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Revert "common: share thread pools when n_threads differ (#27138)" (#27337)

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* Revert "common: share thread pools when `n_threads` differ (#27138)"

This reverts commit 04b569142d.

Co-authored-by: Max Krasnyansky <maxk@qti.qualcomm.com>

* common: add comment about inability to share threadpool

---------

Co-authored-by: Max Krasnyansky <maxk@qti.qualcomm.com>
This commit is contained in:
Niklas Wenzel
2026-08-19 17:05:48 +02:00
committed by GitHub
parent 7221e24f57
commit 3e7344670a
1 changed files with 3 additions and 15 deletions
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common/common.cpp
+3 -15
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@@ -1750,18 +1750,6 @@ struct ggml_threadpool_params ggml_threadpool_params_from_cpu_params(const commo
return tpp;
}
namespace {
bool can_share_threadpool(const ggml_threadpool_params & tpp1, const ggml_threadpool_params & tpp2) {
// n_threads does not matter -> we'll use what's larger
ggml_threadpool_params tpp_comparison = tpp1;
tpp_comparison.n_threads = tpp2.n_threads;
return ggml_threadpool_params_match(&tpp_comparison, &tpp2);
}
} // namespace
common_threadpools::~common_threadpools() {
if (!free_fn) {
return;
@@ -1790,9 +1778,9 @@ void common_threadpools::init(llama_context * ctx, const common_params & params)
struct ggml_threadpool_params tpp =
ggml_threadpool_params_from_cpu_params(params.cpuparams);
if (can_share_threadpool(tpp, tpp_batch)) {
tpp.n_threads = std::max(tpp.n_threads, tpp_batch.n_threads);
} else {
// each pool needs to match the respective n_threads exactly
// see: https://github.com/ggml-org/llama.cpp/pull/27138#issuecomment-5332307332
if (!ggml_threadpool_params_match(&tpp, &tpp_batch)) {
threadpool_batch = ggml_threadpool_new_fn(&tpp_batch);
if (!threadpool_batch) {
COM_WRN("batch threadpool create failed : n_threads %d\n", tpp_batch.n_threads);