kv model size is twice large then llama.cpp/main

[hengjiUSTC]

1. Issue one
   I use following code to lode model model, tokenizer = LlamaCppModel.from_pretrained(MODEL_PATH) and got this print

llama_model_load: loading model from '/Users/jiheng/Documents/meta/code/fc/llama.cpp/models/ggml-model-q4_1_FineTuned.bin' - please wait ...
llama_model_load: n_vocab = 32000
llama_model_load: n_ctx   = 512
llama_model_load: n_embd  = 5120
llama_model_load: n_mult  = 256
llama_model_load: n_head  = 40
llama_model_load: n_layer = 40
llama_model_load: n_rot   = 128
llama_model_load: f16     = 3
llama_model_load: n_ff    = 13824
llama_model_load: n_parts = 2
llama_model_load: type    = 2
llama_model_load: ggml map size = 9311.39 MB
llama_model_load: ggml ctx size = 101.25 KB
llama_model_load: mem required  = 11359.49 MB (+ 3216.00 MB per state)
llama_model_load: loading tensors from '/Users/jiheng/Documents/meta/code/fc/llama.cpp/models/ggml-model-q4_1_FineTuned.bin'
llama_model_load: model size =  9310.96 MB / num tensors = 363
llama_init_from_file: kv self size  =  800.00 MB
AVX = 1 | AVX2 = 1 | AVX512 = 0 | FMA = 1 | NEON = 0 | ARM_FMA = 0 | F16C = 1 | FP16_VA = 0 | WASM_SIMD = 0 | BLAS = 1 | SSE3 = 1 | VSX = 0 | 

but when loading using llama.cpp/main

llama_model_load: loading model from 'models/ggml-model-q4_1_Finetuned.bin' - please wait ...
llama_model_load: n_vocab = 32000
llama_model_load: n_ctx   = 512
llama_model_load: n_embd  = 5120
llama_model_load: n_mult  = 256
llama_model_load: n_head  = 40
llama_model_load: n_layer = 40
llama_model_load: n_rot   = 128
llama_model_load: f16     = 3
llama_model_load: n_ff    = 13824
llama_model_load: n_parts = 2
llama_model_load: type    = 2
llama_model_load: ggml map size = 9311.39 MB
llama_model_load: ggml ctx size = 101.25 KB
llama_model_load: mem required  = 11359.49 MB (+ 1608.00 MB per state)
llama_model_load: loading tensors from 'models/ggml-model-q4_1_Finetuned.bin'
llama_model_load: model size =  9310.96 MB / num tensors = 363
llama_init_from_file: kv self size  =  400.00 MB

system_info: n_threads = 7 / 16 | AVX = 1 | AVX2 = 1 | AVX512 = 0 | FMA = 1 | NEON = 0 | ARM_FMA = 0 | F16C = 1 | FP16_VA = 0 | WASM_SIMD = 0 | BLAS = 1 | SSE3 = 1 | VSX = 0 | 

The kv self size is different.

2. for this specific model, I couldn't get any result back from llama-cpp-python, but llamacpp/main gives correct response.

[hengjiUSTC]

Probably related to #49. Same slow is also observed.

[abetlen]

@hengjiUSTC those outputs look slightly different, do you mind cloning the repo and comparing against the version of llama.cpp that's pinned here? It should be fairly recent (just updated earlier today)

[hengjiUSTC]

I updated both llama.cpp repo and vendor/llama.cpp to same version (newest) and rebuild cpp code. Still kv self size is different. Link to model https://huggingface.co/Pi3141/gpt4-x-alpaca-native-13B-ggml/tree/main, and also happens for another model https://huggingface.co/Pi3141/alpaca-native-13B-ggml/tree/main. I think it isn't caused by version mismatch of llama.cpp code.
I use very simple code in python:

>>> from llama_cpp import Llama
>>> llm = Llama(model_path="/Users/jiheng/Documents/meta/code/llama.cpp/models/ggml-model-q4_1_FineTuned.bin")
llama.cpp: loading model from /Users/jiheng/Documents/meta/code/llama.cpp/models/ggml-model-q4_1_FineTuned.bin
llama_model_load_internal: format     = ggjt v1 (latest)
llama_model_load_internal: n_vocab    = 32000
llama_model_load_internal: n_ctx      = 512
llama_model_load_internal: n_embd     = 5120
llama_model_load_internal: n_mult     = 256
llama_model_load_internal: n_head     = 40
llama_model_load_internal: n_layer    = 40
llama_model_load_internal: n_rot      = 128
llama_model_load_internal: f16        = 3
llama_model_load_internal: n_ff       = 13824
llama_model_load_internal: n_parts    = 1
llama_model_load_internal: model size = 13B
llama_model_load_internal: ggml ctx size =  73.73 KB
llama_model_load_internal: mem required  = 11359.03 MB (+ 3216.00 MB per state)
llama_init_from_file: kv self size  =  800.00 MB
AVX = 1 | AVX2 = 1 | AVX512 = 0 | FMA = 1 | NEON = 0 | ARM_FMA = 0 | F16C = 1 | FP16_VA = 0 | WASM_SIMD = 0 | BLAS = 1 | SSE3 = 1 | VSX = 0 | 

And on llama.cpp side:

