ltt/branches/poly/lttv/modules/gui/diskperformance/diskperformance.c

   1 /* This file is part of the Linux Trace Toolkit viewer
   2  * Copyright (C) 2005 Peter Ho
   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
  20 #include <math.h>
  21
  22 #include <glib.h>
  23 #include <gtk/gtk.h>
  24 #include <gdk/gdk.h>
  25 #include <stdio.h>
  26 #include <stdlib.h>
  27 #include <string.h>
  28 #include <ltt/ltt.h>
  29 #include <ltt/event.h>
  30 #include <ltt/trace.h>
  31 #include <lttv/module.h>
  32 #include <lttv/hook.h>
  33 #include <lttv/tracecontext.h>
  34 #include <lttv/state.h>
  35 #include <lttv/filter.h>
  36 #include <lttvwindow/lttvwindow.h>
  37 #include <lttvwindow/lttv_plugin_tab.h>
  38 #include <ltt/time.h>
  39
  40 #include "hDiskPerformanceInsert.xpm"
  41
  42
  43 #define g_info(format...) g_log (G_LOG_DOMAIN, G_LOG_LEVEL_INFO, format)
  44 #define g_debug(format...) g_log (G_LOG_DOMAIN, G_LOG_LEVEL_DEBUG, format)
  45 // fixed #define TRACE_NUMBER 0
  46 #define NO_ITEMS 0
  47
  48 enum{
  49   DISKNAME_COLUMN,
  50   BYTES_RD_COLUMN,
  51   BYTES_RD_SEC_COLUMN,
  52   NUM_RD_COLUMN,
  53   BYTES_WR_COLUMN,
  54   BYTES_WR_SEC_COLUMN,
  55   NUM_WR_COLUMN,
  56   N_COLUMNS
  57 };
  58
  59 enum operation_t {
  60      LTTV_READ_OPERATION = 1,
  61      LTTV_WRITE_OPERATION
  62 };
  63
  64 typedef struct _DiskPerformanceData {
  65
  66   Tab        * tab;
  67
  68   LttvPluginTab *ptab;
  69
  70   LttvHooks  * hooks_trace_after;
  71
  72   LttvHooks  * hooks_trace_before;
  73   /* time window */
  74   TimeWindow   time_window;
  75
  76   GtkWidget * scroll_win;
  77
  78   /* Model containing list data */
  79   GtkListStore *store_m;
  80
  81   GtkWidget *hbox_v;
  82
  83   /* Widget to display the data in a columned list */
  84   GtkWidget *tree_v;
  85
  86   /* Selection handler */
  87   GtkTreeSelection *select_c;
  88
  89   GArray *disk_array;
  90
  91   LttvHooksById * event_by_id_hooks;
  92
  93 } DiskPerformanceData;
  94
  95
  96 typedef struct _lttv_block {
  97         guint major_number;
  98         guint minor_number;
  99         guint size;
 100 } lttv_block;
 101
 102 typedef struct _lttv_total_block {
 103         char diskname[10];
 104         guint64 total_bytes_read;
 105         guint num_read_operations;
 106         guint64 total_bytes_written;
 107         guint num_write_operations;
 108
 109 } lttv_total_block;
 110
 111 GSList *g_disk_data_list = NULL ;
 112
 113
 114
 115 /* facility */
 116 GQuark LTT_FACILITY_BLOCK;
 117
 118 /* events */
 119 GQuark LTT_EVENT_BLOCK_READ;
 120 GQuark LTT_EVENT_BLOCK_WRITE;
 121
 122 static DiskPerformanceData *disk_performance_data(LttvPluginTab *ptab);
 123 static void disk_destroy_walk(gpointer data, gpointer user_data);
 124 static gboolean disk_show(void *hook_data, void *call_data);
 125 static gboolean trace_header(void *hook_data, void *call_data);
 126 static gboolean disk_update_time_window(void * hook_data, void * call_data);
 127 static void request_event(  DiskPerformanceData *disk_performance);
 128 void gui_disperformance_free(DiskPerformanceData *event_viewer_data);
 129 static void get_event_detail(LttEvent *e, lttv_block* disk_data);
 130 static char * major_minor_to_diskname( lttv_block* disk_data);
 131 static void sum_data(char* diskname, guint size, enum operation_t opt, GArray *disk_array);
 132 static GtkWidget *disk_performance(LttvPlugin *plugin);
 133
 134 static gboolean block_read_callback(void *hook_data, void *call_data);
 135
 136 static gboolean block_write_callback(void *hook_data, void *call_data);
 137
 138
 139 static gboolean disk_show(void *hook_data, void *call_data){
 140
 141   guint i;
 142   lttv_total_block element;
 143   GtkTreeIter    iter;
 144   LttTime time_interval;
 145   guint64 time_interval_64;
 146   guint64 temp_variable;
 147   guint64 bytes_read_per_sec, bytes_written_per_sec;
 148   g_info(" diskperformance: disk_show() \n");
 149   DiskPerformanceData *disk_performance = (DiskPerformanceData *)hook_data;
 150   GArray *disk_array = disk_performance->disk_array;
 151   time_interval =  ltt_time_sub(disk_performance->time_window.end_time, disk_performance->time_window.start_time);
 152
 153   time_interval_64  = time_interval.tv_sec;
 154   time_interval_64 *= NANOSECONDS_PER_SECOND;
 155   time_interval_64 += time_interval.tv_nsec;
 156   gtk_list_store_clear(disk_performance->store_m);
 157   for(i = 0; i < disk_array->len; i++){
 158
 159     element = g_array_index(disk_array,lttv_total_block,i);
 160     temp_variable =  element.total_bytes_read * NANOSECONDS_PER_SECOND;
 161     bytes_read_per_sec = (guint64) temp_variable / time_interval_64;
 162
 163     temp_variable =  element.total_bytes_written * NANOSECONDS_PER_SECOND;
 164     bytes_written_per_sec  = (guint64) temp_variable / time_interval_64;
 165
 166     gtk_list_store_append (disk_performance->store_m, &iter);
 167     gtk_list_store_set (disk_performance->store_m, &iter,
 168       DISKNAME_COLUMN, element.diskname,
 169       BYTES_RD_COLUMN, element.total_bytes_read,
 170       BYTES_RD_SEC_COLUMN,bytes_read_per_sec,
 171       NUM_RD_COLUMN, element.num_read_operations,
 172       BYTES_WR_COLUMN, element.total_bytes_written,
 173       BYTES_WR_SEC_COLUMN, bytes_written_per_sec,
 174       NUM_WR_COLUMN, element.num_write_operations,
 175       -1);
 176
 177   }
 178   if(disk_performance->disk_array->len)
 179     g_array_remove_range (disk_performance->disk_array,0,disk_performance->disk_array->len);
 180   return FALSE;
 181 }
 182
 183 static gboolean trace_header(void *hook_data, void *call_data){
 184   return FALSE;
 185 }
 186
 187
 188 static gboolean disk_update_time_window(void * hook_data, void * call_data){
 189
 190   DiskPerformanceData *disk_performance = (DiskPerformanceData *) hook_data;
 191   const TimeWindowNotifyData *time_window_nofify_data =  ((const TimeWindowNotifyData *)call_data);
 192   disk_performance->time_window = *time_window_nofify_data->new_time_window;
 193   Tab *tab = disk_performance->tab;
 194   lttvwindow_events_request_remove_all(tab, disk_performance);
 195   request_event( disk_performance);
 196
 197
 198     return FALSE;
 199 }
 200
 201 void gui_disperformance_free(DiskPerformanceData  *eventdata){
