// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
	// vim: ts=8 sw=2 smarttab
	
	#include <algorithm>
	#include <cstdlib>
	#include <iostream>
	
	#include <boost/lexical_cast.hpp>
	#include <boost/icl/interval_map.hpp>
	#include <boost/algorithm/string/join.hpp>
	
	#include "common/SubProcess.h"
	#include "common/fork_function.h"
	
	#include "include/stringify.h"
	#include "CrushTester.h"
	#include "CrushTreeDumper.h"
	#include "include/ceph_features.h"
	
	
	using std::cerr;
	using std::cout;
	using std::map;
	using std::ostringstream;
	using std::string;
	using std::stringstream;
	using std::vector;
	
	void CrushTester::set_device_weight(int dev, float f)
	{
	  int w = (int)(f * 0x10000);
	  if (w < 0)
	    w = 0;
	  if (w > 0x10000)
	    w = 0x10000;
	  device_weight[dev] = w;
	}
	
	int CrushTester::get_maximum_affected_by_rule(int ruleno)
	{
	  // get the number of steps in RULENO
	  int rule_size = crush.get_rule_len(ruleno);
	  vector<int> affected_types;
	  map<int,int> replications_by_type;
	
	  for (int i = 0; i < rule_size; i++){
	    // get what operation is done by the current step
	    int rule_operation = crush.get_rule_op(ruleno, i);
	
	    // if the operation specifies choosing a device type, store it
	    if (rule_operation >= 2 && rule_operation != 4){
	      int desired_replication = crush.get_rule_arg1(ruleno,i);
	      int affected_type = crush.get_rule_arg2(ruleno,i);
	      affected_types.push_back(affected_type);
	      replications_by_type[affected_type] = desired_replication;
	    }
	  }
	
	  /*
	   * now for each of the affected bucket types, see what is the
	   * maximum we are (a) requesting or (b) have
	   */
	
	  map<int,int> max_devices_of_type;
	
	  // loop through the vector of affected types
	  for (vector<int>::iterator it = affected_types.begin(); it != affected_types.end(); ++it){
	    // loop through the number of buckets looking for affected types
	    for (map<int,string>::iterator p = crush.name_map.begin(); p != crush.name_map.end(); ++p){
	      int bucket_type = crush.get_bucket_type(p->first);
	      if ( bucket_type == *it)
	        max_devices_of_type[*it]++;
	    }
	  }
	
	  for(std::vector<int>::iterator it = affected_types.begin(); it != affected_types.end(); ++it){
	    if ( replications_by_type[*it] > 0 && replications_by_type[*it] < max_devices_of_type[*it] )
	      max_devices_of_type[*it] = replications_by_type[*it];
	  }
	
	  /*
	   * get the smallest number of buckets available of any type as this is our upper bound on
	   * the number of replicas we can place
	  */
	  int max_affected = std::max( crush.get_max_buckets(), crush.get_max_devices() );
	
	  for(std::vector<int>::iterator it = affected_types.begin(); it != affected_types.end(); ++it){
	    if (max_devices_of_type[*it] > 0 && max_devices_of_type[*it] < max_affected )
	      max_affected = max_devices_of_type[*it];
	  }
	
	  return max_affected;
	}
	
	
	map<int,int> CrushTester::get_collapsed_mapping()
	{
	  int num_to_check = crush.get_max_devices();
	  int next_id = 0;
	  map<int, int> collapse_mask;
	
	  for (int i = 0; i < num_to_check; i++){
	    if (crush.check_item_present(i)){
	      collapse_mask[i] = next_id;
	      next_id++;
	    }
	  }
	  
	  return collapse_mask;
	}
	
	void CrushTester::adjust_weights(vector<__u32>& weight)
	{
	
	  if (mark_down_device_ratio > 0) {
	    // active buckets
	    vector<int> bucket_ids;
	    for (int i = 0; i < crush.get_max_buckets(); i++) {
	      int id = -1 - i;
	      if (crush.get_bucket_weight(id) > 0) {
	        bucket_ids.push_back(id);
	      }
	    }
	
