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Make VL_LOCK_SPINS configurable 

It's unlikely one value fits all use case, so making VL_LOCK_SPINS
configurable at model build time.

For testing, we reduce the value as we expect high contention.
This commit is contained in:
Geza Lore 2023-10-21 15:29:18 +01:00
parent eae942b91c
commit b78ea06829
2 changed files with 5 additions and 0 deletions
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2
include/verilated.h
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@ -164,7 +164,9 @@ inline constexpr size_t roundUpToMultipleOf(size_t value) {
// Return current thread ID (or 0), not super fast, cache if needed // Return current thread ID (or 0), not super fast, cache if needed
extern uint32_t VL_THREAD_ID() VL_MT_SAFE; extern uint32_t VL_THREAD_ID() VL_MT_SAFE;
#ifndef VL_LOCK_SPINS
#define VL_LOCK_SPINS 50000 /// Number of times to spin for a mutex before yielding #define VL_LOCK_SPINS 50000 /// Number of times to spin for a mutex before yielding
#endif
/// Mutex, wrapped to allow -fthread_safety checks /// Mutex, wrapped to allow -fthread_safety checks
class VL_CAPABILITY("mutex") VerilatedMutex final { class VL_CAPABILITY("mutex") VerilatedMutex final {

3
test_regress/Makefile_obj
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@ -39,6 +39,9 @@ CPPFLAGS += $(CPPFLAGS_DRIVER)
CPPFLAGS += $(CPPFLAGS_DRIVER2) CPPFLAGS += $(CPPFLAGS_DRIVER2)
CPPFLAGS += $(CPPFLAGS_ADD) CPPFLAGS += $(CPPFLAGS_ADD)
# Reduce spin count for faster testing
CPPFLAGS += -DVL_LOCK_SPINS=10000
ifeq ($(CFG_WITH_LONGTESTS),yes) ifeq ($(CFG_WITH_LONGTESTS),yes)
ifeq ($(DRIVER_STD),newest) ifeq ($(DRIVER_STD),newest)
CPPFLAGS += $(CFG_CXXFLAGS_STD) CPPFLAGS += $(CFG_CXXFLAGS_STD)