提交 cff995d8 编写于 作者: T tschatzl

8014078: G1: improve remembered set summary information by providing per region type information

Summary: Add memory consumption breakdown on a per region type in the G1 remembered set summary statistics. This simplifies remembered set memory consumption analysis.
Reviewed-by: brutisso
上级 259f62c7
......@@ -3681,6 +3681,11 @@ void G1CollectedHeap::gc_prologue(bool full /* Ignored */) {
assert(InlineCacheBuffer::is_empty(), "should have cleaned up ICBuffer");
// Fill TLAB's and such
ensure_parsability(true);
if (G1SummarizeRSetStats && (G1SummarizeRSetStatsPeriod > 0) &&
(total_collections() % G1SummarizeRSetStatsPeriod == 0)) {
g1_rem_set()->print_periodic_summary_info("Before GC RS summary");
}
}
void G1CollectedHeap::gc_epilogue(bool full /* Ignored */) {
......@@ -3689,7 +3694,7 @@ void G1CollectedHeap::gc_epilogue(bool full /* Ignored */) {
(G1SummarizeRSetStatsPeriod > 0) &&
// we are at the end of the GC. Total collections has already been increased.
((total_collections() - 1) % G1SummarizeRSetStatsPeriod == 0)) {
g1_rem_set()->print_periodic_summary_info();
g1_rem_set()->print_periodic_summary_info("After GC RS summary");
}
// FIXME: what is this about?
......
......@@ -731,12 +731,12 @@ bool G1RemSet::refine_card(jbyte* card_ptr, int worker_i,
return has_refs_into_cset;
}
void G1RemSet::print_periodic_summary_info() {
void G1RemSet::print_periodic_summary_info(const char* header) {
G1RemSetSummary current;
current.initialize(this, n_workers());
_prev_period_summary.subtract_from(&current);
print_summary_info(&_prev_period_summary);
print_summary_info(&_prev_period_summary, header);
_prev_period_summary.set(&current);
}
......
......@@ -145,7 +145,7 @@ public:
virtual void print_summary_info();
// Print accumulated summary info from the last time called.
virtual void print_periodic_summary_info();
virtual void print_periodic_summary_info(const char* header);
// Prepare remembered set for verification.
virtual void prepare_for_verify();
......
......@@ -125,25 +125,115 @@ void G1RemSetSummary::subtract_from(G1RemSetSummary* other) {
_sampling_thread_vtime = other->sampling_thread_vtime() - _sampling_thread_vtime;
}
static double percent_of(size_t numerator, size_t denominator) {
if (denominator != 0) {
return (double)numerator / denominator * 100.0f;
} else {
return 0.0f;
}
}
static size_t round_to_K(size_t value) {
return value / K;
}
class RegionTypeCounter VALUE_OBJ_CLASS_SPEC {
private:
const char* _name;
size_t _rs_mem_size;
size_t _cards_occupied;
size_t _amount;
size_t _code_root_mem_size;
size_t _code_root_elems;
double rs_mem_size_percent_of(size_t total) {
return percent_of(_rs_mem_size, total);
}
double cards_occupied_percent_of(size_t total) {
return percent_of(_cards_occupied, total);
}
double code_root_mem_size_percent_of(size_t total) {
return percent_of(_code_root_mem_size, total);
}
double code_root_elems_percent_of(size_t total) {
return percent_of(_code_root_elems, total);
}
size_t amount() const { return _amount; }
public:
RegionTypeCounter(const char* name) : _name(name), _rs_mem_size(0), _cards_occupied(0),
_amount(0), _code_root_mem_size(0), _code_root_elems(0) { }
void add(size_t rs_mem_size, size_t cards_occupied, size_t code_root_mem_size,
size_t code_root_elems) {
_rs_mem_size += rs_mem_size;
_cards_occupied += cards_occupied;
_code_root_mem_size += code_root_mem_size;
_code_root_elems += code_root_elems;
_amount++;
}
size_t rs_mem_size() const { return _rs_mem_size; }
size_t cards_occupied() const { return _cards_occupied; }
size_t code_root_mem_size() const { return _code_root_mem_size; }
size_t code_root_elems() const { return _code_root_elems; }
void print_rs_mem_info_on(outputStream * out, size_t total) {
out->print_cr(" %8dK (%5.1f%%) by %zd %s regions", round_to_K(rs_mem_size()), rs_mem_size_percent_of(total), amount(), _name);
