void gc_gen_stats_verbose(GC_Gen* gc)
{
GC_Gen_Stats* stats = gc->stats;
Boolean is_los_collected = stats->is_los_collected;
if (collect_is_minor()){
TRACE2("gc.space", "GC: NOS Collection stats: "
<<"\nGC: " << (gc_is_gen_mode()?"generational":"nongenerational")
<<"\nGC: collection algo: " << (minor_is_semispace()?"semi-space":"partial-forward")
<<"\nGC: num surviving objs: " << stats->nos_surviving_obj_num_minor
<<"\nGC: size surviving objs: " << verbose_print_size(stats->nos_surviving_obj_size_minor)
<<"\nGC: surviving ratio: " << (int)(stats->nos_surviving_ratio_minor*100) << "%\n");
}else{
TRACE2("gc.space", "GC: MOS Collection stats: "
<<"\nGC: collection algo: " << (major_is_marksweep()?"mark-sweep":"slide compact")
<<"\nGC: num surviving objs: "<<stats->nos_mos_suviving_obj_num_major
<<"\nGC: size surviving objs: "<<verbose_print_size(stats->nos_mos_suviving_obj_size_major)
<<"\nGC: surviving ratio: "<<(int)(stats->nos_mos_suviving_ratio_major*100)<<"%\n");
}
if(stats->is_los_collected) { /*if los is collected, need to output los related info*/
TRACE2("gc.space", "GC: Lspace Collection stats: "
<<"\nGC: collection algo: "<<(collect_is_major()?"slide compact":"mark sweep")
<<"\nGC: num surviving objs: "<<stats->los_suviving_obj_num
<<"\nGC: size surviving objs: "<<verbose_print_size(stats->los_suviving_obj_size)
<<"\nGC: surviving ratio: "<<(int)(stats->los_surviving_ratio*100)<<"%\n");
}
}
void mutator_destruct(GC* gc, void *unused_gc_information)
{
Mutator *mutator = (Mutator *)gc_get_tls();
alloc_context_reset((Allocator*)mutator);
lock(gc->mutator_list_lock); // vvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
#ifdef USE_UNIQUE_MARK_SWEEP_GC
allocactor_destruct_local_chunks((Allocator*)mutator);
#endif
mutator_register_new_obj_size(mutator);
volatile Mutator *temp = gc->mutator_list;
if (temp == mutator) { /* it is at the head of the list */
gc->mutator_list = temp->next;
} else {
while (temp->next != mutator) {
temp = temp->next;
assert(temp);
}
temp->next = mutator->next;
}
gc->num_mutators--;
unlock(gc->mutator_list_lock); // ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
if(gc_is_gen_mode()){ /* put back the remset when a mutator exits */
pool_put_entry(gc->metadata->mutator_remset_pool, mutator->rem_set);
mutator->rem_set = NULL;
}
if(mutator->obj_with_fin){
pool_put_entry(gc->finref_metadata->obj_with_fin_pool, mutator->obj_with_fin);
mutator->obj_with_fin = NULL;
}
lock(mutator->dirty_set_lock);
if( mutator->dirty_set != NULL){
if(vector_block_is_empty(mutator->dirty_set))
pool_put_entry(gc->metadata->free_set_pool, mutator->dirty_set);
else{ /* FIXME:: this condition may be released. */
pool_put_entry(gc->metadata->gc_dirty_set_pool, mutator->dirty_set);
mutator->dirty_set = NULL;
}
}
unlock(mutator->dirty_set_lock);
STD_FREE(mutator);
gc_set_tls(NULL);
return;
}
void gc_heap_wrote_object (Managed_Object_Handle p_obj_written )
{
if( !gc_is_gen_mode() || !object_has_ref_field((Partial_Reveal_Object*)p_obj_written))
return;
/* for array copy and object clone */
#ifdef USE_REM_SLOTS
gc_object_write_barrier(p_obj_written);
#else
if( p_obj_written >= nos_boundary ) return;
mutator_rem_obj( p_obj_written );
#endif
return;
}
static void update_referent_field_ignore_finref(GC *gc, Pool *pool)
{
Vector_Block *block = pool_get_entry(pool);
while(block){
POINTER_SIZE_INT *iter = vector_block_iterator_init(block);
for(; !vector_block_iterator_end(block, iter); iter = vector_block_iterator_advance(block, iter)){
REF *p_ref = (REF*)iter;
