03d7fdf3 |
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 | |
21 | Each field of the interrupt viewer is summarized as follows: |
22 | |
23 | - CPUID: processor ID |
24 | |
25 | - IrqId: IRQ ID |
26 | |
27 | - Frequency (Hz): the number of interrupts per second (Hz). |
28 | We compute the total number of interrupts. Then |
29 | we divide it by the time interval. |
30 | |
31 | - Total Duration (nsec): the sum of each interrupt duration in nsec. |
32 | For a given Irq ID, we sum the duration of each interrupt |
33 | to give us the total duration |
34 | |
35 | - Duration Standard_deviation = sqrt(1/N Sum ((xi -Xa)^2)) where |
36 | N: number of interrupts |
37 | xi: duration of an interrupt (nsec) |
38 | Xa: average duration (nsec) |
39 | The formula is taken from wikipedia: http://en.wikipedia.org/wiki/Standard_deviation. |
40 | To calculate the duration standard deviation, we make two EventsRequest passes to the main window. |
41 | In the first EventsRequest pass, we calculate the total number of interrupts to compute for |
42 | the average Xa. In the second EventsRequest pass, calculate the standard deviation. |
43 | |
44 | |
45 | - Max IRQ handler duration (nsec) [time interval]: the longest IRQ handler duration in nsec. |
46 | |
47 | - Min IRQ handler duration (nsec) [time interval]: the shortest IRQ handler duration in nsec. |
48 | |
49 | - Average period (nsec): 1/Frequency(in HZ). The frequency is computed above. |
50 | |
51 | -Period Standard_deviation = sqrt(1/N Sum ((xi -Xa)^2)) where |
52 | N: number of interrupts |
53 | xi: duration of an interrupt |
54 | Xa: Period = 1/Frequency (in Hz) |
55 | |
56 | -Frequency Standard_deviation = sqrt(1/N Sum ((xi -Xa)^2)) |
57 | N: number of interrupts |
58 | xi: duration of an interrupt |
59 | Xa: Frequency (Hz) |
60 | |
61 | |
62 | *******************************************************************/ |
63 | |
64 | |
65 | |
66 | #include <math.h> |
67 | #include <glib.h> |
68 | #include <gtk/gtk.h> |
69 | #include <gdk/gdk.h> |
70 | #include <stdio.h> |
71 | #include <stdlib.h> |
72 | #include <math.h> |
73 | #include <string.h> |
74 | #include <ltt/ltt.h> |
75 | #include <ltt/event.h> |
76 | #include <ltt/type.h> |
77 | #include <ltt/trace.h> |
78 | #include <ltt/facility.h> |
79 | #include <lttv/module.h> |
80 | #include <lttv/hook.h> |
81 | #include <lttv/tracecontext.h> |
82 | #include <lttv/state.h> |
83 | #include <lttv/filter.h> |
84 | #include <lttvwindow/lttvwindow.h> |
85 | #include <lttvwindow/lttv_plugin_tab.h> |
86 | #include <ltt/time.h> |
87 | |
88 | #include "hInterruptsInsert.xpm" |
89 | |
90 | #define g_info(format...) g_log (G_LOG_DOMAIN, G_LOG_LEVEL_INFO, format) |
91 | #define g_debug(format...) g_log (G_LOG_DOMAIN, G_LOG_LEVEL_DEBUG, format) |
92 | #define NO_ITEMS 0 |
93 | |
94 | typedef struct |
95 | { |
96 | LttTime duration; |
97 | LttTime start_time; |
98 | LttTime end_time; |
99 | }IrqDuration; |
100 | |
101 | typedef struct { |
102 | guint cpu_id; |
103 | guint id; |
104 | guint TotalNumberOfInterrupts; |
105 | LttTime total_duration; |
106 | guint average_duration; |
107 | IrqDuration max_irq_handler; |
108 | IrqDuration min_irq_handler; |
109 | }Irq; |
110 | |
111 | typedef struct { |
112 | guint id; |
113 | guint cpu_id; |
114 | LttTime event_time; |
115 | }irq_entry; |
116 | |
117 | |
118 | typedef struct |
119 | { |
120 | guint irqId; |
121 | guint TotalNumberOfInterrupts;//frequency;// |
122 | guint64 sumOfDurations; // to store the Sum ((xi -Xa)^2) of the duration Standard deviation |
123 | guint64 sumOfPeriods; // to store the Sum ((xi -Xa)^2) of the period Standard deviation |
124 | guint64 sumOfFrequencies;// to store the Sum ((xi -Xa)^2) of the frequency Standard deviation |
125 | |
126 | }SumId; |
127 | |
128 | enum type_t { |
129 | IRQ_ENTRY, |
130 | IRQ_EXIT |
131 | }; |
132 | |
133 | /** Array containing instanced objects. Used when module is unloaded */ |
134 | static GSList *interrupt_data_list = NULL ; |
135 | |
136 | |
137 | //fixed #define TRACE_NUMBER 0 |
138 | |
139 | typedef struct _InterruptEventData { |
140 | |
141 | /*Graphical Widgets */ |
142 | GtkWidget * ScrollWindow; |
143 | GtkListStore *ListStore; |
144 | GtkWidget *Hbox; |
145 | GtkWidget *TreeView; |
146 | GtkTreeSelection *SelectionTree; |
147 | |
148 | Tab * tab; /* tab that contains this plug-in*/ |
149 | LttvPluginTab *ptab; |
150 | LttvHooks * event_hooks; |
151 | LttvHooks * hooks_trace_after; |
152 | LttvHooks * hooks_trace_before; |
153 | TimeWindow time_window; |
154 | LttvHooksById * event_by_id_hooks; |
155 | GArray *FirstRequestIrqExit; |
156 | GArray *FirstRequestIrqEntry; |
157 | GArray *SecondRequestIrqEntry; |
158 | GArray *SecondRequestIrqExit; |
159 | GArray *SumArray; |
160 | |
161 | } InterruptEventData ; |
162 | |
163 | |
164 | /* Function prototypes */ |
165 | |
166 | static gboolean interrupt_update_time_window(void * hook_data, void * call_data); |
167 | static GtkWidget *interrupts(LttvPlugin *plugin); |
168 | static InterruptEventData *system_info(LttvPluginTab *ptab); |
169 | void interrupt_destructor(InterruptEventData *event_viewer_data); |
170 | static void FirstRequest(InterruptEventData *event_data ); |
171 | static guint64 get_interrupt_id(LttEvent *e); |
172 | static gboolean trace_header(void *hook_data, void *call_data); |
173 | static gboolean DisplayViewer (void *hook_data, void *call_data); |
174 | static void CalculateData(LttTime time_exit, guint cpu_id, InterruptEventData *event_data); |
175 | static void CalculateTotalDurationAndMaxIrqDurationAndMinIrqDuration(irq_entry *e, LttTime time_exit, GArray *FirstRequestIrqExit); |
176 | static gboolean FirstRequestIrqEntryCallback(void *hook_data, void *call_data); |
177 | static gboolean FirstRequestIrqExitCallback(void *hook_data, void *call_data); |
178 | static gboolean SecondRequest(void *hook_data, void *call_data); |
179 | static void CalculateAverageDurationForEachIrqId(InterruptEventData *event_data); |
180 | static gboolean SecondRequestIrqEntryCallback(void *hook_data, void *call_data); |