	    // get buckets that are one level above a device
	    vector<int> buckets_above_devices;
	    for (unsigned i = 0; i < bucket_ids.size(); i++) {
	      // grab the first child object of a bucket and check if it's ID is less than 0
	      int id = bucket_ids[i];
	      if (crush.get_bucket_size(id) == 0)
	        continue;
	      int first_child = crush.get_bucket_item(id, 0); // returns the ID of the bucket or device
	      if (first_child >= 0) {
	        buckets_above_devices.push_back(id);
	      }
	    }
	
	    // permute bucket list
	    for (unsigned i = 0; i < buckets_above_devices.size(); i++) {
	      unsigned j = lrand48() % (buckets_above_devices.size() - 1);
	      std::swap(buckets_above_devices[i], buckets_above_devices[j]);
	    }
	
	    // calculate how many buckets and devices we need to reap...
	    int num_buckets_to_visit = (int) (mark_down_bucket_ratio * buckets_above_devices.size());
	
	    for (int i = 0; i < num_buckets_to_visit; i++) {
	      int id = buckets_above_devices[i];
	      int size = crush.get_bucket_size(id);
	      vector<int> items;
	      for (int o = 0; o < size; o++)
	        items.push_back(crush.get_bucket_item(id, o));
	
	      // permute items
	      for (int o = 0; o < size; o++) {

	        int j = lrand48() % (crush.get_bucket_size(id) - 1);
	        std::swap(items[o], items[j]);
	      }
	
	      int local_devices_to_visit = (int) (mark_down_device_ratio*size);
	      for (int o = 0; o < local_devices_to_visit; o++){
	        int item = crush.get_bucket_item(id, o);
	        weight[item] = 0;
	      }
	    }
	  }
	}
	
	bool CrushTester::check_valid_placement(int ruleno, vector<int> in, const vector<__u32>& weight)
	{
	
	  bool valid_placement = true;
	  vector<int> included_devices;
	  map<string,string> seen_devices;
	
	  // first do the easy check that all devices are "up"
	  for (vector<int>::iterator it = in.begin(); it != in.end(); ++it) {
	    if (weight[(*it)] == 0) {
	      valid_placement = false;
	      break;
	    } else if (weight[(*it)] > 0) {
	      included_devices.push_back( (*it) );
	    }
	  }
	
	  /*
	   * now do the harder test of checking that the CRUSH rule r is not violated
	   * we could test that none of the devices mentioned in out are unique,
	   * but this is a special case of this test
	   */
	
	  // get the number of steps in RULENO
	  int rule_size = crush.get_rule_len(ruleno);
	  vector<string> affected_types;
	
	  // get the smallest type id, and name
	  int min_map_type = crush.get_num_type_names();
	  for (map<int,string>::iterator it = crush.type_map.begin(); it != crush.type_map.end(); ++it ) {
	    if ( (*it).first < min_map_type ) {
	      min_map_type = (*it).first;
	    }
	  }
	
	  string min_map_type_name = crush.type_map[min_map_type];
	
	  // get the types of devices affected by RULENO
	  for (int i = 0; i < rule_size; i++) {
	    // get what operation is done by the current step
	    int rule_operation = crush.get_rule_op(ruleno, i);
	
	    // if the operation specifies choosing a device type, store it
	    if (rule_operation >= 2 && rule_operation != 4) {
	      int affected_type = crush.get_rule_arg2(ruleno,i);
	      affected_types.push_back( crush.get_type_name(affected_type));
	    }
	  }
	
	  // find in if we are only dealing with osd's
	  bool only_osd_affected = false;
	  if (affected_types.size() == 1) {
	    if ((affected_types.back() == min_map_type_name) && (min_map_type_name == "osd")) {
	      only_osd_affected = true;
	    }
	  }
	
	  // check that we don't have any duplicate id's
	  for (vector<int>::iterator it = included_devices.begin(); it != included_devices.end(); ++it) {
	    int num_copies = std::count(included_devices.begin(), included_devices.end(), (*it) );
	    if (num_copies > 1) {
	      valid_placement = false;
	    }
	  }
	
