graal-compiler: src/share/vm/runtime/sweeper.cpp comparison

comparison src/share/vm/runtime/sweeper.cpp @ 14518:d8041d695d19

Merged with jdk9/dev/hotspot changeset 3812c088b945

author	twisti
date	Tue, 11 Mar 2014 18:45:59 -0700
parents	2d4a8d3d286b abec000618bf
children	4ca6dc0799b6

comparison

equal deleted inserted replaced

-:f97c5ec83832
+:d8041d695d19
 #define SWEEP(nm)
 #endif
 nmethod* NMethodSweeper::_current                      = NULL; // Current nmethod
 long     NMethodSweeper::_traversals                   = 0;    // Stack scan count, also sweep ID.
+long     NMethodSweeper::_total_nof_code_cache_sweeps  = 0;    // Total number of full sweeps of the code cache
 long     NMethodSweeper::_time_counter                 = 0;    // Virtual time used to periodically invoke sweeper
 long     NMethodSweeper::_last_sweep                   = 0;    // Value of _time_counter when the last sweep happened
 int      NMethodSweeper::_seen                         = 0;    // Nof. nmethod we have currently processed in current pass of CodeCache
 int      NMethodSweeper::_flushed_count                = 0;    // Nof. nmethods flushed in current sweep
 int      NMethodSweeper::_zombified_count              = 0;    // Nof. nmethods made zombie in current sweep
 volatile int  NMethodSweeper::_sweep_started           = 0;    // Flag to control conc sweeper
 volatile int  NMethodSweeper::_bytes_changed           = 0;    // Counts the total nmethod size if the nmethod changed from:
 //   1) alive       -> not_entrant
 //   2) not_entrant -> zombie
 //   3) zombie      -> marked_for_reclamation
+int    NMethodSweeper::_hotness_counter_reset_val       = 0;
-int   NMethodSweeper::_total_nof_methods_reclaimed     = 0;    // Accumulated nof methods flushed
-Tickspan NMethodSweeper::_total_time_sweeping;                 // Accumulated time sweeping
+long   NMethodSweeper::_total_nof_methods_reclaimed     = 0;    // Accumulated nof methods flushed
-Tickspan NMethodSweeper::_total_time_this_sweep;               // Total time this sweep
+long   NMethodSweeper::_total_nof_c2_methods_reclaimed  = 0;    // Accumulated nof methods flushed
-Tickspan NMethodSweeper::_peak_sweep_time;                     // Peak time for a full sweep
+size_t NMethodSweeper::_total_flushed_size              = 0;    // Total number of bytes flushed from the code cache
-Tickspan NMethodSweeper::_peak_sweep_fraction_time;            // Peak time sweeping one fraction
+Tickspan  NMethodSweeper::_total_time_sweeping;                 // Accumulated time sweeping
-int   NMethodSweeper::_hotness_counter_reset_val       = 0;
+Tickspan  NMethodSweeper::_total_time_this_sweep;               // Total time this sweep
+Tickspan  NMethodSweeper::_peak_sweep_time;                     // Peak time for a full sweep
+Tickspan  NMethodSweeper::_peak_sweep_fraction_time;            // Peak time sweeping one fraction
 class MarkActivationClosure: public CodeBlobClosure {
 public:
 virtual void do_code_blob(CodeBlob* cb) {
 //                                              As a result, we invoke the sweeper after
 //                                              15 invocations of 'mark_active_nmethods.
 // Large ReservedCodeCacheSize:   (e.g., 256M + code Cache is 90% full). The formula
 //                                              computes: (256 / 16) - 10 = 6.
 if (!_should_sweep) {
-int time_since_last_sweep = _time_counter - _last_sweep;
+const int time_since_last_sweep = _time_counter - _last_sweep;
