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| author | Mitja Felicijan <mitja.felicijan@gmail.com> | 2026-02-12 20:57:17 +0100 |
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| committer | Mitja Felicijan <mitja.felicijan@gmail.com> | 2026-02-12 20:57:17 +0100 |
| commit | b333b06772c89d96aacb5490d6a219fba7c09cc6 (patch) | |
| tree | 211df60083a5946baa2ed61d33d8121b7e251b06 /llama.cpp/ggml/include/ggml-opt.h | |
| download | llmnpc-b333b06772c89d96aacb5490d6a219fba7c09cc6.tar.gz | |
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Diffstat (limited to 'llama.cpp/ggml/include/ggml-opt.h')
| -rw-r--r-- | llama.cpp/ggml/include/ggml-opt.h | 256 |
1 files changed, 256 insertions, 0 deletions
diff --git a/llama.cpp/ggml/include/ggml-opt.h b/llama.cpp/ggml/include/ggml-opt.h new file mode 100644 index 0000000..4703a05 --- /dev/null +++ b/llama.cpp/ggml/include/ggml-opt.h @@ -0,0 +1,256 @@ +// This file contains functionality for training models using GGML. +// It is not strictly needed vs. just vanilla GGML but it provides a more high-level interface for common needs such as datasets. +// At the bottom of this file especially there are relatively high-level functions that are suitable use or adaptation in user code. +// +// Module maintainer: Johannes Gäßler (@JohannesGaessler, johannesg@5d6.de) + +#pragma once + +#include "ggml.h" +#include "ggml-backend.h" + +#include <stdint.h> + +#ifdef __cplusplus +extern "C" { +#endif + + struct ggml_opt_dataset; + struct ggml_opt_context; + struct ggml_opt_result; + + typedef struct ggml_opt_dataset * ggml_opt_dataset_t; + typedef struct ggml_opt_context * ggml_opt_context_t; + typedef struct ggml_opt_result * ggml_opt_result_t; + + // ====== Loss ====== + + // built-in loss types, i.e. the built-in quantities minimized by the optimizer + // custom loss types can be defined via mean or sum which simply reduce the outputs for all datapoints to a single value + enum ggml_opt_loss_type { + GGML_OPT_LOSS_TYPE_MEAN, + GGML_OPT_LOSS_TYPE_SUM, + GGML_OPT_LOSS_TYPE_CROSS_ENTROPY, + GGML_OPT_LOSS_TYPE_MEAN_SQUARED_ERROR, + }; + + // ====== Dataset ====== + + GGML_API ggml_opt_dataset_t ggml_opt_dataset_init( + enum ggml_type type_data, // the type for the internal data tensor + enum ggml_type type_label, // the type for the internal labels tensor + int64_t ne_datapoint, // number of elements per datapoint + int64_t ne_label, // number of elements per label + int64_t ndata, // total number of datapoints/labels + int64_t ndata_shard); // number of datapoints/labels per shard (unit at which the dataset is shuffled/copied) + GGML_API void ggml_opt_dataset_free(ggml_opt_dataset_t dataset); + + // get underlying tensors that store the data + GGML_API int64_t ggml_opt_dataset_ndata (ggml_opt_dataset_t dataset); + GGML_API struct ggml_tensor * ggml_opt_dataset_data (ggml_opt_dataset_t dataset); // shape = [ne_datapoint, ndata] + GGML_API struct ggml_tensor * ggml_opt_dataset_labels(ggml_opt_dataset_t dataset); // shape = [nd_label, ndata] + + // shuffle idata first datapoints from dataset with RNG from opt_ctx, shuffle all datapoints if idata is negative + GGML_API void ggml_opt_dataset_shuffle(ggml_opt_context_t opt_ctx, ggml_opt_dataset_t dataset, int64_t idata); + + // get batch at position ibatch from dataset and copy the data to data_batch and labels_batch + GGML_API void ggml_opt_dataset_get_batch( + ggml_opt_dataset_t dataset, + struct ggml_tensor * data_batch, // shape = [ne_datapoint, ndata_batch] + struct ggml_tensor * labels_batch, // shape = [ne_label, ndata_batch] + int64_t ibatch); + GGML_API void ggml_opt_dataset_get_batch_host( + ggml_opt_dataset_t dataset, + void * data_batch, + size_t nb_data_batch, + void * labels_batch, + int64_t ibatch); + + // ====== Model / Context ====== + + enum ggml_opt_build_type { + GGML_OPT_BUILD_TYPE_FORWARD = 10, + GGML_OPT_BUILD_TYPE_GRAD = 20, + GGML_OPT_BUILD_TYPE_OPT = 30, + }; + + enum ggml_opt_optimizer_type { + GGML_OPT_OPTIMIZER_TYPE_ADAMW, + GGML_OPT_OPTIMIZER_TYPE_SGD, + + GGML_OPT_OPTIMIZER_TYPE_COUNT + }; + + // parameters that control which optimizer is used and how said optimizer tries to find the minimal loss + struct ggml_opt_optimizer_params { + struct { + float alpha; // learning rate + float beta1; // first AdamW momentum + float beta2; // second AdamW momentum + float eps; // epsilon for numerical stability + float wd; // weight decay - 0.0f to disable + } adamw; + struct { + float