vbatts/llama.cpp
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imatrix : offload to GPU support

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This commit is contained in:
Georgi Gerganov 2024-01-15 16:18:11 +02:00
parent e0493800ce
commit 0b2fca9a9f
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GPG key ID: 449E073F9DC10735
3 changed files with 48 additions and 33 deletions
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61
examples/imatrix/imatrix.cpp
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@ -33,19 +33,43 @@ class IMatrixCollector {
public:
IMatrixCollector() = default;
void set_parameters(StatParams&& params) { m_params = std::move(params); }
void collect_imatrix(const struct ggml_tensor * src0, const struct ggml_tensor * src1);
bool collect_imatrix(struct ggml_tensor * t, bool ask, void * user_data);
void save_imatrix() const;
private:
std::unordered_map<std::string, Stats> m_stats;
StatParams m_params;
std::mutex m_mutex;
int m_last_call = 0;
std::vector<float> m_src1_data;
};
void IMatrixCollector::collect_imatrix(const struct ggml_tensor * src0, const struct ggml_tensor * src1) {
if (src1->ne[1] < 16 || src1->type != GGML_TYPE_F32) return;
if (!(strncmp(src0->name, "blk.", 4) == 0 || (m_params.collect_output_weight && strcmp(src0->name, "output.weight") == 0))) return;
bool IMatrixCollector::collect_imatrix(struct ggml_tensor * t, bool ask, void * user_data) {
GGML_UNUSED(user_data);
const struct ggml_tensor * src0 = t->src[0];
const struct ggml_tensor * src1 = t->src[1];
// when ask is true, the scheduler wants to know if we are interested in data from this tensor
// if we return true, a follow-up call will be made with ask=false in which we can do the actual collection
if (ask) {
if (t->op != GGML_OP_MUL_MAT) return false;
if (src1->ne[1] < 16 || src1->type != GGML_TYPE_F32) return false;
if (!(strncmp(src0->name, "blk.", 4) == 0 || (m_params.collect_output_weight && strcmp(src0->name, "output.weight") == 0))) return false;
return true;
}
std::lock_guard<std::mutex> lock(m_mutex);
// copy the data from the GPU memory if needed
const bool is_host = ggml_backend_buffer_is_host(src1->buffer);
if (!is_host || !ggml_is_contiguous(src1)) {
m_src1_data.resize(ggml_nelements(src1));
ggml_backend_tensor_get(src1, m_src1_data.data(), 0, ggml_nbytes(src1));
}
const float * data = is_host ? (const float *) src1->data : m_src1_data.data();
auto& e = m_stats[src0->name];
if (e.values.empty()) {
e.values.resize(src1->ne[0], 0);
@ -59,7 +83,7 @@ void IMatrixCollector::collect_imatrix(const struct ggml_tensor * src0, const st
printf("%s[%d]: %s, %d x %d, %d\n",__func__,m_last_call,src0->name,(int)src1->ne[0],(int)src1->ne[1],(int)src1->type);
}
for (int row = 0; row < (int)src1->ne[1]; ++row) {
const float * x = (const float *)src1->data + row * src1->ne[0];
const float * x = data + row * src1->ne[0];
for (int j = 0; j < (int)src1->ne[0]; ++j) {
e.values[j] += x[j]*x[j];
}
@ -70,6 +94,8 @@ void IMatrixCollector::collect_imatrix(const struct ggml_tensor * src0, const st
save_imatrix();
}
}
return true;
}
void IMatrixCollector::save_imatrix() const {
@ -93,8 +119,8 @@ void IMatrixCollector::save_imatrix() const {
static IMatrixCollector g_collector;
static void ik_collect_imatrix(const struct ggml_tensor * src0, const struct ggml_tensor * src1) {
g_collector.collect_imatrix(src0, src1);
static bool ik_collect_imatrix(struct ggml_tensor * t, bool ask, void * user_data) {
return g_collector.collect_imatrix(t, ask, user_data);
}
@ -320,8 +346,6 @@ int main(int argc, char ** argv) {
g_collector.set_parameters(std::move(sparams));
ggml_set_imatrix_collection(ik_collect_imatrix);
params.logits_all = true;
params.n_batch = std::min(params.n_batch, params.n_ctx);
@ -340,16 +364,27 @@ int main(int argc, char ** argv) {
llama_backend_init(params.numa);
llama_model * model;
llama_context * ctx;
llama_model_params mparams = llama_model_params_from_gpt_params(params);
// load the model and apply lora adapter, if any
std::tie(model, ctx) = llama_init_from_gpt_params(params);
llama_model * model = llama_load_model_from_file(params.model.c_str(), mparams);
if (model == NULL) {
fprintf(stderr, "%s: error: unable to load model\n", __func__);
return 1;
}
llama_context_params cparams = llama_context_params_from_gpt_params(params);
// pass the callback to the backend scheduler
// it will be executed for each node during the graph computation
cparams.cb_eval = ik_collect_imatrix;
cparams.cb_eval_user_data = NULL;
llama_context * ctx = llama_new_context_with_model(model, cparams);
if (ctx == NULL) {
fprintf(stderr, "%s: error: unable to create context\n", __func__);
return 1;
}
const int n_ctx_train = llama_n_ctx_train(model);
if (params.n_ctx > n_ctx_train) {
fprintf(stderr, "%s: warning: model was trained on only %d context tokens (%d specified)\n",