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Compute tensor size in bytes.

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This commit is contained in:
antirez
2023-12-24 23:44:24 +01:00
parent d54409bc9c
commit b3092d3860
3 changed files with 98 additions and 58 deletions
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5
gguf-show.c
View File

@@ -30,12 +30,13 @@ int main(int argc, char **argv) {
gguf_tensor tensor;
while (gguf_get_tensor(ctx,&tensor)) {
printf("%s tensor %.*s @%llu, %llu weights\n",
printf("%s tensor %.*s @%llu, %llu weights, %llu bytes\n",
gguf_get_tensor_type_name(tensor.type),
(int)tensor.namelen,
tensor.name,
tensor.offset,
tensor.num_weights);
tensor.num_weights,
tensor.bsize);
}
return 0;
}

147
gguflib.c
View File

@@ -11,6 +11,86 @@
#include "gguflib.h"
/* ============================ Low level functions ========================= */
/* GGUF value ID to name lookup table. */
const char *gguf_value_name[] = {
"uint8", "int8", "uint16", "int16", "uint32", "int32",
"float32", "bool", "string", "array", "uint64", "int64",
"float64"
};
/* GGUF tensor type to features lookup table. */
struct gguf_tensor_type_features {
char *name;
uint32_t items_per_block;
uint32_t bytes_per_block;
} gguf_tensor_type_features[] = {
{"f32", 1, 4},
{"f16", 1, 2},
{"q4_0", 32, 18},
{"q4_1", 32, 20},
{"q4_2 deprecated", 0, 0},
{"q4_3 deprecated", 0, 0},
{"q5_0", 32, 22},
{"q5_1", 32, 24},
{"q8_0", 32, 34},
{"q8_1", 32, 40},
{"q2_k", 256, 82},
{"q3_k", 256, 110},
{"q4_k", 256, 144},
{"q5_k", 256, 176},
{"q6_k", 256, 210},
{"q8_k", 256, 292},
};
/* Return the value type name given the type ID. */
const char *gguf_get_value_type_name(uint32_t type) {
if (type >= sizeof(gguf_value_name)/sizeof(char*)) return "unknown";
return gguf_value_name[type];
}
/* Return the tensor type name given the type ID. */
const char *gguf_get_tensor_type_name(uint32_t type) {
if (type >= sizeof(gguf_tensor_type_features)/sizeof(gguf_tensor_type_features[0])) return "unknown";
return gguf_tensor_type_features[type].name;
}
/* Return the tensor type features, or NULL if the type ID is out of range. */
struct gguf_tensor_type_features *gguf_get_tensor_type_features(uint32_t type) {
if (type >= sizeof(gguf_tensor_type_features)/sizeof(gguf_tensor_type_features[0])) return NULL;
return &gguf_tensor_type_features[type];
}
/* Return the length of the value pointed by 'val' of type 'type'.
* For the array type the length can't be inferred without consuming
* it, so 0 is returned. */
uint64_t gguf_value_len(uint32_t type, union gguf_value *val) {
uint64_t valuelen = 0;
switch(type) {
case GGUF_VALUE_TYPE_BOOL:
case GGUF_VALUE_TYPE_UINT8:
case GGUF_VALUE_TYPE_INT8:
valuelen = 1; break;
case GGUF_VALUE_TYPE_UINT16:
case GGUF_VALUE_TYPE_INT16:
valuelen = 2; break;
case GGUF_VALUE_TYPE_UINT32:
case GGUF_VALUE_TYPE_INT32:
case GGUF_VALUE_TYPE_FLOAT32:
valuelen = 4; break;
case GGUF_VALUE_TYPE_UINT64:
case GGUF_VALUE_TYPE_INT64:
case GGUF_VALUE_TYPE_FLOAT64:
valuelen = 8; break;
case GGUF_VALUE_TYPE_STRING:
valuelen = 8+val->string.len; break;
}
return valuelen;
}
/* =============================== GGUF file API ============================ */
/* Open a GGUF file and return a parsing context. */
gguf_ctx *gguf_init(char *filename) {
struct stat sb;
@@ -85,6 +165,12 @@ int gguf_get_key(gguf_ctx *ctx, gguf_key *key) {
return 1;
}
/* Given an offset or a length, returns the padding needed to align it
* to ctx->alignment. */
