gtests: graph: api: test concurrent execution

tests/gtests/graph/api/CMakeLists.txt

@@ -70,6 +70,7 @@ FILE(GLOB API_TEST_ENGINE_DEPENDENT_SOURCES
     ${CMAKE_CURRENT_SOURCE_DIR}/test_c_api_compile.cpp
     ${CMAKE_CURRENT_SOURCE_DIR}/test_cpp_api_compile.cpp
     ${CMAKE_CURRENT_SOURCE_DIR}/test_cpp_api_partition.cpp
+    ${CMAKE_CURRENT_SOURCE_DIR}/test_cpp_api_concurrent_execution.cpp
 )
 
 foreach(TEST_FILE ${API_TEST_ENGINE_INDEPENDENT_SOURCES})

tests/gtests/graph/api/test_cpp_api_concurrent_execution.cpp

@@ -0,0 +1,219 @@
+/*******************************************************************************
+* Copyright 2026 Intel Corporation
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*******************************************************************************/
+
+#include <atomic>
+#include <iostream>
+#include <memory>
+#include <thread>
+#include <vector>
+
+#include "oneapi/dnnl/dnnl_graph.hpp"
+#include "test_api_common.hpp"
+#include "gtest/gtest.h"
+
+using namespace dnnl::graph;
+
+struct sdpa_dims_t {
+    logical_tensor::dim mb;
+    logical_tensor::dim seq_len;
+    logical_tensor::dim head_num;
+    logical_tensor::dim head_size;
+    logical_tensor::dim query_num;
+};
+
+const int num_threads = 4;
+// execution times for each thread to run the compiled partition.
+const int num_executions = 500;
+
+// Helper function to create SDPA graph
+std::pair<dnnl::graph::graph, std::vector<logical_tensor>> create_sdpa_graph(
+        dnnl::engine::kind engine_kind, logical_tensor::data_type dt,
+        const sdpa_dims_t &p) {
+
+    // Prepare input and output shapes
+    const dims_t qv_sz = {p.mb, p.head_num, p.query_num, p.head_size};
+    const dims_t k_sz = {p.mb, p.head_num, p.seq_len, p.head_size};
+    const dims_t score_sz = {p.mb, p.head_num, p.query_num, p.seq_len};
+    const dims_t scale_sz = {1};
+    const dims_t mask_sz = {p.mb, 1, p.query_num, p.seq_len};
+
+    // Incremental IDs for logical tensors and operations
+    size_t id = 0;
+
+    // Intermediate data type
+    const logical_tensor::data_type dt_inter = logical_tensor::data_type::f32;
+
+    // Create logical tensors
+    auto query = logical_tensor(
+            id++, dt, qv_sz, logical_tensor::layout_type::strided);
+    auto key = logical_tensor(
+            id++, dt, k_sz, logical_tensor::layout_type::strided);
+    auto score = logical_tensor(
+            id++, dt_inter, score_sz, logical_tensor::layout_type::strided);
+    auto bmm1 = op(id++, op::kind::MatMul, "bmm1");
+    bmm1.set_attr<bool>(op::attr::transpose_b, true);
+    bmm1.add_inputs({query, key});
+    bmm1.add_outputs({score});
+
+    // Scale operation
+    auto scale = logical_tensor(
+            id++, dt, scale_sz, logical_tensor::layout_type::strided);
+    auto scaled_score = logical_tensor(
+            id++, dt_inter, score_sz, logical_tensor::layout_type::strided);
+    auto scale_div = op(id++, op::kind::Divide, "scale_div");
+    scale_div.add_inputs({score, scale});
+    scale_div.add_outputs({scaled_score});
+
+    // Mask operation
+    auto mask = logical_tensor(
+            id++, dt, mask_sz, logical_tensor::layout_type::strided);
+    auto masked_score = logical_tensor(
+            id++, dt_inter, score_sz, logical_tensor::layout_type::strided);
+    auto mask_add = op(id++, op::kind::Add, "mask_add");
+    mask_add.add_inputs({scaled_score, mask});
+    mask_add.add_outputs({masked_score});
+
+    // Softmax
+    auto probs = logical_tensor(
+            id++, dt, score_sz, logical_tensor::layout_type::strided);
+    auto softmax = op(id++, op::kind::SoftMax, "softmax");
+    softmax.set_attr<int64_t>(op::attr::axis, -1);
+    softmax.add_inputs({masked_score});
+    softmax.add_outputs({probs});
+
+    // Final matmul
+    auto value = logical_tensor(
+            id++, dt, k_sz, logical_tensor::layout_type::strided);
+    auto output = logical_tensor(
+            id++, dt, qv_sz, logical_tensor::layout_type::strided);
+    auto bmm2 = op(id++, op::kind::MatMul, "bmm2");
+    bmm2.add_inputs({probs, value});
+    bmm2.add_outputs({output});
+
+    // Construct graph
+    dnnl::graph::graph sdpa_graph(engine_kind);
+    sdpa_graph.add_op(bmm1);
+    sdpa_graph.add_op(scale_div);
+    sdpa_graph.add_op(mask_add);
