disk-io-mgr-stress.h

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// Copyright 2012 Cloudera Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.


#ifndef IMPALA_RUNTIME_DISK_IO_MGR_STRESS_H
#define IMPALA_RUNTIME_DISK_IO_MGR_STRESS_H

#include <vector>
#include <boost/scoped_ptr.hpp>
#include <boost/thread/mutex.hpp>
#include <boost/thread/condition_variable.hpp>
#include <boost/thread/thread.hpp>
#include <boost/unordered_map.hpp>

#include "runtime/disk-io-mgr.h"
#include "runtime/mem-tracker.h"
#include "runtime/thread-resource-mgr.h"

namespace impala {

class DiskIoMgrStress {
 public:
  DiskIoMgrStress(int num_disks, int num_threads_per_disk, int num_clients,
      bool includes_cancellation);

  void Run(int sec);

 private:
  struct Client;

  struct File {
    std::string filename;
    std::string data;  // the data in the file, used to validate
  };


  std::vector<File> files_;

  MemTracker dummy_tracker_;

  boost::scoped_ptr<DiskIoMgr> io_mgr_;

  boost::thread_group readers_;

  int num_clients_;
  Client* clients_;

  bool includes_cancellation_;

  volatile bool shutdown_;

  void NewClient(int i);

  void ClientThread(int client_id);

  void CancelRandomReader();
};

}

#endif