Partial_Reveal_Object *p_obj = read_slot(p_ref);
assert(p_obj);
REF *p_referent_field = obj_get_referent_field(p_obj);
if(collect_is_fallback())
fallback_update_fw_ref(p_referent_field);
Partial_Reveal_Object *p_referent = read_slot(p_referent_field);
if(!p_referent){ // referent field has been cleared
*p_ref = (REF)NULL;
continue;
}
if(!gc_obj_is_dead(gc, p_referent)){ // referent is alive
if(obj_need_move(gc, p_referent))
if(collect_is_minor()){
assert(obj_is_fw_in_oi(p_referent));
Partial_Reveal_Object* p_new_referent = obj_get_fw_in_oi(p_referent);
write_slot(p_referent_field, p_new_referent);
if(gc_is_gen_mode())
if(addr_belongs_to_nos(p_new_referent) && !addr_belongs_to_nos(p_obj))
collector_remset_add_entry(gc->collectors[0], ( Partial_Reveal_Object**)p_referent_field);
} else {
finref_repset_add_entry(gc, p_referent_field);
}
*p_ref = (REF)NULL;
continue;
}
*p_referent_field = (REF)NULL; /* referent is weakly reachable: clear the referent field */
}
block = pool_get_entry(pool);
}
}
void mutator_initialize(GC* gc, void *unused_gc_information)
{
/* FIXME:: make sure gc_info is cleared */
Mutator *mutator = (Mutator *)STD_MALLOC(sizeof(Mutator));
memset(mutator, 0, sizeof(Mutator));
mutator->alloc_space = gc_get_nos((GC_Gen*)gc);
mutator->gc = gc;
if(gc_is_gen_mode()){
mutator->rem_set = free_set_pool_get_entry(gc->metadata);
assert(vector_block_is_empty(mutator->rem_set));
}
mutator->dirty_set = free_set_pool_get_entry(gc->metadata);
if(!IGNORE_FINREF )
mutator->obj_with_fin = finref_get_free_block(gc);
else
mutator->obj_with_fin = NULL;
#ifdef USE_UNIQUE_MARK_SWEEP_GC
allocator_init_local_chunks((Allocator*)mutator);
#endif
lock(gc->mutator_list_lock); // vvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
mutator->next = (Mutator *)gc->mutator_list;
gc->mutator_list = mutator;
gc->num_mutators++;
/*Begin to measure the mutator thread execution time. */
mutator->time_measurement_start = time_now();
unlock(gc->mutator_list_lock); // ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
gc_set_tls(mutator);
return;
}
/*
* The reason why we don't use identify_dead_refs() to implement this function is
* that we will differentiate phanref from weakref in the future.
*/
static void identify_dead_phanrefs(Collector *collector)
{
GC *gc = collector->gc;
Finref_Metadata *metadata = gc->finref_metadata;
Pool *phanref_pool = metadata->phanref_pool;
if(collect_need_update_repset())
finref_reset_repset(gc);
// collector_reset_repset(collector);
pool_iterator_init(phanref_pool);
Vector_Block *block = pool_iterator_next(phanref_pool);
while(block){
POINTER_SIZE_INT *iter = vector_block_iterator_init(block);
for(; !vector_block_iterator_end(block, iter); iter = vector_block_iterator_advance(block, iter)){
Partial_Reveal_Object **p_ref = (Partial_Reveal_Object **)iter;
Partial_Reveal_Object *p_obj = read_slot((REF*)p_ref);
assert(p_obj);
REF *p_referent_field = obj_get_referent_field(p_obj);
if(collect_is_fallback())
fallback_update_fw_ref(p_referent_field);
Partial_Reveal_Object *p_referent = read_slot(p_referent_field);
if(!p_referent){ // referent field has been cleared
*p_ref = NULL;
continue;
}
if(!gc_obj_is_dead(gc, p_referent)){ // referent is alive
if(obj_need_move(gc, p_referent)){
if(collect_is_minor()){
assert(obj_is_fw_in_oi(p_referent));
Partial_Reveal_Object* p_new_referent = obj_get_fw_in_oi(p_referent);
write_slot(p_referent_field, p_new_referent);
if(gc_is_gen_mode())
if(addr_belongs_to_nos(p_new_referent) && !addr_belongs_to_nos(p_obj))
