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// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include <vespa/memfilepersistence/device/partitionmonitor.h>
#include <vespa/vespalib/testkit/testapp.h>
#include <vespa/vdstestlib/cppunit/macros.h>
namespace storage {
namespace memfile {
struct PartitionMonitorTest : public CppUnit::TestFixture
{
void testNormalUsage();
void testHighInodeFillrate();
void testAlwaysStatPolicy();
void testPeriodPolicy();
void testStatOncePolicy();
void testDynamicPolicy();
void testIsFull();
CPPUNIT_TEST_SUITE(PartitionMonitorTest);
CPPUNIT_TEST(testNormalUsage);
CPPUNIT_TEST(testHighInodeFillrate);
CPPUNIT_TEST(testAlwaysStatPolicy);
CPPUNIT_TEST(testPeriodPolicy);
CPPUNIT_TEST(testStatOncePolicy);
CPPUNIT_TEST(testDynamicPolicy);
CPPUNIT_TEST(testIsFull);
CPPUNIT_TEST_SUITE_END();
};
CPPUNIT_TEST_SUITE_REGISTRATION(PartitionMonitorTest);
struct FakeStatter : public PartitionMonitor::Statter {
struct statvfs _info;
FakeStatter() {
_info.f_bsize = 4096;
_info.f_frsize = 4096;
_info.f_blocks = 1000;
_info.f_bfree = 500;
_info.f_bavail = 400;
_info.f_files = 64;
_info.f_ffree = 32;
_info.f_favail = 30;
_info.f_fsid = 13;
_info.f_namemax = 256;
}
void removeData(uint32_t size) {
_info.f_bavail += (size / _info.f_bsize);
_info.f_bfree += (size / _info.f_bsize);
}
void addData(uint32_t size) {
_info.f_bavail -= (size / _info.f_bsize);
_info.f_bfree -= (size / _info.f_bsize);
}
void statFileSystem(const std::string&, struct statvfs& info) override {
info = _info;
}
};
void PartitionMonitorTest::testNormalUsage()
{
const std::string file_name = TEST_PATH("testrunner.cpp");
PartitionMonitor monitor(file_name);
FakeStatter* statter = new FakeStatter();
monitor.setStatter(std::unique_ptr<PartitionMonitor::Statter>(statter));
std::string expected(
"PartitionMonitor(" + file_name + ", STAT_PERIOD(100), "
"2048000/3686400 used - 55.5556 % full)");
CPPUNIT_ASSERT_EQUAL(expected, monitor.toString(false));
expected =
"PartitionMonitor(" + file_name + ") {\n"
" Fill rate: 55.5556 %\n"
" Inode fill rate: 51.6129 %\n"
" Detected block size: 4096\n"
" File system id: 13\n"
" Total size: 3686400 (3600 kB)\n"
" Used size: 2048000 (2000 kB)\n"
" Queries since last stat: 0\n"
" Monitor policy: STAT_PERIOD(100)\n"
" Root only ratio 0\n"
" Max fill rate 98 %\n"
"}";
CPPUNIT_ASSERT_EQUAL(expected, monitor.toString(true));
CPPUNIT_ASSERT(monitor.getFillRate() > 0.55);
}
void PartitionMonitorTest::testHighInodeFillrate()
{
const std::string file_name = TEST_PATH("testrunner.cpp");
PartitionMonitor monitor(file_name);
FakeStatter* statter = new FakeStatter();
statter->_info.f_favail = 2;
monitor.setStatter(std::unique_ptr<PartitionMonitor::Statter>(statter));
std::string expected(
"PartitionMonitor(" + file_name + ", STAT_PERIOD(100), "
"2048000/3686400 used - 94.1176 % full (inodes))");
CPPUNIT_ASSERT_EQUAL(expected, monitor.toString(false));
expected =
"PartitionMonitor(" + file_name + ") {\n"
" Fill rate: 55.5556 %\n"
" Inode fill rate: 94.1176 %\n"
" Detected block size: 4096\n"
" File system id: 13\n"
" Total size: 3686400 (3600 kB)\n"
" Used size: 2048000 (2000 kB)\n"
" Queries since last stat: 0\n"
" Monitor policy: STAT_PERIOD(100)\n"
" Root only ratio 0\n"
" Max fill rate 98 %\n"
"}";
CPPUNIT_ASSERT_EQUAL(expected, monitor.toString(true));