}
void print_cards_occupied_info_on(outputStream * out, size_t total) {
out->print_cr(" %8d (%5.1f%%) entries by %zd %s regions", cards_occupied(), cards_occupied_percent_of(total), amount(), _name);
}
void print_code_root_mem_info_on(outputStream * out, size_t total) {
out->print_cr(" %8dK (%5.1f%%) by %zd %s regions", round_to_K(code_root_mem_size()), code_root_mem_size_percent_of(total), amount(), _name);
}
void print_code_root_elems_info_on(outputStream * out, size_t total) {
out->print_cr(" %8d (%5.1f%%) elements by %zd %s regions", code_root_elems(), code_root_elems_percent_of(total), amount(), _name);
}
};
class HRRSStatsIter: public HeapRegionClosure {
size_t _occupied;
private:
RegionTypeCounter _young;
RegionTypeCounter _humonguous;
RegionTypeCounter _free;
RegionTypeCounter _old;
RegionTypeCounter _all;
size_t _total_rs_mem_sz;
size_t _max_rs_mem_sz;
HeapRegion* _max_rs_mem_sz_region;
size_t _total_code_root_mem_sz;
size_t total_rs_mem_sz() const { return _all.rs_mem_size(); }
size_t total_cards_occupied() const { return _all.cards_occupied(); }
size_t max_rs_mem_sz() const { return _max_rs_mem_sz; }
HeapRegion* max_rs_mem_sz_region() const { return _max_rs_mem_sz_region; }
size_t _max_code_root_mem_sz;
HeapRegion* _max_code_root_mem_sz_region;
size_t total_code_root_mem_sz() const { return _all.code_root_mem_size(); }
size_t total_code_root_elems() const { return _all.code_root_elems(); }
size_t max_code_root_mem_sz() const { return _max_code_root_mem_sz; }
HeapRegion* max_code_root_mem_sz_region() const { return _max_code_root_mem_sz_region; }
public:
HRRSStatsIter() :
_occupied(0),
_total_rs_mem_sz(0),
_max_rs_mem_sz(0),
_max_rs_mem_sz_region(NULL),
_total_code_root_mem_sz(0),
_max_code_root_mem_sz(0),
_max_code_root_mem_sz_region(NULL)
HRRSStatsIter() : _all("All"), _young("Young"), _humonguous("Humonguous"),
_free("Free"), _old("Old"), _max_code_root_mem_sz_region(NULL), _max_rs_mem_sz_region(NULL),
_max_rs_mem_sz(0), _max_code_root_mem_sz(0)
{}
bool doHeapRegion(HeapRegion* r) {
......@@ -156,46 +246,95 @@ public:
_max_rs_mem_sz = rs_mem_sz;
_max_rs_mem_sz_region = r;
}
_total_rs_mem_sz += rs_mem_sz;
size_t occupied_cards = hrrs->occupied();
size_t code_root_mem_sz = hrrs->strong_code_roots_mem_size();
if (code_root_mem_sz > _max_code_root_mem_sz) {
_max_code_root_mem_sz = code_root_mem_sz;
if (code_root_mem_sz > max_code_root_mem_sz()) {
_max_code_root_mem_sz_region = r;
}
_total_code_root_mem_sz += code_root_mem_sz;
size_t code_root_elems = hrrs->strong_code_roots_list_length();
RegionTypeCounter* current = NULL;
if (r->is_young()) {
current = &_young;
} else if (r->isHumongous()) {
current = &_humonguous;
} else if (r->is_empty()) {
current = &_free;
} else {
current = &_old;
}
current->add(rs_mem_sz, occupied_cards, code_root_mem_sz, code_root_elems);
_all.add(rs_mem_sz, occupied_cards, code_root_mem_sz, code_root_elems);
size_t occ = hrrs->occupied();
_occupied += occ;
return false;
}
size_t total_rs_mem_sz() { return _total_rs_mem_sz; }
size_t max_rs_mem_sz() { return _max_rs_mem_sz; }
HeapRegion* max_rs_mem_sz_region() { return _max_rs_mem_sz_region; }
size_t total_code_root_mem_sz() { return _total_code_root_mem_sz; }
size_t max_code_root_mem_sz() { return _max_code_root_mem_sz; }
HeapRegion* max_code_root_mem_sz_region() { return _max_code_root_mem_sz_region; }
size_t occupied() { return _occupied; }
};
double calc_percentage(size_t numerator, size_t denominator) {
if (denominator != 0) {
return (double)numerator / denominator * 100.0;
} else {
return 0.0f;
void print_summary_on(outputStream* out) {
RegionTypeCounter* counters[] = { &_young, &_humonguous, &_free, &_old, NULL };
out->print_cr("\n Current rem set statistics");
out->print_cr(" Total per region rem sets sizes = "SIZE_FORMAT"K."