alpha; // learning rate + float wd; // weight decay + } sgd; + }; + + // callback to calculate optimizer parameters prior to a backward pass + // userdata can be used to pass arbitrary data + typedef struct ggml_opt_optimizer_params (*ggml_opt_get_optimizer_params)(void * userdata); + + // returns the default optimizer params (constant, hard-coded values) + // userdata is not used + GGML_API struct ggml_opt_optimizer_params ggml_opt_get_default_optimizer_params(void * userdata); + + // casts userdata to ggml_opt_optimizer_params and returns it + GGML_API struct ggml_opt_optimizer_params ggml_opt_get_constant_optimizer_params(void * userdata); + + // parameters for initializing a new optimization context + struct ggml_opt_params { + ggml_backend_sched_t backend_sched; // defines which backends are used to construct the compute graphs + + // by default the forward graph needs to be reconstructed for each eval + // if ctx_compute, inputs, and outputs are set the graphs are instead allocated statically + struct ggml_context * ctx_compute; + struct ggml_tensor * inputs; + struct ggml_tensor * outputs; + + enum ggml_opt_loss_type loss_type; + enum ggml_opt_build_type build_type; + + int32_t opt_period; // after how many gradient accumulation steps an optimizer step should be done + + ggml_opt_get_optimizer_params get_opt_pars; // callback for calculating optimizer parameters + void * get_opt_pars_ud; // userdata for calculating optimizer parameters + + // only GGML_OPT_OPTIMIZER_TYPE_ADAMW needs m, v momenta per parameter tensor + enum ggml_opt_optimizer_type optimizer; + }; + + // get parameters for an optimization context with defaults set where possible + // parameters for which no sensible defaults exist are supplied as arguments to this function + GGML_API struct ggml_opt_params ggml_opt_default_params( + ggml_backend_sched_t backend_sched, + enum ggml_opt_loss_type loss_type); + + GGML_API ggml_opt_context_t ggml_opt_init(struct ggml_opt_params params); + GGML_API void ggml_opt_free(ggml_opt_context_t opt_ctx); + + // set gradients to zero, initilize loss, and optionally reset the optimizer + GGML_API void ggml_opt_reset(ggml_opt_context_t opt_ctx, bool optimizer); + + GGML_API bool ggml_opt_static_graphs(ggml_opt_context_t opt_ctx); // whether the graphs are allocated_statically + + // get underlying tensors that store data + // if not using static graphs these pointers become invalid with the next call to ggml_opt_alloc + GGML_API struct ggml_tensor * ggml_opt_inputs( ggml_opt_context_t opt_ctx); // forward graph input tensor + GGML_API struct ggml_tensor * ggml_opt_outputs( ggml_opt_context_t opt_ctx); // forward graph output tensor + GGML_API struct ggml_tensor * ggml_opt_labels( ggml_opt_context_t opt_ctx); // labels to compare outputs against + GGML_API struct ggml_tensor * ggml_opt_loss( ggml_opt_context_t opt_ctx); // scalar tensor that contains the loss + GGML_API struct ggml_tensor * ggml_opt_pred( ggml_opt_context_t opt_ctx); // predictions made by outputs + GGML_API struct ggml_tensor * ggml_opt_ncorrect(ggml_opt_context_t opt_ctx); // number of matching predictions between outputs and labels + + // get the gradient accumulator for a node from the forward graph + GGML_API struct ggml_tensor * ggml_opt_grad_acc(ggml_opt_context_t opt_ctx, struct ggml_tensor * node); + + GGML_API enum ggml_opt_optimizer_type ggml_opt_context_optimizer_type(ggml_opt_context_t); //TODO consistent naming scheme + + GGML_API const char * ggml_opt_optimizer_name(enum ggml_opt_optimizer_type); + + // ====== Optimization Result ====== + + GGML_API ggml_opt_result_t ggml_opt_result_init(void); + GGML_API void ggml_opt_result_free(ggml_opt_result_t result); + GGML_API void ggml_opt_result_reset(ggml_opt_result_t result); + + // get data from result, uncertainties are optional and can be ignored by passing NULL + GGML_API void ggml_opt_result_ndata( ggml_opt_result_t result, int64_t * ndata); // writes 1 value, number of datapoints + GGML_API void ggml_opt_result_loss( ggml_opt_result_t result, double * loss, double * unc); // writes 1 value + GGML_API void ggml_opt_result_pred( ggml_opt_result_t result, int32_t * pred); // writes ndata values + GGML_API void ggml_opt_result_accuracy(ggml_opt_result_t result, double * accuracy, double * unc); // writes 1 value + + // ====== Computation ====== + + // if not using static graphs, this function must be called prior to ggml_opt_alloc + GGML_API void