181 | static gboolean SecondRequestIrqExitCallback(void *hook_data, void *call_data); |
182 | static void CalculateXi(LttEvent *event, InterruptEventData *event_data); |
183 | static void SumItems(gint irq_id, LttTime Xi, InterruptEventData *event_data); |
184 | static int CalculateDurationStandardDeviation(gint id, InterruptEventData *event_data); |
185 | static int CalculatePeriodStandardDeviation(gint id, InterruptEventData *event_data); |
186 | static int FrequencyInHZ(gint NumberOfInterruptions, TimeWindow time_window); |
187 | static guint64 CalculatePeriodInnerPart(guint Xi, guint FrequencyHZ); |
188 | static guint64 CalculateFrequencyInnerPart(guint Xi_in_ns, guint FrequencyHZ); |
189 | static void InterruptFree(InterruptEventData *event_viewer_data); |
190 | static int CalculateFrequencyStandardDeviation(gint id, InterruptEventData *event_data); |
191 | |
192 | /* Enumeration of the columns */ |
193 | enum{ |
194 | CPUID_COLUMN, |
195 | IRQ_ID_COLUMN, |
196 | FREQUENCY_COLUMN, |
197 | DURATION_COLUMN, |
198 | DURATION_STANDARD_DEV_COLUMN, |
199 | MAX_IRQ_HANDLER_COLUMN, |
200 | MIN_IRQ_HANDLER_COLUMN, |
201 | AVERAGE_PERIOD, |
202 | PERIOD_STANDARD_DEV_COLUMN, |
203 | FREQUENCY_STANDARD_DEV_COLUMN, |
204 | N_COLUMNS |
205 | }; |
206 | |
207 | |
208 | |
209 | /** |
210 | * init function |
211 | * |
212 | * |
213 | * This is the entry point of the viewer. |
214 | * |
215 | */ |
216 | static void init() { |
217 | g_info("interrupts: init()"); |
218 | lttvwindow_register_constructor("interrupts", |
219 | "/", |
220 | "Insert Interrupts View", |
221 | hInterruptsInsert_xpm, |
222 | "Insert Interrupts View", |
223 | interrupts); |
224 | |
225 | } |
226 | |
227 | |
228 | /** |
229 | * Constructor hook |
230 | * |
231 | */ |
232 | static GtkWidget *interrupts(LttvPlugin *plugin) |
233 | { |
234 | LttvPluginTab *ptab = LTTV_PLUGIN_TAB(plugin); |
235 | InterruptEventData* event_data = system_info(ptab) ; |
236 | if(event_data) |
237 | return event_data->Hbox; |
238 | else |
239 | return NULL; |
240 | } |
241 | |
242 | /** |
243 | * This function initializes the Event Viewer functionnality through the |
244 | * GTK API. |
245 | */ |
246 | InterruptEventData *system_info(LttvPluginTab *ptab) |
247 | { |
248 | |
249 | LttTime end; |
250 | GtkTreeViewColumn *column; |
251 | GtkCellRenderer *renderer; |
252 | InterruptEventData* event_viewer_data = g_new(InterruptEventData,1) ; |
253 | Tab *tab = ptab->tab; |
254 | event_viewer_data->ptab = ptab; |
255 | event_viewer_data->tab = tab; |
256 | |
257 | /*Get the current time frame from the main window */ |
258 | event_viewer_data->time_window = lttvwindow_get_time_window(tab); |
259 | |
260 | event_viewer_data->FirstRequestIrqExit = g_array_new(FALSE, FALSE, sizeof(Irq)); |
261 | event_viewer_data->FirstRequestIrqEntry = g_array_new(FALSE, FALSE, sizeof(irq_entry)); |
262 | |
263 | event_viewer_data->SecondRequestIrqEntry = g_array_new(FALSE, FALSE, sizeof(irq_entry)); |
264 | event_viewer_data->SecondRequestIrqExit = g_array_new(FALSE, FALSE, sizeof(Irq)); |
265 | |
266 | event_viewer_data->SumArray = g_array_new(FALSE, FALSE, sizeof(SumId)); |
267 | |
268 | |
269 | /*Create tha main window for the viewer */ |
270 | event_viewer_data->ScrollWindow = gtk_scrolled_window_new (NULL, NULL); |
271 | gtk_widget_show (event_viewer_data->ScrollWindow); |
272 | gtk_scrolled_window_set_policy( |
273 | GTK_SCROLLED_WINDOW(event_viewer_data->ScrollWindow), |
274 | GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC/*GTK_POLICY_NEVER*/); |
275 | |
276 | /* Create a model for storing the data list */ |
277 | event_viewer_data->ListStore = gtk_list_store_new ( |
278 | N_COLUMNS, /* Total number of columns */ |
279 | G_TYPE_INT, /* CPUID */ |
280 | G_TYPE_INT, /* IRQ_ID */ |
281 | G_TYPE_INT, /* Frequency */ |
282 | G_TYPE_UINT64, /* Duration */ |
283 | G_TYPE_INT, /* standard deviation */ |
284 | G_TYPE_STRING, /* Max IRQ handler */ |
285 | G_TYPE_STRING, /* Min IRQ handler */ |
286 | G_TYPE_INT, /* Average period */ |
287 | G_TYPE_INT, /* period standard deviation */ |
288 | G_TYPE_INT /* frequency standard deviation */ |
289 | |
290 | ); |
291 | |
292 | event_viewer_data->TreeView = gtk_tree_view_new_with_model (GTK_TREE_MODEL (event_viewer_data->ListStore)); |
293 | |
294 | g_object_unref (G_OBJECT (event_viewer_data->ListStore)); |
295 | |
296 | renderer = gtk_cell_renderer_text_new (); |
297 | column = gtk_tree_view_column_new_with_attributes ("CPU ID", |
298 | renderer, |
299 | "text", CPUID_COLUMN, |
300 | NULL); |
301 | gtk_tree_view_column_set_alignment (column, 0.0); |
302 | gtk_tree_view_column_set_fixed_width (column, 45); |
303 | gtk_tree_view_append_column (GTK_TREE_VIEW (event_viewer_data->TreeView), column); |
304 | |
305 | |
306 | renderer = gtk_cell_renderer_text_new (); |
307 | column = gtk_tree_view_column_new_with_attributes ("IRQ ID", |
308 | renderer, |
309 | "text", IRQ_ID_COLUMN, |
310 | NULL); |
311 | gtk_tree_view_column_set_alignment (column, 0.0); |
312 | gtk_tree_view_column_set_fixed_width (column, 220); |
313 | gtk_tree_view_append_column (GTK_TREE_VIEW (event_viewer_data->TreeView), column); |
314 | |
315 | renderer = gtk_cell_renderer_text_new (); |
316 | column = gtk_tree_view_column_new_with_attributes ("Frequency (Hz)", |
317 | renderer, |
318 | "text", FREQUENCY_COLUMN, |
319 | NULL); |
320 | gtk_tree_view_column_set_alignment (column, 1.0); |
321 | gtk_tree_view_column_set_fixed_width (column, 220); |
322 | gtk_tree_view_append_column (GTK_TREE_VIEW (event_viewer_data->TreeView), column); |
323 | |
324 | renderer = gtk_cell_renderer_text_new (); |
325 | column = gtk_tree_view_column_new_with_attributes ("Total Duration (nsec)", |
326 | renderer, |
327 | "text", DURATION_COLUMN, |
328 | NULL); |
329 | gtk_tree_view_column_set_alignment (column, 0.0); |
330 | gtk_tree_view_column_set_fixed_width (column, 145); |
331 | gtk_tree_view_append_column (GTK_TREE_VIEW (event_viewer_data->TreeView), column); |
332 | |
333 | |
334 | renderer = gtk_cell_renderer_text_new (); |
