Touch all stack memory in scheduler.

lib/pls/CMakeLists.txt

@@ -68,12 +68,14 @@ if (PLS_PROFILER)
 else ()
     set(PLS_PROFILING_ENABLED false)
 endif ()
+message("-- PLS Profiler: ${PLS_PROFILER}")
 option(SLEEP_WORKERS "Enable sleeping workers if queues are empty" OFF)
 if (SLEEP_WORKERS)
     set(PLS_SLEEP_WORKERS_ON_EMPTY true)
 else ()
     set(PLS_SLEEP_WORKERS_ON_EMPTY false)
 endif ()
+message("-- Sleep Workers: ${SLEEP_WORKERS}")
 
 configure_file(include/pls/internal/build_flavour.h.in include/pls/internal/build_flavour.h)
 

lib/pls/src/internal/scheduling/lock_free/task_manager.cpp

@@ -16,6 +16,9 @@ task_manager::task_manager(unsigned thread_id,
 
   for (size_t i = 0; i < num_tasks; i++) {
     char *stack_memory = stack_allocator->allocate_stack(stack_size);
+    for (size_t j = 0; j < stack_size; j += base::system_details::CACHE_LINE_SIZE) {
+      stack_memory[j] = 'a'; // Touch all stacks, forces the OS to actually allocate them
+    }
     tasks_.emplace_back(std::make_unique<task>(stack_memory, stack_size, i, thread_id));
 
     if (i > 0) {