uint64_t gguf_get_alignment_padding(uint64_t alignment, uint64_t offset) {
return (alignment - (offset % alignment)) % alignment;
}
/* Set the data section offset. This function must be called exactly when
* all the key-values are consumed, in the context of the first call of
* gguf_get_tensor(): this way we will be able to return tensor offsets
@@ -102,8 +188,7 @@ void gguf_set_data_offset(gguf_ctx *ctx) {
offset += 4; // Skip tensor type.
offset += 8; // Skip tensor offset.
}
uint64_t padding =
(ctx->alignment - (offset % ctx->alignment)) % ctx->alignment;
uint64_t padding = gguf_get_alignment_padding(ctx->alignment,offset);
ctx->data_off = offset + padding;
}
@@ -154,61 +239,15 @@ int gguf_get_tensor(gguf_ctx *ctx, gguf_tensor *tensor) {
ctx->off += 8; // Skip tensor offset.
tensor->offset = ctx->data_off + *offset;
tensor->weights = ctx->data + tensor->offset;
tensor->weights_data = ctx->data + tensor->offset;
struct gguf_tensor_type_features *tf;
tf = gguf_get_tensor_type_features(tensor->type);
uint64_t weights_padding = gguf_get_alignment_padding(tf->items_per_block,tensor->num_weights);
tensor->bsize = ((tensor->num_weights+weights_padding) / tf->items_per_block) * tf->bytes_per_block;
return 1;
}
const char *gguf_value_name[] = {
"uint8", "int8", "uint16", "int16", "uint32", "int32",
"float32", "bool", "string", "array", "uint64", "int64",
"float64"
};
const char *gguf_tensor_type_name[] = {
"f32", "f16", "q4_0", "q4_1", "q4_2 deprecated", "q4_3 deprecated",
"q5_0", "q5_1", "q8_0", "q8_1", "q2_k", "q3_k", "q4_k", "q5_k",
"q6_k", "q7_k", "q8_k", "i8", "i16", "i32", "count"
};
/* Return the value type name given the type ID. */
const char *gguf_get_value_type_name(uint32_t type) {
if (type >= sizeof(gguf_value_name)/sizeof(char*)) return "unknown";
return gguf_value_name[type];
}
/* Return the tensor type name given the type ID. */
const char *gguf_get_tensor_type_name(uint32_t type) {
if (type >= sizeof(gguf_tensor_type_name)/sizeof(char*)) return "unknown";
return gguf_tensor_type_name[type];
}
/* Return the length of the value pointed by 'val' of type 'type'.
* For the array type the length can't be inferred without consuming
* it, so 0 is returned. */
uint64_t gguf_value_len(uint32_t type, union gguf_value *val) {
uint64_t valuelen = 0;
switch(type) {
case GGUF_VALUE_TYPE_BOOL:
case GGUF_VALUE_TYPE_UINT8:
case GGUF_VALUE_TYPE_INT8:
valuelen = 1; break;
case GGUF_VALUE_TYPE_UINT16:
case GGUF_VALUE_TYPE_INT16:
valuelen = 2; break;
case GGUF_VALUE_TYPE_UINT32:
case GGUF_VALUE_TYPE_INT32:
case GGUF_VALUE_TYPE_FLOAT32:
valuelen = 4; break;
case GGUF_VALUE_TYPE_UINT64:
case GGUF_VALUE_TYPE_INT64:
case GGUF_VALUE_TYPE_FLOAT64:
valuelen = 8; break;
case GGUF_VALUE_TYPE_STRING:
valuelen = 8+val->string.len; break;
}
return valuelen;
}
/* This function can be called after gguf_get_key(), since the context
* offset will be in the position of a value.
*

4
gguflib.h
View File

@@ -136,9 +136,9 @@ typedef struct {
uint32_t ndim; // Number of dimensions of the tensor.
uint64_t dim[GGUF_TENSOR_MAX_DIM]; // Dimensions (Eg. [512, 1024, 1, 1]).
uint64_t offset; // Offset from start of file.
uint64_t size; // Total size in bytes.
uint64_t bsize; // Total size in bytes.
uint64_t num_weights; // Total number of parameters.
uint8_t *weights; // Pointer to the mmaped file.
uint8_t *weights_data; // Pointer to the mmaped file.
} gguf_tensor;
/* The context you get after opening a GGUF file with gguf_init(). */