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src/hotspot/share/gc/shenandoah/shenandoahAllocRequest.hpp

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@@ -1,7 +1,7 @@
  /*
-  * Copyright (c) 2018, 2019, Red Hat, Inc. All rights reserved.
+  * Copyright (c) 2018, 2020, Red Hat, Inc. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.

@@ -24,18 +24,20 @@
  
  #ifndef SHARE_GC_SHENANDOAH_SHENANDOAHALLOCREQUEST_HPP
  #define SHARE_GC_SHENANDOAH_SHENANDOAHALLOCREQUEST_HPP
  
  #include "memory/allocation.hpp"
+ #include "gc/shenandoah/mode/shenandoahGenerationalMode.hpp"
  
  class ShenandoahAllocRequest : StackObj {
  public:
    enum Type {
      _alloc_shared,      // Allocate common, outside of TLAB
-     _alloc_shared_gc,   // Allocate common, outside of GCLAB
+     _alloc_shared_gc,   // Allocate common, outside of GCLAB/PLAB
      _alloc_tlab,        // Allocate TLAB
      _alloc_gclab,       // Allocate GCLAB
+     _alloc_plab,        // Allocate PLAB
      _ALLOC_LIMIT
    };
  
    static const char* alloc_type_to_string(Type type) {
      switch (type) {

@@ -45,10 +47,12 @@
          return "Shared GC";
        case _alloc_tlab:
          return "TLAB";
        case _alloc_gclab:
          return "GCLAB";
+       case _alloc_plab:
+         return "PLAB";
        default:
          ShouldNotReachHere();
          return "";
      }
    }

@@ -56,37 +60,42 @@
  private:
    size_t _min_size;
    size_t _requested_size;
    size_t _actual_size;
    Type _alloc_type;
+   ShenandoahRegionAffiliation const _affiliation;
  #ifdef ASSERT
    bool _actual_size_set;
  #endif
  
-   ShenandoahAllocRequest(size_t _min_size, size_t _requested_size, Type _alloc_type) :
+   ShenandoahAllocRequest(size_t _min_size, size_t _requested_size, Type _alloc_type, ShenandoahRegionAffiliation affiliation) :
            _min_size(_min_size), _requested_size(_requested_size),
-           _actual_size(0), _alloc_type(_alloc_type)
+           _actual_size(0), _alloc_type(_alloc_type), _affiliation(affiliation)
  #ifdef ASSERT
            , _actual_size_set(false)
  #endif
    {}
  
  public:
    static inline ShenandoahAllocRequest for_tlab(size_t min_size, size_t requested_size) {
-     return ShenandoahAllocRequest(min_size, requested_size, _alloc_tlab);
+     return ShenandoahAllocRequest(min_size, requested_size, _alloc_tlab, ShenandoahRegionAffiliation::YOUNG_GENERATION);
    }
  
    static inline ShenandoahAllocRequest for_gclab(size_t min_size, size_t requested_size) {
-     return ShenandoahAllocRequest(min_size, requested_size, _alloc_gclab);
+     return ShenandoahAllocRequest(min_size, requested_size, _alloc_gclab, ShenandoahRegionAffiliation::YOUNG_GENERATION);
    }
  
-   static inline ShenandoahAllocRequest for_shared_gc(size_t requested_size) {
-     return ShenandoahAllocRequest(0, requested_size, _alloc_shared_gc);
+   static inline ShenandoahAllocRequest for_plab(size_t min_size, size_t requested_size) {
+     return ShenandoahAllocRequest(min_size, requested_size, _alloc_plab, ShenandoahRegionAffiliation::OLD_GENERATION);
+   }
+ 
+   static inline ShenandoahAllocRequest for_shared_gc(size_t requested_size, ShenandoahRegionAffiliation affiliation) {
+     return ShenandoahAllocRequest(0, requested_size, _alloc_shared_gc, affiliation);
    }
  
    static inline ShenandoahAllocRequest for_shared(size_t requested_size) {
-     return ShenandoahAllocRequest(0, requested_size, _alloc_shared);
+     return ShenandoahAllocRequest(0, requested_size, _alloc_shared, ShenandoahRegionAffiliation::YOUNG_GENERATION);
    }
  
    inline size_t size() {
      return _requested_size;
    }

@@ -121,10 +130,11 @@
      switch (_alloc_type) {
        case _alloc_tlab:
        case _alloc_shared:
          return true;
        case _alloc_gclab:
+       case _alloc_plab:
        case _alloc_shared_gc:
          return false;
        default:
          ShouldNotReachHere();
          return false;

@@ -135,10 +145,11 @@
      switch (_alloc_type) {
        case _alloc_tlab:
        case _alloc_shared:
          return false;
        case _alloc_gclab:
+       case _alloc_plab:
        case _alloc_shared_gc:
          return true;
        default:
          ShouldNotReachHere();
          return false;

@@ -147,17 +158,30 @@
  
    inline bool is_lab_alloc() {
      switch (_alloc_type) {
        case _alloc_tlab:
        case _alloc_gclab:
+       case _alloc_plab:
          return true;
        case _alloc_shared:
        case _alloc_shared_gc:
          return false;
        default:
          ShouldNotReachHere();
          return false;
      }
    }
+ 
+   bool is_old() {
+     return _affiliation == OLD_GENERATION;
+   }
+ 
+   bool is_young() {
+     return _affiliation == YOUNG_GENERATION;
+   }
+ 
+   ShenandoahRegionAffiliation affiliation() const {
+     return _affiliation;
+   }
  };
  
  #endif // SHARE_GC_SHENANDOAH_SHENANDOAHALLOCREQUEST_HPP
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