mirror of https://github.com/facebook/rocksdb.git
101 lines
3.2 KiB
C++
101 lines
3.2 KiB
C++
// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
|
|
// This source code is licensed under the BSD-style license found in the
|
|
// LICENSE file in the root directory of this source tree. An additional grant
|
|
// of patent rights can be found in the PATENTS file in the same directory.
|
|
//
|
|
// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style license that can be
|
|
// found in the LICENSE file. See the AUTHORS file for names of contributors.
|
|
|
|
#ifndef __STDC_FORMAT_MACROS
|
|
#define __STDC_FORMAT_MACROS
|
|
#endif
|
|
|
|
#include <inttypes.h>
|
|
#include <limits>
|
|
#include "util/testharness.h"
|
|
#include "util/rate_limiter.h"
|
|
#include "util/random.h"
|
|
#include "rocksdb/env.h"
|
|
|
|
namespace rocksdb {
|
|
|
|
class RateLimiterTest : public testing::Test {};
|
|
|
|
TEST_F(RateLimiterTest, OverflowRate) {
|
|
GenericRateLimiter limiter(port::kMaxInt64, 1000, 10);
|
|
ASSERT_GT(limiter.GetSingleBurstBytes(), 1000000000ll);
|
|
}
|
|
|
|
TEST_F(RateLimiterTest, StartStop) {
|
|
std::unique_ptr<RateLimiter> limiter(new GenericRateLimiter(100, 100, 10));
|
|
}
|
|
|
|
TEST_F(RateLimiterTest, Rate) {
|
|
auto* env = Env::Default();
|
|
struct Arg {
|
|
Arg(int32_t _target_rate, int _burst)
|
|
: limiter(new GenericRateLimiter(_target_rate, 100 * 1000, 10)),
|
|
request_size(_target_rate / 10),
|
|
burst(_burst) {}
|
|
std::unique_ptr<RateLimiter> limiter;
|
|
int32_t request_size;
|
|
int burst;
|
|
};
|
|
|
|
auto writer = [](void* p) {
|
|
auto* thread_env = Env::Default();
|
|
auto* arg = static_cast<Arg*>(p);
|
|
// Test for 2 seconds
|
|
auto until = thread_env->NowMicros() + 2 * 1000000;
|
|
Random r((uint32_t)(thread_env->NowNanos() %
|
|
std::numeric_limits<uint32_t>::max()));
|
|
while (thread_env->NowMicros() < until) {
|
|
for (int i = 0; i < static_cast<int>(r.Skewed(arg->burst) + 1); ++i) {
|
|
arg->limiter->Request(r.Uniform(arg->request_size - 1) + 1,
|
|
Env::IO_HIGH);
|
|
}
|
|
arg->limiter->Request(r.Uniform(arg->request_size - 1) + 1, Env::IO_LOW);
|
|
}
|
|
};
|
|
|
|
for (int i = 1; i <= 16; i *= 2) {
|
|
int32_t target = i * 1024 * 10;
|
|
Arg arg(target, i / 4 + 1);
|
|
int64_t old_total_bytes_through = 0;
|
|
for (int iter = 1; iter <= 2; ++iter) {
|
|
// second iteration changes the target dynamically
|
|
if (iter == 2) {
|
|
target *= 2;
|
|
arg.limiter->SetBytesPerSecond(target);
|
|
}
|
|
auto start = env->NowMicros();
|
|
for (int t = 0; t < i; ++t) {
|
|
env->StartThread(writer, &arg);
|
|
}
|
|
env->WaitForJoin();
|
|
|
|
auto elapsed = env->NowMicros() - start;
|
|
double rate =
|
|
(arg.limiter->GetTotalBytesThrough() - old_total_bytes_through) *
|
|
1000000.0 / elapsed;
|
|
old_total_bytes_through = arg.limiter->GetTotalBytesThrough();
|
|
fprintf(stderr,
|
|
"request size [1 - %" PRIi32 "], limit %" PRIi32
|
|
" KB/sec, actual rate: %lf KB/sec, elapsed %.2lf seconds\n",
|
|
arg.request_size - 1, target / 1024, rate / 1024,
|
|
elapsed / 1000000.0);
|
|
|
|
ASSERT_GE(rate / target, 0.9);
|
|
ASSERT_LE(rate / target, 1.1);
|
|
}
|
|
}
|
|
}
|
|
|
|
} // namespace rocksdb
|
|
|
|
int main(int argc, char** argv) {
|
|
::testing::InitGoogleTest(&argc, argv);
|
|
return RUN_ALL_TESTS();
|
|
}
|