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// @file mmaptests.cpp
/**
* Copyright (C) 2008 10gen Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* This program 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the GNU Affero General Public License in all respects
* for all of the code used other than as permitted herein. If you modify
* file(s) with this exception, you may extend this exception to your
* version of the file(s), but you are not obligated to do so. If you do not
* wish to do so, delete this exception statement from your version. If you
* delete this exception statement from all source files in the program,
* then also delete it in the license file.
*/
#include "mongo/pch.h"
#include <boost/filesystem/operations.hpp>
#include "mongo/db/storage/durable_mapped_file.h"
#include "mongo/util/timer.h"
#include "mongo/dbtests/dbtests.h"
namespace MMapTests {
class LeakTest {
const string fn;
const int optOld;
public:
LeakTest() :
fn((boost::filesystem::path(storageGlobalParams.dbpath) / "testfile.map").string()),
optOld(storageGlobalParams.durOptions)
{
storageGlobalParams.durOptions = 0; // DurParanoid doesn't make sense with this test
}
~LeakTest() {
storageGlobalParams.durOptions = optOld;
try { boost::filesystem::remove(fn); }
catch(...) { }
}
void run() {
try { boost::filesystem::remove(fn); }
catch(...) { }
Lock::GlobalWrite lk;
{
DurableMappedFile f;
unsigned long long len = 256 * 1024 * 1024;
verify( f.create(fn, len, /*sequential*/false) );
{
char *p = (char *) f.getView();
verify(p);
// write something to the private view as a test
if (storageGlobalParams.dur)
MemoryMappedFile::makeWritable(p, 6);
strcpy(p, "hello");
}
if (storageGlobalParams.dur) {
char *w = (char *) f.view_write();
strcpy(w + 6, "world");
}
MongoFileFinder ff;
ASSERT( ff.findByPath(fn) );
ASSERT( ff.findByPath("asdf") == 0 );
}
{
MongoFileFinder ff;
ASSERT( ff.findByPath(fn) == 0 );
}
int N = 10000;
#if !defined(_WIN32) && !defined(__linux__)
// seems this test is slow on OS X.
N = 100;
#endif
// we make a lot here -- if we were leaking, presumably it would fail doing this many.
Timer t;
for( int i = 0; i < N; i++ ) {
DurableMappedFile f;
verify( f.open(fn, i%4==1) );
{
char *p = (char *) f.getView();
verify(p);
if (storageGlobalParams.dur)
MemoryMappedFile::makeWritable(p, 4);
strcpy(p, "zzz");
}
if (storageGlobalParams.dur) {
char *w = (char *) f.view_write();
if( i % 2 == 0 )
++(*w);
verify( w[6] == 'w' );
}
}
if( t.millis() > 10000 ) {
mongo::unittest::log() << "warning: MMap LeakTest is unusually slow N:" << N <<
' ' << t.millis() << "ms" << endl;
}
}
};
class All : public Suite {
public:
All() : Suite( "mmap" ) {}
void setupTests() {
add< LeakTest >();
}
} myall;
#if 0
class CopyOnWriteSpeedTest {
public:
void run() {
string fn = "/tmp/testfile.map";
boost::filesystem::remove(fn);
MemoryMappedFile f;
char *p = (char *) f.create(fn, 1024 * 1024 * 1024, true);
verify(p);
strcpy(p, "hello");
{
void *x = f.testGetCopyOnWriteView();
Timer tt;
for( int i = 11; i < 1000000000; i++ )
p[i] = 'z';
cout << "fill 1GB time: " << tt.millis() << "ms" << endl;
f.testCloseCopyOnWriteView(x);
}
/* test a lot of view/unviews */
{
Timer t;
char *q;
for( int i = 0; i < 1000; i++ ) {
q = (char *) f.testGetCopyOnWriteView();
verify( q );
if( i == 999 ) {
strcpy(q+2, "there");
}
f.testCloseCopyOnWriteView(q);
}
cout << "view unview: " << t.millis() << "ms" << endl;
}
f.flush(true);
/* plain old mmaped writes */
{
Timer t;
for( int i = 0; i < 10; i++ ) {
memset(p+100, 'c', 200 * 1024 * 1024);
}
cout << "traditional writes: " << t.millis() << "ms" << endl;
}
f.flush(true);
/* test doing some writes */
{
Timer t;
char *q = (char *) f.testGetCopyOnWriteView();
for( int i = 0; i < 10; i++ ) {
verify( q );
memset(q+100, 'c', 200 * 1024 * 1024);
}
f.testCloseCopyOnWriteView(q);
cout << "inc style some writes: " << t.millis() << "ms" << endl;
}
/* test doing some writes */
{
Timer t;
for( int i = 0; i < 10; i++ ) {
char *q = (char *) f.testGetCopyOnWriteView();
verify( q );
memset(q+100, 'c', 200 * 1024 * 1024);
f.testCloseCopyOnWriteView(q);
}
cout << "some writes: " << t.millis() << "ms" << endl;
}
/* more granular */
{
Timer t;
for( int i = 0; i < 100; i++ ) {
char *q = (char *) f.testGetCopyOnWriteView();
verify( q );
memset(q+100, 'c', 20 * 1024 * 1024);
f.testCloseCopyOnWriteView(q);
}
cout << "more granular some writes: " << t.millis() << "ms" << endl;
}
p[10] = 0;
cout << p << endl;
}
};
class All : public Suite {
public:
All() : Suite( "mmap" ) {}
void setupTests() {
add< CopyOnWriteSpeedTest >();
}
} myall;
#endif
}
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