" Max = "SIZE_FORMAT"K.",
round_to_K(total_rs_mem_sz()), round_to_K(max_rs_mem_sz()));
for (RegionTypeCounter** current = &counters[0]; *current != NULL; current++) {
(*current)->print_rs_mem_info_on(out, total_rs_mem_sz());
}
out->print_cr(" Static structures = "SIZE_FORMAT"K,"
" free_lists = "SIZE_FORMAT"K.",
round_to_K(HeapRegionRemSet::static_mem_size()),
round_to_K(HeapRegionRemSet::fl_mem_size()));
out->print_cr(" "SIZE_FORMAT" occupied cards represented.",
total_cards_occupied());
for (RegionTypeCounter** current = &counters[0]; *current != NULL; current++) {
(*current)->print_cards_occupied_info_on(out, total_cards_occupied());
}
// Largest sized rem set region statistics
HeapRegionRemSet* rem_set = max_rs_mem_sz_region()->rem_set();
out->print_cr(" Region with largest rem set = "HR_FORMAT", "
"size = "SIZE_FORMAT "K, occupied = "SIZE_FORMAT"K.",
HR_FORMAT_PARAMS(max_rs_mem_sz_region()),
round_to_K(rem_set->mem_size()),
round_to_K(rem_set->occupied()));
// Strong code root statistics
HeapRegionRemSet* max_code_root_rem_set = max_code_root_mem_sz_region()->rem_set();
out->print_cr(" Total heap region code root sets sizes = "SIZE_FORMAT"K."
" Max = "SIZE_FORMAT"K.",
round_to_K(total_code_root_mem_sz()),
round_to_K(max_code_root_rem_set->strong_code_roots_mem_size()));
for (RegionTypeCounter** current = &counters[0]; *current != NULL; current++) {
(*current)->print_code_root_mem_info_on(out, total_code_root_mem_sz());
}
out->print_cr(" "SIZE_FORMAT" code roots represented.",
total_code_root_elems());
for (RegionTypeCounter** current = &counters[0]; *current != NULL; current++) {
(*current)->print_code_root_elems_info_on(out, total_code_root_elems());
}
out->print_cr(" Region with largest amount of code roots = "HR_FORMAT", "
"size = "SIZE_FORMAT "K, num_elems = "SIZE_FORMAT".",
HR_FORMAT_PARAMS(max_code_root_mem_sz_region()),
round_to_K(max_code_root_rem_set->strong_code_roots_mem_size()),
round_to_K(max_code_root_rem_set->strong_code_roots_list_length()));
}
}
};
void G1RemSetSummary::print_on(outputStream* out) {
out->print_cr("\n Concurrent RS processed "SIZE_FORMAT" cards",
out->print_cr("\n Recent concurrent refinement statistics");
out->print_cr(" Processed "SIZE_FORMAT" cards",
num_concurrent_refined_cards());
out->print_cr(" Of %d completed buffers:", num_processed_buf_total());
out->print_cr(" %8d (%5.1f%%) by concurrent RS threads.",
num_processed_buf_total(),
calc_percentage(num_processed_buf_rs_threads(), num_processed_buf_total()));
percent_of(num_processed_buf_rs_threads(), num_processed_buf_total()));
out->print_cr(" %8d (%5.1f%%) by mutator threads.",
num_processed_buf_mutator(),
calc_percentage(num_processed_buf_mutator(), num_processed_buf_total()));
percent_of(num_processed_buf_mutator(), num_processed_buf_total()));
out->print_cr(" Did %d coarsenings.", num_coarsenings());
out->print_cr(" Concurrent RS threads times (s)");
out->print(" ");
for (uint i = 0; i < _num_vtimes; i++) {
......@@ -207,33 +346,5 @@ void G1RemSetSummary::print_on(outputStream* out) {
HRRSStatsIter blk;
G1CollectedHeap::heap()->heap_region_iterate(&blk);
// RemSet stats
out->print_cr(" Total heap region rem set sizes = "SIZE_FORMAT"K."