	  // if we have more than just osd's affected we need to do a lot more work
	  if (!only_osd_affected) {
	    // loop through the devices that are "in/up"
	    for (vector<int>::iterator it = included_devices.begin(); it != included_devices.end(); ++it) {
	      if (valid_placement == false)
	        break;
	
	      // create a temporary map of the form (device type, device name in map)
	      map<string,string> device_location_hierarchy = crush.get_full_location(*it);
	
	      // loop over the types affected by RULENO looking for duplicate bucket assignments
	      for (vector<string>::iterator t = affected_types.begin(); t != affected_types.end(); ++t) {
	        if (seen_devices.count( device_location_hierarchy[*t])) {
	          valid_placement = false;
	          break;
	        } else {
	          // store the devices we have seen in the form of (device name, device type)
	          seen_devices[ device_location_hierarchy[*t] ] = *t;
	        }
	      }
	    }
	  }
	
	  return valid_placement;
	}
	
	int CrushTester::random_placement(int ruleno, vector<int>& out, int maxout, vector<__u32>& weight)
	{
	  // get the total weight of the system
	  int total_weight = 0;
	  for (unsigned i = 0; i < weight.size(); i++)
	    total_weight += weight[i];
	
	  if (total_weight == 0 ||
	      crush.get_max_devices() == 0)
	    return -EINVAL;
	
	  // determine the real maximum number of devices to return
	  int devices_requested = std::min(maxout, get_maximum_affected_by_rule(ruleno));
	  bool accept_placement = false;
	
	  vector<int> trial_placement(devices_requested);
	  int attempted_tries = 0;
	  int max_tries = 100;
	  do {
	    // create a vector to hold our trial mappings
	    int temp_array[devices_requested];
	    for (int i = 0; i < devices_requested; i++){
	      temp_array[i] = lrand48() % (crush.get_max_devices());
	    }
	
	    trial_placement.assign(temp_array, temp_array + devices_requested);
	    accept_placement = check_valid_placement(ruleno, trial_placement, weight);
	    attempted_tries++;
	  } while (accept_placement == false && attempted_tries < max_tries);
	
	  // save our random placement to the out vector
	  if (accept_placement)
	    out.assign(trial_placement.begin(), trial_placement.end());
	
	  // or don't....
	  else if (attempted_tries == max_tries)
	    return -EINVAL;
	
	  return 0;
	}
	
	void CrushTester::write_integer_indexed_vector_data_string(vector<string> &dst, int index, vector<int> vector_data)
	{
	  stringstream data_buffer (stringstream::in | stringstream::out);
	  unsigned input_size = vector_data.size();
	
	  // pass the indexing variable to the data buffer
	  data_buffer << index;
	
	  // pass the rest of the input data to the buffer
	  for (unsigned i = 0; i < input_size; i++) {
	    data_buffer << ',' << vector_data[i];
	  }
	
	  data_buffer << std::endl;
	
	  // write the data buffer to the destination
	  dst.push_back( data_buffer.str() );
	}
	
	void CrushTester::write_integer_indexed_vector_data_string(vector<string> &dst, int index, vector<float> vector_data)
	{
	  stringstream data_buffer (stringstream::in | stringstream::out);
	  unsigned input_size = vector_data.size();
	
	  // pass the indexing variable to the data buffer
	  data_buffer << index;
	
	  // pass the rest of the input data to the buffer
	  for (unsigned i = 0; i < input_size; i++) {
	    data_buffer << ',' << vector_data[i];
	  }
	
	  data_buffer << std::endl;
	
	  // write the data buffer to the destination
	  dst.push_back( data_buffer.str() );
	}
	
	void CrushTester::write_integer_indexed_scalar_data_string(vector<string> &dst, int index, int scalar_data)
	{
	  stringstream data_buffer (stringstream::in | stringstream::out);
	
	  // pass the indexing variable to the data buffer
	  data_buffer << index;
	
	  // pass the input data to the buffer
	  data_buffer << ',' << scalar_data;
	  data_buffer << std::endl;
	
	  // write the data buffer to the destination
	  dst.push_back( data_buffer.str() );
	}
	void CrushTester::write_integer_indexed_scalar_data_string(vector<string> &dst, int index, float scalar_data)
	{
	  stringstream data_buffer (stringstream::in | stringstream::out);
	
