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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
/*
* Ceph - scalable distributed file system
*
* Copyright (C) 2016 XSky <haomai@xsky.com>
*
* Author: Haomai Wang <haomaiwang@gmail.com>
*
* This is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1, as published by the Free Software
* Foundation. See file COPYING.
*
*/
#include <map>
#include <random>
#include <gtest/gtest.h>
#include "msg/async/dpdk/UserspaceEvent.h"
#include "global/global_context.h"
class UserspaceManagerTest : public ::testing::Test {
public:
UserspaceEventManager *manager;
UserspaceManagerTest() {}
virtual void SetUp() {
manager = new UserspaceEventManager(g_ceph_context);
}
virtual void TearDown() {
delete manager;
}
};
TEST_F(UserspaceManagerTest, BasicTest) {
int events[10];
int masks[10];
int fd = manager->get_eventfd();
ASSERT_EQ(fd, 1);
ASSERT_EQ(0, manager->listen(fd, 1));
ASSERT_EQ(0, manager->notify(fd, 1));
ASSERT_EQ(1, manager->poll(events, masks, 10, nullptr));
ASSERT_EQ(fd, events[0]);
ASSERT_EQ(1, masks[0]);
ASSERT_EQ(0, manager->notify(fd, 2));
ASSERT_EQ(0, manager->poll(events, masks, 10, nullptr));
ASSERT_EQ(0, manager->unlisten(fd, 1));
ASSERT_EQ(0, manager->notify(fd, 1));
ASSERT_EQ(0, manager->poll(events, masks, 10, nullptr));
manager->close(fd);
fd = manager->get_eventfd();
ASSERT_EQ(fd, 1);
ASSERT_EQ(0, manager->poll(events, masks, 10, nullptr));
}
TEST_F(UserspaceManagerTest, FailTest) {
int events[10];
int masks[10];
int fd = manager->get_eventfd();
ASSERT_EQ(fd, 1);
ASSERT_EQ(-ENOENT, manager->listen(fd+1, 1));
ASSERT_EQ(-ENOENT, manager->notify(fd+1, 1));
ASSERT_EQ(0, manager->poll(events, masks, 10, nullptr));
ASSERT_EQ(-ENOENT, manager->unlisten(fd+1, 1));
manager->close(fd);
}
TEST_F(UserspaceManagerTest, StressTest) {
std::vector<std::pair<int, int> > mappings;
int events[10];
int masks[10];
std::random_device rd;
std::default_random_engine rng(rd());
std::uniform_int_distribution<> dist(0, 100);
mappings.resize(1001);
mappings[0] = std::make_pair(-1, -1);
for (int i = 0; i < 1000; ++i) {
int fd = manager->get_eventfd();
ASSERT_TRUE(fd > 0);
mappings[fd] = std::make_pair(0, 0);
}
int r = 0;
int fd = manager->get_eventfd();
auto get_activate_count = [](std::vector<std::pair<int, int> > &m) {
std::vector<int> fds;
int mask = 0;
size_t idx = 0;
for (auto &&p : m) {
mask = p.first & p.second;
if (p.first != -1 && mask) {
p.second &= (~mask);
fds.push_back(idx);
std::cerr << " activate " << idx << " mask " << mask << std::endl;
}
++idx;
}
return fds;
};
for (int i = 0; i < 10000; ++i) {
int value = dist(rng);
fd = dist(rng) % mappings.size();
auto &p = mappings[fd];
int mask = dist(rng) % 2 + 1;
if (value > 55) {
r = manager->notify(fd, mask);
if (p.first == -1) {
ASSERT_EQ(p.second, -1);
ASSERT_EQ(r, -ENOENT);
} else {
p.second |= mask;
ASSERT_EQ(r, 0);
}
std::cerr << " notify fd " << fd << " mask " << mask << " r " << r << std::endl;
} else if (value > 45) {
r = manager->listen(fd, mask);
std::cerr << " listen fd " << fd << " mask " << mask << " r " << r << std::endl;
if (p.first == -1) {
ASSERT_EQ(p.second, -1);
ASSERT_EQ(r, -ENOENT);
} else {
p.first |= mask;
ASSERT_EQ(r, 0);
}
} else if (value > 35) {
r = manager->unlisten(fd, mask);
std::cerr << " unlisten fd " << fd << " mask " << mask << " r " << r << std::endl;
if (p.first == -1) {
ASSERT_EQ(p.second, -1);
ASSERT_EQ(r, -ENOENT);
} else {
p.first &= ~mask;
ASSERT_EQ(r, 0);
}
} else if (value > 20) {
std::set<int> actual, expected;
do {
r = manager->poll(events, masks, 3, nullptr);
std::cerr << " poll " << r;
for (int k = 0; k < r; ++k) {
std::cerr << events[k] << " ";
actual.insert(events[k]);
}
} while (r == 3);
std::cerr << std::endl;
auto fds = get_activate_count(mappings);
for (auto &&d : fds)
expected.insert(d);
ASSERT_EQ(expected, actual);
} else if (value > 10) {
r = manager->get_eventfd();
std::cerr << " open fd " << r << std::endl;
ASSERT_TRUE(r > 0);
if ((size_t)r >= mappings.size())
mappings.resize(r+1);
mappings[r] = std::make_pair(0, 0);
} else {
manager->close(fd);
std::cerr << " close fd " << fd << std::endl;
mappings[fd] = std::make_pair(-1, -1);
}
ASSERT_TRUE(manager->check());
}
}
/*
* Local Variables:
* compile-command: "cd ../.. ; make ceph_test_userspace_event &&
* ./ceph_test_userspace_event.cc
*
* End:
*/
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