1 /*
   2  * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
   3  * ORACLE PROPRIETARY/CONFIDENTIAL.  Use is subject to license terms.
   4  */
   5 
   6 #include "precompiled.hpp"
   7 #include "gc/z/zPhysicalMemory.inline.hpp"
   8 #include "utilities/debug.hpp"
   9 #include "unittest.hpp"
  10 
  11 #if defined(AMD64)
  12 
  13 TEST(ZPhysicalMemorySegmentTest, split) {
  14   const size_t SegmentSize = 2 * M;
  15 
  16   ZPhysicalMemorySegment seg(0, 10 * SegmentSize);
  17 
  18   ZPhysicalMemorySegment seg_split0 = seg.split(0 * SegmentSize);
  19   EXPECT_EQ(seg_split0.size(),  0 * SegmentSize);
  20   EXPECT_EQ(       seg.size(), 10 * SegmentSize);
  21 
  22   ZPhysicalMemorySegment seg_split1 = seg.split(5 * SegmentSize);
  23   EXPECT_EQ(seg_split1.size(),  5 * SegmentSize);
  24   EXPECT_EQ(       seg.size(),  5 * SegmentSize);
  25 
  26   ZPhysicalMemorySegment seg_split2 = seg.split(5 * SegmentSize);
  27   EXPECT_EQ(seg_split2.size(),  5 * SegmentSize);
  28   EXPECT_EQ(       seg.size(),  0 * SegmentSize);
  29 
  30   ZPhysicalMemorySegment seg_split3 = seg.split(0 * SegmentSize);
  31   EXPECT_EQ(seg_split3.size(),  0 * SegmentSize);
  32   EXPECT_EQ(       seg.size(),  0 * SegmentSize);
  33 }
  34 
  35 TEST(ZPhysicalMemoryTest, split) {
  36   const size_t SegmentSize = 2 * M;
  37 
  38   ZPhysicalMemoryManager pmem_manager(10 * SegmentSize, SegmentSize);
  39 
  40   ZPhysicalMemory pmem = pmem_manager.alloc(8 * SegmentSize);
  41   EXPECT_EQ(pmem.nsegments(), 1u) << "wrong number of segments";
  42 
  43   ZPhysicalMemory split0_pmem = pmem.split(SegmentSize);
  44   EXPECT_EQ(split0_pmem.nsegments(), 1u);
  45   EXPECT_EQ(       pmem.nsegments(), 1u);
  46   EXPECT_EQ(split0_pmem.size(), 1 * SegmentSize);
  47   EXPECT_EQ(       pmem.size(), 7 * SegmentSize);
  48 
  49   ZPhysicalMemory split1_pmem = pmem.split(2 * SegmentSize);
  50   EXPECT_EQ(split1_pmem.nsegments(), 1u);
  51   EXPECT_EQ(       pmem.nsegments(), 1u);
  52   EXPECT_EQ(split1_pmem.size(), 2 * SegmentSize);
  53   EXPECT_EQ(       pmem.size(), 5 * SegmentSize);
  54 
  55   ZPhysicalMemory split2_pmem = pmem.split(5 * SegmentSize);
  56   EXPECT_EQ(split2_pmem.nsegments(), 1u);
  57   EXPECT_EQ(       pmem.nsegments(), 1u);
  58   EXPECT_EQ(split2_pmem.size(), 5 * SegmentSize);
  59   EXPECT_EQ(       pmem.size(), 0 * SegmentSize);
  60 }
  61 
  62 #endif