| Alexander Afanasyev | 0845c09 | 2012-07-13 17:45:33 -0700 | [diff] [blame^] | 1 | /* -*- Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil; -*- */ |
| 2 | /* |
| 3 | * Copyright (c) 2011 University of California, Los Angeles |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify |
| 6 | * it under the terms of the GNU General Public License version 2 as |
| 7 | * published by the Free Software Foundation; |
| 8 | * |
| 9 | * This program is distributed in the hope that it will be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | * GNU General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License |
| 15 | * along with this program; if not, write to the Free Software |
| 16 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 17 | * |
| 18 | * Author: Alexander Afanasyev <alexander.afanasyev@ucla.edu> |
| 19 | */ |
| 20 | |
| 21 | #include "load-stats.h" |
| 22 | |
| 23 | using namespace ns3; |
| 24 | |
| 25 | const double EXP_1 = exp (-5.0/60.0); /* 1/exp(5sec/1min) */ |
| 26 | const double EXP_5 = exp (-5.0/300.0); /* 1/exp(5sec/5min) */ |
| 27 | const double EXP_15 = exp (-5.0/900.0); /* 1/exp(5sec/15min) */ |
| 28 | |
| 29 | const double EPSILON = 0.000001; |
| 30 | |
| 31 | namespace ndnSIM |
| 32 | { |
| 33 | |
| 34 | LoadStats::LoadStats () |
| 35 | : counter_ (0) |
| 36 | , avg1_ (0) |
| 37 | , avg5_ (0) |
| 38 | , avg15_ (0) |
| 39 | { |
| 40 | } |
| 41 | |
| 42 | void |
| 43 | LoadStats::Step () |
| 44 | { |
| 45 | // do magic |
| 46 | avg1_ = EXP_1 * avg1_ + (1 - EXP_1) * counter_; |
| 47 | avg5_ = EXP_1 * avg5_ + (1 - EXP_5) * counter_; |
| 48 | avg15_ = EXP_1 * avg15_ + (1 - EXP_15) * counter_; |
| 49 | |
| 50 | counter_ = 0; |
| 51 | } |
| 52 | |
| 53 | LoadStats & |
| 54 | LoadStats::operator ++ (int) |
| 55 | { |
| 56 | counter_ ++; |
| 57 | return *this; |
| 58 | } |
| 59 | |
| 60 | // void |
| 61 | // LoadStats::Increment (uint32_t amount) |
| 62 | // { |
| 63 | // counter_ += amount; |
| 64 | // } |
| 65 | |
| 66 | // uint32_t |
| 67 | // LoadStats::GetCounter () const |
| 68 | // { |
| 69 | // return counter_; |
| 70 | // } |
| 71 | |
| 72 | LoadStats & |
| 73 | LoadStats::operator += (const LoadStats &stats) |
| 74 | { |
| 75 | counter_ += stats.counter_; |
| 76 | return *this; |
| 77 | } |
| 78 | |
| 79 | LoadStats::stats_tuple |
| 80 | LoadStats::GetStats () const |
| 81 | { |
| 82 | return stats_tuple (avg1_, avg5_, avg15_); |
| 83 | } |
| 84 | |
| 85 | bool |
| 86 | LoadStats::IsEmpty () const |
| 87 | { |
| 88 | return (avg1_ < EPSILON && |
| 89 | avg5_ < EPSILON && |
| 90 | avg15_ < EPSILON); |
| 91 | } |
| 92 | |
| 93 | std::ostream & |
| 94 | operator << (std::ostream &os, const LoadStats &stats) |
| 95 | { |
| 96 | LoadStats::stats_tuple data = stats.GetStats (); |
| 97 | os << data.get<0> () << ", " << data.get<1> () << ", " << data.get<2> ();// << std::endl; |
| 98 | return os; |
| 99 | } |
| 100 | |
| 101 | } // ndnSIM |