3211 
3212     _gc_tracer_stw->report_yc_type(collector_state()->yc_type());
3213 
3214     GCTraceCPUTime tcpu;
3215 
3216     FormatBuffer<> gc_string("Pause ");
3217     if (collector_state()->during_initial_mark_pause()) {
3218       gc_string.append("Initial Mark");
3219     } else if (collector_state()->gcs_are_young()) {
3220       gc_string.append("Young");
3221     } else {
3222       gc_string.append("Mixed");
3223     }
3224     GCTraceTime(Info, gc) tm(gc_string, NULL, gc_cause(), true);
3225 
3226     uint active_workers = AdaptiveSizePolicy::calc_active_workers(workers()->total_workers(),
3227                                                                   workers()->active_workers(),
3228                                                                   Threads::number_of_non_daemon_threads());
3229     workers()->set_active_workers(active_workers);
3230 
3231     g1_policy()->note_gc_start(active_workers);
3232 
3233     TraceCollectorStats tcs(g1mm()->incremental_collection_counters());
3234     TraceMemoryManagerStats tms(false /* fullGC */, gc_cause());
3235 
3236     // If the secondary_free_list is not empty, append it to the
3237     // free_list. No need to wait for the cleanup operation to finish;
3238     // the region allocation code will check the secondary_free_list
3239     // and wait if necessary. If the G1StressConcRegionFreeing flag is
3240     // set, skip this step so that the region allocation code has to
3241     // get entries from the secondary_free_list.
3242     if (!G1StressConcRegionFreeing) {
3243       append_secondary_free_list_if_not_empty_with_lock();
3244     }
3245 
3246     G1HeapTransition heap_transition(this);
3247     size_t heap_used_bytes_before_gc = used();
3248 
3249     assert(check_young_list_well_formed(), "young list should be well formed");
3250 
3251     // Don't dynamically change the number of GC threads this early.  A value of

3211 
3212     _gc_tracer_stw->report_yc_type(collector_state()->yc_type());
3213 
3214     GCTraceCPUTime tcpu;
3215 
3216     FormatBuffer<> gc_string("Pause ");
3217     if (collector_state()->during_initial_mark_pause()) {
3218       gc_string.append("Initial Mark");
3219     } else if (collector_state()->gcs_are_young()) {
3220       gc_string.append("Young");
3221     } else {
3222       gc_string.append("Mixed");
3223     }
3224     GCTraceTime(Info, gc) tm(gc_string, NULL, gc_cause(), true);
3225 
3226     uint active_workers = AdaptiveSizePolicy::calc_active_workers(workers()->total_workers(),
3227                                                                   workers()->active_workers(),
3228                                                                   Threads::number_of_non_daemon_threads());
3229     workers()->set_active_workers(active_workers);
3230 
3231     g1_policy()->note_gc_start();
3232 
3233     TraceCollectorStats tcs(g1mm()->incremental_collection_counters());
3234     TraceMemoryManagerStats tms(false /* fullGC */, gc_cause());
3235 
3236     // If the secondary_free_list is not empty, append it to the
3237     // free_list. No need to wait for the cleanup operation to finish;
3238     // the region allocation code will check the secondary_free_list
3239     // and wait if necessary. If the G1StressConcRegionFreeing flag is
3240     // set, skip this step so that the region allocation code has to
3241     // get entries from the secondary_free_list.
3242     if (!G1StressConcRegionFreeing) {
3243       append_secondary_free_list_if_not_empty_with_lock();
3244     }
3245 
3246     G1HeapTransition heap_transition(this);
3247     size_t heap_used_bytes_before_gc = used();
3248 
3249     assert(check_young_list_well_formed(), "young list should be well formed");
3250 
3251     // Don't dynamically change the number of GC threads this early.  A value of