test/hotspot/gtest/gc/z/test_zPhysicalMemory.cpp
author pliden
Wed, 13 Mar 2019 11:31:00 +0100
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child 54834 39ba09047e19
permissions -rw-r--r--
8219633: ZGC: Rename ZPageSizeMin to ZGranuleSize Reviewed-by: eosterlund, stefank
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/*
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 * Copyright (c) 2016, 2018, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 */
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#include "precompiled.hpp"
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#include "gc/z/zGlobals.hpp"
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#include "gc/z/zPhysicalMemory.inline.hpp"
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#include "utilities/debug.hpp"
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#include "unittest.hpp"
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#if defined(AMD64)
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TEST(ZPhysicalMemorySegmentTest, split) {
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  ZPhysicalMemorySegment seg(0, 10 * ZGranuleSize);
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  ZPhysicalMemorySegment seg_split0 = seg.split(0 * ZGranuleSize);
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  EXPECT_EQ(seg_split0.size(),  0 * ZGranuleSize);
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  EXPECT_EQ(       seg.size(), 10 * ZGranuleSize);
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  ZPhysicalMemorySegment seg_split1 = seg.split(5 * ZGranuleSize);
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  EXPECT_EQ(seg_split1.size(),  5 * ZGranuleSize);
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  EXPECT_EQ(       seg.size(),  5 * ZGranuleSize);
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  ZPhysicalMemorySegment seg_split2 = seg.split(5 * ZGranuleSize);
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  EXPECT_EQ(seg_split2.size(),  5 * ZGranuleSize);
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  EXPECT_EQ(       seg.size(),  0 * ZGranuleSize);
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  ZPhysicalMemorySegment seg_split3 = seg.split(0 * ZGranuleSize);
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  EXPECT_EQ(seg_split3.size(),  0 * ZGranuleSize);
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  EXPECT_EQ(       seg.size(),  0 * ZGranuleSize);
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}
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TEST(ZPhysicalMemoryTest, split) {
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  ZPhysicalMemoryManager pmem_manager(10 * ZGranuleSize);
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  pmem_manager.try_ensure_unused_capacity(10 * ZGranuleSize);
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  EXPECT_EQ(pmem_manager.unused_capacity(), 10 * ZGranuleSize);
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  ZPhysicalMemory pmem = pmem_manager.alloc(8 * ZGranuleSize);
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  EXPECT_EQ(pmem.nsegments(), 1u) << "wrong number of segments";
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  ZPhysicalMemory split0_pmem = pmem.split(ZGranuleSize);
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  EXPECT_EQ(split0_pmem.nsegments(), 1u);
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  EXPECT_EQ(       pmem.nsegments(), 1u);
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  EXPECT_EQ(split0_pmem.size(), 1 * ZGranuleSize);
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  EXPECT_EQ(       pmem.size(), 7 * ZGranuleSize);
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  ZPhysicalMemory split1_pmem = pmem.split(2 * ZGranuleSize);
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  EXPECT_EQ(split1_pmem.nsegments(), 1u);
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  EXPECT_EQ(       pmem.nsegments(), 1u);
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  EXPECT_EQ(split1_pmem.size(), 2 * ZGranuleSize);
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  EXPECT_EQ(       pmem.size(), 5 * ZGranuleSize);
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  ZPhysicalMemory split2_pmem = pmem.split(5 * ZGranuleSize);
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  EXPECT_EQ(split2_pmem.nsegments(), 1u);
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  EXPECT_EQ(       pmem.nsegments(), 1u);
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  EXPECT_EQ(split2_pmem.size(), 5 * ZGranuleSize);
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  EXPECT_EQ(       pmem.size(), 0 * ZGranuleSize);
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}
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#endif