1 /* 2 * Copyright (c) 2016, 2018, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 #include "precompiled.hpp" 25 #include "gc/z/zPhysicalMemory.inline.hpp" 26 #include "utilities/debug.hpp" 27 #include "unittest.hpp" 28 29 #if defined(AMD64) 30 31 TEST(ZPhysicalMemorySegmentTest, split) { 32 const size_t SegmentSize = 2 * M; 33 34 ZPhysicalMemorySegment seg(0, 10 * SegmentSize); 35 36 ZPhysicalMemorySegment seg_split0 = seg.split(0 * SegmentSize); 37 EXPECT_EQ(seg_split0.size(), 0 * SegmentSize); 38 EXPECT_EQ( seg.size(), 10 * SegmentSize); 39 40 ZPhysicalMemorySegment seg_split1 = seg.split(5 * SegmentSize); 41 EXPECT_EQ(seg_split1.size(), 5 * SegmentSize); 42 EXPECT_EQ( seg.size(), 5 * SegmentSize); 43 44 ZPhysicalMemorySegment seg_split2 = seg.split(5 * SegmentSize); 45 EXPECT_EQ(seg_split2.size(), 5 * SegmentSize); 46 EXPECT_EQ( seg.size(), 0 * SegmentSize); 47 48 ZPhysicalMemorySegment seg_split3 = seg.split(0 * SegmentSize); 49 EXPECT_EQ(seg_split3.size(), 0 * SegmentSize); 50 EXPECT_EQ( seg.size(), 0 * SegmentSize); 51 } 52 53 TEST(ZPhysicalMemoryTest, split) { 54 const size_t SegmentSize = 2 * M; 55 56 ZPhysicalMemoryManager pmem_manager(10 * SegmentSize, SegmentSize); 57 58 pmem_manager.try_ensure_unused_capacity(10 * SegmentSize); 59 EXPECT_EQ(pmem_manager.unused_capacity(), 10 * SegmentSize); 60 61 ZPhysicalMemory pmem = pmem_manager.alloc(8 * SegmentSize); 62 EXPECT_EQ(pmem.nsegments(), 1u) << "wrong number of segments"; 63 64 ZPhysicalMemory split0_pmem = pmem.split(SegmentSize); 65 EXPECT_EQ(split0_pmem.nsegments(), 1u); 66 EXPECT_EQ( pmem.nsegments(), 1u); 67 EXPECT_EQ(split0_pmem.size(), 1 * SegmentSize); 68 EXPECT_EQ( pmem.size(), 7 * SegmentSize); 69 70 ZPhysicalMemory split1_pmem = pmem.split(2 * SegmentSize); 71 EXPECT_EQ(split1_pmem.nsegments(), 1u); 72 EXPECT_EQ( pmem.nsegments(), 1u); 73 EXPECT_EQ(split1_pmem.size(), 2 * SegmentSize); 74 EXPECT_EQ( pmem.size(), 5 * SegmentSize); 75 76 ZPhysicalMemory split2_pmem = pmem.split(5 * SegmentSize); 77 EXPECT_EQ(split2_pmem.nsegments(), 1u); 78 EXPECT_EQ( pmem.nsegments(), 1u); 79 EXPECT_EQ(split2_pmem.size(), 5 * SegmentSize); 80 EXPECT_EQ( pmem.size(), 0 * SegmentSize); 81 } 82 83 #endif