[rocjitsu][CI] Bound each corpus simulator's CPU thread budget

emulation/rocjitsu/tests/CMakeLists.txt

@@ -836,7 +836,7 @@ endif()
 rj_add_gtest_tests(
     rocjitsu_tests
     TEST_FILTER
-        "-*Benchmark*:*RequestExitWakesAllPartitions*:*DispatchedWaitSurvivesAConcurrentFinalClose*"
+        "-*Benchmark*:*RequestExitWakesAllPartitions*:*DispatchedWaitSurvivesAConcurrentFinalClose*:*EffectiveConfigTest.ReadsNativeLaunchConfigHandoff"
 )
 
 # RequestExitWakesAllPartitions may require several runs to show regression
@@ -1334,6 +1334,30 @@ get_filename_component(
 )
 set(RJ_CLI "$<TARGET_FILE:rocjitsu_bin>")
 
+rj_add_test(
+    NAME "EffectiveConfigTest.ReadsNativeLaunchConfigHandoff"
+    COMMAND
+        ${RJ_CLI}
+        --config
+        ${CMAKE_SOURCE_DIR}/configs/gfx942_cdna3.json
+        --cpu-thread-budget
+        4
+        --
+        $<TARGET_FILE:rocjitsu_tests>
+        --gtest_filter=EffectiveConfigTest.ReadsNativeLaunchConfigHandoff
+    WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
+    TIMEOUT 60
+    INSTALL_COMMAND
+        "\${RJ_INSTALLED_BINDIR}/rocjitsu"
+        "--config"
+        "\${RJ_INSTALLED_CONFIG_DIR}/gfx942_cdna3.json"
+        "--cpu-thread-budget"
+        "4"
+        "--"
+        "bin/rocjitsu_tests"
+        "--gtest_filter=EffectiveConfigTest.ReadsNativeLaunchConfigHandoff"
+)
+
 function(rj_detect_kfd_gfx_target_versions out_var)
     set(_versions)
     foreach(

emulation/rocjitsu/tests/config_test.cpp

@@ -1233,6 +1233,34 @@ TEST(EffectiveConfigTest, ReportsAnUnwritableRuntimeDirectory) {
       std::runtime_error);
 }
 
+// This case is registered as a native CLI test because it expects the launcher
+// to have created the invocation handoff before this child process starts.
+TEST(EffectiveConfigTest, ReadsNativeLaunchConfigHandoff) {
+  const char *invocation_dir = std::getenv(rocjitsu::kRpcInvocationDirEnv);
+  ASSERT_NE(invocation_dir, nullptr);
+  ASSERT_NE(*invocation_dir, '\0');
+
+  const std::filesystem::path invocation_path(invocation_dir);
+  std::ifstream handoff(invocation_path / "config_path");
+  ASSERT_TRUE(handoff.is_open());
+
+  std::string effective_path;
+  ASSERT_TRUE(std::getline(handoff, effective_path));
+  ASSERT_FALSE(effective_path.empty());
+
+  EXPECT_EQ(std::filesystem::absolute(effective_path).lexically_normal(),
+            (invocation_path / config::kEffectiveConfigName).lexically_normal());
+  ASSERT_TRUE(std::filesystem::exists(effective_path));
+
+  const std::string source_path = test::config_path("gfx942_cdna3.json");
+  const std::string source_before = config::read_config_file(source_path);
+  const auto settings =
+      config::load_execution_thread_settings(effective_path, rocjitsu::kEmbeddedSchema);
+
+  EXPECT_EQ(settings.request.budget, 4u);
+  EXPECT_EQ(config::read_config_file(source_path), source_before);
+}
+
 TEST(ConfigLoaderTest, RejectsUnresolvedAutomaticDbtHandoffWrite) {
   const test::ScopedTempDirectory runtime("rocjitsu-runtime-config-unresolved-");
   test::ScopedEnvironmentVariable runtime_dir("ROCJITSU_RUNTIME_DIR", runtime.path());