collector_remset_add_entry(gc->collectors[0], ( Partial_Reveal_Object**)p_referent_field);
} else{ // if(collect_move_object()){ this check is redundant because obj_need_move checks
finref_repset_add_entry(gc, p_referent_field);
}
}
*p_ref = (REF)NULL;
continue;
}
*p_referent_field = (REF)NULL;
#ifdef ORDER_DEBUG
if(ref_file == NULL){
if(order_record){
ref_file = fopen64("RECORD_REF_LOG.log", "w+");
}
else{
ref_file = fopen64("REPLAY_REF_LOG.log", "w+");
}
}
assert(ref_file);
fprintf(ref_file, "GC[%d]: ref (%d, %d) is DEAD!\n", gc->num_collections, p_referent->alloc_tid, p_referent->alloc_count);
fflush(ref_file);
#endif
/* Phantom status: for future use
* if((unsigned int)p_referent & PHANTOM_REF_ENQUEUE_STATUS_MASK){
* // enqueued but not explicitly cleared OR pending for enqueueing
* *iter = NULL;
* }
* resurrect_obj_tree(collector, p_referent_field);
*/
}
block = pool_iterator_next(phanref_pool);
}
// collector_put_repset(collector);
if(collect_need_update_repset()){
finref_put_repset(gc);
finref_add_repset_from_pool(gc, phanref_pool);
}
}
static void identify_dead_refs(GC *gc, Pool *pool)
{
if(collect_need_update_repset())
finref_reset_repset(gc);
pool_iterator_init(pool);
Vector_Block *block = pool_iterator_next(pool);
while(block){
POINTER_SIZE_INT *iter = vector_block_iterator_init(block);
for(; !vector_block_iterator_end(block, iter); iter = vector_block_iterator_advance(block, iter)){
REF *p_ref = (REF*)iter;
Partial_Reveal_Object *p_obj = read_slot(p_ref);
assert(p_obj);
REF *p_referent_field = obj_get_referent_field(p_obj);
if(collect_is_fallback())
fallback_update_fw_ref(p_referent_field);
Partial_Reveal_Object *p_referent = read_slot(p_referent_field);
if(!p_referent){
/* referent field has been cleared. I forgot why we set p_ref with NULL here.
I guess it's because this ref_obj was processed in abother p_ref already, so
there is no need to keep same ref_obj in this p_ref. */
*p_ref = (REF)NULL;
continue;
}
if(!gc_obj_is_dead(gc, p_referent)){ // referent is alive
if(obj_need_move(gc, p_referent)){
if(collect_is_minor()){
assert(obj_is_fw_in_oi(p_referent));
Partial_Reveal_Object* p_new_referent = obj_get_fw_in_oi(p_referent);
write_slot(p_referent_field, p_new_referent);
/* if it's gen mode, and referent stays in NOS, we need keep p_referent_field in collector remset.
This leads to the ref obj live even it is actually only weakly-reachable in next gen-mode collection.
This simplifies the design. Otherwise, we need remember the refobj in MOS seperately and process them seperately. */
if(gc_is_gen_mode())
if(addr_belongs_to_nos(p_new_referent) && !addr_belongs_to_nos(p_obj))
collector_remset_add_entry(gc->collectors[0], ( Partial_Reveal_Object**)p_referent_field);
} else{ // if(collect_move_object()){ the condition is redundant because obj_need_move already checks
finref_repset_add_entry(gc, p_referent_field);
}
}
*p_ref = (REF)NULL;
}else{
/* else, the referent is dead (weakly reachable), clear the referent field */
*p_referent_field = (REF)NULL;
#ifdef ORDER_DEBUG
if(ref_file == NULL){
if(order_record){
ref_file = fopen64("RECORD_REF_LOG.log", "w+");
}
else{
ref_file = fopen64("REPLAY_REF_LOG.log", "w+");
}
}
assert(ref_file);
fprintf(ref_file, "GC[%d]: ref (%d, %d) is DEAD!\n", gc->num_collections, p_referent->alloc_tid, p_referent->alloc_count);
fflush(ref_file);
#endif
/* for dead referent, p_ref is not set NULL. p_ref keeps the ref object, which
will be moved to VM for enqueueing. */
}
}/* for each ref object */
block = pool_iterator_next(pool);
}
if(collect_need_update_repset()){
