X-Git-Url: http://git.lttng.org./?a=blobdiff_plain;f=ltt%2Fbranches%2Fpoly%2Flttv%2Fmodules%2Fgui%2Finterrupts%2Finterrupts.c;h=2818875f650edc6553354be2bb7ef0db7994c6a9;hb=8eddb7504fe51321ac56a0de6d5a82f7a94a5feb;hp=fd3ad580c2a33856a5ac9af236f1141514a1ae34;hpb=fc77fe59a3bbab809fd33d7e12441d92bcce8c38;p=lttv.git diff --git a/ltt/branches/poly/lttv/modules/gui/interrupts/interrupts.c b/ltt/branches/poly/lttv/modules/gui/interrupts/interrupts.c index fd3ad580..2818875f 100644 --- a/ltt/branches/poly/lttv/modules/gui/interrupts/interrupts.c +++ b/ltt/branches/poly/lttv/modules/gui/interrupts/interrupts.c @@ -17,47 +17,49 @@ */ /****************************************************************** - - The standard deviation calculation is based on: - http://en.wikipedia.org/wiki/Standard_deviation - - Standard_deviation = sqrt(1/N Sum ((xi -Xa)^2)) - - To compute the standard deviation, we need to make EventRequests to LTTV. In - the first EventRequest, we compute the average duration (Xa) and the - frequency (N) of each IrqID. We store the information calculated in the first - EventRequest in an array called FirstRequestIrqExit. - In the second EventRequest, we compute the Sum ((xi -Xa)^2) and store this information - in a array called SumArray. The function CalculateDurationStandardDeviation() uses FirstRequestIrqExit - and SumArray arrays to calculate the standard deviation. - - -CPUID: processor ID +Each field of the interrupt viewer is summarized as follows: + +- CPUID: processor ID + +- IrqId: IRQ ID + +- Frequency (Hz): the number of interrupts per second (Hz). + We compute the total number of interrupts. Then + we divide it by the time interval. + +- Total Duration (nsec): the sum of each interrupt duration in nsec. + For a given Irq ID, we sum the duration of each interrupt + to give us the total duration + +- Duration Standard_deviation = sqrt(1/N Sum ((xi -Xa)^2)) where + N: number of interrupts + xi: duration of an interrupt (nsec) + Xa: average duration (nsec) + The formula is taken from wikipedia: http://en.wikipedia.org/wiki/Standard_deviation. + To calculate the duration standard deviation, we make two EventsRequest passes to the main window. + In the first EventsRequest pass, we calculate the total number of interrupts to compute for + the average Xa. In the second EventsRequest pass, calculate the standard deviation. + -IrqId: IRQ ID +- Max IRQ handler duration (nsec) [time interval]: the longest IRQ handler duration in nsec. -Frequency (Hz): the number of interruptions per second (Hz) +- Min IRQ handler duration (nsec) [time interval]: the shortest IRQ handler duration in nsec. -Total Duration (nsec): the sum of each interrupt duration in nsec +- Average period (nsec): 1/Frequency(in HZ). The frequency is computed above. -Duration standard deviation (nsec): taken from http://en.wikipedia.org/wiki/Standard_deviation -Duration Standard_deviation = sqrt(1/N Sum ((xi -Xa)^2)) where -N: number of interrupts -xi: duration of an interrupt (nsec) -Xa: average duration (nsec) - -Max IRQ handler duration (nsec) [time interval]: the longest IRQ handler duration in nsec. - -Average period (nsec): 1/frequency - - -Period Standard_deviation = sqrt(1/N Sum ((xi -Xa)^2)) where +-Period Standard_deviation = sqrt(1/N Sum ((xi -Xa)^2)) where N: number of interrupts xi: duration of an interrupt -Xa: 1/frequency +Xa: Period = 1/Frequency (in