048, "n_ubatch": 512, "n_threads": 8, "cpu_mask": "0x0", "cpu_strict": false, "poll": 50, "type_k": "f16", "type_v": "f16", "n_gpu_layers": 99, "split_mode": "layer", "main_gpu": 0, "no_kv_offload": false, "flash_attn": false, "tensor_split": "0.00", "use_mmap": true, "embeddings": false, "n_prompt": 512, "n_gen": 0, "n_depth": 0, "test_time": "2025-04-24T11:59:33Z", "avg_ns": 70497220, "stddev_ns": 883196, "avg_ts": 7263.609157, "stddev_ts": 90.940578, "samples_ns": [ 71551000, 71222800, 70364100, 69439100, 69909100 ],"samples_ts": [ 7155.74, 7188.71, 7276.44, 7373.37, 7323.8 ]}
{"build_commit": "8cf427ff", "build_number": 5163, "cpu_info": "AMD Ryzen 7 7800X3D 8-Core Processor", "gpu_info": "NVIDIA GeForce RTX 4080", "backends": "CUDA", "model_filename": "models/Qwen2.5-7B-Instruct-Q4_K_M.gguf", "model_type": "qwen2 7B Q4_K - Medium", "model_size": 4677120000, "model_n_params": 7615616512, "n_batch": 2048, "n_ubatch": 512, "n_threads": 8, "cpu_mask": "0x0", "cpu_strict": false, "poll": 50, "type_k": "f16", "type_v": "f16", "n_gpu_layers": 99, "split_mode": "layer", "main_gpu": 0, "no_kv_offload": false, "flash_attn": false, "tensor_split": "0.00", "use_mmap": true, "embeddings": false, "n_prompt": 0, "n_gen": 128, "n_depth": 0, "test_time": "2025-04-24T11:59:33Z", "avg_ns": 1068078400, "stddev_ns": 6279455, "avg_ts": 119.844681, "stddev_ts": 0.699739, "samples_ns": [ 1066331700, 1064864900, 1079042600, 1063328400, 1066824400 ],"samples_ts": [ 120.038, 120.203, 118.624, 120.377, 119.982 ]}
{"build_commit": "69f7e7116", "build_number": 6321, "cpu_info": "OpenBLAS, CPU", "gpu_info": "", "backends": "BLAS", "model_filename": "models/granite-3.3-2b-instruct-be.IQ4_XS.gguf", "model_type": "granite 3B IQ4_XS - 4.25 bpw", "model_size": 1395281392, "model_n_params": 2533539840, "n_batch": 2048, "n_ubatch": 512, "n_threads": 8, "cpu_mask": "0x0", "cpu_strict": false, "poll": 50, "type_k": "f16", "type_v": "f16", "n_gpu_layers": 99, "split_mode": "layer", "main_gpu": 0, "no_kv_offload": false, "flash_attn": false, "tensor_split": "0.00", "tensor_buft_overrides": "none", "use_mmap": true, "embeddings": false, "no_op_offload": 0, "n_prompt": 512, "n_gen": 0, "n_depth": 0, "test_time": "2025-08-28T17:05:56Z", "avg_ns": 6287855687, "stddev_ns": 24678326, "avg_ts": 81.427806, "stddev_ts": 0.318701, "avg_ttft_ms": 0.000000, "stddev_ttft_ms": 0.000000, "avg_e2e_ms": 6287.855687, "stddev_e2e_ms": 24.678263, "avg_itl_ms": 0.000000, "stddev_itl_ms": 0.000000, "samples_ns": [ 6278179171, 6280580749, 6291595583, 6327539008, 6261383925 ],"samples_ts": [ 81.5523, 81.5211, 81.3784, 80.9161, 81.7711 ],"samples_ttft_ns": [ ],"samples_itl_ns": [ ]}
{"build_commit": "69f7e7116", "build_number": 6321, "cpu_info": "OpenBLAS, CPU", "gpu_info": "", "backends": "BLAS", "model_filename": "models/granite-3.3-2b-instruct-be.IQ4_XS.gguf", "model_type": "granite 3B IQ4_XS - 4.25 bpw", "model_size": 1395281392, "model_n_params": 2533539840, "n_batch": 2048, "n_ubatch": 512, "n_threads": 8, "cpu_mask": "0x0", "cpu_strict": false, "poll": 50, "type_k": "f16", "type_v": "f16", "n_gpu_layers": 99, "split_mode": "layer", "main_gpu": 0, "no_kv_offload": false, "flash_attn": false, "tensor_split": "0.00", "tensor_buft_overrides": "none", "use_mmap": true, "embeddings": false, "no_op_offload": 0, "n_prompt": 0, "n_gen": 128, "n_depth": 0, "test_time": "2025-08-28T17:06:33Z", "avg_ns": 5498943758, "stddev_ns": 137464807, "avg_ts": 23.288635, "stddev_ts": 0.571937, "avg_ttft_ms": 43.519547, "stddev_ttft_ms": 1.625999, "avg_e2e_ms": 5498.943758, "stddev_e2e_ms": 137.464807, "avg_itl_ms": 42.956096, "stddev_itl_ms": 1.075456, "samples_ns": [ 5563859512, 5712210875, 5398301124, 5410462401, 5409884878 ],"samples_ts": [ 23.0056, 22.4081, 23.7112, 23.6579, 23.6604 ],"samples_ttft_ns": [ 46182840, 43768889, 43176480, 42210650, 42258878 ],"samples_itl_ns": [ 4.34463e+07, 4.46334e+07, 4.21663e+07, 4.22697e+07, 4.22648e+07 ]}
```


Expand All @@ -302,7 +350,7 @@ $ ./llama-bench -o sql
```

```sql
CREATE TABLE IF NOT EXISTS test (
CREATE TABLE IF NOT EXISTS llama_bench (