	  // pass the indexing variable to the data buffer
	  data_buffer << index;
	
	  // pass the input data to the buffer
	  data_buffer << ',' << scalar_data;
	  data_buffer << std::endl;
	
	  // write the data buffer to the destination
	  dst.push_back( data_buffer.str() );
	}
	
	int CrushTester::test_with_fork(int timeout)
	{
	  ostringstream sink;
	  int r = fork_function(timeout, sink, [&]() {
	      return test();
	    });
	  if (r == -ETIMEDOUT) {
	    err << "timed out during smoke test (" << timeout << " seconds)";
	  }
	  return r;
	}
	
	namespace {
	  class BadCrushMap : public std::runtime_error {
	  public:
	    int item;
	    BadCrushMap(const char* msg, int id)
	      : std::runtime_error(msg), item(id) {}
	  };
	  // throws if any node in the crush fail to print
	  class CrushWalker : public CrushTreeDumper::Dumper<void> {
	    typedef void DumbFormatter;
	    typedef CrushTreeDumper::Dumper<DumbFormatter> Parent;
	    int max_id;
	  public:
	    CrushWalker(const CrushWrapper *crush, unsigned max_id)
	      : Parent(crush, CrushTreeDumper::name_map_t()), max_id(max_id) {}
	    void dump_item(const CrushTreeDumper::Item &qi, DumbFormatter *) override {
	      int type = -1;
	      if (qi.is_bucket()) {
		if (!crush->get_item_name(qi.id)) {
		  throw BadCrushMap("unknown item name", qi.id);
		}
		type = crush->get_bucket_type(qi.id);
	      } else {
		if (max_id > 0 && qi.id >= max_id) {
		  throw BadCrushMap("item id too large", qi.id);
		}
		type = 0;
	      }
	      if (!crush->get_type_name(type)) {
		throw BadCrushMap("unknown type name", qi.id);
	      }
	    }
	  };
	}
	
	bool CrushTester::check_name_maps(unsigned max_id) const
	{
	  CrushWalker crush_walker(&crush, max_id);
	  try {
	    // walk through the crush, to see if its self-contained
	    crush_walker.dump(NULL);
	    // and see if the maps is also able to handle straying OSDs, whose id >= 0.
	    // "ceph osd tree" will try to print them, even they are not listed in the
	    // crush map.
	    crush_walker.dump_item(CrushTreeDumper::Item(0, 0, 0, 0), NULL);
	  } catch (const BadCrushMap& e) {
	    err << e.what() << ": item#" << e.item << std::endl;
	    return false;
	  }
	  return true;
	}
	
	static string get_rule_name(CrushWrapper& crush, int rule)
	{
	  if (crush.get_rule_name(rule))
	    return crush.get_rule_name(rule);
	  else
	    return string("rule") + std::to_string(rule);
	}
	
	void CrushTester::check_overlapped_rules() const
	{
	  namespace icl = boost::icl;
	  typedef std::set<string> RuleNames;
	  typedef icl::interval_map<int, RuleNames> Rules;
	  // <ruleset, type> => interval_map<size, {names}>
	  typedef std::map<std::pair<int, int>, Rules> RuleSets;
	  using interval = icl::interval<int>;
	
	  // mimic the logic of crush_find_rule(), but it only return the first matched
	  // one, but I am collecting all of them by the overlapped sizes.
	  RuleSets rulesets;
	  for (int rule = 0; rule < crush.get_max_rules(); rule++) {
	    if (!crush.rule_exists(rule)) {
	      continue;
	    }
	    Rules& rules = rulesets[{crush.get_rule_mask_ruleset(rule),
				     crush.get_rule_mask_type(rule)}];
	    rules += make_pair(interval::closed(crush.get_rule_mask_min_size(rule),
						crush.get_rule_mask_max_size(rule)),
			       RuleNames{get_rule_name(crush, rule)});
	  }
	  for (auto i : rulesets) {
	    auto ruleset_type = i.first;
	    const Rules& rules = i.second;
	    for (auto r : rules) {
	      const RuleNames& names = r.second;
	      // if there are more than one rules covering the same size range,
	      // print them out.
	      if (names.size() > 1) {
		err << "overlapped rules in ruleset " << ruleset_type.first << ": "
		    << boost::join(names, ", ") << "\n";
	      }
	    }
	  }
	}
	
