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/zGlobals.hpp" 26 #include "gc/z/zPhysicalMemory.inline.hpp" 27 #include "utilities/debug.hpp" 28 #include "unittest.hpp" 29 30 #if defined(AMD64) 31 32 TEST(ZPhysicalMemorySegmentTest, split) { 33 ZPhysicalMemorySegment seg(0, 10 * ZGranuleSize); 34 35 ZPhysicalMemorySegment seg_split0 = seg.split(0 * ZGranuleSize); 36 EXPECT_EQ(seg_split0.size(), 0 * ZGranuleSize); 37 EXPECT_EQ( seg.size(), 10 * ZGranuleSize); 38 39 ZPhysicalMemorySegment seg_split1 = seg.split(5 * ZGranuleSize); 40 EXPECT_EQ(seg_split1.size(), 5 * ZGranuleSize); 41 EXPECT_EQ( seg.size(), 5 * ZGranuleSize); 42 43 ZPhysicalMemorySegment seg_split2 = seg.split(5 * ZGranuleSize); 44 EXPECT_EQ(seg_split2.size(), 5 * ZGranuleSize); 45 EXPECT_EQ( seg.size(), 0 * ZGranuleSize); 46 47 ZPhysicalMemorySegment seg_split3 = seg.split(0 * ZGranuleSize); 48 EXPECT_EQ(seg_split3.size(), 0 * ZGranuleSize); 49 EXPECT_EQ( seg.size(), 0 * ZGranuleSize); 50 } 51 52 TEST(ZPhysicalMemoryTest, split) { 53 ZPhysicalMemoryManager pmem_manager(10 * ZGranuleSize); 54 55 pmem_manager.try_ensure_unused_capacity(10 * ZGranuleSize); 56 EXPECT_EQ(pmem_manager.unused_capacity(), 10 * ZGranuleSize); 57 58 ZPhysicalMemory pmem = pmem_manager.alloc(8 * ZGranuleSize); 59 EXPECT_EQ(pmem.nsegments(), 1u) << "wrong number of segments"; 60 61 ZPhysicalMemory split0_pmem = pmem.split(ZGranuleSize); 62 EXPECT_EQ(split0_pmem.nsegments(), 1u); 63 EXPECT_EQ( pmem.nsegments(), 1u); 64 EXPECT_EQ(split0_pmem.size(), 1 * ZGranuleSize); 65 EXPECT_EQ( pmem.size(), 7 * ZGranuleSize); 66 67 ZPhysicalMemory split1_pmem = pmem.split(2 * ZGranuleSize); 68 EXPECT_EQ(split1_pmem.nsegments(), 1u); 69 EXPECT_EQ( pmem.nsegments(), 1u); 70 EXPECT_EQ(split1_pmem.size(), 2 * ZGranuleSize); 71 EXPECT_EQ( pmem.size(), 5 * ZGranuleSize); 72 73 ZPhysicalMemory split2_pmem = pmem.split(5 * ZGranuleSize); 74 EXPECT_EQ(split2_pmem.nsegments(), 1u); 75 EXPECT_EQ( pmem.nsegments(), 1u); 76 EXPECT_EQ(split2_pmem.size(), 5 * ZGranuleSize); 77 EXPECT_EQ( pmem.size(), 0 * ZGranuleSize); 78 } 79 80 #endif