build_commit TEXT,
build_number INTEGER,
cpu_info TEXT,
Expand All @@ -326,18 +374,26 @@ CREATE TABLE IF NOT EXISTS test (
no_kv_offload INTEGER,
flash_attn INTEGER,
tensor_split TEXT,
tensor_buft_overrides TEXT,
use_mmap INTEGER,
embeddings INTEGER,
no_op_offload INTEGER,
n_prompt INTEGER,
n_gen INTEGER,
n_depth INTEGER,
test_time TEXT,
avg_ns INTEGER,
stddev_ns INTEGER,
avg_ts REAL,
stddev_ts REAL
stddev_ts REAL,
avg_ttft_ms REAL,
stddev_ttft_ms REAL,
avg_e2e_ms REAL,
stddev_e2e_ms REAL,
avg_itl_ms REAL,
stddev_itl_ms REAL
);

INSERT INTO test (build_commit, build_number, cpu_info, gpu_info, backends, model_filename, model_type, model_size, model_n_params, n_batch, n_ubatch, n_threads, cpu_mask, cpu_strict, poll, type_k, type_v, n_gpu_layers, split_mode, main_gpu, no_kv_offload, flash_attn, tensor_split, use_mmap, embeddings, n_prompt, n_gen, n_depth, test_time, avg_ns, stddev_ns, avg_ts, stddev_ts) VALUES ('8cf427ff', '5163', 'AMD Ryzen 7 7800X3D 8-Core Processor', 'NVIDIA GeForce RTX 4080', 'CUDA', 'models/Qwen2.5-7B-Instruct-Q4_K_M.gguf', 'qwen2 7B Q4_K - Medium', '4677120000', '7615616512', '2048', '512', '8', '0x0', '0', '50', 'f16', 'f16', '99', 'layer', '0', '0', '0', '0.00', '1', '0', '512', '0', '0', '2025-04-24T12:00:08Z', '69905000', '519516', '7324.546977', '54.032613');
INSERT INTO test (build_commit, build_number, cpu_info, gpu_info, backends, model_filename, model_type, model_size, model_n_params, n_batch, n_ubatch, n_threads, cpu_mask, cpu_strict, poll, type_k, type_v, n_gpu_layers, split_mode, main_gpu, no_kv_offload, flash_attn, tensor_split, use_mmap, embeddings, n_prompt, n_gen, n_depth, test_time, avg_ns, stddev_ns, avg_ts, stddev_ts) VALUES ('8cf427ff', '5163', 'AMD Ryzen 7 7800X3D 8-Core Processor', 'NVIDIA GeForce RTX 4080', 'CUDA', 'models/Qwen2.5-7B-Instruct-Q4_K_M.gguf', 'qwen2 7B Q4_K - Medium', '4677120000', '7615616512', '2048', '512', '8', '0x0', '0', '50', 'f16', 'f16', '99', 'layer', '0', '0', '0', '0.00', '1', '0', '0', '128', '0', '2025-04-24T12:00:09Z', '1063608780', '4464130', '120.346696', '0.504647');
INSERT INTO llama_bench (build_commit, build_number, cpu_info, gpu_info, backends, model_filename, model_type, model_size, model_n_params, n_batch, n_ubatch, n_threads, cpu_mask, cpu_strict, poll, type_k, type_v, n_gpu_layers, split_mode, main_gpu, no_kv_offload, flash_attn, tensor_split, tensor_buft_overrides, use_mmap, embeddings, no_op_offload, n_prompt, n_gen, n_depth, test_time, avg_ns, stddev_ns, avg_ts, stddev_ts, avg_ttft_ms, stddev_ttft_ms, avg_e2e_ms, stddev_e2e_ms, avg_itl_ms, stddev_itl_ms) VALUES ('69f7e7116', '6321', 'OpenBLAS, CPU', '', 'BLAS', 'models/granite-3.3-2b-instruct-be.IQ4_XS.gguf', 'granite 3B IQ4_XS - 4.25 bpw', '1395281392', '2533539840', '2048', '512', '8', '0x0', '0', '50', 'f16', 'f16', '99', 'layer', '0', '0', '0', '0.00', 'none', '1', '0', '0', '512', '0', '0', '2025-08-28T17:08:13Z', '6326649352', '9345621', '80.927655', '0.119504', '0.000000', '0.000000', '6326.649353', '9.344944', '0.000000', '0.000000');
INSERT INTO llama_bench (build_commit, build_number, cpu_info, gpu_info, backends, model_filename, model_type, model_size, model_n_params, n_batch, n_ubatch, n_threads, cpu_mask, cpu_strict, poll, type_k, type_v, n_gpu_layers, split_mode, main_gpu, no_kv_offload, flash_attn, tensor_split, tensor_buft_overrides, use_mmap, embeddings, no_op_offload, n_prompt, n_gen, n_depth, test_time, avg_ns, stddev_ns, avg_ts, stddev_ts, avg_ttft_ms, stddev_ttft_ms, avg_e2e_ms, stddev_e2e_ms, avg_itl_ms, stddev_itl_ms) VALUES ('69f7e7116', '6321', 'OpenBLAS, CPU', '', 'BLAS', 'models/granite-3.3-2b-instruct-be.IQ4_XS.gguf', 'granite 3B IQ4_XS - 4.25 bpw', '1395281392', '2533539840', '2048', '512', '8', '0x0', '0', '50', 'f16', 'f16', '99', 'layer', '0', '0', '0', '0.00', 'none', '1', '0', '0', '0', '128', '0', '2025-08-28T17:08:51Z', '5640474378', '40328612', '22.694063', '0.163702', '44.155657', '0.086653', '5640.474378', '40.328543', '44.065502', '0.317725');
```
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