" Max = "SIZE_FORMAT"K.",
blk.total_rs_mem_sz()/K, blk.max_rs_mem_sz()/K);
out->print_cr(" Static structures = "SIZE_FORMAT"K,"
" free_lists = "SIZE_FORMAT"K.",
HeapRegionRemSet::static_mem_size() / K,
HeapRegionRemSet::fl_mem_size() / K);
out->print_cr(" "SIZE_FORMAT" occupied cards represented.",
blk.occupied());
HeapRegion* max_rs_mem_sz_region = blk.max_rs_mem_sz_region();
HeapRegionRemSet* max_rs_rem_set = max_rs_mem_sz_region->rem_set();
out->print_cr(" Max size region = "HR_FORMAT", "
"size = "SIZE_FORMAT "K, occupied = "SIZE_FORMAT"K.",
HR_FORMAT_PARAMS(max_rs_mem_sz_region),
(max_rs_rem_set->mem_size() + K - 1)/K,
(max_rs_rem_set->occupied() + K - 1)/K);
out->print_cr(" Did %d coarsenings.", num_coarsenings());
// Strong code root stats
out->print_cr(" Total heap region code-root set sizes = "SIZE_FORMAT"K."
" Max = "SIZE_FORMAT"K.",
blk.total_code_root_mem_sz()/K, blk.max_code_root_mem_sz()/K);
HeapRegion* max_code_root_mem_sz_region = blk.max_code_root_mem_sz_region();
HeapRegionRemSet* max_code_root_rem_set = max_code_root_mem_sz_region->rem_set();
out->print_cr(" Max size region = "HR_FORMAT", "
"size = "SIZE_FORMAT "K, num_elems = "SIZE_FORMAT".",
HR_FORMAT_PARAMS(max_code_root_mem_sz_region),
(max_code_root_rem_set->strong_code_roots_mem_size() + K - 1)/K,
(max_code_root_rem_set->strong_code_roots_list_length()));
blk.print_summary_on(out);
}
......@@ -25,140 +25,61 @@
* @test TestSummarizeRSetStats.java
* @bug 8013895
* @library /testlibrary
* @build TestSummarizeRSetStats
* @build TestSummarizeRSetStatsTools TestSummarizeRSetStats
* @summary Verify output of -XX:+G1SummarizeRSetStats
* @run main TestSummarizeRSetStats
*
* Test the output of G1SummarizeRSetStats in conjunction with G1SummarizeRSetStatsPeriod.
