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fix gpu underutilization

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Lizonghang 2025-02-19 16:30:18 +04:00
parent e219fada4e
commit 07a397360b
1 changed files with 14 additions and 9 deletions
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21
common/common.cpp
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@ -1362,17 +1362,22 @@ static bool assign_layers_to_device(
} }
// check the solution // check the solution
bool is_set_suboptimal = false; bool has_free_gpu_memory = false, has_overload = false;
for (uint32_t m = 0; m < n_world; ++m) { for (uint32_t m = 0; m < n_world; ++m) {
uint32_t w_m = best_solution[m], n_m = best_solution[m + n_world]; uint32_t w_m = best_solution[m], n_m = best_solution[m + n_world];
// if w[m] > n[m] and there is still free VRAM, the GPU is not fully utilized,
// indicating that the memory constraints are too strict, and the set assignment is suboptimal. // if there is still free GPU memory
if (w_m > n_m && n_m < static_cast<uint32_t>(std::round(W * vec_z_gpu[m]))) { if (n_m < static_cast<uint32_t>(std::round(W * vec_z_gpu[m]))) {
is_set_suboptimal = true; has_free_gpu_memory = true;
}
// if there is device overloaded
if (w_m > n_m) {
has_overload = true;
} }
} }
if (is_set_suboptimal) { if (has_free_gpu_memory && has_overload) {
int worst_device = -1; int worst_device = -1;
float worst_speed = std::numeric_limits<float>::max(); float worst_speed = std::numeric_limits<float>::max();
@ -1422,8 +1427,8 @@ static bool assign_layers_to_device(
LOG_INF(" - N Layer Window : %d\n", w[m]); LOG_INF(" - N Layer Window : %d\n", w[m]);
LOG_INF(" - N GPU Layers : %d\n", n[m]); LOG_INF(" - N GPU Layers : %d\n", n[m]);
} }
LOG_INF("\nEstimated Latency: %.3f ms\n", final_objective); // LOG_INF("\nEstimated Latency: %.3f ms\n", final_objective);
LOG_INF("------------------------------------------"); // LOG_INF("------------------------------------------");
// copy value from w and n to n_layer_window and n_gpu_layers, respectively // copy value from w and n to n_layer_window and n_gpu_layers, respectively
std::copy(w.begin(), w.end(), n_layer_window); std::copy(w.begin(), w.end(), n_layer_window);