 202   Tab *tab = eventdata->tab;
 203   g_info("disperformance.c : gui_disperformance_free, %p", eventdata);
 204   g_info("%p, %p", eventdata, tab);
 205   if(tab != NULL)
 206   {
 207      g_array_free (eventdata->disk_array, TRUE);
 208
 209      lttvwindow_unregister_time_window_notify(tab,
 210         disk_update_time_window,
 211         eventdata);
 212
 213      lttvwindow_events_request_remove_all(eventdata->tab,
 214                                           eventdata);
 215      g_disk_data_list = g_slist_remove(g_disk_data_list, eventdata);
 216   }
 217   g_free(eventdata);
 218   g_info("disperformance.c : gui_disperformance_free end, %p", eventdata);
 219 }
 220
 221
 222
 223
 224
 225
 226 void disk_destructor_full(DiskPerformanceData *disk_data)
 227 {
 228
 229   if(GTK_IS_WIDGET(disk_data->hbox_v))
 230     gtk_widget_destroy(disk_data->hbox_v);
 231
 232 }
 233
 234 static void disk_destroy_walk(gpointer data, gpointer user_data)
 235 {
 236   g_info("Walk destroy GUI disk performance Viewer");
 237   disk_destructor_full((DiskPerformanceData*)data);
 238 }
 239 /**
 240  *  init function
 241  *
 242  *
 243  * This is the entry point of the viewer.
 244  *
 245  */
 246 static void init()
 247 {
 248
 249   g_info("Init diskPerformance.c");
 250
 251   LTT_FACILITY_BLOCK    = g_quark_from_string("block");
 252   LTT_EVENT_BLOCK_READ  =  g_quark_from_string("read");
 253   LTT_EVENT_BLOCK_WRITE = g_quark_from_string("write");
 254
 255   lttvwindow_register_constructor("diskperformance",
 256                                   "/",
 257                                   "Insert Disk Performance",
 258                                   hDiskPerformanceInsert_xpm,
 259                                   "Insert Disk Performance",
 260                                   disk_performance);
 261 }
 262
 263 /**
 264  *  Constructor hook
 265  *
 266  */
 267 GtkWidget *disk_performance(LttvPlugin *plugin)
 268 {
 269   LttvPluginTab *ptab = LTTV_PLUGIN_TAB(plugin);
 270   DiskPerformanceData* disk_data = disk_performance_data(ptab);
 271   if(disk_data)
 272     return disk_data->hbox_v;
 273   else
 274     return NULL;
 275 }
 276
 277 /**
 278  * This function initializes the Event Viewer functionnality through the
 279  * GTK  API.
 280  */
 281 DiskPerformanceData *disk_performance_data(LttvPluginTab *ptab)
 282 {
 283   LttTime end;
 284   GtkTreeViewColumn *column;
 285   GtkCellRenderer *renderer;
 286   DiskPerformanceData* disk_data = g_new(DiskPerformanceData,1) ;
 287
 288   g_info("enter disk_performance_data \n");
 289   Tab *tab = ptab->tab;
 290   disk_data->tab = tab;
 291   disk_data->ptab = ptab;
 292   disk_data->time_window  =  lttvwindow_get_time_window(tab);
 293
 294   disk_data->disk_array = g_array_new(FALSE, FALSE, sizeof(lttv_total_block ));
 295
 296   lttvwindow_register_time_window_notify(tab,
 297                                          disk_update_time_window,
 298                                          disk_data);
 299
 300   disk_data->scroll_win = gtk_scrolled_window_new (NULL, NULL);
 301   gtk_widget_show (disk_data->scroll_win);
 302   gtk_scrolled_window_set_policy(
 303       GTK_SCROLLED_WINDOW(disk_data->scroll_win),
 304       GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
 305
 306   /* Create a model for storing the data list */
 307   disk_data->store_m = gtk_list_store_new (
 308     N_COLUMNS,      /* Total number of columns     */
 309     G_TYPE_STRING,     /* Diskname                 */
 310     G_TYPE_INT64,     /* Bytes read                */
 311     G_TYPE_INT64,     /* Bytes read/sec            */
 312     G_TYPE_INT,
 313     G_TYPE_INT64,    /*  bytes written             */
 314     G_TYPE_INT64,    /*  bytes written/sec         */
 315     G_TYPE_INT
 316     );
 317
 318   disk_data->tree_v = gtk_tree_view_new_with_model (GTK_TREE_MODEL (disk_data->store_m));
 319
 320   g_object_unref (G_OBJECT (disk_data->store_m));
 321
 322   renderer = gtk_cell_renderer_text_new ();
 323
 324   column = gtk_tree_view_column_new_with_attributes ("DiskName",
 325                  renderer,
 326                  "text", DISKNAME_COLUMN,
 327                  NULL);
 328   gtk_tree_view_column_set_alignment (column, 0.0);
 329   gtk_tree_view_column_set_fixed_width (column, 45);
 330   gtk_tree_view_append_column (GTK_TREE_VIEW (disk_data->tree_v), column);
 331
 332   renderer = gtk_cell_renderer_text_new ();
 333   column = gtk_tree_view_column_new_with_attributes ("BytesRead",
 334                  renderer,
 335                  "text", BYTES_RD_COLUMN,
 336                  NULL);
 337   gtk_tree_view_column_set_alignment (column, 0.0);
 338   gtk_tree_view_column_set_fixed_width (column,  220);
 339   gtk_tree_view_append_column (GTK_TREE_VIEW (disk_data->tree_v), column);
 340
 341   renderer = gtk_cell_renderer_text_new ();
 342   column = gtk_tree_view_column_new_with_attributes ("BytesRead/sec",
 343                  renderer,
 344                  "text", BYTES_RD_SEC_COLUMN,
 345                  NULL);
 346   gtk_tree_view_column_set_alignment (column, 1.0);
 347   gtk_tree_view_column_set_fixed_width (column, 220);
 348   gtk_tree_view_append_column (GTK_TREE_VIEW (disk_data->tree_v), column);
 349
 350   renderer = gtk_cell_renderer_text_new ();
 351   column = gtk_tree_view_column_new_with_attributes ("NumReadOperations",
 352                  renderer,
 353                  "text",NUM_RD_COLUMN,
 354                  NULL);
 355   gtk_tree_view_column_set_alignment (column, 1.0);
 356   gtk_tree_view_column_set_fixed_width (column, 220);
 357   gtk_tree_view_append_column (GTK_TREE_VIEW (disk_data->tree_v), column);
 358
 359   renderer = gtk_cell_renderer_text_new ();
 360   column = gtk_tree_view_column_new_with_attributes ("BytesWritten",
 361                  renderer,
 362                  "text", BYTES_WR_COLUMN,
 363                  NULL);
 364   gtk_tree_view_column_set_alignment (column, 0.0);
 365   gtk_tree_view_column_set_fixed_width (column, 145);
 366   gtk_tree_view_append_column (GTK_TREE_VIEW (disk_data->tree_v), column);
 367
 368   renderer = gtk_cell_renderer_text_new ();
 369   column = gtk_tree_view_column_new_with_attributes ("BytesWritten/sec",
 370                  renderer,