*/
import com.oracle.java.testlibrary.*;
import java.lang.Thread;
import java.util.ArrayList;
import java.util.Arrays;
class RunSystemGCs {
// 4M size, both are directly allocated into the old gen
static Object[] largeObject1 = new Object[1024 * 1024];
static Object[] largeObject2 = new Object[1024 * 1024];
static int[] temp;
public static void main(String[] args) {
// create some cross-references between these objects
for (int i = 0; i < largeObject1.length; i++) {
largeObject1[i] = largeObject2;
}
for (int i = 0; i < largeObject2.length; i++) {
largeObject2[i] = largeObject1;
}
int numGCs = Integer.parseInt(args[0]);
if (numGCs > 0) {
// try to force a minor collection: the young gen is 4M, the
// amount of data allocated below is roughly that (4*1024*1024 +
// some header data)
for (int i = 0; i < 1024 ; i++) {
temp = new int[1024];
}
}
for (int i = 0; i < numGCs - 1; i++) {
System.gc();
}
}
}
public class TestSummarizeRSetStats {
public static String runTest(String[] additionalArgs, int numGCs) throws Exception {
ArrayList<String> finalargs = new ArrayList<String>();
String[] defaultArgs = new String[] {
"-XX:+UseG1GC",
"-Xmn4m",
"-Xmx20m",
"-XX:InitiatingHeapOccupancyPercent=100", // we don't want the additional GCs due to initial marking
"-XX:+PrintGC",
"-XX:+UnlockDiagnosticVMOptions",
"-XX:G1HeapRegionSize=1M",
};
finalargs.addAll(Arrays.asList(defaultArgs));
if (additionalArgs != null) {
finalargs.addAll(Arrays.asList(additionalArgs));
}
finalargs.add(RunSystemGCs.class.getName());
finalargs.add(String.valueOf(numGCs));
ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
finalargs.toArray(new String[0]));
OutputAnalyzer output = new OutputAnalyzer(pb.start());
output.shouldHaveExitValue(0);
String result = output.getStdout();
return result;
}
private static void expectStatistics(String result, int expectedCumulative, int expectedPeriodic) throws Exception {
int actualTotal = result.split("Concurrent RS processed").length - 1;
int actualCumulative = result.split("Cumulative RS summary").length - 1;
if (expectedCumulative != actualCumulative) {
throw new Exception("Incorrect amount of RSet summaries at the end. Expected " + expectedCumulative + ", got " + actualCumulative);
}
if (expectedPeriodic != (actualTotal - actualCumulative)) {
throw new Exception("Incorrect amount of per-period RSet summaries at the end. Expected " + expectedPeriodic + ", got " + (actualTotal - actualCumulative));
}
}
public static void main(String[] args) throws Exception {
String result;
// no RSet statistics output
result = runTest(null, 0);
expectStatistics(result, 0, 0);
if (!TestSummarizeRSetStatsTools.testingG1GC()) {
return;
}
// no remembered set summary output
result = TestSummarizeRSetStatsTools.runTest(null, 0);
TestSummarizeRSetStatsTools.expectRSetSummaries(result, 0, 0);
// no RSet statistics output
result = runTest(null, 2);
expectStatistics(result, 0, 0);
// no remembered set summary output
result = TestSummarizeRSetStatsTools.runTest(null, 2);
TestSummarizeRSetStatsTools.expectRSetSummaries(result, 0, 0);
// no RSet statistics output
result = runTest(new String[] { "-XX:G1SummarizeRSetStatsPeriod=1" }, 3);
expectStatistics(result, 0, 0);
// no remembered set summary output
result = TestSummarizeRSetStatsTools.runTest(new String[] { "-XX:G1SummarizeRSetStatsPeriod=1" }, 3);
TestSummarizeRSetStatsTools.expectRSetSummaries(result, 0, 0);
// single RSet statistics output at the end
result = runTest(new String[] { "-XX:+G1SummarizeRSetStats" }, 0);
expectStatistics(result, 1, 0);
// single remembered set summary output at the end
result = TestSummarizeRSetStatsTools.runTest(new String[] { "-XX:+G1SummarizeRSetStats" }, 0);
TestSummarizeRSetStatsTools.expectRSetSummaries(result, 1, 0);
// single RSet statistics output at the end
result = runTest(new String[] { "-XX:+G1SummarizeRSetStats" }, 2);
expectStatistics(result, 1, 0);
// single remembered set summary output at the end
result = TestSummarizeRSetStatsTools.runTest(new String[] { "-XX:+G1SummarizeRSetStats" }, 2);
TestSummarizeRSetStatsTools.expectRSetSummaries(result, 1, 0);
// single RSet statistics output
result = runTest(new String[] { "-XX:+G1SummarizeRSetStats", "-XX:G1SummarizeRSetStatsPeriod=1" }, 0);
expectStatistics(result, 1, 0);
// single remembered set summary output
result = TestSummarizeRSetStatsTools.runTest(new String[] { "-XX:+G1SummarizeRSetStats", "-XX:G1SummarizeRSetStatsPeriod=1" }, 0);
