vbatts/llama.cpp
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ggml : use F16 instead of F32 in Q4_0, Q4_1, Q8_0 (#1508)

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* ggml : use F16 instead of F32 in Q4_0, Q4_1 and Q8_0

* llama : bump LLAMA_FILE_VERSION to 3

* cuda : update Q4 and Q8 dequantize kernels

* ggml : fix AVX dot products

* readme : update performance table + hot topics
This commit is contained in:
Georgi Gerganov 2023-05-19 22:17:18 +03:00 • committed by GitHub
parent 6986c7835a
commit 2d5db48371
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6 changed files with 109 additions and 102 deletions
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llama.cpp
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@ -406,6 +406,7 @@ enum llama_file_version {
LLAMA_FILE_VERSION_GGMF_V1, // added version field and scores in vocab
LLAMA_FILE_VERSION_GGJT_V1, // added padding
LLAMA_FILE_VERSION_GGJT_V2, // changed quantization format
LLAMA_FILE_VERSION_GGJT_V3, // changed Q4 and Q8 quantization format
};
struct llama_file_loader {
@ -438,6 +439,8 @@ struct llama_file_loader {
file_version = LLAMA_FILE_VERSION_GGJT_V1;
} else if (magic == 'ggjt' && version == 2) {
file_version = LLAMA_FILE_VERSION_GGJT_V2;
} else if (magic == 'ggjt' && version == 3) {
file_version = LLAMA_FILE_VERSION_GGJT_V3;
} else {
throw format("unknown (magic, version) combination: %08x, %08x; is this really a GGML file?",
magic, version);
@ -844,7 +847,8 @@ static const char *llama_file_version_name(llama_file_version version) {
case LLAMA_FILE_VERSION_GGML: return "'ggml' (old version with low tokenizer quality and no mmap support)";
case LLAMA_FILE_VERSION_GGMF_V1: return "ggmf v1 (old version with no mmap support)";
case LLAMA_FILE_VERSION_GGJT_V1: return "ggjt v1 (pre #1405)";
case LLAMA_FILE_VERSION_GGJT_V2: return "ggjt v2 (latest)";
case LLAMA_FILE_VERSION_GGJT_V2: return "ggjt v2 (pre #1508)";
case LLAMA_FILE_VERSION_GGJT_V3: return "ggjt v3 (latest)";
}
return "unknown";
@ -924,11 +928,19 @@ static void llama_model_load_internal(
fprintf(stderr, "%s: model size = %s\n", __func__, llama_model_type_name(model.type));
}
if (file_version != LLAMA_FILE_VERSION_GGJT_V2) {
if (file_version < LLAMA_FILE_VERSION_GGJT_V2) {
if (hparams.ftype != LLAMA_FTYPE_ALL_F32 &&
hparams.ftype != LLAMA_FTYPE_MOSTLY_F16 &&
hparams.ftype != LLAMA_FTYPE_MOSTLY_Q8_0) {
throw format("this format is no longer supported (see https://github.com/ggerganov/llama.cpp/pull/1305)");
throw format("this format is no longer supported (see https://github.com/ggerganov/llama.cpp/pull/1405)");
}
}
if (file_version < LLAMA_FILE_VERSION_GGJT_V3) {
if (hparams.ftype == LLAMA_FTYPE_MOSTLY_Q4_0 ||
hparams.ftype == LLAMA_FTYPE_MOSTLY_Q4_1 ||
hparams.ftype == LLAMA_FTYPE_MOSTLY_Q8_0) {
throw format("this format is no longer supported (see https://github.com/ggerganov/llama.cpp/pull/1508)");
}
}