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Add timing stats for IdString garbage collection

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This commit is contained in:
Robert O'Callahan 2025-10-17 12:15:53 +13:00 • committed by Robert O'Callahan
parent cd47727c8b
commit 7371388e1d
5 changed files with 22 additions and 0 deletions
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2
kernel/driver.cc
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@ -709,6 +709,8 @@ int main(int argc, char **argv)
total_ns += it.second->runtime_ns + 1;
timedat.insert(make_tuple(it.second->runtime_ns + 1, it.second->call_counter, it.first));
}
timedat.insert(make_tuple(RTLIL::OwningIdString::garbage_collection_ns() + 1,
RTLIL::OwningIdString::garbage_collection_count(), "id_gc"));
if (timing_details)
{

5
kernel/register.cc
View file

@ -129,6 +129,11 @@ void Pass::post_execute(Pass::pre_post_exec_state_t state)
int64_t time_ns = PerformanceTimer::query() - state.begin_ns;
runtime_ns += time_ns;
current_pass = state.parent_pass;
subtract_from_current_runtime_ns(time_ns);
}
void Pass::subtract_from_current_runtime_ns(int64_t time_ns)
{
if (current_pass)
current_pass->runtime_ns -= time_ns;
}

2
kernel/register.h
View file

@ -95,6 +95,8 @@ struct Pass
bool experimental_flag = false;
bool internal_flag = false;
static void subtract_from_current_runtime_ns(int64_t time_ns);
void experimental() {
experimental_flag = true;
}

8
kernel/rtlil.cc
View file

@ -243,8 +243,12 @@ struct IdStringCollector {
std::unordered_set<int> live;
};
int64_t RTLIL::OwningIdString::gc_ns;
int RTLIL::OwningIdString::gc_count;
void RTLIL::OwningIdString::collect_garbage()
{
int64_t start = PerformanceTimer::query();
#ifndef YOSYS_NO_IDS_REFCNT
IdStringCollector collector;
for (auto &[idx, design] : *RTLIL::Design::get_all_designs()) {
@ -288,6 +292,10 @@ void RTLIL::OwningIdString::collect_garbage()
it = global_autoidx_id_prefix_storage_.erase(it);
}
#endif
int64_t time_ns = PerformanceTimer::query() - start;
Pass::subtract_from_current_runtime_ns(time_ns);
gc_ns += time_ns;
++gc_count;
}
dict<std::string, std::string> RTLIL::constpad;

5
kernel/rtlil.h
View file

@ -578,6 +578,8 @@ struct RTLIL::OwningIdString : public RTLIL::IdString {
// Collect all non-owning references.
static void collect_garbage();
static int64_t garbage_collection_ns() { return gc_ns; }
static int garbage_collection_count() { return gc_count; }
// Used by the ID() macro to create an IdString with no destructor whose string will
// never be released. If ID() creates a closure-static `OwningIdString` then
@ -589,6 +591,9 @@ struct RTLIL::OwningIdString : public RTLIL::IdString {
return result;
}
private:
static int64_t gc_ns;
static int gc_count;
void get_reference()
{
get_reference(index_);