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skip cuda operations when running qwen 3.5 moe on other backend #19095

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Merged
Gasoonjia merged 1 commit into from
Apr 24, 2026
Merged

skip cuda operations when running qwen 3.5 moe on other backend #19095

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17 changes: 12 additions & 5 deletions examples/models/qwen3_5_moe/main.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -16,6 +16,7 @@
#include <executorch/runtime/platform/log.h>
#include <pytorch/tokenizers/hf_tokenizer.h>

#include <cinttypes>
#include <fstream>
#include <string>
#include <vector>
Expand Down Expand Up @@ -58,11 +59,13 @@ int main(int argc, char** argv) {

llm::Stats stats;

#ifdef EXECUTORCH_BUILD_CUDA
// GPU memory before load
size_t gpu_free_bytes, gpu_total_bytes;
size_t gpu_free_bytes = 0, gpu_total_bytes = 0;
cudaMemGetInfo(&gpu_free_bytes, &gpu_total_bytes);
stats.gpu_total_bytes = gpu_total_bytes;
stats.gpu_free_before_load_bytes = gpu_free_bytes;
#endif

stats.model_load_start_ms = llm::time_in_ms();

Expand Down Expand Up @@ -127,9 +130,11 @@ int main(int argc, char** argv) {

stats.model_load_end_ms = llm::time_in_ms();

#ifdef EXECUTORCH_BUILD_CUDA
// GPU memory after load
cudaMemGetInfo(&gpu_free_bytes, &gpu_total_bytes);
stats.gpu_free_after_load_bytes = gpu_free_bytes;
#endif

// Get EOS ids
auto eos_ids = llm::get_eos_ids(tokenizer.get(), module.get());
Expand All @@ -155,7 +160,7 @@ int main(int argc, char** argv) {
}
auto prompt_tokens = std::move(*encode_result);
int64_t num_prompt_tokens = prompt_tokens.size();
printf("Prompt tokens: %ld\n", num_prompt_tokens);
printf("Prompt tokens: %" PRId64 "\n", num_prompt_tokens);

stats.num_prompt_tokens = num_prompt_tokens;
stats.inference_start_ms = llm::time_in_ms();
Expand Down Expand Up @@ -209,7 +214,7 @@ int main(int argc, char** argv) {
double prefill_ms =
(double)(stats.prompt_eval_end_ms - stats.inference_start_ms);
printf(
"Prefill: %ld tokens in %.1f ms (%.1f tok/s)\n",
"Prefill: %" PRId64 " tokens in %.1f ms (%.1f tok/s)\n",
num_prompt_tokens,
prefill_ms,
num_prompt_tokens * 1000.0 / prefill_ms);
Expand Down Expand Up @@ -290,17 +295,19 @@ int main(int argc, char** argv) {
double decode_ms =
(double)(stats.inference_end_ms - stats.prompt_eval_end_ms);
printf(
"Decode: %ld tokens in %.1f ms (%.1f tok/s)\n",
"Decode: %" PRId64 " tokens in %.1f ms (%.1f tok/s)\n",
num_generated,
decode_ms,
num_generated * 1000.0 / decode_ms);
printf("Prompt tokens: %ld\n", num_prompt_tokens);
printf("Prompt tokens: %" PRId64 "\n", num_prompt_tokens);

#ifdef EXECUTORCH_BUILD_CUDA
// GPU memory after generation
cudaMemGetInfo(&gpu_free_bytes, &gpu_total_bytes);
stats.gpu_free_after_generate_bytes = gpu_free_bytes;
stats.gpu_peak_usage_mb =
(stats.gpu_total_bytes - gpu_free_bytes) / 1024.0 / 1024.0;
#endif

llm::print_report(stats);

Expand Down
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