finref_put_repset(gc);
finref_add_repset_from_pool(gc, pool);
}
}
// Resurrect the obj tree whose root is the obj which p_ref points to
static inline void resurrect_obj_tree(Collector *collector, REF *p_ref)
{
GC *gc = collector->gc;
GC_Metadata *metadata = gc->metadata;
Partial_Reveal_Object *p_obj = read_slot(p_ref);
assert(p_obj && gc_obj_is_dead(gc, p_obj));
void *p_ref_or_obj = p_ref;
Trace_Object_Func trace_object;
/* set trace_object() function */
if(collect_is_minor()){
if(gc_is_gen_mode()){
if(minor_is_forward())
trace_object = trace_obj_in_gen_fw;
else if(minor_is_semispace())
trace_object = trace_obj_in_gen_ss;
else
assert(0);
}else{
if(minor_is_forward())
trace_object = trace_obj_in_nongen_fw;
else if(minor_is_semispace())
trace_object = trace_obj_in_nongen_ss;
else
assert(0);
}
} else if(collect_is_major_normal() || !gc_has_nos()){
p_ref_or_obj = p_obj;
if(gc_has_space_tuner(gc) && (gc->tuner->kind != TRANS_NOTHING)){
trace_object = trace_obj_in_space_tune_marking;
unsigned int obj_size = vm_object_size(p_obj);
#ifdef USE_32BITS_HASHCODE
obj_size += hashcode_is_set(p_obj) ? GC_OBJECT_ALIGNMENT : 0;
#endif
if(!obj_belongs_to_space(p_obj, gc_get_los((GC_Gen*)gc))){
collector->non_los_live_obj_size += obj_size;
collector->segment_live_size[SIZE_TO_SEGMENT_INDEX(obj_size)] += obj_size;
} else {
collector->los_live_obj_size += round_up_to_size(obj_size, KB);
}
} else if(!gc_has_nos()){
trace_object = trace_obj_in_ms_marking;
} else {
trace_object = trace_obj_in_normal_marking;
}
} else if(collect_is_fallback()){
if(major_is_marksweep())
trace_object = trace_obj_in_ms_fallback_marking;
else
trace_object = trace_obj_in_fallback_marking;
} else {
assert(major_is_marksweep());
p_ref_or_obj = p_obj;
if( gc->gc_concurrent_status == GC_CON_NIL )
trace_object = trace_obj_in_ms_marking;
else
trace_object = trace_obj_in_ms_concurrent_mark;
}
collector->trace_stack = free_task_pool_get_entry(metadata);
collector_tracestack_push(collector, p_ref_or_obj);
pool_put_entry(metadata->mark_task_pool, collector->trace_stack);
collector->trace_stack = free_task_pool_get_entry(metadata);
Vector_Block *task_block = pool_get_entry(metadata->mark_task_pool);
while(task_block){
POINTER_SIZE_INT *iter = vector_block_iterator_init(task_block);
while(!vector_block_iterator_end(task_block, iter)){
void *p_ref_or_obj = (void*)*iter;
assert(((collect_is_minor()||collect_is_fallback()) && *(Partial_Reveal_Object **)p_ref_or_obj)
|| ((collect_is_major_normal()||major_is_marksweep()||!gc_has_nos()) && p_ref_or_obj));
trace_object(collector, p_ref_or_obj);
if(collector->result == FALSE) break; /* Resurrection fallback happens; force return */
iter = vector_block_iterator_advance(task_block, iter);
}
vector_stack_clear(task_block);
pool_put_entry(metadata->free_task_pool, task_block);
if(collector->result == FALSE){
gc_task_pool_clear(metadata->mark_task_pool);
break; /* force return */
}
task_block = pool_get_entry(metadata->mark_task_pool);
}
task_block = (Vector_Block*)collector->trace_stack;
vector_stack_clear(task_block);
pool_put_entry(metadata->free_task_pool, task_block);
collector->trace_stack = NULL;
}
GC* gc_parse_options()
{
TRACE2("gc.process", "GC: parse options ...\n");
GC* gc;
/* GC algorithm decision */
/* Step 1: */
char* minor_algo = NULL;
char* major_algo = NULL;
char* unique_algo = NULL;
if (vm_property_is_set("gc.minor_algorithm", VM_PROPERTIES) == 1) {
minor_algo = vm_properties_get_value("gc.minor_algorithm", VM_PROPERTIES);
}
if (vm_property_is_set("gc.major_algorithm", VM_PROPERTIES) == 1) {