335 | column = gtk_tree_view_column_new_with_attributes ("Duration standard deviation (nsec)", |
336 | renderer, |
337 | "text", DURATION_STANDARD_DEV_COLUMN, |
338 | NULL); |
339 | gtk_tree_view_column_set_alignment (column, 0.0); |
340 | gtk_tree_view_column_set_fixed_width (column, 200); |
341 | gtk_tree_view_append_column (GTK_TREE_VIEW (event_viewer_data->TreeView), column); |
342 | |
343 | renderer = gtk_cell_renderer_text_new (); |
344 | column = gtk_tree_view_column_new_with_attributes ("Max IRQ handler duration (nsec) [time interval]", |
345 | renderer, |
346 | "text", MAX_IRQ_HANDLER_COLUMN, |
347 | NULL); |
348 | gtk_tree_view_column_set_alignment (column, 0.0); |
349 | gtk_tree_view_column_set_fixed_width (column, 250); |
350 | gtk_tree_view_append_column (GTK_TREE_VIEW (event_viewer_data->TreeView), column); |
351 | |
352 | renderer = gtk_cell_renderer_text_new (); |
353 | column = gtk_tree_view_column_new_with_attributes ("Min IRQ handler duration (nsec) [time interval]", |
354 | renderer, |
355 | "text", MIN_IRQ_HANDLER_COLUMN, |
356 | NULL); |
357 | gtk_tree_view_column_set_alignment (column, 0.0); |
358 | gtk_tree_view_column_set_fixed_width (column, 250); |
359 | gtk_tree_view_append_column (GTK_TREE_VIEW (event_viewer_data->TreeView), column); |
360 | |
361 | renderer = gtk_cell_renderer_text_new (); |
362 | column = gtk_tree_view_column_new_with_attributes (" Average period (nsec)", |
363 | renderer, |
364 | "text", AVERAGE_PERIOD, |
365 | NULL); |
366 | gtk_tree_view_column_set_alignment (column, 0.0); |
367 | gtk_tree_view_column_set_fixed_width (column, 200); |
368 | gtk_tree_view_append_column (GTK_TREE_VIEW (event_viewer_data->TreeView), column); |
369 | |
370 | renderer = gtk_cell_renderer_text_new (); |
371 | column = gtk_tree_view_column_new_with_attributes ("Period standard deviation (nsec)", |
372 | renderer, |
373 | "text", PERIOD_STANDARD_DEV_COLUMN, |
374 | NULL); |
375 | gtk_tree_view_column_set_alignment (column, 0.0); |
376 | gtk_tree_view_column_set_fixed_width (column, 200); |
377 | gtk_tree_view_append_column (GTK_TREE_VIEW (event_viewer_data->TreeView), column); |
378 | |
379 | renderer = gtk_cell_renderer_text_new (); |
380 | column = gtk_tree_view_column_new_with_attributes ("Frequency standard deviation (Hz)", |
381 | renderer, |
382 | "text", FREQUENCY_STANDARD_DEV_COLUMN, |
383 | NULL); |
384 | gtk_tree_view_column_set_alignment (column, 0.0); |
385 | gtk_tree_view_column_set_fixed_width (column, 200); |
386 | gtk_tree_view_append_column (GTK_TREE_VIEW (event_viewer_data->TreeView), column); |
387 | |
388 | |
389 | event_viewer_data->SelectionTree = gtk_tree_view_get_selection (GTK_TREE_VIEW (event_viewer_data->TreeView)); |
390 | gtk_tree_selection_set_mode (event_viewer_data->SelectionTree, GTK_SELECTION_SINGLE); |
391 | |
392 | gtk_container_add (GTK_CONTAINER (event_viewer_data->ScrollWindow), event_viewer_data->TreeView); |
393 | |
394 | event_viewer_data->Hbox = gtk_hbox_new(0, 0); |
395 | gtk_box_pack_start(GTK_BOX(event_viewer_data->Hbox), event_viewer_data->ScrollWindow, TRUE, TRUE, 0); |
396 | |
397 | gtk_widget_show(event_viewer_data->Hbox); |
398 | gtk_widget_show(event_viewer_data->TreeView); |
399 | |
400 | interrupt_data_list = g_slist_append(interrupt_data_list, event_viewer_data); |
401 | /* Registration for time notification */ |
402 | lttvwindow_register_time_window_notify(tab, |
403 | interrupt_update_time_window, |
404 | event_viewer_data); |
405 | |
406 | g_object_set_data_full(G_OBJECT(event_viewer_data->Hbox), |
407 | "event_data", |
408 | event_viewer_data, |
409 | (GDestroyNotify) InterruptFree); |
410 | |
411 | FirstRequest(event_viewer_data ); |
412 | return event_viewer_data; |
413 | } |
414 | |
415 | |
416 | /** |
417 | * |
418 | * For each trace in the traceset, this function: |
419 | * - registers a callback function to each hook |
420 | * - calls lttv_trace_find_hook() registers a hook function to event_by_id_hooks |
421 | * - calls lttvwindow_events_request() to request data in a specific |
422 | * time interval to the main window |
423 | * |
424 | */ |
425 | static void FirstRequest(InterruptEventData *event_data ) |
426 | { |
427 | guint i, k, l, nb_trace; |
428 | |
429 | LttvTraceHook *hook; |
430 | |
431 | guint ret; |
432 | |
433 | LttvTraceState *ts; |
434 | |
435 | GArray *hooks; |
436 | |
437 | EventsRequest *events_request; |
438 | |
439 | LttvTraceHookByFacility *thf; |
440 | |
441 | LttvTracesetContext *tsc = lttvwindow_get_traceset_context(event_data->tab); |
442 | |
443 | |
444 | /* Get the traceset */ |
445 | LttvTraceset *traceset = tsc->ts; |
446 | |
447 | nb_trace = lttv_traceset_number(traceset); |
448 | |
449 | /* There are many traces in a traceset. Iteration for each trace. */ |
450 | //for(i = 0; i<MIN(TRACE_NUMBER+1, nb_trace);i++) { |
451 | for(i = 0 ; i < nb_trace ; i++) { |
452 | events_request = g_new(EventsRequest, 1); |
453 | |
454 | hooks = g_array_new(FALSE, FALSE, sizeof(LttvTraceHook)); |
455 | |
456 | hooks = g_array_set_size(hooks, 2); |
457 | |
458 | event_data->hooks_trace_before = lttv_hooks_new(); |
459 | |
460 | /* Registers a hook function */ |
461 | lttv_hooks_add(event_data->hooks_trace_before, trace_header, event_data, LTTV_PRIO_DEFAULT); |
462 | |
463 | event_data->hooks_trace_after = lttv_hooks_new(); |
464 | |
465 | /* Registers a hook function */ |
466 | lttv_hooks_add(event_data->hooks_trace_after, SecondRequest, event_data, LTTV_PRIO_DEFAULT); |
467 | /* Get a trace state */ |
468 | ts = (LttvTraceState *)tsc->traces[i]; |
469 | /* Create event_by_Id hooks */ |
470 | event_data->event_by_id_hooks = lttv_hooks_by_id_new(); |
471 | |
472 | /*Register event_by_id_hooks with a callback function*/ |
473 | ret = lttv_trace_find_hook(ts->parent.t, |
474 | LTT_FACILITY_KERNEL, LTT_EVENT_IRQ_ENTRY, |
475 | LTT_FIELD_IRQ_ID, 0, 0, |
476 | FirstRequestIrqEntryCallback, |
477 | events_request, |
478 | &g_array_index(hooks, LttvTraceHook, 0)); |
479 | |
480 | ret = lttv_trace_find_hook(ts->parent.t, |
