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backend : clean-up the implementation

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ggml-ci
This commit is contained in:
Georgi Gerganov 2024-01-15 15:52:41 +02:00
parent 01b6f68a00
commit 83f3d7a83c
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GPG Key ID: 449E073F9DC10735
3 changed files with 22 additions and 20 deletions
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11
examples/simple/simple.cpp
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@ -8,19 +8,20 @@
// a function that can be called for every computed node during graph evaluation
// the user can choose to whether to observe the data of the node depending on the tensor parameters
static bool observe_compute(int node_index, struct ggml_tensor * t, bool ask, void * user_data) {
static bool observe_compute(struct ggml_tensor * t, bool ask, void * user_data) {
GGML_UNUSED(user_data);
// the scheduler is asking us if we want to observe this node
if (ask) {
// check if name contains soft_max
// check if name contains soft_max (customize to your needs)
return strstr(t->name, "soft_max") != 0;
}
// print the node data
printf("%s: node_index = %5d, t->name = %32s, t->op = %12s, [%5d, %5d, %5d, %5d]\n",
__func__, node_index, t->name, ggml_op_name(t->op), (int) t->ne[0], (int) t->ne[1], (int) t->ne[2], (int) t->ne[3]);
// print the node info
printf("%s: t->name = %32s, t->op = %12s, [%5d, %5d, %5d, %5d]\n",
__func__, t->name, ggml_op_name(t->op), (int) t->ne[0], (int) t->ne[1], (int) t->ne[2], (int) t->ne[3]);
// this will copy the data to host memory (if needed)
std::vector<float> t_data(ggml_nelements(t));
ggml_backend_tensor_get(t, t_data.data(), 0, ggml_nbytes(t));

27
ggml-backend.c
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@ -1334,28 +1334,31 @@ static void sched_compute_splits(ggml_backend_sched_t sched) {
//ggml_backend_synchronize(split_backend); // necessary to measure compute time
} else {
// similar to ggml_backend_compare_graph_backend
for (int j = 0; j < split->graph.n_nodes; j++) {
struct ggml_tensor * t = split->graph.nodes[j];
for (int j0 = 0; j0 < split->graph.n_nodes; j0++) {
struct ggml_tensor * t = split->graph.nodes[j0];
int k = j;
int j1 = j0;
// check if the user needs data from this node
while (!sched->callback_eval(k, t, true, sched->callback_eval_user_data) && k < split->graph.n_nodes - 1) {
t = split->graph.nodes[++k];
// determine the range [j0, j1] of nodes that can be computed together
while (j1 < split->graph.n_nodes - 1) {
// check if the user needs data from this node
if (sched->callback_eval(t, true, sched->callback_eval_user_data)) {
break;
}
t = split->graph.nodes[++j1];
}
struct ggml_cgraph gv = ggml_graph_view(&split->graph, j, k + 1);
struct ggml_cgraph gv = ggml_graph_view(&split->graph, j0, j1 + 1);
ggml_backend_graph_compute(split_backend, &gv);
// TODO: k is node index in the split, not in the original graph
// TODO: avoid the ask == true call here
if (sched->callback_eval(k, t, true, sched->callback_eval_user_data) &&
!sched->callback_eval(k, t, false, sched->callback_eval_user_data)) {
if (sched->callback_eval(t, true, sched->callback_eval_user_data) && // ask
!sched->callback_eval(t, false, sched->callback_eval_user_data)) { // eval
break;
}
j = k;
j0 = j1;
}
}
uint64_t compute_end_us = ggml_time_us();

4
ggml-backend.h
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@ -154,8 +154,7 @@ extern "C" {
// when ask == false, the scheduler is passing the node tensor to the user for observation
// if the user returns false, the scheduler will cancel the graph compute
//
// TODO: propose to rename to ggml_backend_sched_callback_eval
typedef bool (*ggml_backend_sched_eval_callback)(int node_index, struct ggml_tensor * t, bool ask, void * user_data);
typedef bool (*ggml_backend_sched_eval_callback)(struct ggml_tensor * t, bool ask, void * user_data);
// Initialize a backend scheduler
GGML_API ggml_backend_sched_t ggml_backend_sched_new(ggml_backend_t * backends, ggml_backend_buffer_type_t * bufts, int n_backends, size_t graph_size);
@ -195,7 +194,6 @@ extern "C" {
GGML_API struct ggml_backend_graph_copy ggml_backend_graph_copy(ggml_backend_t backend, struct ggml_cgraph * graph);
GGML_API void ggml_backend_graph_copy_free(struct ggml_backend_graph_copy copy);
// TODO: propose to rename this to ggml_backend_callback_compare
typedef bool (*ggml_backend_eval_callback)(int node_index, struct ggml_tensor * t1, struct ggml_tensor * t2, void * user_data);
// Compare the output of two backends