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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) 2018 Red Hat, Inc.
*
* 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 "rgw/rgw_aio_throttle.h"
#include "rgw/rgw_rados.h"
#include "include/rados/librados.hpp"
#include <gtest/gtest.h>
struct RadosEnv : public ::testing::Environment {
public:
static constexpr auto poolname = "ceph_test_rgw_throttle";
static std::optional<RGWSI_RADOS> rados;
void SetUp() override {
rados.emplace(g_ceph_context);
ASSERT_EQ(0, rados->start());
int r = rados->pool({poolname}).create();
if (r == -EEXIST)
r = 0;
ASSERT_EQ(0, r);
}
void TearDown() {
rados.reset();
}
};
std::optional<RGWSI_RADOS> RadosEnv::rados;
auto *const rados_env = ::testing::AddGlobalTestEnvironment(new RadosEnv);
// test fixture for global setup/teardown
class RadosFixture : public ::testing::Test {
protected:
RGWSI_RADOS::Obj make_obj(const std::string& oid) {
auto obj = RadosEnv::rados->obj({{RadosEnv::poolname}, oid});
ceph_assert_always(0 == obj.open());
return obj;
}
};
using Aio_Throttle = RadosFixture;
namespace rgw {
TEST_F(Aio_Throttle, NoThrottleUpToMax)
{
AioThrottle throttle(4);
auto obj = make_obj(__PRETTY_FUNCTION__);
{
librados::ObjectWriteOperation op1;
auto c1 = throttle.submit(obj, &op1, 1, 0);
EXPECT_TRUE(c1.empty());
librados::ObjectWriteOperation op2;
auto c2 = throttle.submit(obj, &op2, 1, 0);
EXPECT_TRUE(c2.empty());
librados::ObjectWriteOperation op3;
auto c3 = throttle.submit(obj, &op3, 1, 0);
EXPECT_TRUE(c3.empty());
librados::ObjectWriteOperation op4;
auto c4 = throttle.submit(obj, &op4, 1, 0);
EXPECT_TRUE(c4.empty());
// no completions because no ops had to wait
auto c5 = throttle.poll();
}
auto completions = throttle.drain();
ASSERT_EQ(4u, completions.size());
for (auto& c : completions) {
EXPECT_EQ(-EINVAL, c.result);
}
}
TEST_F(Aio_Throttle, CostOverWindow)
{
AioThrottle throttle(4);
auto obj = make_obj(__PRETTY_FUNCTION__);
librados::ObjectWriteOperation op;
auto c = throttle.submit(obj, &op, 8, 0);
ASSERT_EQ(1u, c.size());
EXPECT_EQ(-EDEADLK, c.front().result);
}
TEST_F(Aio_Throttle, ThrottleOverMax)
{
constexpr uint64_t window = 4;
AioThrottle throttle(window);
auto obj = make_obj(__PRETTY_FUNCTION__);
// issue 32 writes, and verify that max_outstanding <= window
constexpr uint64_t total = 32;
uint64_t max_outstanding = 0;
uint64_t outstanding = 0;
for (uint64_t i = 0; i < total; i++) {
librados::ObjectWriteOperation op;
auto c = throttle.submit(obj, &op, 1, 0);
outstanding++;
outstanding -= c.size();
if (max_outstanding < outstanding) {
max_outstanding = outstanding;
}
}
auto c = throttle.drain();
outstanding -= c.size();
EXPECT_EQ(0u, outstanding);
EXPECT_EQ(window, max_outstanding);
}
} // namespace rgw
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