481 | LTT_FACILITY_KERNEL, LTT_EVENT_IRQ_EXIT, |
482 | LTT_FIELD_IRQ_ID, 0, 0, |
483 | FirstRequestIrqExitCallback, |
484 | events_request, |
485 | &g_array_index(hooks, LttvTraceHook, 1)); |
486 | |
487 | g_assert(!ret); |
488 | /*iterate through the facility list*/ |
489 | for(k = 0 ; k < hooks->len; k++) |
490 | { |
491 | hook = &g_array_index(hooks, LttvTraceHook, k); |
492 | for(l=0; l<hook->fac_list->len; l++) |
493 | { |
494 | thf = g_array_index(hook->fac_list, LttvTraceHookByFacility*, l); |
495 | lttv_hooks_add(lttv_hooks_by_id_find(event_data->event_by_id_hooks, thf->id), |
496 | thf->h, |
497 | event_data, |
498 | LTTV_PRIO_DEFAULT); |
499 | |
500 | } |
501 | } |
502 | /* Initalize the EventsRequest structure */ |
503 | events_request->owner = event_data; |
504 | events_request->viewer_data = event_data; |
505 | events_request->servicing = FALSE; |
506 | events_request->start_time = event_data->time_window.start_time; |
507 | events_request->start_position = NULL; |
508 | events_request->stop_flag = FALSE; |
509 | events_request->end_time = event_data->time_window.end_time; |
510 | events_request->num_events = G_MAXUINT; |
511 | events_request->end_position = NULL; |
512 | events_request->trace = i; |
513 | |
514 | events_request->hooks = hooks; |
515 | |
516 | events_request->before_chunk_traceset = NULL; |
517 | events_request->before_chunk_trace = event_data->hooks_trace_before; |
518 | events_request->before_chunk_tracefile= NULL; |
519 | events_request->event = NULL; |
520 | events_request->event_by_id = event_data->event_by_id_hooks; |
521 | events_request->after_chunk_tracefile = NULL; |
522 | events_request->after_chunk_trace = NULL; |
523 | events_request->after_chunk_traceset = NULL; |
524 | events_request->before_request = NULL; |
525 | events_request->after_request = event_data->hooks_trace_after; |
526 | |
527 | lttvwindow_events_request(event_data->tab, events_request); |
528 | } |
529 | |
530 | } |
531 | |
532 | /** |
533 | * This function is called whenever an irq_entry event occurs. |
534 | * |
535 | */ |
536 | static gboolean FirstRequestIrqEntryCallback(void *hook_data, void *call_data) |
537 | { |
538 | |
539 | LttTime event_time; |
540 | unsigned cpu_id; |
541 | irq_entry entry; |
542 | LttvTracefileContext *tfc = (LttvTracefileContext *)call_data; |
543 | LttvTracefileState *tfs = (LttvTracefileState *)call_data; |
544 | InterruptEventData *event_data = (InterruptEventData *)hook_data; |
545 | GArray* FirstRequestIrqEntry = event_data->FirstRequestIrqEntry; |
546 | LttEvent *e = ltt_tracefile_get_event(tfc->tf); |
547 | event_time = ltt_event_time(e); |
548 | cpu_id = ltt_event_cpu_id(e); |
549 | |
550 | |
551 | entry.id =get_interrupt_id(e); |
552 | entry.cpu_id = cpu_id; |
553 | entry.event_time = event_time; |
554 | g_array_append_val (FirstRequestIrqEntry, entry); |
555 | |
556 | return FALSE; |
557 | } |
558 | |
559 | /** |
560 | * This function gets the id of the interrupt. The id is stored in a dynamic structure. |
561 | * Refer to the print.c file for how to extract data from a dynamic structure. |
562 | */ |
563 | static guint64 get_interrupt_id(LttEvent *e) |
564 | { |
565 | guint i, num_fields; |
566 | LttEventType *event_type; |
567 | LttField *element; |
568 | LttField *field; |
569 | guint64 irq_id; |
570 | event_type = ltt_event_eventtype(e); |
571 | num_fields = ltt_eventtype_num_fields(event_type); |
572 | for(i = 0 ; i < num_fields-1 ; i++) |
573 | { |
574 | field = ltt_eventtype_field(event_type, i); |
575 | irq_id = ltt_event_get_long_unsigned(e,field); |
576 | } |
577 | return irq_id; |
578 | |
579 | } |
580 | /** |
581 | * This function is called whenever an irq_exit event occurs. |
582 | * |
583 | */ |
584 | gboolean FirstRequestIrqExitCallback(void *hook_data, void *call_data) |
585 | { |
586 | LttTime event_time; |
587 | unsigned cpu_id; |
588 | LttvTracefileContext *tfc = (LttvTracefileContext *)call_data; |
589 | LttvTracefileState *tfs = (LttvTracefileState *)call_data; |
590 | InterruptEventData *event_data = (InterruptEventData *)hook_data; |
591 | LttEvent *e = ltt_tracefile_get_event(tfc->tf); |
592 | LttEventType *type = ltt_event_eventtype(e); |
593 | event_time = ltt_event_time(e); |
594 | cpu_id = ltt_event_cpu_id(e); |
595 | |
596 | CalculateData( event_time, cpu_id, event_data); |
597 | |
598 | return FALSE; |
599 | } |
600 | |
601 | /** |
602 | * This function calculates the duration of an interrupt. |
603 | * |
604 | */ |
605 | static void CalculateData(LttTime time_exit, guint cpu_id,InterruptEventData *event_data) |
606 | { |
607 | |
608 | gint i, irq_id; |
609 | irq_entry *element; |
610 | LttTime duration; |
611 | GArray *FirstRequestIrqExit = event_data->FirstRequestIrqExit; |
612 | GArray *FirstRequestIrqEntry = event_data->FirstRequestIrqEntry; |
613 | for(i = 0; i < FirstRequestIrqEntry->len; i++) |
614 | { |
615 | element = &g_array_index(FirstRequestIrqEntry,irq_entry,i); |
616 | if(element->cpu_id == cpu_id) |
617 | { |
618 | CalculateTotalDurationAndMaxIrqDurationAndMinIrqDuration(element,time_exit, FirstRequestIrqExit); |
619 | g_array_remove_index(FirstRequestIrqEntry, i); |
620 | break; |
621 | } |
622 | } |
623 | } |
624 | |
625 | |
626 | /** |
627 | * This function calculates the total duration of an interrupt and the longest & shortest Irq handlers. |
628 | * |
629 | */ |
630 | static void CalculateTotalDurationAndMaxIrqDurationAndMinIrqDuration(irq_entry *e, LttTime time_exit, GArray *FirstRequestIrqExit) |
631 | { |
632 | Irq irq; |
633 | Irq *element; |
634 | guint i; |
635 | LttTime duration; |
636 | gboolean notFound = FALSE; |
637 | memset ((void*)&irq, 0,sizeof(Irq)); |
638 | |
639 | /*first time*/ |
640 | if(FirstRequestIrqExit->len == NO_ITEMS) |
641 | { |
642 | irq.cpu_id = e->cpu_id; |
643 | irq.id = e->id; |
644 | irq.TotalNumberOfInterrupts++; |
645 | irq.total_duration = ltt_time_sub(time_exit, e->event_time); |
646 | |
647 | irq.max_irq_handler.start_time = e->event_time; |
648 | irq.max_irq_handler.end_time = time_exit; |