 371                  "text", BYTES_WR_SEC_COLUMN,
 372                  NULL);
 373   gtk_tree_view_column_set_alignment (column, 1.0);
 374   gtk_tree_view_column_set_fixed_width (column, 220);
 375   gtk_tree_view_append_column (GTK_TREE_VIEW (disk_data->tree_v), column);
 376
 377   renderer = gtk_cell_renderer_text_new ();
 378   column = gtk_tree_view_column_new_with_attributes ("NumWriteOperations",
 379                  renderer,
 380                  "text",NUM_WR_COLUMN,
 381                  NULL);
 382   gtk_tree_view_column_set_alignment (column, 0.0);
 383   gtk_tree_view_column_set_fixed_width (column, 145);
 384   gtk_tree_view_append_column (GTK_TREE_VIEW (disk_data->tree_v), column);
 385
 386   disk_data->select_c = gtk_tree_view_get_selection (GTK_TREE_VIEW (disk_data->tree_v));
 387   gtk_tree_selection_set_mode (disk_data->select_c, GTK_SELECTION_SINGLE);
 388
 389   gtk_container_add (GTK_CONTAINER (disk_data->scroll_win), disk_data->tree_v);
 390
 391   disk_data->hbox_v = gtk_hbox_new(0, 0);
 392   gtk_box_pack_start(GTK_BOX(disk_data->hbox_v), disk_data->scroll_win, TRUE, TRUE, 0);
 393
 394   gtk_widget_show(disk_data->hbox_v);
 395   gtk_widget_show(disk_data->tree_v);
 396
 397
 398   g_disk_data_list = g_slist_append(g_disk_data_list, disk_data);
 399   g_object_set_data_full(G_OBJECT(disk_data->hbox_v),
 400       "disk_data",
 401        disk_data,
 402       (GDestroyNotify)gui_disperformance_free);
 403
 404   request_event(disk_data);
 405   return disk_data;
 406 }
 407
 408 /**
 409  *
 410  * For each trace in the traceset, this function:
 411  *  - calls lttv_trace_find_hook() & registers a hook function to event_by_id_hooks
 412  *  - registers a callback function to each hook
 413  *  - calls lttvwindow_events_request() to request data in a specific
 414  *    time interval to the main window
 415  *
 416  */
 417 static void request_event(DiskPerformanceData *disk_performance)
 418 {
 419   guint i, k, l, nb_trace;
 420
 421   GArray *hooks;
 422
 423   guint ret;
 424
 425   LttvTraceHook *hook;
 426
 427   LttvTraceState *ts;
 428
 429   LttvTraceHookByFacility *thf;
 430
 431   LttvTracesetContext *tsc = lttvwindow_get_traceset_context(disk_performance->tab);
 432   /* Get the traceset */
 433   LttvTraceset *traceset = tsc->ts;
 434
 435   nb_trace = lttv_traceset_number(traceset);
 436
 437   //for(i = 0; i<MIN(TRACE_NUMBER+1, nb_trace);i++) {
 438   for(i = 0 ; i < nb_trace ; i++) {
 439         EventsRequest *events_request = g_new(EventsRequest, 1);
 440
 441         hooks = g_array_new(FALSE, FALSE, sizeof(LttvTraceHook));
 442
 443         hooks = g_array_set_size(hooks, 2);
 444
 445         /* Get a trace state */
 446         ts = (LttvTraceState *)tsc->traces[i];
 447
 448         disk_performance->event_by_id_hooks = lttv_hooks_by_id_new();
 449         /* Register event_by_id_hooks with a callback function */
 450         ret = lttv_trace_find_hook(ts->parent.t,
 451                 LTT_FACILITY_BLOCK, LTT_EVENT_BLOCK_READ,
 452                 0, 0, 0,
 453                 block_read_callback,
 454                 disk_performance,
 455                 &g_array_index(hooks, LttvTraceHook, 0));
 456
 457         ret = lttv_trace_find_hook(ts->parent.t,
 458                 LTT_FACILITY_BLOCK, LTT_EVENT_BLOCK_WRITE,
 459                 0, 0, 0,
 460                 block_write_callback,
 461                 disk_performance,
 462                 &g_array_index(hooks, LttvTraceHook, 1));
 463
 464         g_assert(!ret);
 465
 466         /*iterate through the facility list*/
 467         for(k = 0 ; k < hooks->len; k++)
 468         {
 469                 hook = &g_array_index(hooks, LttvTraceHook, k);
 470                 for(l=0; l<hook->fac_list->len; l++)
 471                 {
 472                         thf = g_array_index(hook->fac_list, LttvTraceHookByFacility*, l);
 473                         lttv_hooks_add(lttv_hooks_by_id_find(disk_performance->event_by_id_hooks, thf->id),
 474                                 thf->h,
 475                                 disk_performance,
 476                                 LTTV_PRIO_DEFAULT);
 477
 478                 }
 479         }
 480
 481         disk_performance->hooks_trace_after = lttv_hooks_new();
 482         /* Registers  a hook function */
 483         lttv_hooks_add(disk_performance->hooks_trace_after, disk_show, disk_performance, LTTV_PRIO_DEFAULT);
 484
 485         disk_performance->hooks_trace_before = lttv_hooks_new();
 486         /* Registers  a hook function */
 487         lttv_hooks_add(disk_performance->hooks_trace_before, trace_header, disk_performance, LTTV_PRIO_DEFAULT);
 488
 489         /* Initalize the EventsRequest structure */
 490         events_request->owner       = disk_performance;
 491         events_request->viewer_data = disk_performance;
 492         events_request->servicing   = FALSE;
 493         events_request->start_time  = disk_performance->time_window.start_time;
 494         events_request->start_position  = NULL;
 495         events_request->stop_flag          = FALSE;
 496         events_request->end_time           = disk_performance->time_window.end_time;
 497         events_request->num_events         = G_MAXUINT;
 498         events_request->end_position       = NULL;
 499         events_request->trace              = i;
 500         events_request->hooks              = hooks;
 501         events_request->before_chunk_traceset = NULL;
 502         events_request->before_chunk_trace    = disk_performance->hooks_trace_before;
 503         events_request->before_chunk_tracefile= NULL;
 504         events_request->event                   = NULL;
 505         events_request->event_by_id             = disk_performance->event_by_id_hooks;
 506         events_request->after_chunk_tracefile = NULL;
 507         events_request->after_chunk_trace     = NULL;
 508         events_request->after_chunk_traceset    = NULL;
 509         events_request->before_request  = NULL;
 510         events_request->after_request   = disk_performance->hooks_trace_after;
 511
 512         lttvwindow_events_request(disk_performance->tab, events_request);
 513   }
 514
 515 }
 516
 517 /**
 518  *  This function is called whenever a read event occurs.