ggml_opt_prepare_alloc( + ggml_opt_context_t opt_ctx, + struct ggml_context * ctx_compute, + struct ggml_cgraph * gf, + struct ggml_tensor * inputs, + struct ggml_tensor * outputs); + + // allocate the next graph for evaluation, either forward or forward + backward + // must be called exactly once prior to calling ggml_opt_eval + GGML_API void ggml_opt_alloc(ggml_opt_context_t opt_ctx, bool backward); + + // do forward pass, increment result if not NULL, do backward pass if allocated + GGML_API void ggml_opt_eval(ggml_opt_context_t opt_ctx, ggml_opt_result_t result); + + // ############################################################################ + // ## The high-level functions start here. They do not depend on any private ## + // ## functions or structs and can be copied to and adapted for user code. ## + // ############################################################################ + + // ====== Intended Usage ====== + // + // 1. Select the appropriate loss for your problem. + // 2. Create a dataset and set the data for the "data" tensor. Also set the "labels" tensor if your loss needs them. + // Setting the shard size to 1 will be fine, it's the granularity with which data is shuffled/loaded (bigger values are faster). + // 3. Create a GGML graph for your model with no_alloc == true. Use two separate contexts for the tensors. + // The first context should contain the model parameters and inputs and be allocated statically in user code. + // The second context should contain all other tensors and will be (re)allocated automatically. + // Due to this automated allocation the data of the second context is not defined when accessed in user code. + // Note that the second dimension of the inputs/outputs are interpreted as the number of datapoints in those tensors. + // 4. Call ggml_opt_fit. If you need more control you can use ggml_opt_epoch instead. + + // signature for a callback while evaluating opt_ctx on dataset, called after an evaluation + typedef void (*ggml_opt_epoch_callback)( + bool train, // true after training evaluation, false after validation evaluation + ggml_opt_context_t opt_ctx, + ggml_opt_dataset_t dataset, + ggml_opt_result_t result, // result associated with the dataset subsection + int64_t ibatch, // number of batches that have been evaluated so far + int64_t ibatch_max, // total number of batches in this dataset subsection + int64_t t_start_us); // time at which the evaluation on the dataset subsection was started + + // do training on front of dataset, do evaluation only on back of dataset + GGML_API void ggml_opt_epoch( + ggml_opt_context_t opt_ctx, + ggml_opt_dataset_t dataset, + ggml_opt_result_t result_train, // result to increment during training, ignored if NULL + ggml_opt_result_t result_eval, // result to increment during evaluation, ignored if NULL + int64_t idata_split, // data index at which to split training and evaluation + ggml_opt_epoch_callback callback_train, + ggml_opt_epoch_callback callback_eval); + + // callback that prints a progress bar on stderr + GGML_API void ggml_opt_epoch_callback_progress_bar( + bool train, + ggml_opt_context_t opt_ctx, + ggml_opt_dataset_t dataset, + ggml_opt_result_t result, + int64_t ibatch, + int64_t ibatch_max, + int64_t t_start_us); + + // fit model defined by inputs and outputs to dataset + GGML_API void ggml_opt_fit( + ggml_backend_sched_t backend_sched, // backend scheduler for constructing the compute graphs + struct ggml_context * ctx_compute, // context with temporarily allocated tensors to calculate the outputs + struct ggml_tensor * inputs, // input tensor with shape [ne_datapoint, ndata_batch] + struct ggml_tensor * outputs, // output tensor, must have shape [ne_label, ndata_batch] if labels are used + ggml_opt_dataset_t dataset, // dataset with data and optionally also labels + enum ggml_opt_loss_type loss_type, // loss to minimize + enum ggml_opt_optimizer_type optimizer, // sgd or adamw + ggml_opt_get_optimizer_params get_opt_pars, // callback to get optimizer params, userdata is pointer to epoch (of type int64_t) + int64_t nepoch, // how many times the dataset should be iterated over + int64_t nbatch_logical, // datapoints optimizer step, must be a multiple of ndata_batch in inputs/outputs + float val_split, // fraction of the dataset to use for validation, must be in [0.0f, 1.0f) + bool silent); // whether or not info prints to stderr should be suppressed + + +#ifdef __cplusplus +} +#endif |