649 | irq.max_irq_handler.duration = ltt_time_sub(time_exit, e->event_time); |
650 | |
651 | irq.min_irq_handler.start_time = e->event_time; |
652 | irq.min_irq_handler.end_time = time_exit; |
653 | irq.min_irq_handler.duration = ltt_time_sub(time_exit, e->event_time); |
654 | |
655 | g_array_append_val (FirstRequestIrqExit, irq); |
656 | } |
657 | else |
658 | { |
659 | for(i = 0; i < FirstRequestIrqExit->len; i++) |
660 | { |
661 | element = &g_array_index(FirstRequestIrqExit,Irq,i); |
662 | if(element->id == e->id) |
663 | { |
664 | notFound = TRUE; |
665 | duration = ltt_time_sub(time_exit, e->event_time); |
666 | element->total_duration = ltt_time_add(element->total_duration, duration); |
667 | element->TotalNumberOfInterrupts++; |
668 | // Max irq handler |
669 | if(ltt_time_compare(duration,element->max_irq_handler.duration) > 0) |
670 | { |
671 | element->max_irq_handler.duration = duration; |
672 | element->max_irq_handler.start_time = e->event_time; |
673 | element->max_irq_handler.end_time = time_exit; |
674 | } |
675 | // Min irq handler |
676 | if(ltt_time_compare(duration,element->min_irq_handler.duration) < 0) |
677 | { |
678 | element->min_irq_handler.duration = duration; |
679 | element->min_irq_handler.start_time = e->event_time; |
680 | element->min_irq_handler.end_time = time_exit; |
681 | } |
682 | } |
683 | } |
684 | if(!notFound) |
685 | { |
686 | irq.cpu_id = e->cpu_id; |
687 | irq.id = e->id; |
688 | irq.TotalNumberOfInterrupts++; |
689 | irq.total_duration = ltt_time_sub(time_exit, e->event_time); |
690 | // Max irq handler |
691 | irq.max_irq_handler.start_time = e->event_time; |
692 | irq.max_irq_handler.end_time = time_exit; |
693 | irq.max_irq_handler.duration = ltt_time_sub(time_exit, e->event_time); |
694 | // Min irq handler |
695 | irq.min_irq_handler.start_time = e->event_time; |
696 | irq.min_irq_handler.end_time = time_exit; |
697 | irq.min_irq_handler.duration = ltt_time_sub(time_exit, e->event_time); |
698 | |
699 | g_array_append_val (FirstRequestIrqExit, irq); |
700 | } |
701 | } |
702 | } |
703 | |
704 | /** |
705 | * This function passes the second EventsRequest to LTTV |
706 | * |
707 | */ |
708 | static gboolean SecondRequest(void *hook_data, void *call_data) |
709 | { |
710 | |
711 | guint i, k, l, nb_trace; |
712 | |
713 | LttvTraceHook *hook; |
714 | |
715 | guint ret; |
716 | |
717 | LttvTraceState *ts; |
718 | |
719 | GArray *hooks; |
720 | |
721 | EventsRequest *events_request; |
722 | |
723 | LttvTraceHookByFacility *thf; |
724 | |
725 | InterruptEventData *event_data = (InterruptEventData *)hook_data; |
726 | |
727 | LttvTracesetContext *tsc = lttvwindow_get_traceset_context(event_data->tab); |
728 | |
729 | CalculateAverageDurationForEachIrqId(event_data); |
730 | |
731 | /* Get the traceset */ |
732 | LttvTraceset *traceset = tsc->ts; |
733 | |
734 | nb_trace = lttv_traceset_number(traceset); |
735 | |
736 | /* There are many traces in a traceset. Iteration for each trace. */ |
737 | for(i = 0 ; i < nb_trace ; i++) { |
738 | // fixed for(i = 0; i<MIN(TRACE_NUMBER+1, nb_trace);i++) { |
739 | events_request = g_new(EventsRequest, 1); |
740 | |
741 | hooks = g_array_new(FALSE, FALSE, sizeof(LttvTraceHook)); |
742 | |
743 | hooks = g_array_set_size(hooks, 2); |
744 | |
745 | event_data->hooks_trace_after = lttv_hooks_new(); |
746 | |
747 | /* Registers a hook function */ |
748 | lttv_hooks_add(event_data->hooks_trace_after, DisplayViewer, event_data, LTTV_PRIO_DEFAULT); |
749 | |
750 | /* Get a trace state */ |
751 | ts = (LttvTraceState *)tsc->traces[i]; |
752 | /* Create event_by_Id hooks */ |
753 | event_data->event_by_id_hooks = lttv_hooks_by_id_new(); |
754 | |
755 | /*Register event_by_id_hooks with a callback function*/ |
756 | ret = lttv_trace_find_hook(ts->parent.t, |
757 | LTT_FACILITY_KERNEL, LTT_EVENT_IRQ_ENTRY, |
758 | LTT_FIELD_IRQ_ID, 0, 0, |
759 | SecondRequestIrqEntryCallback, |
760 | events_request, |
761 | &g_array_index(hooks, LttvTraceHook, 0)); |
762 | |
763 | ret = lttv_trace_find_hook(ts->parent.t, |
764 | LTT_FACILITY_KERNEL, LTT_EVENT_IRQ_EXIT, |
765 | LTT_FIELD_IRQ_ID, 0, 0, |
766 | SecondRequestIrqExitCallback, |
767 | events_request, |
768 | &g_array_index(hooks, LttvTraceHook, 1)); |
769 | |
770 | g_assert(!ret); |
771 | |
772 | /* iterate through the facility list */ |
773 | for(k = 0 ; k < hooks->len; k++) |
774 | { |
775 | hook = &g_array_index(hooks, LttvTraceHook, k); |
776 | for(l=0; l<hook->fac_list->len; l++) |
777 | { |
778 | thf = g_array_index(hook->fac_list, LttvTraceHookByFacility*, l); |
779 | lttv_hooks_add(lttv_hooks_by_id_find(event_data->event_by_id_hooks, thf->id), |
780 | thf->h, |
781 | event_data, |
782 | LTTV_PRIO_DEFAULT); |
783 | |
784 | } |
785 | } |
786 | /* Initalize the EventsRequest structure */ |
787 | events_request->owner = event_data; |
788 | events_request->viewer_data = event_data; |
789 | events_request->servicing = FALSE; |
790 | events_request->start_time = event_data->time_window.start_time; |
791 | events_request->start_position = NULL; |
792 | events_request->stop_flag = FALSE; |
793 | events_request->end_time = event_data->time_window.end_time; |
794 | events_request->num_events = G_MAXUINT; |
795 | events_request->end_position = NULL; |
796 | events_request->trace = i; |
797 | |
798 | events_request->hooks = hooks; |
799 | |
800 | events_request->before_chunk_traceset = NULL; |
801 | events_request->before_chunk_trace = NULL; |
802 | events_request->before_chunk_tracefile= NULL; |
803 | events_request->event = NULL; |
804 | events_request->event_by_id = event_data->event_by_id_hooks; |
805 | events_request->after_chunk_tracefile = NULL; |
806 | events_request->after_chunk_trace = NULL; |
807 | events_request->after_chunk_traceset = NULL; |
808 | events_request->before_request = NULL; |
809 | events_request->after_request = event_data->hooks_trace_after; |
810 | |
811 | lttvwindow_events_request(event_data->tab, events_request); |
812 | } |
813 | return FALSE; |
814 | } |
815 | |
816 | /** |