+    sdpa_graph.add_op(softmax);
+    sdpa_graph.add_op(bmm2);
+    sdpa_graph.finalize();
+
+    // Return graph and input/output tensors
+    std::vector<logical_tensor> tensors;
+    tensors.push_back(query);
+    tensors.push_back(key);
+    tensors.push_back(scale);
+    tensors.push_back(mask);
+    tensors.push_back(value);
+    tensors.push_back(output);
+    return std::make_pair(std::move(sdpa_graph), std::move(tensors));
+}
+
+// Thread worker function for concurrent execution
+void execute_partition_worker(int thread_id, const compiled_partition &cp,
+        std::vector<logical_tensor> input_tensors, logical_tensor output_tensor,
+        const dnnl::engine &eng, std::atomic<int> &success_count,
+        std::atomic<int> &error_count) {
+    std::cout << "Thread " << thread_id << " starting execution" << std::endl;
+    try {
+        // Create stream for this thread
+        dnnl::stream strm(eng);
+
+        // each thread creates its own tensors to avoid data races.
+        auto ts_query = tensor(input_tensors[0], eng);
+        auto ts_key = tensor(input_tensors[1], eng);
+        auto ts_scale = tensor(input_tensors[2], eng);
+        auto ts_mask = tensor(input_tensors[3], eng);
+        auto ts_value = tensor(input_tensors[4], eng);
+        auto ts_output = tensor(output_tensor, eng);
+
+        std::vector<tensor> input_tensors
+                = {ts_query, ts_key, ts_scale, ts_mask, ts_value};
+        std::vector<tensor> output_tensors = {ts_output};
+        for (int i = 0; i < num_executions; ++i) {
+            cp.execute(strm, input_tensors, output_tensors);
+            strm.wait();
+        }
+
+        success_count.fetch_add(num_executions);
+    } catch (const std::exception &e) {
+        std::cerr << "Thread " << thread_id << " error: " << e.what()
+                  << std::endl;
+        error_count.fetch_add(num_executions); // Mark all executions as failed
+    }
+
+    std::cout << "Thread " << thread_id << " finished execution" << std::endl;
+}
+
+TEST(APIConcurrentExecution, SDPAConcurrentTest) {
+    using namespace dnnl::graph;
+
+    dnnl::engine::kind engine_kind
+            = static_cast<dnnl::engine::kind>(api_test_engine_kind);
+    dnnl::engine eng = cpp_api_test_dnnl_engine_create(engine_kind);
+
+    // Define SDPA dimensions for test
+    sdpa_dims_t dims = {2, 128, 8, 64, 128};
+
+    logical_tensor::data_type dt = logical_tensor::data_type::f32;
+
+    // Create SDPA graph
+    std::pair<dnnl::graph::graph, std::vector<logical_tensor>> graph_tensor_pair
+            = create_sdpa_graph(engine_kind, dt, dims);
+    dnnl::graph::graph sdpa_graph = graph_tensor_pair.first;
+    std::vector<logical_tensor> tensors = graph_tensor_pair.second;
+
+    // Get partitions
+    std::vector<partition> partitions = sdpa_graph.get_partitions();
+    ASSERT_EQ(partitions.size(), 1U) << "Should be only one partition";
+
+    // Compile the partition
+    const auto &part = partitions[0];
+    std::vector<logical_tensor> inputs(tensors.begin(), tensors.end() - 1);
+    std::vector<logical_tensor> outputs = {tensors.back()};
+    compiled_partition cp = part.compile(inputs, outputs, eng);
+
+    // Create atomic counters to track execution results
+    std::atomic<int> success_count {0};
+    std::atomic<int> error_count {0};
+
+    // Launch the concurrent threads
+    std::vector<std::thread> threads;
+    for (int i = 0; i < num_threads; ++i) {
+        std::vector<logical_tensor> thread_inputs(
+                tensors.begin(), tensors.end() - 1);
+        logical_tensor thread_output = tensors.back();
+
+        threads.emplace_back(execute_partition_worker, i, cp, thread_inputs,
+                thread_output, eng, std::ref(success_count),
+                std::ref(error_count));
+    }
+
+    // Wait for all threads to complete
+    for (auto &thread : threads) {
+        thread.join();
+    }
+
+    // Verify results
+    const int expected_total = num_threads * num_executions;
+
+    EXPECT_EQ(error_count.load(), 0)
+            << "Encountered " << error_count.load() << " execution errors";
+    EXPECT_EQ(success_count.load(), expected_total)
+            << "Expected " << expected_total << " successful executions, got "
+            << success_count.load();
+}