major_algo = vm_properties_get_value("gc.major_algorithm", VM_PROPERTIES);
}
if (vm_property_is_set("gc.unique_algorithm", VM_PROPERTIES) == 1) {
unique_algo = vm_properties_get_value("gc.unique_algorithm", VM_PROPERTIES);
}
Boolean has_los = FALSE;
if (vm_property_is_set("gc.has_los", VM_PROPERTIES) == 1) {
has_los = vm_property_get_boolean("gc.has_los");
}
if(unique_algo){
if(minor_algo || major_algo){
LWARN(60, "Generational options cannot be set with unique_algo, ignored.");
}
gc = gc_unique_decide_collection_algo(unique_algo, has_los);
vm_properties_destroy_value(unique_algo);
}else{ /* default */
gc = gc_gen_decide_collection_algo(minor_algo, major_algo, has_los);
if( minor_algo) vm_properties_destroy_value(minor_algo);
if( major_algo) vm_properties_destroy_value(major_algo);
}
if (vm_property_is_set("gc.gen_mode", VM_PROPERTIES) == 1) {
Boolean gen_mode = vm_property_get_boolean("gc.gen_mode");
gc_set_gen_mode(gen_mode);
}
/* Step 2: */
/* NOTE:: this has to stay after above!! */
if (vm_property_is_set("gc.force_major_collect", VM_PROPERTIES) == 1) {
FORCE_FULL_COMPACT = vm_property_get_boolean("gc.force_major_collect");
if(FORCE_FULL_COMPACT){
gc_set_gen_mode(FALSE);
}
}
/* Step 3: */
/* NOTE:: this has to stay after above!! */
gc->generate_barrier = gc_is_gen_mode();
if (vm_property_is_set("gc.generate_barrier", VM_PROPERTIES) == 1) {
Boolean generate_barrier = vm_property_get_boolean("gc.generate_barrier");
gc->generate_barrier = (generate_barrier || gc->generate_barrier);
}
/* /////////////////////////////////////////////////// */
POINTER_SIZE_INT max_heap_size = HEAP_SIZE_DEFAULT;
POINTER_SIZE_INT min_heap_size = min_heap_size_bytes;
if (vm_property_is_set("gc.mx", VM_PROPERTIES) == 1) {
max_heap_size = vm_property_get_size("gc.mx");
if (max_heap_size < min_heap_size){
max_heap_size = min_heap_size;
LWARN(61, "Max heap size you set is too small, reset to {0}MB" << max_heap_size/MB);
}
if (0 == max_heap_size){
max_heap_size = HEAP_SIZE_DEFAULT;
LWARN(62, "Max heap size you set equals to zero, reset to {0}MB" << max_heap_size/MB);
}
min_heap_size = max_heap_size / 10;
if (min_heap_size < min_heap_size_bytes){
min_heap_size = min_heap_size_bytes;
//printf("Min heap size: too small, reset to %d MB! \n", min_heap_size/MB);
}
}
if (vm_property_is_set("gc.ms", VM_PROPERTIES) == 1) {
min_heap_size = vm_property_get_size("gc.ms");
if (min_heap_size < min_heap_size_bytes){
min_heap_size = min_heap_size_bytes;
LWARN(63, "Min heap size you set is too small, reset to {0}MB" << min_heap_size/MB);
}
}
if (min_heap_size > max_heap_size){
max_heap_size = min_heap_size;
LWARN(61, "Max heap size is too small, reset to {0}MB" << max_heap_size/MB);
}
min_heap_size_bytes = min_heap_size;
max_heap_size_bytes = max_heap_size;
if (vm_property_is_set("gc.nos_size", VM_PROPERTIES) == 1) {
NOS_SIZE = vm_property_get_size("gc.nos_size");
}
if (vm_property_is_set("gc.min_nos_size", VM_PROPERTIES) == 1) {
MIN_NOS_SIZE = vm_property_get_size("gc.min_nos_size");
}
if (vm_property_is_set("gc.init_los_size", VM_PROPERTIES) == 1) {
INIT_LOS_SIZE = vm_property_get_size("gc.init_los_size");
}
if (vm_property_is_set("gc.num_collectors", VM_PROPERTIES) == 1) {
unsigned int num = vm_property_get_integer("gc.num_collectors");
NUM_COLLECTORS = (num==0)? NUM_COLLECTORS:num;
}
if (vm_property_is_set("gc.num_conclctors", VM_PROPERTIES) == 1) {
unsigned int num = vm_property_get_integer("gc.num_conclctors");
NUM_CONCLCTORS = (num==0)? NUM_CONCLCTORS:num;
}
// for concurrent GC debug