817 | * This function calculates the average duration for each Irq Id |
818 | * |
819 | */ |
820 | static void CalculateAverageDurationForEachIrqId(InterruptEventData *event_data) |
821 | { |
822 | guint64 real_data; |
823 | Irq *element; |
824 | gint i; |
825 | GArray* FirstRequestIrqExit = event_data->FirstRequestIrqExit; |
826 | for(i = 0; i < FirstRequestIrqExit->len; i++) |
827 | { |
828 | element = &g_array_index(FirstRequestIrqExit,Irq,i); |
829 | real_data = element->total_duration.tv_sec; |
830 | real_data *= NANOSECONDS_PER_SECOND; |
831 | real_data += element->total_duration.tv_nsec; |
832 | if(element->TotalNumberOfInterrupts != 0) |
833 | element->average_duration = real_data / element->TotalNumberOfInterrupts; |
834 | else |
835 | element->average_duration = 0; |
836 | } |
837 | |
838 | } |
839 | |
840 | /** |
841 | * This function is called whenever an irq_entry event occurs. Use in the second request |
842 | * |
843 | */ |
844 | static gboolean SecondRequestIrqEntryCallback(void *hook_data, void *call_data) |
845 | { |
846 | |
847 | LttTime event_time; |
848 | unsigned cpu_id; |
849 | irq_entry entry; |
850 | LttvTracefileContext *tfc = (LttvTracefileContext *)call_data; |
851 | LttvTracefileState *tfs = (LttvTracefileState *)call_data; |
852 | InterruptEventData *event_data = (InterruptEventData *)hook_data; |
853 | GArray* SecondRequestIrqEntry = event_data->SecondRequestIrqEntry; |
854 | LttEvent *e = ltt_tracefile_get_event(tfc->tf); |
855 | event_time = ltt_event_time(e); |
856 | cpu_id = ltt_event_cpu_id(e); |
857 | |
858 | |
859 | entry.id =get_interrupt_id(e); |
860 | entry.cpu_id = cpu_id; |
861 | entry.event_time = event_time; |
862 | g_array_append_val (SecondRequestIrqEntry, entry); |
863 | |
864 | return FALSE; |
865 | } |
866 | |
867 | /** |
868 | * This function is called whenever an irq_exit event occurs in the second request. |
869 | * |
870 | */ |
871 | static gboolean SecondRequestIrqExitCallback(void *hook_data, void *call_data) |
872 | { |
873 | |
874 | LttvTracefileContext *tfc = (LttvTracefileContext *)call_data; |
875 | LttvTracefileState *tfs = (LttvTracefileState *)call_data; |
876 | InterruptEventData *event_data = (InterruptEventData *)hook_data; |
877 | LttEvent *event = ltt_tracefile_get_event(tfc->tf); |
878 | |
879 | CalculateXi(event, event_data); |
880 | return FALSE; |
881 | } |
882 | |
883 | |
884 | /** |
885 | * This function is called whenever an irq_exit event occurs in the second request. |
886 | * |
887 | */ |
888 | static void CalculateXi(LttEvent *event_irq_exit, InterruptEventData *event_data) |
889 | { |
890 | gint i, irq_id; |
891 | irq_entry *element; |
892 | LttTime Xi; |
893 | LttTime exit_time; |
894 | unsigned cpu_id; |
895 | |
896 | GArray *SecondRequestIrqExit = event_data->SecondRequestIrqExit; |
897 | GArray *SecondRequestIrqEntry = event_data->SecondRequestIrqEntry; |
898 | cpu_id = ltt_event_cpu_id(event_irq_exit); |
899 | for(i = 0; i < SecondRequestIrqEntry->len; i++) |
900 | { |
901 | element = &g_array_index(SecondRequestIrqEntry,irq_entry,i); |
902 | if(element->cpu_id == cpu_id) |
903 | { |
904 | |
905 | /* time calculation */ |
906 | exit_time = ltt_event_time(event_irq_exit); |
907 | Xi = ltt_time_sub(exit_time, element->event_time); |
908 | irq_id = element->id; |
909 | |
910 | SumItems(irq_id, Xi,event_data); |
911 | g_array_remove_index(SecondRequestIrqEntry, i); |
912 | break; |
913 | } |
914 | } |
915 | } |
916 | |
917 | |
918 | /** |
919 | * This function computes the Sum ((xi -Xa)^2) and store the result in SumArray |
920 | * |
921 | */ |
922 | static void SumItems(gint irq_id, LttTime Xi, InterruptEventData *event_data) |
923 | { |
924 | gint i; |
925 | guint Xi_in_ns; |
926 | |
927 | gint duration_inner_part; |
928 | guint64 period_inner_part; |
929 | guint64 frequency_inner_part; |
930 | |
931 | Irq *average; |
932 | SumId *sumItem; |
933 | SumId sum; |
934 | int FrequencyHZ = 0; |
935 | gboolean notFound = FALSE; |
936 | GArray *FirstRequestIrqExit = event_data->FirstRequestIrqExit; |
937 | GArray *SumArray = event_data->SumArray; |
938 | Xi_in_ns = Xi.tv_sec; |
939 | Xi_in_ns *= NANOSECONDS_PER_SECOND; |
940 | Xi_in_ns += Xi.tv_nsec; |
941 | |
942 | for(i = 0; i < FirstRequestIrqExit->len; i++) |
943 | { |
944 | average = &g_array_index(FirstRequestIrqExit,Irq,i); |
945 | if(irq_id == average->id) |
946 | { |
947 | duration_inner_part = Xi_in_ns - average->average_duration; |
948 | FrequencyHZ = FrequencyInHZ(average->TotalNumberOfInterrupts, event_data->time_window); |
949 | sum.irqId = irq_id; |
950 | // compute (xi -Xa)^2 of the duration Standard deviation |
951 | sum.TotalNumberOfInterrupts = average->TotalNumberOfInterrupts; |
952 | sum.sumOfDurations = pow (duration_inner_part , 2); |
953 | |
954 | // compute (xi -Xa)^2 of the period Standard deviation |
955 | period_inner_part = CalculatePeriodInnerPart(Xi_in_ns, FrequencyHZ); |
956 | |
957 | // compute (xi -Xa)^2 of the frequency Standard deviation |
958 | frequency_inner_part = CalculateFrequencyInnerPart(Xi_in_ns, FrequencyHZ); |
959 | |
960 | sum.sumOfPeriods = period_inner_part; |
961 | |
962 | sum.sumOfFrequencies = frequency_inner_part; |
963 | |
964 | if(event_data->SumArray->len == NO_ITEMS) |
965 | { |
966 | g_array_append_val (SumArray, sum); |
967 | } |
968 | else |
969 | { |
970 | for(i = 0; i < SumArray->len; i++) |
971 | { |
972 | sumItem = &g_array_index(SumArray, SumId, i); |
973 | if(sumItem->irqId == irq_id) |
974 | { |
975 | notFound = TRUE; |
976 | sumItem->sumOfDurations += sum.sumOfDurations; |
977 | sumItem->sumOfPeriods += sum.sumOfPeriods; |
978 | sumItem->sumOfFrequencies += sum.sumOfFrequencies; |
979 | } |
980 | } |
981 | if(!notFound) |
982 | { |
983 | g_array_append_val (SumArray, sum); |
984 | } |
985 | |
986 | } |
987 | |
988 | } |
989 | } |
990 | } |
991 | |
992 | /** |
993 | * This function computes the inner part of the period standard deviation = sqrt(1/N Sum ((xi -Xa)^2)) |
994 | * The inner part is: (xi -Xa)^2 |
995 | */ |
996 | static guint64 CalculatePeriodInnerPart(guint Xi, guint FrequencyHZ) |
