| 1 | /* This file is part of the Linux Trace Toolkit viewer |
| 2 | * Copyright (C) 2009 Benjamin Poirier <benjamin.poirier@polymtl.ca> |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU General Public License Version 2 as |
| 6 | * published by the Free Software Foundation; |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, |
| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 11 | * GNU General Public License for more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU General Public License |
| 14 | * along with this program; if not, write to the Free Software |
| 15 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, |
| 16 | * MA 02111-1307, USA. |
| 17 | */ |
| 18 | |
| 19 | #ifndef EVENT_ANALYSIS_CHULL_H |
| 20 | #define EVENT_ANALYSIS_CHULL_H |
| 21 | |
| 22 | #include <glib.h> |
| 23 | |
| 24 | #include "data_structures.h" |
| 25 | |
| 26 | |
| 27 | typedef struct |
| 28 | { |
| 29 | uint64_t x, y; |
| 30 | } Point; |
| 31 | |
| 32 | |
| 33 | typedef enum |
| 34 | { |
| 35 | EXACT, |
| 36 | /* Used for identity factors (a0= 0, a1= 1) that map a trace to itself. In |
| 37 | * this case, min, max and accuracy are not initialized. |
| 38 | */ |
| 39 | |
| 40 | MIDDLE, |
| 41 | /* The approximation is the middle of the min and max limits, all fields |
| 42 | * are initialized. |
| 43 | */ |
| 44 | |
| 45 | FALLBACK, |
| 46 | /* min and max are not available because the hulls do not respect |
| 47 | * assumptions (hulls should not intersect and the upper half-hull should |
| 48 | * be below the lower half-hull). The approximation is a "best effort". |
| 49 | * All fields are initialized but min and max are NULL. |
| 50 | */ |
| 51 | |
| 52 | INCOMPLETE, |
| 53 | /* min or max is available but not both. The hulls respected assumptions |
| 54 | * but all receives took place after all sends or vice versa. approx and |
| 55 | * accuracy are not initialized. |
| 56 | */ |
| 57 | |
| 58 | ABSENT, |
| 59 | /* The pair of trace did not have communications in both directions (maybe |
| 60 | * even no communication at all). approx and accuracy are not initialized. |
| 61 | */ |
| 62 | |
| 63 | SCREWED, |
| 64 | /* min and max are not available because the algorithms are screwed. One |
| 65 | * of min or max (but not both) is NULL. The other is initialized. Approx |
| 66 | * is not initialized. |
| 67 | */ |
| 68 | |
| 69 | APPROX_NB, // This must be the last member |
| 70 | } ApproxType; |
| 71 | |
| 72 | extern const char* const approxNames[APPROX_NB]; |
| 73 | |
| 74 | typedef struct |
| 75 | { |
| 76 | Factors* min, * max, * approx; |
| 77 | ApproxType type; |
| 78 | double accuracy; |
| 79 | } FactorsCHull; |
| 80 | |
| 81 | |
| 82 | typedef struct |
| 83 | { |
| 84 | unsigned int dropped; |
| 85 | |
| 86 | /* FactorsCHull allFactors[traceNb][traceNb] |
| 87 | * |
| 88 | * allFactors is divided into three parts depending on the position of an |
| 89 | * element allFactors[i][j]: |
| 90 | * Lower triangular part of the matrix |
| 91 | * i > j |
| 92 | * This contains the factors between nodes i and j. These factors |
| 93 | * convert the time values of j to time values of i. |
| 94 | * Diagonal part of the matrix |
| 95 | * i = j |
| 96 | * This contains identity factors (a0= 0, a1= 1). |
| 97 | * Upper triangular part of the matrix |
| 98 | * i < j |
| 99 | * This area is not allocated. |
| 100 | */ |
| 101 | FactorsCHull** allFactors; |
| 102 | } AnalysisStatsCHull; |
| 103 | |
| 104 | |
| 105 | typedef struct |
| 106 | { |
| 107 | /* This array contains file pointers to files where hull points x-y data |
| 108 | * is outputed. Each trace-pair has two files, one for each message |
| 109 | * direction. The structure of the array is the same as for hullArray, |
| 110 | * hullPoints[row][col] where: |
| 111 | * row= inE->traceNum |
| 112 | * col= outE->traceNum |
| 113 | * |
| 114 | * The elements on the diagonal are not initialized. |
| 115 | */ |
| 116 | FILE*** hullPoints; |
| 117 | |
| 118 | /* FactorsCHull allFactors[traceNb][traceNb] |
| 119 | * This is the same array as AnalysisStatsCHull.allFactors. |
| 120 | */ |
| 121 | FactorsCHull** allFactors; |
| 122 | } AnalysisGraphsDataCHull; |
| 123 | |
| 124 | |
| 125 | typedef struct |
| 126 | { |
| 127 | /* Point* hullArray[traceNb][traceNb][] |
| 128 | * |
| 129 | * A message comes from two traces. The lowest numbered trace is |
| 130 | * considered to be the reference clock, CA. The other is CB. The |
| 131 | * direction of messages (sent or received) is relative to CA. Points are |
| 132 | * formed such that their abscissa comes from CA and their ordinate from |
| 133 | * CB. |
| 134 | * |
| 135 | * hullArray is divided into three parts depending on the position of an |
| 136 | * element hullArray[i][j]: |
| 137 | * Lower triangular part of the matrix |
| 138 | * i > j |
| 139 | * This contains the points that form lower hulls, therefore that |
| 140 | * represent "sent" messages. |
| 141 | * Upper triangular part of the matrix |
| 142 | * i < j |
| 143 | * This contains the points that form upper hulls, therefore that |
| 144 | * represent "received" messages. |
| 145 | * Diagonal part of the matrix |
| 146 | * i = j |
| 147 | * This contains empty lists |
| 148 | * |
| 149 | * When a message is such that: |
| 150 | * inE->traceNum < outE->traceNum |
| 151 | * CA is inE->traceNum, therefore the message was received and may |
| 152 | * generate a point in the upper hull. Upper hulls are such that i < |
| 153 | * j, therefore, i= inE->traceNum and j= outE->traceNum. |
| 154 | * inE->traceNum > outE->traceNum |
| 155 | * CA is outE->traceNum, therefore the message was sent and may |
| 156 | * generate a point in the lower hull. Lower hulls are such that i > |
| 157 | * j, therefore, i= inE->traceNum and j= outE->traceNum. Hence, we |
| 158 | * always have: |
| 159 | * i= inE->traceNum |
| 160 | * j= outE->traceNum |
| 161 | * |
| 162 | * Do not let yourself get confused! Always remember that the "lower hull" |
| 163 | * is in fact the "lower half" of a hull. When assumptions are respected, |
| 164 | * the lower half is above the upper half. |
| 165 | */ |
| 166 | GQueue*** hullArray; |
| 167 | |
| 168 | AnalysisStatsCHull* stats; |
| 169 | AnalysisGraphsDataCHull* graphsData; |
| 170 | } AnalysisDataCHull; |
| 171 | |
| 172 | |
| 173 | FactorsCHull** calculateAllFactors(struct _SyncState* const syncState); |
| 174 | void freeAllFactors(const unsigned int traceNb, FactorsCHull** const |
| 175 | allFactors); |
| 176 | |
| 177 | void calculateFactorsMiddle(FactorsCHull* const factors); |
| 178 | void destroyFactorsCHull(FactorsCHull* factorsCHull); |
| 179 | |
| 180 | #endif |