if (vm_property_is_set("gc.num_con_markers", VM_PROPERTIES) == 1) {
unsigned int num = vm_property_get_integer("gc.num_con_markers");
NUM_CON_MARKERS = (num==0)? NUM_CON_MARKERS:num;
}
if (vm_property_is_set("gc.num_con_sweepers", VM_PROPERTIES) == 1) {
unsigned int num = vm_property_get_integer("gc.num_con_sweepers");
NUM_CON_SWEEPERS = (num==0)? NUM_CON_SWEEPERS:num;
}
if (vm_property_is_set("gc.tospace_size", VM_PROPERTIES) == 1) {
TOSPACE_SIZE = vm_property_get_size("gc.tospace_size");
}
if (vm_property_is_set("gc.mos_reserve_size", VM_PROPERTIES) == 1) {
MOS_RESERVE_SIZE = vm_property_get_size("gc.mos_reserve_size");
}
if (vm_property_is_set("gc.nos_partial_forward", VM_PROPERTIES) == 1) {
NOS_PARTIAL_FORWARD = vm_property_get_boolean("gc.nos_partial_forward");
}
if (vm_property_is_set("gc.minor_collectors", VM_PROPERTIES) == 1) {
MINOR_COLLECTORS = vm_property_get_integer("gc.minor_collectors");
}
if (vm_property_is_set("gc.major_collectors", VM_PROPERTIES) == 1) {
MAJOR_COLLECTORS = vm_property_get_integer("gc.major_collectors");
}
if (vm_property_is_set("gc.ignore_finref", VM_PROPERTIES) == 1) {
IGNORE_FINREF = vm_property_get_boolean("gc.ignore_finref");
}
if (vm_property_is_set("gc.verify", VM_PROPERTIES) == 1) {
char* value = vm_properties_get_value("gc.verify", VM_PROPERTIES);
GC_VERIFY = strdup(value);
vm_properties_destroy_value(value);
}
if (vm_property_is_set("gc.gen_nongen_switch", VM_PROPERTIES) == 1){
GEN_NONGEN_SWITCH= vm_property_get_boolean("gc.gen_nongen_switch");
gc->generate_barrier = TRUE;
}
if (vm_property_is_set("gc.heap_iteration", VM_PROPERTIES) == 1) {
JVMTI_HEAP_ITERATION = vm_property_get_boolean("gc.heap_iteration");
}
if (vm_property_is_set("gc.ignore_vtable_tracing", VM_PROPERTIES) == 1) {
IGNORE_VTABLE_TRACING = vm_property_get_boolean("gc.ignore_vtable_tracing");
}
if (vm_property_is_set("gc.use_large_page", VM_PROPERTIES) == 1){
char* value = vm_properties_get_value("gc.use_large_page", VM_PROPERTIES);
large_page_hint = strdup(value);
vm_properties_destroy_value(value);
}
if (vm_property_is_set("gc.share_los_boundary", VM_PROPERTIES) == 1){
share_los_boundary = vm_property_get_boolean("gc.share_los_boundary");
}
if (vm_property_is_set("gc.ignore_force_gc", VM_PROPERTIES) == 1){
IGNORE_FORCE_GC = vm_property_get_boolean("gc.ignore_force_gc");
}
if (vm_property_is_set("gc.concurrent_gc", VM_PROPERTIES) == 1){
Boolean use_all_concurrent_phase= vm_property_get_boolean("gc.concurrent_gc");
if(use_all_concurrent_phase){
#ifndef USE_UNIQUE_MARK_SWEEP_GC
LDIE(77, "Please define USE_UNIQUE_MARK_SWEEP_GC macro.");
#endif
gc_specify_con_enum();
gc_specify_con_mark();
gc_specify_con_sweep();
gc->generate_barrier = TRUE;
}
}
if (vm_property_is_set("gc.concurrent_enumeration", VM_PROPERTIES) == 1){
Boolean USE_CONCURRENT_ENUMERATION = vm_property_get_boolean("gc.concurrent_enumeration");
if(USE_CONCURRENT_ENUMERATION){
#ifndef USE_UNIQUE_MARK_SWEEP_GC
LDIE(77, "Please define USE_UNIQUE_MARK_SWEEP_GC macro.");
#endif
gc_specify_con_enum();
gc->generate_barrier = TRUE;
}
}
if (vm_property_is_set("gc.concurrent_mark", VM_PROPERTIES) == 1){
Boolean USE_CONCURRENT_MARK = vm_property_get_boolean("gc.concurrent_mark");
if(USE_CONCURRENT_MARK){
#ifndef USE_UNIQUE_MARK_SWEEP_GC
LDIE(77, "Please define USE_UNIQUE_MARK_SWEEP_GC macro.");
#endif
gc_specify_con_mark();
gc->generate_barrier = TRUE;
IGNORE_FINREF = TRUE; /*TODO: finref is unsupported.*/
}
}
if (vm_property_is_set("gc.concurrent_sweep", VM_PROPERTIES) == 1){
Boolean USE_CONCURRENT_SWEEP= vm_property_get_boolean("gc.concurrent_sweep");