997 | { |
998 | |
999 | double periodInSec; /*period in sec*/ |
1000 | int periodInNSec; |
1001 | gint difference; |
1002 | guint64 result; |
1003 | periodInSec = (double)1/FrequencyHZ; |
1004 | periodInSec *= NANOSECONDS_PER_SECOND; |
1005 | periodInNSec = (int)periodInSec; |
1006 | |
1007 | difference = Xi - periodInNSec; |
1008 | result = pow (difference , 2); |
1009 | return result; |
1010 | } |
1011 | |
1012 | /** |
1013 | * This function computes the inner part of the frequency standard deviation = sqrt(1/N Sum ((xi -Xa)^2)) |
1014 | * The inner part is: (xi -Xa)^2 |
1015 | */ |
1016 | static guint64 CalculateFrequencyInnerPart(guint Xi_in_ns, guint FrequencyHZ) |
1017 | { |
1018 | guint64 result; |
1019 | gint difference; |
1020 | |
1021 | difference = Xi_in_ns - FrequencyHZ; |
1022 | result = pow (difference , 2); |
1023 | return result; |
1024 | } |
1025 | /** |
1026 | * This function displays the result on the viewer |
1027 | * |
1028 | */ |
1029 | static gboolean DisplayViewer(void *hook_data, void *call_data) |
1030 | { |
1031 | |
1032 | guint average; |
1033 | gint i; |
1034 | Irq element; |
1035 | LttTime average_duration; |
1036 | GtkTreeIter iter; |
1037 | guint64 real_data; |
1038 | guint maxIRQduration; |
1039 | guint minIRQduration; |
1040 | double periodInSec; |
1041 | int periodInNsec; |
1042 | char maxIrqHandler[80]; |
1043 | char minIrqHandler[80]; |
1044 | InterruptEventData *event_data = (InterruptEventData *)hook_data; |
1045 | GArray *FirstRequestIrqExit = event_data->FirstRequestIrqExit; |
1046 | int FrequencyHZ = 0; |
1047 | periodInSec = 0; |
1048 | gtk_list_store_clear(event_data->ListStore); |
1049 | for(i = 0; i < FirstRequestIrqExit->len; i++) |
1050 | { |
1051 | element = g_array_index(FirstRequestIrqExit,Irq,i); |
1052 | real_data = element.total_duration.tv_sec; |
1053 | real_data *= NANOSECONDS_PER_SECOND; |
1054 | real_data += element.total_duration.tv_nsec; |
1055 | |
1056 | |
1057 | maxIRQduration = element.max_irq_handler.duration.tv_sec; |
1058 | maxIRQduration *= NANOSECONDS_PER_SECOND; |
1059 | maxIRQduration += element.max_irq_handler.duration.tv_nsec; |
1060 | |
1061 | sprintf(maxIrqHandler, "%d [%d.%d - %d.%d]",maxIRQduration, element.max_irq_handler.start_time.tv_sec, \ |
1062 | element.max_irq_handler.start_time.tv_nsec, element.max_irq_handler.end_time.tv_sec, \ |
1063 | element.max_irq_handler.end_time.tv_nsec) ; |
1064 | |
1065 | minIRQduration = element.min_irq_handler.duration.tv_sec; |
1066 | minIRQduration *= NANOSECONDS_PER_SECOND; |
1067 | minIRQduration += element.min_irq_handler.duration.tv_nsec; |
1068 | sprintf(minIrqHandler, "%d [%d.%d - %d.%d]",minIRQduration, element.min_irq_handler.start_time.tv_sec, \ |
1069 | element.min_irq_handler.start_time.tv_nsec, element.min_irq_handler.end_time.tv_sec, \ |
1070 | element.min_irq_handler.end_time.tv_nsec) ; |
1071 | |
1072 | |
1073 | FrequencyHZ = FrequencyInHZ(element.TotalNumberOfInterrupts,event_data->time_window); |
1074 | |
1075 | if(FrequencyHZ != 0) |
1076 | { |
1077 | periodInSec = (double)1/FrequencyHZ; |
1078 | periodInSec *= NANOSECONDS_PER_SECOND; |
1079 | periodInNsec = (int)periodInSec; |
1080 | |
1081 | } |
1082 | |
1083 | gtk_list_store_append (event_data->ListStore, &iter); |
1084 | gtk_list_store_set (event_data->ListStore, &iter, |
1085 | CPUID_COLUMN, element.cpu_id, |
1086 | IRQ_ID_COLUMN, element.id, |
1087 | FREQUENCY_COLUMN, FrequencyHZ, |
1088 | DURATION_COLUMN, real_data, |
1089 | DURATION_STANDARD_DEV_COLUMN, CalculateDurationStandardDeviation(element.id, event_data), |
1090 | MAX_IRQ_HANDLER_COLUMN, maxIrqHandler, |
1091 | MIN_IRQ_HANDLER_COLUMN, minIrqHandler, |
1092 | AVERAGE_PERIOD , periodInNsec, |
1093 | PERIOD_STANDARD_DEV_COLUMN, CalculatePeriodStandardDeviation(element.id, event_data), |
1094 | FREQUENCY_STANDARD_DEV_COLUMN, CalculateFrequencyStandardDeviation(element.id, event_data), |
1095 | -1); |
1096 | } |
1097 | |
1098 | |
1099 | if(event_data->FirstRequestIrqExit->len) |
1100 | { |
1101 | g_array_remove_range (event_data->FirstRequestIrqExit,0,event_data->FirstRequestIrqExit->len); |
1102 | } |
1103 | |
1104 | if(event_data->FirstRequestIrqEntry->len) |
1105 | { |
1106 | g_array_remove_range (event_data->FirstRequestIrqEntry,0,event_data->FirstRequestIrqEntry->len); |
1107 | } |
1108 | |
1109 | if(event_data->SecondRequestIrqEntry->len) |
1110 | { |
1111 | g_array_remove_range (event_data->SecondRequestIrqEntry,0,event_data->SecondRequestIrqEntry->len); |
1112 | } |
1113 | |
1114 | if(event_data->SecondRequestIrqExit->len) |
1115 | { |
1116 | g_array_remove_range (event_data->SecondRequestIrqExit,0, event_data->SecondRequestIrqExit->len); |
1117 | } |
1118 | |
1119 | if(event_data->SumArray->len) |
1120 | { |
1121 | g_array_remove_range (event_data->SumArray,0, event_data->SumArray->len); |
1122 | } |
1123 | |
1124 | return FALSE; |
1125 | } |
1126 | |
1127 | |
1128 | /** |
1129 | * This function converts the number of interrupts over a time window to |
1130 | * frequency in HZ |
1131 | */ |
1132 | static int FrequencyInHZ(gint NumerofInterruptions, TimeWindow time_window) |
1133 | { |
1134 | guint64 frequencyHz = 0; |
1135 | double timeSec; // time in second |
1136 | double result; |
1137 | result = ltt_time_to_double(time_window.time_width); |
1138 | timeSec = (result/NANOSECONDS_PER_SECOND); //time in second |
1139 | frequencyHz = NumerofInterruptions / timeSec; |
1140 | return frequencyHz; |
1141 | } |
1142 | |
1143 | /** |
1144 | * This function calculates the duration standard deviation |
1145 | * Duration standard deviation = sqrt(1/N Sum ((xi -Xa)^2)) |
1146 | * Where: |
1147 | * sumId.sumOfDurations -> Sum ((xi -Xa)^2) |
1148 | * inner_component -> 1/N Sum ((xi -Xa)^2) |
1149 | * deviation-> sqrt(1/N Sum ((xi -Xa)^2)) |
1150 | */ |
1151 | static int CalculateDurationStandardDeviation(gint id, InterruptEventData *event_data) |
1152 | { |
1153 | int i; |
1154 | SumId sumId; |
1155 | double inner_component; |
1156 | int deviation = 0; |