 519  *
 520  */
 521 static gboolean block_read_callback(void *hook_data, void *call_data)
 522 {
 523   LttEvent *e;
 524   LttTime  event_time;
 525   unsigned cpu_id;
 526   lttv_block block_read;
 527   char *diskname;
 528
 529   LttvTracefileContext *tfc = (LttvTracefileContext *)call_data;
 530   LttvTracefileState *tfs = (LttvTracefileState *)call_data;
 531   DiskPerformanceData *disk_performance = (DiskPerformanceData *)hook_data;
 532   GArray *disk_array = disk_performance->disk_array;
 533   e = ltt_tracefile_get_event(tfc->tf);
 534   event_time = ltt_event_time(e);
 535   cpu_id = ltt_event_cpu_id(e);
 536
 537   get_event_detail(e, &block_read);
 538   diskname = major_minor_to_diskname(&block_read);
 539   sum_data(diskname, block_read.size,LTTV_READ_OPERATION, disk_array);
 540
 541   return FALSE;
 542 }
 543
 544 /**
 545  *  This function is called whenever a write event occurs.
 546  *
 547  */
 548 static gboolean block_write_callback(void *hook_data, void *call_data)
 549 {
 550   LttEvent *e;
 551   LttTime  event_time;
 552   unsigned cpu_id;
 553   lttv_block  block_write;
 554  char *diskname;
 555   LttvTracefileContext *tfc = (LttvTracefileContext *)call_data;
 556   LttvTracefileState *tfs = (LttvTracefileState *)call_data;
 557   DiskPerformanceData *disk_performance = (DiskPerformanceData *)hook_data;
 558   GArray *disk_array = disk_performance->disk_array;
 559   e = ltt_tracefile_get_event(tfc->tf);
 560   event_time = ltt_event_time(e);
 561   cpu_id = ltt_event_cpu_id(e);
 562
 563   get_event_detail(e, &block_write);
 564   diskname = major_minor_to_diskname(&block_write);
 565   sum_data(diskname, block_write.size,LTTV_WRITE_OPERATION, disk_array);
 566
 567  return FALSE;
 568 }
 569
 570 /**
 571  *  This function extracts  the major, minor and size
 572  *
 573  */
 574 static void  get_event_detail(LttEvent *e, lttv_block* disk_data)
 575 {
 576   guint i, num_fields;
 577   LttEventType *event_type;
 578   LttField *element;
 579   LttField *field;
 580   event_type = ltt_event_eventtype(e);
 581   num_fields = ltt_eventtype_num_fields(event_type);
 582
 583   for(i = 0 ; i < num_fields ; i++)
 584   {
 585         element = ltt_eventtype_field(event_type,i);
 586         switch(i)
 587         {
 588           case 0:
 589                 disk_data->major_number = ltt_event_get_long_unsigned(e, element);
 590           break;
 591
 592           case 1:
 593                 disk_data->minor_number = ltt_event_get_long_unsigned(e, element);
 594           break;
 595           case 2:
 596                 disk_data->size = ltt_event_get_long_unsigned(e, element);
 597           break;
 598         }
 599
 600   }
 601
 602 }
 603
 604
 605
 606 /**
 607  *  This function calculates: the number of operations, the total bytes read or written,
 608  *  the average number of bytes read or written by sec.
 609  */
 610 static void sum_data(char* diskname, guint size, enum operation_t operation, GArray *disk_array)
 611 {
 612
 613   lttv_total_block data;
 614   lttv_total_block *element;
 615   guint i;
 616   gboolean  notFound = FALSE;
 617
 618   memset ((void*)&data, 0,sizeof(lttv_total_block));
 619
 620   if(disk_array->len == NO_ITEMS){
 621         strcpy(data.diskname, diskname);
 622         if(operation == LTTV_READ_OPERATION){
 623            data.total_bytes_read = size;
 624            data.num_read_operations++;
 625         }
 626         else{
 627            data.total_bytes_written = size;
 628            data.num_write_operations ++;
 629         }
 630         g_array_append_val (disk_array, data);
 631   }
 632   else{
 633         for(i = 0; i < disk_array->len; i++){
 634             element = &g_array_index(disk_array,lttv_total_block,i);
 635             if(strcmp(element->diskname,diskname) == 0){
 636                 if(operation == LTTV_READ_OPERATION){
 637                   element->num_read_operations++;
 638                   element->total_bytes_read += size;
 639                 }
 640                 else{
 641                   element->num_write_operations ++;
 642                   element->total_bytes_written += size;
 643                 }
 644                 notFound = TRUE;
 645             }
 646         }
 647         if(!notFound){
 648             strcpy(data.diskname, diskname);
 649             if(operation == LTTV_READ_OPERATION){
 650               data.total_bytes_read = size;
 651               data.num_read_operations ++;
 652             }
 653             else{
 654               data.total_bytes_written = size;
 655               data.num_write_operations ++;
 656             }
 657             g_array_append_val (disk_array, data);
 658         }
 659   }
 660 }
 661
 662
 663 static void destroy()
 664 {
 665   g_info("Destroy diskPerformance");
 666   g_slist_foreach(g_disk_data_list, disk_destroy_walk, NULL );
 667   g_slist_free(g_disk_data_list);
 668
 669   lttvwindow_unregister_constructor(disk_performance);
 670
 671 }
 672
 673 /**
 674  *  This function convert  the major and minor  number to the corresponding disk.