if(USE_CONCURRENT_SWEEP){
/*currently, concurrent sweeping only starts after concurrent marking.*/
assert(gc_is_specify_con_mark());
#ifndef USE_UNIQUE_MARK_SWEEP_GC
LDIE(77, "Please define USE_UNIQUE_MARK_SWEEP_GC macro.");
#endif
gc_specify_con_sweep();
IGNORE_FINREF = TRUE; /*TODO: finref is unsupported.*/
}
}
char* concurrent_algo = NULL;
if (vm_property_is_set("gc.concurrent_algorithm", VM_PROPERTIES) == 1) {
concurrent_algo = vm_properties_get_value("gc.concurrent_algorithm", VM_PROPERTIES);
gc_decide_con_algo(concurrent_algo);
}else if(gc_is_specify_con_gc()){
gc_set_default_con_algo();
}
char* cc_scheduler = NULL;
if (vm_property_is_set("gc.cc_scheduler", VM_PROPERTIES) == 1) {
cc_scheduler = vm_properties_get_value("gc.cc_scheduler", VM_PROPERTIES);
gc_decide_cc_scheduler_kind(cc_scheduler);
}else if(gc_is_specify_con_gc()){
gc_set_default_cc_scheduler_kind();
}
#if defined(ALLOC_ZEROING) && defined(ALLOC_PREFETCH)
if(vm_property_is_set("gc.prefetch",VM_PROPERTIES) ==1) {
PREFETCH_ENABLED = vm_property_get_boolean("gc.prefetch");
}
if(vm_property_is_set("gc.prefetch_distance",VM_PROPERTIES)==1) {
PREFETCH_DISTANCE = vm_property_get_size("gc.prefetch_distance");
if(!PREFETCH_ENABLED) {
LWARN(64, "Prefetch distance set with Prefetch disabled!");
}
}
if(vm_property_is_set("gc.prefetch_stride",VM_PROPERTIES)==1) {
PREFETCH_STRIDE = vm_property_get_size("gc.prefetch_stride");
if(!PREFETCH_ENABLED) {
LWARN(65, "Prefetch stride set with Prefetch disabled!");
}
}
if(vm_property_is_set("gc.zeroing_size",VM_PROPERTIES)==1) {
ZEROING_SIZE = vm_property_get_size("gc.zeroing_size");
}
#endif
#ifdef PREFETCH_SUPPORTED
if(vm_property_is_set("gc.mark_prefetch",VM_PROPERTIES) ==1) {
mark_prefetch = vm_property_get_boolean("gc.mark_prefetch");
}
#endif
return gc;
}
JNIEXPORT jboolean JNICALL Java_org_apache_harmony_drlvm_gc_1gen_GCHelper_getGenMode(JNIEnv *e, jclass c)
{
return (jboolean)gc_is_gen_mode();
}
void gc_gen_mode_adapt(GC_Gen* gc, int64 pause_time)
{
if(GEN_NONGEN_SWITCH == FALSE) return;
Blocked_Space* nos = (Blocked_Space*)gc->nos;
Blocked_Space* mos = (Blocked_Space*)gc->mos;
Gen_Mode_Adaptor* gen_mode_adaptor = gc->gen_mode_adaptor;
POINTER_SIZE_INT mos_free_size = blocked_space_free_mem_size(mos);
POINTER_SIZE_INT nos_free_size = blocked_space_free_mem_size(nos);
POINTER_SIZE_INT total_free_size = mos_free_size + nos_free_size;
if(collect_is_major()) {
assert(!gc_is_gen_mode());
if(gen_mode_adaptor->major_survive_ratio_threshold != 0 && mos->survive_ratio > gen_mode_adaptor->major_survive_ratio_threshold){
if(gen_mode_adaptor->major_repeat_count > MAX_MAJOR_REPEAT_COUNT ){
gc->force_gen_mode = TRUE;
gc_set_gen_mode(TRUE);
gc->next_collect_force_major = FALSE;
return;
}else{
gen_mode_adaptor->major_repeat_count++;
}
}else{
gen_mode_adaptor->major_repeat_count = 1;
}
}else{
/*compute throughput*/
if(!collect_last_is_minor((GC*)gc)){
gen_mode_adaptor->nongen_minor_throughput = 1.0f;
}
if(gc->force_gen_mode){
if(pause_time!=0){
if(gen_mode_adaptor->gen_minor_throughput != 0)
gen_mode_adaptor->gen_minor_throughput = (gen_mode_adaptor->gen_minor_throughput + (float) nos_free_size/(float)pause_time)/2.0f;
else
gen_mode_adaptor->gen_minor_throughput =(float) nos_free_size/(float)pause_time;
}
}else{
if(pause_time!=0){
if(gen_mode_adaptor->gen_minor_throughput != 1.0f)
gen_mode_adaptor->nongen_minor_throughput = (gen_mode_adaptor->nongen_minor_throughput + (float) nos_free_size/(float)pause_time)/2.0f;
else