	int CrushTester::test()
	{
	  if (min_rule < 0 || max_rule < 0) {
	    min_rule = 0;
	    max_rule = crush.get_max_rules() - 1;
	  }
	  if (min_x < 0 || max_x < 0) {
	    min_x = 0;
	    max_x = 1023;
	  }
	
	  // initial osd weights
	  vector<__u32> weight;
	
	  /*
	   * note device weight is set by crushtool
	   * (likely due to a given a command line option)
	   */
	  for (int o = 0; o < crush.get_max_devices(); o++) {
	    if (device_weight.count(o)) {
	      weight.push_back(device_weight[o]);
	    } else if (crush.check_item_present(o)) {
	      weight.push_back(0x10000);
	    } else {
	      weight.push_back(0);
	    }
	  }
	
	  if (output_utilization_all)
	    cerr << "devices weights (hex): " << std::hex << weight << std::dec << std::endl;
	
	  // make adjustments
	  adjust_weights(weight);
	
	
	  int num_devices_active = 0;
	  for (vector<__u32>::iterator p = weight.begin(); p != weight.end(); ++p)
	    if (*p > 0)
	      num_devices_active++;
	
	  if (output_choose_tries)
	    crush.start_choose_profile();
	  
	  for (int r = min_rule; r < crush.get_max_rules() && r <= max_rule; r++) {
	    if (!crush.rule_exists(r)) {
	      if (output_statistics)
	        err << "rule " << r << " dne" << std::endl;
	      continue;
	    }
	    if (ruleset >= 0 &&
		crush.get_rule_mask_ruleset(r) != ruleset) {
	      continue;
	    }
	    int minr = min_rep, maxr = max_rep;
	    if (min_rep < 0 || max_rep < 0) {
	      minr = crush.get_rule_mask_min_size(r);
	      maxr = crush.get_rule_mask_max_size(r);
	    }
	    
	    if (output_statistics)
	      err << "rule " << r << " (" << crush.get_rule_name(r)
	      << "), x = " << min_x << ".." << max_x
	      << ", numrep = " << minr << ".." << maxr
	      << std::endl;
	
	    for (int nr = minr; nr <= maxr; nr++) {
	      vector<int> per(crush.get_max_devices());
	      map<int,int> sizes;
	
	      int num_objects = ((max_x - min_x) + 1);
	      float num_devices = (float) per.size(); // get the total number of devices, better to cast as a float here 
	
	      // create a structure to hold data for post-processing
	      tester_data_set tester_data;
	      vector<float> vector_data_buffer_f;
	
	      // create a map to hold batch-level placement information
	      map<int, vector<int> > batch_per;
	      int objects_per_batch = num_objects / num_batches;
	      int batch_min = min_x;
	      int batch_max = min_x + objects_per_batch - 1;
	
	      // get the total weight of the system
	      int total_weight = 0;
	      for (unsigned i = 0; i < per.size(); i++)
	        total_weight += weight[i];
	
	      if (total_weight == 0)
		continue;
	
	      // compute the expected number of objects stored per device in the absence of weighting
	      float expected_objects = std::min(nr, get_maximum_affected_by_rule(r)) * num_objects;
	
	      // compute each device's proportional weight
	      vector<float> proportional_weights( per.size() );
	
	      for (unsigned i = 0; i < per.size(); i++)
	        proportional_weights[i] = (float) weight[i] / (float) total_weight;
	
	      if (output_data_file) {
	        // stage the absolute weight information for post-processing
	        for (unsigned i = 0; i < per.size(); i++) {
	          tester_data.absolute_weights[i] = (float) weight[i] / (float)0x10000;
	        }
	
