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.h b/runtime/jit/jit.h
index b80015f..6b206d1 100644
--- a/runtime/jit/jit.h
+++ b/runtime/jit/jit.h
@@ -24,6 +24,7 @@
#include "atomic.h"
#include "base/macros.h"
#include "base/mutex.h"
+#include "base/timing_logger.h"
#include "gc_root.h"
#include "jni.h"
#include "object_callbacks.h"
@@ -61,6 +62,11 @@
return code_cache_.get();
}
void DeleteThreadPool();
+ // Dump interesting info: #methods compiled, code vs data size, compile / verify cumulative
+ // loggers.
+ void DumpInfo(std::ostream& os);
+ // Add a timing logger to cumulative_timings_.
+ void AddTimingLogger(const TimingLogger& logger);
private:
Jit();
@@ -73,6 +79,10 @@
void (*jit_unload_)(void*);
bool (*jit_compile_method_)(void*, mirror::ArtMethod*, Thread*);
+ // Performance monitoring.
+ bool dump_info_on_shutdown_;
+ CumulativeLogger cumulative_timings_;
+
std::unique_ptr<jit::JitInstrumentationCache> instrumentation_cache_;
std::unique_ptr<jit::JitCodeCache> code_cache_;
CompilerCallbacks* compiler_callbacks_; // Owned by the jit compiler.
@@ -87,12 +97,16 @@
size_t GetCodeCacheCapacity() const {
return code_cache_capacity_;
}
+ bool DumpJitInfoOnShutdown() const {
+ return dump_info_on_shutdown_;
+ }
private:
size_t code_cache_capacity_;
size_t compile_threshold_;
+ bool dump_info_on_shutdown_;
- JitOptions() : code_cache_capacity_(0), compile_threshold_(0) {
+ JitOptions() : code_cache_capacity_(0), compile_threshold_(0), dump_info_on_shutdown_(false) {
}
};