1157 | for(i = 0; i < event_data->SumArray->len; i++) |
1158 | { |
1159 | sumId = g_array_index(event_data->SumArray, SumId, i); |
1160 | if(id == sumId.irqId) |
1161 | { |
1162 | if(sumId.TotalNumberOfInterrupts != 0) |
1163 | inner_component = sumId.sumOfDurations/ sumId.TotalNumberOfInterrupts; |
1164 | else |
1165 | inner_component = 0.0; |
1166 | deviation = sqrt(inner_component); |
1167 | return deviation; |
1168 | } |
1169 | } |
1170 | return deviation; |
1171 | } |
1172 | |
1173 | |
1174 | /** |
1175 | * This function calculates the period standard deviation |
1176 | * Period standard deviation = sqrt(1/N Sum ((xi -Xa)^2)) |
1177 | * Where: |
1178 | * sumId.sumOfPeriods -> Sum ((xi -Xa)^2) |
1179 | * inner_component -> 1/N Sum ((xi -Xa)^2) |
1180 | * period_standard_deviation-> sqrt(1/N Sum ((xi -Xa)^2)) |
1181 | |
1182 | * |
1183 | */ |
1184 | static int CalculatePeriodStandardDeviation(gint id, InterruptEventData *event_data) |
1185 | { |
1186 | int i; |
1187 | SumId sumId; |
1188 | guint64 inner_component; |
1189 | guint64 period_standard_deviation = 0; |
1190 | |
1191 | for(i = 0; i < event_data->SumArray->len; i++) |
1192 | { |
1193 | sumId = g_array_index(event_data->SumArray, SumId, i); |
1194 | if(id == sumId.irqId) |
1195 | { |
1196 | if(sumId.TotalNumberOfInterrupts != 0) |
1197 | inner_component = sumId.sumOfPeriods / sumId.TotalNumberOfInterrupts; |
1198 | else |
1199 | inner_component = 0; |
1200 | |
1201 | period_standard_deviation = sqrt(inner_component); |
1202 | } |
1203 | } |
1204 | |
1205 | return period_standard_deviation; |
1206 | } |
1207 | |
1208 | /** |
1209 | * This function calculates the frequency standard deviation |
1210 | * Frequency standard deviation = sqrt(1/N Sum ((xi -Xa)^2)) |
1211 | * Where: |
1212 | * sumId.sumOfFrequencies -> Sum ((xi -Xa)^2) |
1213 | * inner_component -> 1/N Sum ((xi -Xa)^2) |
1214 | * frequency_standard_deviation-> sqrt(1/N Sum ((xi -Xa)^2)) |
1215 | * |
1216 | */ |
1217 | static int CalculateFrequencyStandardDeviation(gint id, InterruptEventData *event_data) |
1218 | { |
1219 | int i; |
1220 | SumId sumId; |
1221 | guint64 inner_component; |
1222 | guint64 frequency_standard_deviation = 0; |
1223 | for(i = 0; i < event_data->SumArray->len; i++) |
1224 | { |
1225 | sumId = g_array_index(event_data->SumArray, SumId, i); |
1226 | if(id == sumId.irqId) |
1227 | { |
1228 | if(sumId.TotalNumberOfInterrupts != 0) |
1229 | inner_component = sumId.sumOfFrequencies / sumId.TotalNumberOfInterrupts; |
1230 | else |
1231 | inner_component = 0; |
1232 | |
1233 | frequency_standard_deviation = sqrt(inner_component); |
1234 | } |
1235 | } |
1236 | return frequency_standard_deviation; |
1237 | } |
1238 | |
1239 | /* |
1240 | * This function is called by the main window |
1241 | * when the time interval needs to be updated. |
1242 | **/ |
1243 | gboolean interrupt_update_time_window(void * hook_data, void * call_data) |
1244 | { |
1245 | InterruptEventData *event_data = (InterruptEventData *) hook_data; |
1246 | const TimeWindowNotifyData *time_window_nofify_data = ((const TimeWindowNotifyData *)call_data); |
1247 | event_data->time_window = *time_window_nofify_data->new_time_window; |
1248 | g_info("interrupts: interrupt_update_time_window()\n"); |
1249 | Tab *tab = event_data->tab; |
1250 | lttvwindow_events_request_remove_all(tab, event_data); |
1251 | FirstRequest(event_data ); |
1252 | return FALSE; |
1253 | } |
1254 | |
1255 | |
1256 | gboolean trace_header(void *hook_data, void *call_data) |
1257 | { |
1258 | |
1259 | InterruptEventData *event_data = (InterruptEventData *)hook_data; |
1260 | LttvTracefileContext *tfc = (LttvTracefileContext *)call_data; |
1261 | LttEvent *e; |
1262 | LttTime event_time; |
1263 | return FALSE; |
1264 | } |
1265 | |
1266 | void interrupt_destroy_walk(gpointer data, gpointer user_data) |
1267 | { |
1268 | g_info("interrupt_destroy_walk"); |
1269 | InterruptEventData *event_data = (InterruptEventData*) data; |
1270 | interrupt_destructor((InterruptEventData*)data); |
1271 | } |
1272 | |
1273 | |
1274 | void interrupt_destructor(InterruptEventData *event_viewer_data) |
1275 | { |
1276 | /* May already been done by GTK window closing */ |
1277 | g_info("enter interrupt_destructor \n"); |
1278 | if(GTK_IS_WIDGET(event_viewer_data->Hbox)) |
1279 | { |
1280 | gtk_widget_destroy(event_viewer_data->Hbox); |
1281 | } |
1282 | } |
1283 | |
1284 | /** |
1285 | This function is called when the viewer is destroyed to free hooks and memory |
1286 | */ |
1287 | static void InterruptFree(InterruptEventData *event_viewer_data) |
1288 | { |
1289 | Tab *tab = event_viewer_data->tab; |
1290 | if(tab != NULL) |
1291 | { |
1292 | |
1293 | g_array_free(event_viewer_data->FirstRequestIrqExit, TRUE); |
1294 | g_array_free(event_viewer_data->FirstRequestIrqEntry, TRUE); |
1295 | g_array_free(event_viewer_data->SecondRequestIrqEntry, TRUE); |
1296 | g_array_free(event_viewer_data->SecondRequestIrqExit, TRUE); |
1297 | g_array_free(event_viewer_data->SumArray, TRUE); |
1298 | |
1299 | lttvwindow_unregister_time_window_notify(tab, interrupt_update_time_window, event_viewer_data); |
1300 | |
1301 | lttvwindow_events_request_remove_all(event_viewer_data->tab, |
1302 | event_viewer_data); |
1303 | |
1304 | interrupt_data_list = g_slist_remove(interrupt_data_list, event_viewer_data); |
1305 | |
1306 | } |
1307 | |
1308 | } |
1309 | |
1310 | /** |
1311 | * plugin's destroy function |
1312 | * |
1313 | * This function releases the memory reserved by the module and unregisters |
1314 | * everything that has been registered in the gtkTraceSet API. |
1315 | */ |
1316 | static void destroy() |
1317 | { |
1318 | |
1319 | g_info("Destroy interrupts"); |
1320 | g_slist_foreach(interrupt_data_list, interrupt_destroy_walk, NULL ); |
1321 | g_slist_free(interrupt_data_list); |
1322 | lttvwindow_unregister_constructor(interrupts); |
1323 | |
1324 | } |
1325 | |
1326 | LTTV_MODULE("interrupts", "interrupts info view", \ |
1327 | "Graphical module to display interrupts performance", \ |
1328 | init, destroy, "lttvwindow") |