	        // stage the proportional weight information for post-processing
	        for (unsigned i = 0; i < per.size(); i++) {
	          if (proportional_weights[i] > 0 )
	            tester_data.proportional_weights[i] = proportional_weights[i];
	
	          tester_data.proportional_weights_all[i] = proportional_weights[i];
	        }
	
	      }
	      // compute the expected number of objects stored per device when a device's weight is considered
	      vector<float> num_objects_expected(num_devices);
	
	      for (unsigned i = 0; i < num_devices; i++)
	        num_objects_expected[i] = (proportional_weights[i]*expected_objects);
	
	      for (int current_batch = 0; current_batch < num_batches; current_batch++) {
	        if (current_batch == (num_batches - 1)) {
	          batch_max = max_x;
	          objects_per_batch = (batch_max - batch_min + 1);
	        }
	
	        float batch_expected_objects = std::min(nr, get_maximum_affected_by_rule(r)) * objects_per_batch;
	        vector<float> batch_num_objects_expected( per.size() );
	
	        for (unsigned i = 0; i < per.size() ; i++)
	          batch_num_objects_expected[i] = (proportional_weights[i]*batch_expected_objects);
	
	        // create a vector to hold placement results temporarily 
	        vector<int> temporary_per ( per.size() );
	
	        for (int x = batch_min; x <= batch_max; x++) {
	          // create a vector to hold the results of a CRUSH placement or RNG simulation
	          vector<int> out;
	
	          if (use_crush) {
	            if (output_mappings)
		      err << "CRUSH"; // prepend CRUSH to placement output
	            uint32_t real_x = x;
	            if (pool_id != -1) {
	              real_x = crush_hash32_2(CRUSH_HASH_RJENKINS1, x, (uint32_t)pool_id);
	            }
	            crush.do_rule(r, real_x, out, nr, weight, 0);
	          } else {
	            if (output_mappings)
		      err << "RNG"; // prepend RNG to placement output to denote simulation
	            // test our new monte carlo placement generator
	            random_placement(r, out, nr, weight);
	          }
	
		  if (output_mappings)
		    err << " rule " << r << " x " << x << " " << out << std::endl;
	
	          if (output_data_file)
	            write_integer_indexed_vector_data_string(tester_data.placement_information, x, out);
	
	          bool has_item_none = false;
	          for (unsigned i = 0; i < out.size(); i++) {
	            if (out[i] != CRUSH_ITEM_NONE) {
	              per[out[i]]++;
	              temporary_per[out[i]]++;
	            } else {
	              has_item_none = true;
	            }
	          }
	
	          batch_per[current_batch] = temporary_per;
	          sizes[out.size()]++;
	          if (output_bad_mappings && 
	              (out.size() != (unsigned)nr ||
	               has_item_none)) {
	            err << "bad mapping rule " << r << " x " << x << " num_rep " << nr << " result " << out << std::endl;
	          }
	        }
	
	        batch_min = batch_max + 1;
	        batch_max = batch_min + objects_per_batch - 1;
	      }
	
	      for (unsigned i = 0; i < per.size(); i++)
	        if (output_utilization && !output_statistics)
	          err << "  device " << i
	          << ":\t" << per[i] << std::endl;
	
	      for (map<int,int>::iterator p = sizes.begin(); p != sizes.end(); ++p)
	        if (output_statistics)
	          err << "rule " << r << " (" << crush.get_rule_name(r) << ") num_rep " << nr
	          << " result size == " << p->first << ":\t"
	          << p->second << "/" << (max_x-min_x+1) << std::endl;
	
	      if (output_statistics)
	        for (unsigned i = 0; i < per.size(); i++) {
	          if (output_utilization) {
	            if (num_objects_expected[i] > 0 && per[i] > 0) {
	              err << "  device " << i << ":\t"
	                  << "\t" << " stored " << ": " << per[i]
	                  << "\t" << " expected " << ": " << num_objects_expected[i]
	                  << std::endl;
	            }
	          } else if (output_utilization_all) {
	            err << "  device " << i << ":\t"
	                << "\t" << " stored " << ": " << per[i]
	                << "\t" << " expected " << ": " << num_objects_expected[i]
	                << std::endl;
	          }
	        }
	