 675  *  Data taken from Documentation/devices.txt of the kernel tree.
 676  */
 677 static char * major_minor_to_diskname( lttv_block* disk_data)
 678 {
 679   switch(disk_data->major_number)
 680   {
 681      /* IDE Disks */
 682      case 3: /* First MFM, RLL and IDE hard disk/CD-ROM interface */
 683         if( (disk_data->minor_number >= 0) && (disk_data->minor_number < 64))
 684           return "/dev/hda";
 685         if((disk_data->minor_number >= 64) && (disk_data->minor_number < 128))
 686           return  "/dev/hdb";
 687      break;
 688
 689      case 22: /*Second IDE hard disk/CD-ROM interface */
 690         if( (disk_data->minor_number >= 0) && (disk_data->minor_number < 64))
 691           return "/dev/hdc";
 692         if((disk_data->minor_number >= 64) && (disk_data->minor_number < 128))
 693           return  "/dev/hdd";
 694      break;
 695
 696      case 33: /* Third IDE hard disk/CD-ROM interface */
 697         if( (disk_data->minor_number >= 0) && (disk_data->minor_number < 64))
 698           return "/dev/hde";
 699         if((disk_data->minor_number >= 64) && (disk_data->minor_number < 128))
 700           return  "/dev/hdf";
 701      break;
 702
 703      case 34: /* Fourth IDE hard disk/CD-ROM interface */
 704         if( (disk_data->minor_number >= 0) && (disk_data->minor_number < 64))
 705           return "/dev/hdg";
 706         if((disk_data->minor_number >= 64) && (disk_data->minor_number < 128))
 707           return  "/dev/hdh";
 708      break;
 709
 710      case 56: /* Fifth IDE hard disk/CD-ROM interface */
 711         if( (disk_data->minor_number >= 0) && (disk_data->minor_number < 64))
 712           return "/dev/hdi";
 713         if((disk_data->minor_number >= 64) && (disk_data->minor_number < 128))
 714           return  "/dev/hdj";
 715      break;
 716
 717      case 57: /* Sixth IDE hard disk/CD-ROM interface */
 718         if( (disk_data->minor_number >= 0) && (disk_data->minor_number < 64))
 719           return "/dev/hdk";
 720         if((disk_data->minor_number >= 64) && (disk_data->minor_number < 128))
 721           return  "/dev/hdl";
 722      break;
 723
 724      case 88: /* Seventh IDE hard disk/CD-ROM interface */
 725         if( (disk_data->minor_number >= 0) && (disk_data->minor_number < 64))
 726           return "/dev/hdm";
 727         if((disk_data->minor_number >= 64) && (disk_data->minor_number < 128))
 728           return  "/dev/hdn";
 729      break;
 730
 731      case  89: /* Eighth IDE hard disk/CD-ROM interface */
 732         if( (disk_data->minor_number >= 0) && (disk_data->minor_number < 64))
 733           return "/dev/hdo";
 734         if((disk_data->minor_number >= 64) && (disk_data->minor_number < 128))
 735           return  "/dev/hdp";
 736      break;
 737
 738      case  90: /* Ninth IDE hard disk/CD-ROM interface */
 739         if( (disk_data->minor_number >= 0) && (disk_data->minor_number < 64))
 740           return "/dev/hdq";
 741         if((disk_data->minor_number >= 64) && (disk_data->minor_number < 128))
 742           return  "/dev/hdr";
 743      break;
 744
 745      case  91: /* Tenth IDE hard disk/CD-ROM interface */
 746         if( (disk_data->minor_number >= 0) && (disk_data->minor_number < 64))
 747           return "/dev/hds";
 748         if((disk_data->minor_number >= 64) && (disk_data->minor_number < 128))
 749           return  "/dev/hdt";
 750      break;
 751
 752      /* SCSI Disks */
 753       case  8: /* SCSI disk devices */
 754         if( (disk_data->minor_number >= 0) && (disk_data->minor_number < 16))
 755           return "/dev/sda"; // First SCSI disk whole disk
 756
 757         if((disk_data->minor_number >= 16) && (disk_data->minor_number < 32))
 758           return  "/dev/sdb";// Second SCSI disk whole disk
 759
 760         if((disk_data->minor_number >= 32) && (disk_data->minor_number < 48))
 761           return  "/dev/sdc";// Third SCSI disk whole disk
 762
 763         if((disk_data->minor_number >= 48) && (disk_data->minor_number < 64))
 764           return  "/dev/sdd";// Fourth SCSI disk whole disk
 765
 766         if((disk_data->minor_number >= 64) && (disk_data->minor_number < 80))
 767           return  "/dev/sde";// Fifth SCSI disk whole disk
 768
 769         if((disk_data->minor_number >= 80) && (disk_data->minor_number < 96))
 770           return  "/dev/sdf";// Sixth SCSI disk whole disk
 771
 772         if((disk_data->minor_number >= 96) && (disk_data->minor_number < 112))
 773           return  "/dev/sdg";// seventh SCSI disk whole disk
 774
 775         if((disk_data->minor_number >= 112) && (disk_data->minor_number < 128))
 776           return  "/dev/sdh";// eighth SCSI disk whole disk
 777
 778         if((disk_data->minor_number >= 128) && (disk_data->minor_number < 144))
 779           return  "/dev/sdi";// 9th SCSI disk whole disk
 780
 781         if((disk_data->minor_number >= 144) && (disk_data->minor_number < 160))
 782           return  "/dev/sdj";// 10th SCSI disk whole disk
 783
 784         if((disk_data->minor_number >= 160) && (disk_data->minor_number < 176))
 785           return  "/dev/sdk";// 11th SCSI disk whole disk
 786
 787         if((disk_data->minor_number >= 176) && (disk_data->minor_number < 192))
 788           return  "/dev/sdl";// 12th SCSI disk whole disk
 789
 790         if((disk_data->minor_number >= 192) && (disk_data->minor_number < 208))
 791           return  "/dev/sdm";// 13th SCSI disk whole disk
 792
 793         if((disk_data->minor_number >= 208) && (disk_data->minor_number < 224))
 794           return  "/dev/sdn";// 14th SCSI disk whole disk
 795
 796         if((disk_data->minor_number >= 224) && (disk_data->minor_number < 240))
 797           return  "/dev/sdo";// 15th SCSI disk whole disk
 798
 799         if((disk_data->minor_number >= 240) && (disk_data->minor_number < 256))
 800           return  "/dev/sdp";// 16th SCSI disk whole disk
 801       break;
 802
 803       case  65: /* SCSI disk devices */
 804         if( (disk_data->minor_number >= 0) && (disk_data->minor_number < 16))
 805           return "/dev/sdq";
 806
 807         if((disk_data->minor_number >= 16) && (disk_data->minor_number < 32))
 808           return  "/dev/sdr";
 809