TestSummarizeRSetStatsTools.expectRSetSummaries(result, 1, 0);
// two times RSet statistics output
result = runTest(new String[] { "-XX:+G1SummarizeRSetStats", "-XX:G1SummarizeRSetStatsPeriod=1" }, 1);
expectStatistics(result, 1, 1);
// two times remembered set summary output
result = TestSummarizeRSetStatsTools.runTest(new String[] { "-XX:+G1SummarizeRSetStats", "-XX:G1SummarizeRSetStatsPeriod=1" }, 1);
TestSummarizeRSetStatsTools.expectRSetSummaries(result, 1, 2);
// four times RSet statistics output
result = runTest(new String[] { "-XX:+G1SummarizeRSetStats", "-XX:G1SummarizeRSetStatsPeriod=1" }, 3);
expectStatistics(result, 1, 3);
// four times remembered set summary output
result = TestSummarizeRSetStatsTools.runTest(new String[] { "-XX:+G1SummarizeRSetStats", "-XX:G1SummarizeRSetStatsPeriod=1" }, 3);
TestSummarizeRSetStatsTools.expectRSetSummaries(result, 1, 6);
// three times RSet statistics output
result = runTest(new String[] { "-XX:+G1SummarizeRSetStats", "-XX:G1SummarizeRSetStatsPeriod=2" }, 3);
expectStatistics(result, 1, 2);
// three times remembered set summary output
result = TestSummarizeRSetStatsTools.runTest(new String[] { "-XX:+G1SummarizeRSetStats", "-XX:G1SummarizeRSetStatsPeriod=2" }, 3);
TestSummarizeRSetStatsTools.expectRSetSummaries(result, 1, 4);
// single RSet statistics output
result = runTest(new String[] { "-XX:+G1SummarizeRSetStats", "-XX:G1SummarizeRSetStatsPeriod=100" }, 3);
expectStatistics(result, 1, 1);
// single remembered set summary output
result = TestSummarizeRSetStatsTools.runTest(new String[] { "-XX:+G1SummarizeRSetStats", "-XX:G1SummarizeRSetStatsPeriod=100" }, 3);
TestSummarizeRSetStatsTools.expectRSetSummaries(result, 1, 2);
}
}
/*
* Copyright (c) 2013, Oracle and/or its affiliates. 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.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/*
* @test TestSummarizeRSetStatsPerRegion.java
* @bug 8014078
* @library /testlibrary
* @build TestSummarizeRSetStatsTools TestSummarizeRSetStatsPerRegion
* @summary Verify output of -XX:+G1SummarizeRSetStats in regards to per-region type output
* @run main TestSummarizeRSetStatsPerRegion
*/
import com.oracle.java.testlibrary.*;
import java.lang.Thread;
import java.util.ArrayList;
import java.util.Arrays;
public class TestSummarizeRSetStatsPerRegion {
public static void main(String[] args) throws Exception {
String result;
if (!TestSummarizeRSetStatsTools.testingG1GC()) {
return;
}
// single remembered set summary output at the end
result = TestSummarizeRSetStatsTools.runTest(new String[] { "-XX:+G1SummarizeRSetStats" }, 0);
TestSummarizeRSetStatsTools.expectPerRegionRSetSummaries(result, 1, 0);
// two times remembered set summary output
result = TestSummarizeRSetStatsTools.runTest(new String[] { "-XX:+G1SummarizeRSetStats", "-XX:G1SummarizeRSetStatsPeriod=1" }, 1);
TestSummarizeRSetStatsTools.expectPerRegionRSetSummaries(result, 1, 2);
}
}
/*
* Copyright (c) 2013, Oracle and/or its affiliates. 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.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/*
* Common helpers for TestSummarizeRSetStats* tests
*/
import sun.management.ManagementFactoryHelper;
import com.sun.management.HotSpotDiagnosticMXBean;
import com.sun.management.VMOption;
import com.oracle.java.testlibrary.*;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.lang.Thread;
import java.util.ArrayList;
import java.util.Arrays;
class VerifySummaryOutput {
// 4M size, both are directly allocated into the old gen
static Object[] largeObject1 = new Object[1024 * 1024];
static Object[] largeObject2 = new Object[1024 * 1024];
static int[] temp;
public static void main(String[] args) {
// create some cross-references between these objects
for (int i = 0; i < largeObject1.length; i++) {
largeObject1[i] = largeObject2;
}
for (int i = 0; i < largeObject2.length; i++) {
largeObject2[i] = largeObject1;
}
int numGCs = Integer.parseInt(args[0]);
if (numGCs > 0) {
// try to force a minor collection: the young gen is 4M, the
// amount of data allocated below is roughly that (4*1024*1024 +
// some header data)
for (int i = 0; i < 1024 ; i++) {
temp = new int[1024];
}
}
for (int i = 0; i < numGCs - 1; i++) {
System.gc();
}
}
}
public class TestSummarizeRSetStatsTools {
// the VM is currently run using G1GC, i.e. trying to test G1 functionality.