CPPUNIT_ASSERT(monitor.getFillRate() > 0.94);
}
void PartitionMonitorTest::testAlwaysStatPolicy()
{
PartitionMonitor monitor(TEST_PATH("testrunner.cpp"));
FakeStatter* statter = new FakeStatter();
monitor.setStatter(std::unique_ptr<PartitionMonitor::Statter>(statter));
monitor.setAlwaysStatPolicy();
for (uint32_t i=0; i<10; ++i) {
monitor.getFillRate();
CPPUNIT_ASSERT_EQUAL(0u, monitor._queriesSinceStat);
}
}
void PartitionMonitorTest::testPeriodPolicy()
{
PartitionMonitor monitor(TEST_PATH("testrunner.cpp"));
FakeStatter* statter = new FakeStatter();
monitor.setStatter(std::unique_ptr<PartitionMonitor::Statter>(statter));
monitor.setStatPeriodPolicy(4);
for (uint32_t i=1; i<16; ++i) {
monitor.getFillRate();
CPPUNIT_ASSERT_EQUAL(i % 4, monitor._queriesSinceStat);
}
}
void PartitionMonitorTest::testStatOncePolicy()
{
PartitionMonitor monitor(TEST_PATH("testrunner.cpp"));
FakeStatter* statter = new FakeStatter();
monitor.setStatter(std::unique_ptr<PartitionMonitor::Statter>(statter));
monitor.setStatOncePolicy();
for (uint32_t i=1; i<16; ++i) {
monitor.getFillRate();
CPPUNIT_ASSERT_EQUAL(i, monitor._queriesSinceStat);
}
}
void PartitionMonitorTest::testDynamicPolicy()
{
PartitionMonitor monitor(TEST_PATH("testrunner.cpp"));
FakeStatter* statter = new FakeStatter();
monitor.setStatter(std::unique_ptr<PartitionMonitor::Statter>(statter));
monitor.setStatDynamicPolicy(2);
// Add some data, such that we see that period goes down
CPPUNIT_ASSERT_EQUAL(uint64_t(3698), monitor.calcDynamicPeriod());
CPPUNIT_ASSERT_EQUAL(55, (int) (100 * monitor.getFillRate()));
monitor.addingData(256 * 1024);
CPPUNIT_ASSERT_EQUAL(uint64_t(2592), monitor.calcDynamicPeriod());
CPPUNIT_ASSERT_EQUAL(62, (int) (100 * monitor.getFillRate()));
monitor.addingData(512 * 1024);
CPPUNIT_ASSERT_EQUAL(uint64_t(968), monitor.calcDynamicPeriod());
CPPUNIT_ASSERT_EQUAL(76, (int) (100 * monitor.getFillRate()));
// Add such that we hint that we have more data than possible on disk
monitor.addingData(1024 * 1024);
// Let fake stat just have a bit more data than before
statter->addData(256 * 1024);
// With high fill rate, we should check stat each time
CPPUNIT_ASSERT_EQUAL(uint64_t(1), monitor.calcDynamicPeriod());
// As period is 1, we will now do a new stat, it should find we
// actually have less fill rate
CPPUNIT_ASSERT_EQUAL(62, (int) (100 * monitor.getFillRate()));
}
void PartitionMonitorTest::testIsFull()
{
PartitionMonitor monitor(TEST_PATH("testrunner.cpp"));
monitor.setMaxFillness(0.85);
FakeStatter* statter = new FakeStatter();
monitor.setStatOncePolicy();
monitor.setStatter(std::unique_ptr<PartitionMonitor::Statter>(statter));
CPPUNIT_ASSERT_EQUAL(55, (int) (100 * monitor.getFillRate()));
CPPUNIT_ASSERT(!monitor.isFull());
monitor.addingData(512 * 1024);
CPPUNIT_ASSERT_EQUAL(69, (int) (100 * monitor.getFillRate()));
CPPUNIT_ASSERT(!monitor.isFull());
monitor.addingData(600 * 1024);
CPPUNIT_ASSERT_EQUAL(86, (int) (100 * monitor.getFillRate()));
CPPUNIT_ASSERT(monitor.isFull());
monitor.removingData(32 * 1024);
CPPUNIT_ASSERT_EQUAL(85, (int) (100 * monitor.getFillRate()));
CPPUNIT_ASSERT(monitor.isFull());
monitor.removingData(32 * 1024);
CPPUNIT_ASSERT_EQUAL(84, (int) (100 * monitor.getFillRate()));
CPPUNIT_ASSERT(!monitor.isFull());
}
}
} // storage
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