 810         if((disk_data->minor_number >= 32) && (disk_data->minor_number < 48))
 811           return  "/dev/sds";
 812
 813         if((disk_data->minor_number >= 48) && (disk_data->minor_number < 64))
 814           return  "/dev/sdt";
 815
 816         if((disk_data->minor_number >= 64) && (disk_data->minor_number < 80))
 817           return  "/dev/sdu";
 818
 819         if((disk_data->minor_number >= 80) && (disk_data->minor_number < 96))
 820           return  "/dev/sdv";
 821
 822         if((disk_data->minor_number >= 96) && (disk_data->minor_number < 112))
 823           return  "/dev/sdw";
 824
 825         if((disk_data->minor_number >= 112) && (disk_data->minor_number < 128))
 826           return  "/dev/sdy";
 827
 828         if((disk_data->minor_number >= 128) && (disk_data->minor_number < 144))
 829           return  "/dev/sdx";
 830
 831         if((disk_data->minor_number >= 144) && (disk_data->minor_number < 160))
 832           return  "/dev/sdz";
 833
 834         if((disk_data->minor_number >= 160) && (disk_data->minor_number < 176))
 835           return  "/dev/sdaa";
 836
 837         if((disk_data->minor_number >= 176) && (disk_data->minor_number < 192))
 838           return  "/dev/sdab";
 839
 840         if((disk_data->minor_number >= 192) && (disk_data->minor_number < 208))
 841           return  "/dev/sdac";
 842
 843         if((disk_data->minor_number >= 208) && (disk_data->minor_number < 224))
 844           return  "/dev/sdad";
 845
 846         if((disk_data->minor_number >= 224) && (disk_data->minor_number < 240))
 847           return  "/dev/sdae";
 848
 849         if((disk_data->minor_number >= 240) && (disk_data->minor_number < 256))
 850           return  "/dev/sdaf";
 851       break;
 852
 853       case  66: /* SCSI disk devices */
 854         if( (disk_data->minor_number >= 0) && (disk_data->minor_number < 16))
 855           return "/dev/sdag";
 856
 857         if((disk_data->minor_number >= 16) && (disk_data->minor_number < 32))
 858           return  "/dev/sdah";
 859
 860         if((disk_data->minor_number >= 32) && (disk_data->minor_number < 48))
 861           return  "/dev/sdai";
 862
 863         if((disk_data->minor_number >= 48) && (disk_data->minor_number < 64))
 864           return  "/dev/sdaj";
 865
 866         if((disk_data->minor_number >= 64) && (disk_data->minor_number < 80))
 867           return  "/dev/sdak";
 868
 869         if((disk_data->minor_number >= 80) && (disk_data->minor_number < 96))
 870           return  "/dev/sdal";
 871
 872         if((disk_data->minor_number >= 96) && (disk_data->minor_number < 112))
 873           return  "/dev/sdam";
 874
 875         if((disk_data->minor_number >= 112) && (disk_data->minor_number < 128))
 876           return  "/dev/sdan";
 877
 878         if((disk_data->minor_number >= 128) && (disk_data->minor_number < 144))
 879           return  "/dev/sdao";
 880
 881         if((disk_data->minor_number >= 144) && (disk_data->minor_number < 160))
 882           return  "/dev/sdap";
 883
 884         if((disk_data->minor_number >= 160) && (disk_data->minor_number < 176))
 885           return  "/dev/sdaq";
 886
 887         if((disk_data->minor_number >= 176) && (disk_data->minor_number < 192))
 888           return  "/dev/sdar";
 889
 890         if((disk_data->minor_number >= 192) && (disk_data->minor_number < 208))
 891           return  "/dev/sdas";
 892
 893         if((disk_data->minor_number >= 208) && (disk_data->minor_number < 224))
 894           return  "/dev/sdat";
 895
 896         if((disk_data->minor_number >= 224) && (disk_data->minor_number < 240))
 897           return  "/dev/sdau";
 898
 899         if((disk_data->minor_number >= 240) && (disk_data->minor_number < 256))
 900           return  "/dev/sdav";
 901       break;
 902
 903
 904       case  67: /* SCSI disk devices */
 905         if( (disk_data->minor_number >= 0) && (disk_data->minor_number < 16))
 906           return "/dev/sdaw";
 907
 908         if((disk_data->minor_number >= 16) && (disk_data->minor_number < 32))
 909           return  "/dev/sdax";
 910
 911         if((disk_data->minor_number >= 32) && (disk_data->minor_number < 48))
 912           return  "/dev/sday";
 913
 914         if((disk_data->minor_number >= 48) && (disk_data->minor_number < 64))
 915           return  "/dev/sdaz";
 916
 917         if((disk_data->minor_number >= 64) && (disk_data->minor_number < 80))
 918           return  "/dev/sdba";
 919
 920         if((disk_data->minor_number >= 80) && (disk_data->minor_number < 96))
 921           return  "/dev/sdbb";
 922
 923         if((disk_data->minor_number >= 96) && (disk_data->minor_number < 112))
 924           return  "/dev/sdbc";
 925
 926         if((disk_data->minor_number >= 112) && (disk_data->minor_number < 128))
 927           return  "/dev/sdbd";
 928
 929         if((disk_data->minor_number >= 128) && (disk_data->minor_number < 144))
 930           return  "/dev/sdbe";
 931
 932         if((disk_data->minor_number >= 144) && (disk_data->minor_number < 160))
 933           return  "/dev/sdbf";
 934
 935         if((disk_data->minor_number >= 160) && (disk_data->minor_number < 176))
 936           return  "/dev/sdbg";
 937
 938         if((disk_data->minor_number >= 176) && (disk_data->minor_number < 192))
 939           return  "/dev/sdbh";
 940
 941         if((disk_data->minor_number >= 192) && (disk_data->minor_number < 208))
 942           return  "/dev/sdbi";
 943
 944         if((disk_data->minor_number >= 208) && (disk_data->minor_number < 224))
 945           return  "/dev/sdbj";
 946
 947         if((disk_data->minor_number >= 224) && (disk_data->minor_number < 240))
 948           return  "/dev/sdbk";
 949
 950         if((disk_data->minor_number >= 240) && (disk_data->minor_number < 256))
 951           return  "/dev/sdbl";
 952       break;
 953
 954       case  68 : /* SCSI disk devices */
 955         if( (disk_data->minor_number >= 0) && (disk_data->minor_number < 16))
 956           return "/dev/sdbm";
 957
 958         if((disk_data->minor_number >= 16) && (disk_data->minor_number < 32))
 959           return  "/dev/sdbm";
 960
 961         if((disk_data->minor_number >= 32) && (disk_data->minor_number < 48))
 962           return  "/dev/sdbo";
 963