./main -m models/ggml-model-q4_1_Finetuned.bin --color -f ./prompts/alpaca.txt -ins -b 256 --top_k 10000 --temp 0.2 --repeat_penalty 1 -t 7

main: seed = 1681179629
llama.cpp: loading model from models/ggml-model-q4_1_Finetuned.bin
llama_model_load_internal: format     = ggjt v1 (latest)
llama_model_load_internal: n_vocab    = 32000
llama_model_load_internal: n_ctx      = 512
llama_model_load_internal: n_embd     = 5120
llama_model_load_internal: n_mult     = 256
llama_model_load_internal: n_head     = 40
llama_model_load_internal: n_layer    = 40
llama_model_load_internal: n_rot      = 128
llama_model_load_internal: f16        = 3
llama_model_load_internal: n_ff       = 13824
llama_model_load_internal: n_parts    = 1
llama_model_load_internal: model size = 13B
llama_model_load_internal: ggml ctx size =  73.73 KB
llama_model_load_internal: mem required  = 11359.03 MB (+ 1608.00 MB per state)
llama_init_from_file: kv self size  =  400.00 MB

system_info: n_threads = 7 / 16 | AVX = 1 | AVX2 = 1 | AVX512 = 0 | FMA = 1 | NEON = 0 | ARM_FMA = 0 | F16C = 1 | FP16_VA = 0 | WASM_SIMD = 0 | BLAS = 1 | SSE3 = 1 | VSX = 0 | 
main: interactive mode on.
Reverse prompt: '### Instruction:

'
sampling: temp = 0.200000, top_k = 10000, top_p = 0.950000, repeat_last_n = 64, repeat_penalty = 1.000000
generate: n_ctx = 512, n_batch = 256, n_predict = 128, n_keep = 21

[hengjiUSTC]

Changed a computer and using model https://huggingface.co/Pi3141/alpaca-native-13B-ggml/tree/main, result still the same.
llama-cpp-python. size is doubled

>>> from llama_cpp import Llama
>>> lm = Llama(model_path="/Users/jiheng/Downloads/ggml-model-q4_1.bin")
llama.cpp: loading model from /Users/jiheng/Downloads/ggml-model-q4_1.bin
llama_model_load_internal: format     = ggjt v1 (latest)
llama_model_load_internal: n_vocab    = 32000
llama_model_load_internal: n_ctx      = 512
llama_model_load_internal: n_embd     = 6656
llama_model_load_internal: n_mult     = 256
llama_model_load_internal: n_head     = 52
llama_model_load_internal: n_layer    = 60
llama_model_load_internal: n_rot      = 128
llama_model_load_internal: f16        = 3
llama_model_load_internal: n_ff       = 17920
llama_model_load_internal: n_parts    = 1
llama_model_load_internal: model size = 30B
llama_model_load_internal: ggml ctx size = 110.30 KB
llama_model_load_internal: mem required  = 25573.12 MB (+ 6248.00 MB per state)
llama_init_from_file: kv self size  = 1560.00 MB
AVX = 1 | AVX2 = 1 | AVX512 = 0 | FMA = 1 | NEON = 0 | ARM_FMA = 0 | F16C = 1 | FP16_VA = 0 | WASM_SIMD = 0 | BLAS = 1 | SSE3 = 1 | VSX = 0 |

llama.cpp

ource examples/alpaca.sh                                                                                                                   ✔  13s 
main: seed = 1681185433
llama.cpp: loading model from /Users/jiheng/Downloads/ggml-model-q4_1.bin
llama_model_load_internal: format     = ggjt v1 (latest)
llama_model_load_internal: n_vocab    = 32000
llama_model_load_internal: n_ctx      = 512
llama_model_load_internal: n_embd     = 6656
llama_model_load_internal: n_mult     = 256
llama_model_load_internal: n_head     = 52
llama_model_load_internal: n_layer    = 60
llama_model_load_internal: n_rot      = 128
llama_model_load_internal: f16        = 3
llama_model_load_internal: n_ff       = 17920
llama_model_load_internal: n_parts    = 1
llama_model_load_internal: model size = 30B
llama_model_load_internal: ggml ctx size = 110.30 KB
llama_model_load_internal: mem required  = 25573.12 MB (+ 3124.00 MB per state)
llama_init_from_file: kv self size  =  780.00 MB

system_info: n_threads = 7 / 12 | AVX = 1 | AVX2 = 1 | AVX512 = 0 | FMA = 1 | NEON = 0 | ARM_FMA = 0 | F16C = 1 | FP16_VA = 0 | WASM_SIMD = 0 | BLAS = 1 | SSE3 = 1 | VSX = 0 | 
main: interactive mode on.
Reverse prompt: '### Instruction:

'
sampling: temp = 0.200000, top_k = 10000, top_p = 0.950000, repeat_last_n = 64, repeat_penalty = 1.000000
generate: n_ctx = 512, n_batch = 256, n_predict = 128, n_keep = 21

Result is same even I directly use build under vender/llama.cpp .

[ghost]

The reason for the larger kv size is because f16_kv is set to false by default causing llama.cpp to use a 32-bit kv cache. The official llama.cpp kv cache size default is 16 bits and therefore is half the size. Currently I'm unsure why this lib uses the 32-bit cache by default.

[abetlen]

The reason for the larger kv size is because f16_kv is set to false by default causing llama.cpp to use a 32-bit kv cache. The official llama.cpp kv cache size default is 16 bits and therefore is half the size. Currently I'm unsure why this lib uses the 32-bit cache by default.

Thank you, I think this default changed since I originally implemented the parameters for the Llama class, I'll fix this.