18285c1e2f
Summary: Make RocksDb build and run on Windows to be functionally complete and performant. All existing test cases run with no regressions. Performance numbers are in the pull-request. Test plan: make all of the existing unit tests pass, obtain perf numbers. Co-authored-by: Praveen Rao praveensinghrao@outlook.com Co-authored-by: Sherlock Huang baihan.huang@gmail.com Co-authored-by: Alex Zinoviev alexander.zinoviev@me.com Co-authored-by: Dmitri Smirnov dmitrism@microsoft.com
92 lines
2.7 KiB
C++
92 lines
2.7 KiB
C++
// Copyright (c) 2014, 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.
|
|
|
|
#pragma once
|
|
|
|
#include <atomic>
|
|
#include <deque>
|
|
#include "port/port.h"
|
|
#include "util/mutexlock.h"
|
|
#include "util/random.h"
|
|
#include "rocksdb/env.h"
|
|
#include "rocksdb/rate_limiter.h"
|
|
|
|
namespace rocksdb {
|
|
|
|
class GenericRateLimiter : public RateLimiter {
|
|
public:
|
|
GenericRateLimiter(int64_t refill_bytes,
|
|
int64_t refill_period_us, int32_t fairness);
|
|
|
|
virtual ~GenericRateLimiter();
|
|
|
|
// This API allows user to dynamically change rate limiter's bytes per second.
|
|
virtual void SetBytesPerSecond(int64_t bytes_per_second) override;
|
|
|
|
// Request for token to write bytes. If this request can not be satisfied,
|
|
// the call is blocked. Caller is responsible to make sure
|
|
// bytes < GetSingleBurstBytes()
|
|
virtual void Request(const int64_t bytes, const Env::IOPriority pri) override;
|
|
|
|
virtual int64_t GetSingleBurstBytes() const override {
|
|
return refill_bytes_per_period_.load(std::memory_order_relaxed);
|
|
}
|
|
|
|
virtual int64_t GetTotalBytesThrough(
|
|
const Env::IOPriority pri = Env::IO_TOTAL) const override {
|
|
MutexLock g(&request_mutex_);
|
|
if (pri == Env::IO_TOTAL) {
|
|
return total_bytes_through_[Env::IO_LOW] +
|
|
total_bytes_through_[Env::IO_HIGH];
|
|
}
|
|
return total_bytes_through_[pri];
|
|
}
|
|
|
|
virtual int64_t GetTotalRequests(
|
|
const Env::IOPriority pri = Env::IO_TOTAL) const override {
|
|
MutexLock g(&request_mutex_);
|
|
if (pri == Env::IO_TOTAL) {
|
|
return total_requests_[Env::IO_LOW] + total_requests_[Env::IO_HIGH];
|
|
}
|
|
return total_requests_[pri];
|
|
}
|
|
|
|
private:
|
|
void Refill();
|
|
int64_t CalculateRefillBytesPerPeriod(int64_t rate_bytes_per_sec) {
|
|
return rate_bytes_per_sec * refill_period_us_ / 1000000.0;
|
|
}
|
|
|
|
// This mutex guard all internal states
|
|
mutable port::Mutex request_mutex_;
|
|
|
|
const int64_t refill_period_us_;
|
|
// This variable can be changed dynamically.
|
|
std::atomic<int64_t> refill_bytes_per_period_;
|
|
Env* const env_;
|
|
|
|
bool stop_;
|
|
port::CondVar exit_cv_;
|
|
int32_t requests_to_wait_;
|
|
|
|
int64_t total_requests_[Env::IO_TOTAL];
|
|
int64_t total_bytes_through_[Env::IO_TOTAL];
|
|
int64_t available_bytes_;
|
|
int64_t next_refill_us_;
|
|
|
|
int32_t fairness_;
|
|
Random rnd_;
|
|
|
|
struct Req;
|
|
Req* leader_;
|
|
std::deque<Req*> queue_[Env::IO_TOTAL];
|
|
};
|
|
|
|
} // namespace rocksdb
|