 964         if((disk_data->minor_number >= 48) && (disk_data->minor_number < 64))
 965           return  "/dev/sdbp";
 966
 967         if((disk_data->minor_number >= 64) && (disk_data->minor_number < 80))
 968           return  "/dev/sdbq";
 969
 970         if((disk_data->minor_number >= 80) && (disk_data->minor_number < 96))
 971           return  "/dev/sdbr";
 972
 973         if((disk_data->minor_number >= 96) && (disk_data->minor_number < 112))
 974           return  "/dev/sdbs";
 975
 976         if((disk_data->minor_number >= 112) && (disk_data->minor_number < 128))
 977           return  "/dev/sdbt";
 978
 979         if((disk_data->minor_number >= 128) && (disk_data->minor_number < 144))
 980           return  "/dev/sdbu";
 981
 982         if((disk_data->minor_number >= 144) && (disk_data->minor_number < 160))
 983           return  "/dev/sdbv";
 984
 985         if((disk_data->minor_number >= 160) && (disk_data->minor_number < 176))
 986           return  "/dev/sdbw";
 987
 988         if((disk_data->minor_number >= 176) && (disk_data->minor_number < 192))
 989           return  "/dev/sdbx";
 990
 991         if((disk_data->minor_number >= 192) && (disk_data->minor_number < 208))
 992           return  "/dev/sdby";
 993
 994         if((disk_data->minor_number >= 208) && (disk_data->minor_number < 224))
 995           return  "/dev/sdbz";
 996
 997         if((disk_data->minor_number >= 224) && (disk_data->minor_number < 240))
 998           return  "/dev/sdca";
 999
1000         if((disk_data->minor_number >= 240) && (disk_data->minor_number < 256))
1001           return  "/dev/sdcb";
1002       break;
1003       case  69 : /* SCSI disk devices */
1004         if( (disk_data->minor_number >= 0) && (disk_data->minor_number < 16))
1005           return "/dev/sdcc";
1006
1007         if((disk_data->minor_number >= 16) && (disk_data->minor_number < 32))
1008           return  "/dev/sdcd";
1009
1010         if((disk_data->minor_number >= 32) && (disk_data->minor_number < 48))
1011           return  "/dev/sdce";
1012
1013         if((disk_data->minor_number >= 48) && (disk_data->minor_number < 64))
1014           return  "/dev/sdcf";
1015
1016         if((disk_data->minor_number >= 64) && (disk_data->minor_number < 80))
1017           return  "/dev/sdcg";
1018
1019         if((disk_data->minor_number >= 80) && (disk_data->minor_number < 96))
1020           return  "/dev/sdch";
1021
1022         if((disk_data->minor_number >= 96) && (disk_data->minor_number < 112))
1023           return  "/dev/sdci";
1024
1025         if((disk_data->minor_number >= 112) && (disk_data->minor_number < 128))
1026           return  "/dev/sdcj";
1027
1028         if((disk_data->minor_number >= 128) && (disk_data->minor_number < 144))
1029           return  "/dev/sdck";
1030
1031         if((disk_data->minor_number >= 144) && (disk_data->minor_number < 160))
1032           return  "/dev/sdcl";
1033
1034         if((disk_data->minor_number >= 160) && (disk_data->minor_number < 176))
1035           return  "/dev/sdcm";
1036
1037         if((disk_data->minor_number >= 176) && (disk_data->minor_number < 192))
1038           return  "/dev/sdcn";
1039
1040         if((disk_data->minor_number >= 192) && (disk_data->minor_number < 208))
1041           return  "/dev/sdco";
1042
1043         if((disk_data->minor_number >= 208) && (disk_data->minor_number < 224))
1044           return  "/dev/sdcp";
1045
1046         if((disk_data->minor_number >= 224) && (disk_data->minor_number < 240))
1047           return  "/dev/sdcq";
1048
1049         if((disk_data->minor_number >= 240) && (disk_data->minor_number < 256))
1050           return  "/dev/sdcr";
1051       break;
1052
1053
1054       case  70 : /* SCSI disk devices */
1055         if( (disk_data->minor_number >= 0) && (disk_data->minor_number < 16))
1056           return "/dev/sdcs";
1057
1058         if((disk_data->minor_number >= 16) && (disk_data->minor_number < 32))
1059           return  "/dev/sdct";
1060
1061         if((disk_data->minor_number >= 32) && (disk_data->minor_number < 48))
1062           return  "/dev/sdcu";
1063
1064         if((disk_data->minor_number >= 48) && (disk_data->minor_number < 64))
1065           return  "/dev/sdcv";
1066
1067         if((disk_data->minor_number >= 64) && (disk_data->minor_number < 80))
1068           return  "/dev/sdcw";
1069
1070         if((disk_data->minor_number >= 80) && (disk_data->minor_number < 96))
1071           return  "/dev/sdcx";
1072
1073         if((disk_data->minor_number >= 96) && (disk_data->minor_number < 112))
1074           return  "/dev/sdcy";
1075
1076         if((disk_data->minor_number >= 112) && (disk_data->minor_number < 128))
1077           return  "/dev/sdcz";
1078
1079         if((disk_data->minor_number >= 128) && (disk_data->minor_number < 144))
1080           return  "/dev/sdda";
1081
1082         if((disk_data->minor_number >= 144) && (disk_data->minor_number < 160))
1083           return  "/dev/sddb";
1084
1085         if((disk_data->minor_number >= 160) && (disk_data->minor_number < 176))
1086           return  "/dev/sddc";
1087
1088         if((disk_data->minor_number >= 176) && (disk_data->minor_number < 192))
1089           return  "/dev/sddd";
1090
1091         if((disk_data->minor_number >= 192) && (disk_data->minor_number < 208))
1092           return  "/dev/sdde";
1093
1094         if((disk_data->minor_number >= 208) && (disk_data->minor_number < 224))
1095           return  "/dev/sddf";
1096
1097         if((disk_data->minor_number >= 224) && (disk_data->minor_number < 240))
1098           return  "/dev/sddg";
1099
1100         if((disk_data->minor_number >= 240) && (disk_data->minor_number < 256))
1101           return  "/dev/sddh";
1102       break;
1103
1104       case  71: /* SCSI disk devices */
1105         if( (disk_data->minor_number >= 0) && (disk_data->minor_number < 16))
1106           return "/dev/sddi";
1107
1108         if((disk_data->minor_number >=  16) && (disk_data->minor_number < 32))
1109           return  "/dev/sddj";
1110
1111         if((disk_data->minor_number >= 32) && (disk_data->minor_number < 48))
1112           return  "/dev/sddk";
1113
1114         if((disk_data->minor_number >= 48) && (disk_data->minor_number < 64))