-double wait_until_next_sweep = (ReservedCodeCacheSize / (16 * M)) - time_since_last_sweep -
+// ReservedCodeCacheSize has an 'unsigned' type. We need a 'signed' type for max_wait_time,
-CodeCache::reverse_free_ratio();
+// since 'time_since_last_sweep' can be larger than 'max_wait_time'. If that happens using
+// an unsigned type would cause an underflow (wait_until_next_sweep becomes a large positive
+// value) that disables the intended periodic sweeps.
+const int max_wait_time = ReservedCodeCacheSize / (16 * M);
+double wait_until_next_sweep = max_wait_time - time_since_last_sweep - CodeCache::reverse_free_ratio();
+assert(wait_until_next_sweep <= (double)max_wait_time, "Calculation of code cache sweeper interval is incorrect");
 if ((wait_until_next_sweep <= 0.0) || !CompileBroker::should_compile_new_jobs()) {
 _should_sweep = true;
 }
 }
 _sweep_fractions_left--;
 }
 // We are done with sweeping the code cache once.
 if (_sweep_fractions_left == 0) {
+_total_nof_code_cache_sweeps++;
 _last_sweep = _time_counter;
 // Reset flag; temporarily disables sweeper
 _should_sweep = false;
 // If there was enough state change, 'possibly_enable_sweeper()'
 // sets '_should_sweep' to true
 // can further increase by calls to 'report_state_change'.
 if (_should_sweep) {
 _bytes_changed = 0;
 }
 }
-_sweep_started = 0;
+// Release work, because another compiler thread could continue.
+OrderAccess::release_store((int*)&_sweep_started, 0);
 }
 }
 void NMethodSweeper::sweep_code_cache() {
 Ticks sweep_start_counter = Ticks::now();
 const Ticks sweep_end_counter = Ticks::now();
 const Tickspan sweep_time = sweep_end_counter - sweep_start_counter;
 _total_time_sweeping  += sweep_time;
 _total_time_this_sweep += sweep_time;
 _peak_sweep_fraction_time = MAX2(sweep_time, _peak_sweep_fraction_time);
+_total_flushed_size += freed_memory;
 _total_nof_methods_reclaimed += _flushed_count;
 EventSweepCodeCache event(UNTIMED);
 if (event.should_commit()) {
 event.set_starttime(sweep_start_counter);
 assert(!nm->is_locked_by_vm(), "must not flush locked nmethods");
 if (PrintMethodFlushing && Verbose) {
 tty->print_cr("### Nmethod %3d/" PTR_FORMAT " (marked for reclamation) being flushed", nm->compile_id(), nm);
 }
 freed_memory = nm->total_size();
+if (nm->is_compiled_by_c2()) {
+_total_nof_c2_methods_reclaimed++;
+}
 release_nmethod(nm);
 _flushed_count++;
 } else {
 if (PrintMethodFlushing && Verbose) {
 tty->print_cr("### Nmethod %3d/" PTR_FORMAT " (zombie) being marked for reclamation", nm->compile_id(), nm);
 }
 if (nm->is_osr_method()) {
 SWEEP(nm);
 // No inline caches will ever point to osr methods, so we can just remove it
 freed_memory = nm->total_size();
+if (nm->is_compiled_by_c2()) {
+_total_nof_c2_methods_reclaimed++;
+}
 release_nmethod(nm);
 _flushed_count++;
 } else {
 // Code cache state change is tracked in make_zombie()
 nm->make_zombie();
 xtty->print(s.as_string());
 xtty->stamp();
 xtty->end_elem();
 }
 }
+void NMethodSweeper::print() {
+ttyLocker ttyl;
+tty->print_cr("Code cache sweeper statistics:");
+tty->print_cr("  Total sweep time:                %1.0lfms", (double)_total_time_sweeping.value()/1000000);
+tty->print_cr("  Total number of full sweeps:     %ld", _total_nof_code_cache_sweeps);
+tty->print_cr("  Total number of flushed methods: %ld(%ld C2 methods)", _total_nof_methods_reclaimed,
+_total_nof_c2_methods_reclaimed);
+tty->print_cr("  Total size of flushed methods:   " SIZE_FORMAT "kB", _total_flushed_size/K);
+}

Mercurial > hg > graal-compiler

comparison src/share/vm/runtime/sweeper.cpp @ 14518:d8041d695d19