370   }
 371 
 372   return success;
 373 }
 374 
 375 
 376 void DefNewGeneration::compute_new_size() {
 377   // This is called after a gc that includes the following generation
 378   // (which is required to exist.)  So from-space will normally be empty.
 379   // Note that we check both spaces, since if scavenge failed they revert roles.
 380   // If not we bail out (otherwise we would have to relocate the objects)
 381   if (!from()->is_empty() || !to()->is_empty()) {
 382     return;
 383   }
 384 
 385   int next_level = level() + 1;
 386   GenCollectedHeap* gch = GenCollectedHeap::heap();
 387   assert(next_level < gch->_n_gens,
 388          "DefNewGeneration cannot be an oldest gen");
 389 
 390   Generation* next_gen = gch->_gens[next_level];
 391   size_t old_size = next_gen->capacity();
 392   size_t new_size_before = _virtual_space.committed_size();
 393   size_t min_new_size = spec()->init_size();
 394   size_t max_new_size = reserved().byte_size();
 395   assert(min_new_size <= new_size_before &&
 396          new_size_before <= max_new_size,
 397          "just checking");
 398   // All space sizes must be multiples of Generation::GenGrain.
 399   size_t alignment = Generation::GenGrain;
 400 
 401   // Compute desired new generation size based on NewRatio and
 402   // NewSizeThreadIncrease
 403   size_t desired_new_size = old_size/NewRatio;
 404   int threads_count = Threads::number_of_non_daemon_threads();
 405   size_t thread_increase_size = threads_count * NewSizeThreadIncrease;
 406   desired_new_size = align_size_up(desired_new_size + thread_increase_size, alignment);
 407 
 408   // Adjust new generation size
 409   desired_new_size = MAX2(MIN2(desired_new_size, max_new_size), min_new_size);
 410   assert(desired_new_size <= max_new_size, "just checking");

 370   }
 371 
 372   return success;
 373 }
 374 
 375 
 376 void DefNewGeneration::compute_new_size() {
 377   // This is called after a gc that includes the following generation
 378   // (which is required to exist.)  So from-space will normally be empty.
 379   // Note that we check both spaces, since if scavenge failed they revert roles.
 380   // If not we bail out (otherwise we would have to relocate the objects)
 381   if (!from()->is_empty() || !to()->is_empty()) {
 382     return;
 383   }
 384 
 385   int next_level = level() + 1;
 386   GenCollectedHeap* gch = GenCollectedHeap::heap();
 387   assert(next_level < gch->_n_gens,
 388          "DefNewGeneration cannot be an oldest gen");
 389 
 390   Generation* next_gen = gch->get_gen(next_level);
 391   size_t old_size = next_gen->capacity();
 392   size_t new_size_before = _virtual_space.committed_size();
 393   size_t min_new_size = spec()->init_size();
 394   size_t max_new_size = reserved().byte_size();
 395   assert(min_new_size <= new_size_before &&
 396          new_size_before <= max_new_size,
 397          "just checking");
 398   // All space sizes must be multiples of Generation::GenGrain.
 399   size_t alignment = Generation::GenGrain;
 400 
 401   // Compute desired new generation size based on NewRatio and
 402   // NewSizeThreadIncrease
 403   size_t desired_new_size = old_size/NewRatio;
 404   int threads_count = Threads::number_of_non_daemon_threads();
 405   size_t thread_increase_size = threads_count * NewSizeThreadIncrease;
 406   desired_new_size = align_size_up(desired_new_size + thread_increase_size, alignment);
 407 
 408   // Adjust new generation size
 409   desired_new_size = MAX2(MIN2(desired_new_size, max_new_size), min_new_size);
 410   assert(desired_new_size <= max_new_size, "just checking");