1115           return  "/dev/sddl";
1116
1117         if((disk_data->minor_number >= 64) && (disk_data->minor_number < 80))
1118           return  "/dev/sddm";
1119
1120         if((disk_data->minor_number >= 80) && (disk_data->minor_number < 96))
1121           return  "/dev/sddn";
1122
1123         if((disk_data->minor_number >= 96) && (disk_data->minor_number < 112))
1124           return  "/dev/sddo";
1125
1126         if((disk_data->minor_number >= 112) && (disk_data->minor_number < 128))
1127           return  "/dev/sddp";
1128
1129         if((disk_data->minor_number >= 128) && (disk_data->minor_number < 144))
1130           return  "/dev/sddq";
1131
1132         if((disk_data->minor_number >= 144) && (disk_data->minor_number < 160))
1133           return  "/dev/sddr";
1134
1135         if((disk_data->minor_number >= 160) && (disk_data->minor_number < 176))
1136           return  "/dev/sdds";
1137
1138         if((disk_data->minor_number >= 176) && (disk_data->minor_number < 192))
1139           return  "/dev/sddt";
1140
1141         if((disk_data->minor_number >= 192) && (disk_data->minor_number < 208))
1142           return  "/dev/sddu";
1143
1144         if((disk_data->minor_number >= 208) && (disk_data->minor_number < 224))
1145           return  "/dev/sddv";
1146
1147         if((disk_data->minor_number >= 224) && (disk_data->minor_number < 240))
1148           return  "/dev/sddw";
1149
1150         if((disk_data->minor_number >= 240) && (disk_data->minor_number < 256))
1151           return  "/dev/sddx";
1152       break;
1153
1154       case  128: /* SCSI disk devices */
1155         if( (disk_data->minor_number >= 0) && (disk_data->minor_number < 16))
1156           return "/dev/sddy";
1157
1158         if((disk_data->minor_number >= 16) && (disk_data->minor_number < 32))
1159           return  "/dev/sddz";
1160
1161         if((disk_data->minor_number >= 32) && (disk_data->minor_number < 48))
1162           return  "/dev/sdea";
1163
1164         if((disk_data->minor_number >= 48) && (disk_data->minor_number < 64))
1165           return  "/dev/sdeb";
1166
1167         if((disk_data->minor_number >= 64) && (disk_data->minor_number < 80))
1168           return  "/dev/sdec";
1169
1170         if((disk_data->minor_number >= 80) && (disk_data->minor_number < 96))
1171           return  "/dev/sded";
1172
1173         if((disk_data->minor_number >= 96) && (disk_data->minor_number < 112))
1174           return  "/dev/sdee";
1175
1176         if((disk_data->minor_number >= 112) && (disk_data->minor_number < 128))
1177           return  "/dev/sdef";
1178
1179         if((disk_data->minor_number >= 128) && (disk_data->minor_number < 144))
1180           return  "/dev/sdeg";
1181
1182         if((disk_data->minor_number >= 144) && (disk_data->minor_number < 160))
1183           return  "/dev/sdeh";
1184
1185         if((disk_data->minor_number >= 160) && (disk_data->minor_number < 176))
1186           return  "/dev/sdei";
1187
1188         if((disk_data->minor_number >= 176) && (disk_data->minor_number < 192))
1189           return  "/dev/sdej";
1190
1191         if((disk_data->minor_number >= 192) && (disk_data->minor_number < 208))
1192           return  "/dev/sdek";
1193
1194         if((disk_data->minor_number >= 208) && (disk_data->minor_number < 224))
1195           return  "/dev/sdel";
1196
1197         if((disk_data->minor_number >= 224) && (disk_data->minor_number < 240))
1198           return  "/dev/sdem";
1199
1200         if((disk_data->minor_number >= 240) && (disk_data->minor_number < 256))
1201           return  "/dev/sden";
1202       break;
1203
1204       case  129: /* SCSI disk devices */
1205         if( (disk_data->minor_number >= 0) && (disk_data->minor_number < 16))
1206           return "/dev/sdeo";
1207
1208         if((disk_data->minor_number >= 16) && (disk_data->minor_number < 32))
1209           return  "/dev/sdep";
1210
1211         if((disk_data->minor_number >= 32) && (disk_data->minor_number < 48))
1212           return  "/dev/sdeq";
1213
1214         if((disk_data->minor_number >= 48) && (disk_data->minor_number < 64))
1215           return  "/dev/sder";
1216
1217         if((disk_data->minor_number >= 64) && (disk_data->minor_number < 80))
1218           return  "/dev/sdes";
1219
1220         if((disk_data->minor_number >= 80) && (disk_data->minor_number < 96))
1221           return  "/dev/sdet";
1222
1223         if((disk_data->minor_number >= 96) && (disk_data->minor_number < 112))
1224           return  "/dev/sdeu";
1225
1226         if((disk_data->minor_number >= 112) && (disk_data->minor_number < 128))
1227           return  "/dev/sdev";
1228
1229         if((disk_data->minor_number >= 128) && (disk_data->minor_number < 144))
1230           return  "/dev/sdew";
1231
1232         if((disk_data->minor_number >= 144) && (disk_data->minor_number < 160))
1233           return  "/dev/sdez";
1234
1235         if((disk_data->minor_number >= 160) && (disk_data->minor_number < 176))
1236           return  "/dev/sdey";
1237
1238         if((disk_data->minor_number >= 176) && (disk_data->minor_number < 192))
1239           return  "/dev/sdez";
1240
1241         if((disk_data->minor_number >= 192) && (disk_data->minor_number < 208))
1242           return  "/dev/sdfa";
1243
1244         if((disk_data->minor_number >= 208) && (disk_data->minor_number < 224))
1245           return  "/dev/sdfb";
1246
1247         if((disk_data->minor_number >= 224) && (disk_data->minor_number < 240))
1248           return  "/dev/sdfc";
1249
1250         if((disk_data->minor_number >= 240) && (disk_data->minor_number < 256))
1251           return  "/dev/sdfd";
1252       break;
1253       /*USB block devices*/
1254       case  180:
1255         if( (disk_data->minor_number >= 0) && (disk_data->minor_number < 8))
1256           return "/dev/uba";
1257         if( (disk_data->minor_number >= 8) && (disk_data->minor_number < 16))
1258           return "/dev/ubb";
1259         if( (disk_data->minor_number >= 16) && (disk_data->minor_number < 24))
1260           return "/dev/ubc";
1261       break;
1262
1263   }
1264
1265
1266 }
1267 LTTV_MODULE("diskperformance", "disk info view", \
1268             "Produce disk I/O performance", \
1269             init, destroy, "lttvwindow")
1270