public static boolean testingG1GC() {
HotSpotDiagnosticMXBean diagnostic = ManagementFactoryHelper.getDiagnosticMXBean();
VMOption option = diagnostic.getVMOption("UseG1GC");
if (option.getValue().equals("false")) {
System.out.println("Skipping this test. It is only a G1 test.");
return false;
}
return true;
}
public static String runTest(String[] additionalArgs, int numGCs) throws Exception {
ArrayList<String> finalargs = new ArrayList<String>();
String[] defaultArgs = new String[] {
"-XX:+UseG1GC",
"-XX:+UseCompressedOops",
"-Xmn4m",
"-Xmx20m",
"-XX:InitiatingHeapOccupancyPercent=100", // we don't want the additional GCs due to initial marking
"-XX:+PrintGC",
"-XX:+UnlockDiagnosticVMOptions",
"-XX:G1HeapRegionSize=1M",
};
finalargs.addAll(Arrays.asList(defaultArgs));
if (additionalArgs != null) {
finalargs.addAll(Arrays.asList(additionalArgs));
}
finalargs.add(VerifySummaryOutput.class.getName());
finalargs.add(String.valueOf(numGCs));
ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
finalargs.toArray(new String[0]));
OutputAnalyzer output = new OutputAnalyzer(pb.start());
output.shouldHaveExitValue(0);
String result = output.getStdout();
return result;
}
private static void checkCounts(int expected, int actual, String which) throws Exception {
if (expected != actual) {
throw new Exception("RSet summaries mention " + which + " regions an incorrect number of times. Expected " + expected + ", got " + actual);
}
}
public static void expectPerRegionRSetSummaries(String result, int expectedCumulative, int expectedPeriodic) throws Exception {
expectRSetSummaries(result, expectedCumulative, expectedPeriodic);
int actualYoung = result.split("Young regions").length - 1;
int actualHumonguous = result.split("Humonguous regions").length - 1;
int actualFree = result.split("Free regions").length - 1;
int actualOther = result.split("Old regions").length - 1;
// the strings we check for above are printed four times per summary
int expectedPerRegionTypeInfo = (expectedCumulative + expectedPeriodic) * 4;
checkCounts(expectedPerRegionTypeInfo, actualYoung, "Young");
checkCounts(expectedPerRegionTypeInfo, actualHumonguous, "Humonguous");
checkCounts(expectedPerRegionTypeInfo, actualFree, "Free");
checkCounts(expectedPerRegionTypeInfo, actualOther, "Old");
}
public static void expectRSetSummaries(String result, int expectedCumulative, int expectedPeriodic) throws Exception {
int actualTotal = result.split("concurrent refinement").length - 1;
int actualCumulative = result.split("Cumulative RS summary").length - 1;
if (expectedCumulative != actualCumulative) {
throw new Exception("Incorrect amount of RSet summaries at the end. Expected " + expectedCumulative + ", got " + actualCumulative);
}
if (expectedPeriodic != (actualTotal - actualCumulative)) {
throw new Exception("Incorrect amount of per-period RSet summaries at the end. Expected " + expectedPeriodic + ", got " + (actualTotal - actualCumulative));
}
}
}
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