	      if (output_data_file)
	        for (unsigned i = 0; i < per.size(); i++) {
	          vector_data_buffer_f.clear();
	          vector_data_buffer_f.push_back( (float) per[i]);
	          vector_data_buffer_f.push_back( (float) num_objects_expected[i]);
	
	          write_integer_indexed_vector_data_string(tester_data.device_utilization_all, i, vector_data_buffer_f);
	
	          if (num_objects_expected[i] > 0 && per[i] > 0)
	            write_integer_indexed_vector_data_string(tester_data.device_utilization, i, vector_data_buffer_f);
	        }
	
	      if (output_data_file && num_batches > 1) {
	        // stage batch utilization information for post-processing
	        for (int i = 0; i < num_batches; i++) {
	          write_integer_indexed_vector_data_string(tester_data.batch_device_utilization_all, i, batch_per[i]);
	          write_integer_indexed_vector_data_string(tester_data.batch_device_expected_utilization_all, i, batch_per[i]);
	        }
	      }
	
	      string rule_tag = crush.get_rule_name(r);
	
	      if (output_csv)
	        write_data_set_to_csv(output_data_file_name+rule_tag,tester_data);
	    }
	  }
	
	  if (output_choose_tries) {
	    __u32 *v = 0;
	    int n = crush.get_choose_profile(&v);
	    for (int i=0; i<n; i++) {
	      cout.setf(std::ios::right);
	      cout << std::setw(2)
	      << i << ": " << std::setw(9) << v[i];
	      cout.unsetf(std::ios::right);
	      cout << std::endl;
	    }
	
	    crush.stop_choose_profile();
	  }
	
	  return 0;
	}
	
	int CrushTester::compare(CrushWrapper& crush2)
	{
	  if (min_rule < 0 || max_rule < 0) {
	    min_rule = 0;
	    max_rule = crush.get_max_rules() - 1;
	  }
	  if (min_x < 0 || max_x < 0) {
	    min_x = 0;
	    max_x = 1023;
	  }
	
	  // initial osd weights
	  vector<__u32> weight;
	
	  /*
	   * note device weight is set by crushtool
	   * (likely due to a given a command line option)
	   */
	  for (int o = 0; o < crush.get_max_devices(); o++) {
	    if (device_weight.count(o)) {
	      weight.push_back(device_weight[o]);
	    } else if (crush.check_item_present(o)) {
	      weight.push_back(0x10000);
	    } else {
	      weight.push_back(0);
	    }
	  }
	
	  // make adjustments
	  adjust_weights(weight);
	
	  map<int,int> bad_by_rule;
	
	  int ret = 0;
	  for (int r = min_rule; r < crush.get_max_rules() && r <= max_rule; r++) {
	    if (!crush.rule_exists(r)) {
	      if (output_statistics)
	        err << "rule " << r << " dne" << std::endl;
	      continue;
	    }
	    if (ruleset >= 0 &&
		crush.get_rule_mask_ruleset(r) != ruleset) {
	      continue;
	    }
	    int minr = min_rep, maxr = max_rep;
	    if (min_rep < 0 || max_rep < 0) {
	      minr = crush.get_rule_mask_min_size(r);
	      maxr = crush.get_rule_mask_max_size(r);
	    }
	    int bad = 0;
	    for (int nr = minr; nr <= maxr; nr++) {
	      for (int x = min_x; x <= max_x; ++x) {
		vector<int> out;
		crush.do_rule(r, x, out, nr, weight, 0);
		vector<int> out2;
		crush2.do_rule(r, x, out2, nr, weight, 0);
		if (out != out2) {
		  ++bad;
		}
	      }
	    }
	    if (bad) {
	      ret = -1;
	    }
	    int max = (maxr - minr + 1) * (max_x - min_x + 1);
	    double ratio = (double)bad / (double)max;
	    cout << "rule " << r << " had " << bad << "/" << max
		 << " mismatched mappings (" << ratio << ")" << std::endl;
	  }
	  if (ret) {
	    cerr << "warning: maps are NOT equivalent" << std::endl;
	  } else {
	    cout << "maps appear equivalent" << std::endl;
	  }
	  return ret;
	}