Add way to print JIT related info at shutdown
Added a runtime option called -XX:DumpJITInfoOnShutdown with prints
various interesting JIT statistics during the shutdown of the runtime
if enabled.
Example of running EvaluateAndApplyChanges with the option:
I art : Code cache size=427KB data cache size=84KB num methods=1598
I art : Start Dumping histograms for 1598 iterations for JIT timings
I art : Compiling: Sum: 727.850ms 99% C.I. 135us-4402us Avg: 455.475us Max: 15567us
I art : Verifying: Sum: 191.074ms 99% C.I. 19us-1450.500us Avg: 119.570us Max: 5142us
I art : TrimMaps: Sum: 62.053ms 99% C.I. 13us-199.374us Avg: 38.831us Max: 10058us
I art : MakeExecutable: Sum: 11.153ms 99% C.I. 4us-47us Avg: 6.979us Max: 47us
I art : Initializing: Sum: 7.991ms 99% C.I. 1us-49.781us Avg: 5us Max: 4852us
I art : Done Dumping histograms
Bug: 17950037
Change-Id: I23538b24f947e5f6934f55579b8baa9d806eb3d5
diff --git a/runtime/jit/jit.cc b/runtime/jit/jit.cc
index 539c181..9b89459 100644
--- a/runtime/jit/jit.cc
+++ b/runtime/jit/jit.cc
@@ -40,16 +40,32 @@
options.GetOrDefault(RuntimeArgumentMap::JITCodeCacheCapacity);
jit_options->compile_threshold_ =
options.GetOrDefault(RuntimeArgumentMap::JITCompileThreshold);
+ jit_options->dump_info_on_shutdown_ =
+ options.Exists(RuntimeArgumentMap::DumpJITInfoOnShutdown);
return jit_options;
}
+void Jit::DumpInfo(std::ostream& os) {
+ os << "Code cache size=" << PrettySize(code_cache_->CodeCacheSize())
+ << " data cache size=" << PrettySize(code_cache_->DataCacheSize())
+ << " num methods=" << code_cache_->NumMethods()
+ << "\n";
+ cumulative_timings_.Dump(os);
+}
+
+void Jit::AddTimingLogger(const TimingLogger& logger) {
+ cumulative_timings_.AddLogger(logger);
+}
+
Jit::Jit()
: jit_library_handle_(nullptr), jit_compiler_handle_(nullptr), jit_load_(nullptr),
- jit_compile_method_(nullptr) {
+ jit_compile_method_(nullptr), dump_info_on_shutdown_(false),
+ cumulative_timings_("JIT timings") {
}
Jit* Jit::Create(JitOptions* options, std::string* error_msg) {
std::unique_ptr<Jit> jit(new Jit);
+ jit->dump_info_on_shutdown_ = options->DumpJitInfoOnShutdown();
if (!jit->LoadCompiler(error_msg)) {
return nullptr;
}
@@ -133,6 +149,9 @@
}
Jit::~Jit() {
+ if (dump_info_on_shutdown_) {
+ DumpInfo(LOG(INFO));
+ }
DeleteThreadPool();
if (jit_compiler_handle_ != nullptr) {
jit_unload_(jit_compiler_handle_);