gen_mode_adaptor->nongen_minor_throughput = (float) nos_free_size/(float)pause_time;
}
}
if(gen_mode_adaptor->nongen_minor_throughput <= gen_mode_adaptor->gen_minor_throughput ){
if( !collect_last_is_minor((GC*)gc) ){
gen_mode_adaptor->major_survive_ratio_threshold = mos->survive_ratio;
}else if( !gc->force_gen_mode ){
gc->force_gen_mode = TRUE;
gen_mode_adaptor->gen_mode_trial_count = MAX_INT32;
}
}
if(gc->next_collect_force_major && !gc->force_gen_mode){
gc->next_collect_force_major = FALSE;
gc->force_gen_mode = TRUE;
gen_mode_adaptor->gen_mode_trial_count = 2;
}else if( collect_last_is_minor((GC*)gc) && gc->force_gen_mode){
gen_mode_adaptor->gen_mode_trial_count = MAX_INT32;
}
if(gc->force_gen_mode && (total_free_size <= ((float)min_nos_size_bytes) * 1.3 )){
gc->force_gen_mode = FALSE;
gc_set_gen_mode(FALSE);
gc->next_collect_force_major = TRUE;
gen_mode_adaptor->gen_mode_trial_count = 0;
return;
}
if( gc->force_gen_mode ){
assert( gen_mode_adaptor->gen_mode_trial_count >= 0);
gen_mode_adaptor->gen_mode_trial_count --;
if( gen_mode_adaptor->gen_mode_trial_count >= 0){
gc_set_gen_mode(TRUE);
return;
}
gc->force_gen_mode = FALSE;
gc->next_collect_force_major = TRUE;
gen_mode_adaptor->gen_mode_trial_count = 0;
}
}
gc_set_gen_mode(FALSE);
return;
}
void gc_gen_adapt(GC_Gen* gc, int64 pause_time)
{
gc_decide_next_collect(gc, pause_time);
if(NOS_SIZE) return;
Blocked_Space* nos = (Blocked_Space*)gc->nos;
Blocked_Space* mos = (Blocked_Space*)gc->mos;
POINTER_SIZE_INT new_nos_size;
POINTER_SIZE_INT new_mos_size;
Boolean result = gc_compute_new_space_size(gc, &new_mos_size, &new_nos_size);
if(!result) return;
POINTER_SIZE_INT curr_nos_size = space_committed_size((Space*)nos);
//if( ABS_DIFF(new_nos_size, curr_nos_size) < NOS_COPY_RESERVE_DELTA )
if( new_nos_size == curr_nos_size ){
return;
}else if ( new_nos_size >= curr_nos_size ){
INFO2("gc.process", "GC: gc_gen space adjustment after GC["<<gc->num_collections<<"] ...");
POINTER_SIZE_INT adapt_size = new_nos_size - curr_nos_size;
INFO2("gc.space", "GC: Space Adapt: mos ---> nos ("
<<verbose_print_size(adapt_size)
<<" size was transferred from mos to nos)\n");
} else {
INFO2("gc.process", "GC: gc_gen space adjustment after GC["<<gc->num_collections<<"] ...");
POINTER_SIZE_INT adapt_size = curr_nos_size - new_nos_size;
INFO2("gc.space", "GC: Space Adapt: nos ---> mos ("
<<verbose_print_size(adapt_size)
<<" size was transferred from nos to mos)\n");
}
/* below are ajustment */
POINTER_SIZE_INT curr_heap_commit_end;
if(LOS_ADJUST_BOUNDARY)
curr_heap_commit_end = (POINTER_SIZE_INT)gc->heap_start + LOS_HEAD_RESERVE_FOR_HEAP_BASE + gc->committed_heap_size;
else
curr_heap_commit_end = (POINTER_SIZE_INT)nos->heap_start + nos->committed_heap_size;
void* new_nos_boundary = (void*)(curr_heap_commit_end - new_nos_size);
nos_boundary = nos_space_adjust((Space*)nos, new_nos_boundary, new_nos_size);
/* it's possible that nos can't accept the specified nos boundary, it gives a new one. */
assert(nos_boundary <= new_nos_boundary);
new_mos_size -= (POINTER_SIZE_INT)new_nos_boundary - (POINTER_SIZE_INT)nos_boundary;
blocked_space_adjust(mos, mos->heap_start, new_mos_size);
Block_Header* mos_last_block = (Block_Header*)&mos->blocks[mos->num_managed_blocks-1];
assert(mos->ceiling_block_idx == mos_last_block->block_idx);
Block_Header* nos_first_block = (Block_Header*)&nos->blocks[0];
/* this is redundant, because blocked_space_adjust doesn't set last block next to NULL.
mos_last_block->next = nos_first_block; */
if( gc_is_gen_mode())
HelperClass_set_NosBoundary(nos_boundary);
return;
}