Hz) - *******************************************************************/ +-Frequency Standard_deviation = sqrt(1/N Sum ((xi -Xa)^2)) +N: number of interrupts +xi: duration of an interrupt +Xa: Frequency (Hz) + + +*******************************************************************/ @@ -93,16 +95,16 @@ typedef struct LttTime duration; LttTime start_time; LttTime end_time; -}MaxDuration; +}IrqDuration; typedef struct { guint cpu_id; guint id; - guint frequency; + guint TotalNumberOfInterrupts; LttTime total_duration; guint average_duration; - MaxDuration max_irq_handler; - + IrqDuration max_irq_handler; + IrqDuration min_irq_handler; }Irq; typedef struct { @@ -115,9 +117,10 @@ typedef struct { typedef struct { guint irqId; - guint frequency; - guint64 sumOfDurations; - guint64 sumOfPeriods; + guint TotalNumberOfInterrupts;//frequency;// + guint64 sumOfDurations; // to store the Sum ((xi -Xa)^2) of the duration Standard deviation + guint64 sumOfPeriods; // to store the Sum ((xi -Xa)^2) of the period Standard deviation + guint64 sumOfFrequencies;// to store the Sum ((xi -Xa)^2) of the frequency Standard deviation }SumId; @@ -167,7 +170,7 @@ static guint64 get_interrupt_id(LttEvent *e); static gboolean trace_header(void *hook_data, void *call_data); static gboolean DisplayViewer (void *hook_data, void *call_data); static void CalculateData(LttTime time_exit, guint cpu_id, InterruptEventData *event_data); -static void TotalDurationMaxIrqDuration(irq_entry *e, LttTime time_exit, GArray *FirstRequestIrqExit); +static void CalculateTotalDurationAndMaxIrqDurationAndMinIrqDuration(irq_entry *e, LttTime time_exit, GArray *FirstRequestIrqExit); static gboolean FirstRequestIrqEntryCallback(void *hook_data, void *call_data); static gboolean FirstRequestIrqExitCallback(void *hook_data, void *call_data); static gboolean SecondRequest(void *hook_data, void *call_data); @@ -178,9 +181,12 @@ static void CalculateXi(LttEvent *event, InterruptEventData *event_data); static void SumItems(gint irq_id, LttTime Xi, InterruptEventData *event_data); static int CalculateDurationStandardDeviation(gint id, InterruptEventData *event_data); static int CalculatePeriodStandardDeviation(gint id, InterruptEventData *event_data); -static int FrequencyInHZ(gint frequency, TimeWindow time_window); +static int FrequencyInHZ(gint NumberOfInterruptions, TimeWindow time_window); static guint64 CalculatePeriodInnerPart(guint Xi, guint FrequencyHZ); +static guint64 CalculateFrequencyInnerPart(guint Xi_in_ns, guint FrequencyHZ); static void InterruptFree(InterruptEventData *event_viewer_data); +static int CalculateFrequencyStandardDeviation(gint id, InterruptEventData *event_data); + /* Enumeration of the columns */ enum{ CPUID_COLUMN, @@ -189,8 +195,10 @@ enum{ DURATION_COLUMN, DURATION_STANDARD_DEV_COLUMN, MAX_IRQ_HANDLER_COLUMN, + MIN_IRQ_HANDLER_COLUMN, AVERAGE_PERIOD, - PERIOD_STANDARD_DEV_COLUMN, + PERIOD_STANDARD_DEV_COLUMN, + FREQUENCY_STANDARD_DEV_COLUMN, N_COLUMNS }; @@ -271,8 +279,11 @@ InterruptEventData *system_info(Tab *tab) G_TYPE_UINT64, /* Duration */ G_TYPE_INT, /* standard deviation */ G_TYPE_STRING, /* Max IRQ handler */ + G_TYPE_STRING, /* Min IRQ handler */ G_TYPE_INT, /* Average period */ - G_TYPE_INT /* period standard deviation */ + G_TYPE_INT, /* period standard deviation */ + G_TYPE_INT /* frequency standard deviation */ + ); event_viewer_data->TreeView = gtk_tree_view_new_with_model (GTK_TREE_MODEL (event_viewer_data->ListStore)); @@ -280,7 +291,7 @@ InterruptEventData *system_info(Tab *tab) g_object_unref (G_OBJECT (event_viewer_data->ListStore)); renderer = gtk_cell_renderer_text_new (); - column = gtk_tree_view_column_new_with_attributes ("CPUID", + column = gtk_tree_view_column_new_with_attributes ("CPU ID", renderer, "text", CPUID_COLUMN, NULL); @@ -290,7 +301,7 @@ InterruptEventData *system_info(Tab *tab) renderer = gtk_cell_renderer_text_new (); - column = gtk_tree_view_column_new_with_attributes ("IrqId", + column = gtk_tree_view_column_new_with_attributes ("IRQ ID", renderer, "text", IRQ_ID_COLUMN, NULL); @@ -334,7 +345,16 @@ InterruptEventData *system_info(Tab *tab) gtk_tree_view_column_set_alignment (column, 0.0); gtk_tree_view_column_set_fixed_width (column, 250); gtk_tree_view_append_column (GTK_TREE_VIEW (event_viewer_data->TreeView), column); - + + renderer = gtk_cell_renderer_text_new (); + column = gtk_tree_view_column_new_with_attributes ("Min IRQ handler duration (nsec) [time interval]", + renderer, + "text", MIN_IRQ_HANDLER_COLUMN, + NULL); + gtk_tree_view_column_set_alignment (column, 0.0); + gtk_tree_view_column_set_fixed_width (column, 250); + gtk_tree_view_append_column (GTK_TREE_VIEW (event_viewer_data->TreeView), column); + renderer = gtk_cell_renderer_text_new (); column = gtk_tree_view_column_new_with_attributes (" Average period (nsec)", renderer, @@ -353,6 +373,14 @@ InterruptEventData *system_info(Tab *tab) gtk_tree_view_column_set_fixed_width (column, 200); gtk_tree_view_append_column (GTK_TREE_VIEW (event_viewer_data->TreeView), column); + renderer = gtk_cell_renderer_text_new (); + column = gtk_tree_view_column_new_with_attributes ("Frequency standard deviation (Hz)", + renderer, + "text", FREQUENCY_STANDARD_DEV_COLUMN, + NULL); + gtk_tree_view_column_set_alignment (column, 0.0); + gtk_tree_view_column_set_fixed_width (column, 200); + gtk_tree_view_append_column (GTK_TREE_VIEW (event_viewer_data->TreeView), column); event_viewer_data->SelectionTree = gtk_tree_view_get_selection (GTK_TREE_VIEW (event_viewer_data->TreeView)); @@ -527,7 +555,7 @@ static gboolean FirstRequestIrqEntryCallback(void *hook_data, void *call_data) /** * This function gets the id of the interrupt. The id is stored in a dynamic structure. - * Refer to the print.c file for howto extract data from a dynamic structure. + * Refer to the print.c file for how to extract data from a dynamic structure. */ static guint64 get_interrupt_id(LttEvent *e) { @@ -584,18 +612,20 @@ static void CalculateData(LttTime time_exit, guint cpu_id,InterruptEventData *e element = &g_array_index(FirstRequestIrqEntry,irq_entry,i); if(element->cpu_id == cpu_id) { - TotalDurationMaxIrqDuration(element,time_exit, FirstRequestIrqExit); + CalculateTotalDurationAndMaxIrqDurationAndMinIrqDuration(element,time_exit, FirstRequestIrqExit); g_array_remove_index(FirstRequestIrqEntry, i); break; } } } + /** - * This function calculates the total duration of an interrupt and the longest Irq handler. + * This function calculates the total duration of an interrupt and the longest & shortest Irq handlers. * */ -static void TotalDurationMaxIrqDuration(irq_entry *e, LttTime time_exit, GArray *FirstRequestIrqExit){ +static void CalculateTotalDurationAndMaxIrqDurationAndMinIrqDuration(irq_entry *e, LttTime time_exit, GArray *FirstRequestIrqExit) +{ Irq irq; Irq *element; guint i; @@ -608,12 +638,16 @@ static void TotalDurationMaxIrqDuration(irq_entry *e, LttTime time_exit, GArray { irq.cpu_id = e->cpu_id; irq.id = e->id; - irq.frequency++; + irq.TotalNumberOfInterrupts++; irq.total_duration = ltt_time_sub(time_exit, e->event_time); irq.max_irq_handler.start_time = e->event_time; irq.max_irq_handler.end_time = time_exit; irq.max_irq_handler.duration = ltt_time_sub(time_exit, e->event_time); + + irq.min_irq_handler.start_time = e->event_time; + irq.min_irq_handler.end_time = time_exit; + irq.min_irq_handler.duration = ltt_time_sub(time_exit, e->event_time); g_array_append_val (FirstRequestIrqExit, irq); } @@ -627,25 +661,37 @@ static void TotalDurationMaxIrqDuration(irq_entry *e, LttTime time_exit, GArray notFound = TRUE; duration = ltt_time_sub(time_exit, e->event_time); element->total_duration = ltt_time_add(element->total_duration, duration); - element->frequency++; + element->TotalNumberOfInterrupts++; + // Max irq handler if(ltt_time_compare(duration,element->max_irq_handler.duration) > 0) { element->max_irq_handler.duration = duration; element->max_irq_handler.start_time = e->event_time; element->max_irq_handler.end_time = time_exit; } + // Min irq handler + if(ltt_time_compare(duration,element->min_irq_handler.duration) < 0) + { + element->min_irq_handler.duration = duration; + element->min_irq_handler.start_time = e->event_time; + element->min_irq_handler.end_time = time_exit; + } } } if(!notFound) { irq.cpu_id = e->cpu_id; irq.id = e->id; - irq.frequency++; + irq.TotalNumberOfInterrupts++; irq.total_duration = ltt_time_sub(time_exit, e->event_time); - + // Max irq handler irq.max_irq_handler.start_time = e->event_time; irq.max_irq_handler.end_time = time_exit; irq.max_irq_handler.duration = ltt_time_sub(time_exit, e->event_time); + // Min irq handler + irq.min_irq_handler.start_time = e->event_time; + irq.min_irq_handler.end_time = time_exit; + irq.min_irq_handler.duration = ltt_time_sub(time_exit, e->event_time); g_array_append_val (FirstRequestIrqExit, irq); } @@ -764,6 +810,10 @@ static gboolean SecondRequest(void *hook_data, void *call_data) return FALSE; } +/** + * This function calculates the average duration for each Irq Id + * + */ static void CalculateAverageDurationForEachIrqId(InterruptEventData *event_data) { guint64 real_data; @@ -776,7 +826,10 @@ static void CalculateAverageDurationForEachIrqId(InterruptEventData *event_data) real_data = element->total_duration.tv_sec; real_data *= NANOSECONDS_PER_SECOND; real_data += element->total_duration.tv_nsec; - element->average_duration = real_data / element->frequency; + if(element->TotalNumberOfInterrupts != 0) + element->average_duration = real_data / element->TotalNumberOfInterrupts; + else + element->average_duration = 0; } } @@ -870,6 +923,8 @@ static void SumItems(gint irq_id, LttTime Xi, InterruptEventData *event_data) gint duration_inner_part; guint64 period_inner_part; + guint64 frequency_inner_part; + Irq *average; SumId *sumItem; SumId sum; @@ -887,13 +942,22 @@ static void SumItems(gint irq_id, LttTime Xi, InterruptEventData *event_data) if(irq_id == average->id) { duration_inner_part = Xi_in_ns - average->average_duration; - FrequencyHZ = FrequencyInHZ(average->frequency, event_data->time_window); - + FrequencyHZ = FrequencyInHZ(average->TotalNumberOfInterrupts, event_data->time_window); sum.irqId = irq_id; - sum.frequency = average->frequency; + // compute (xi -Xa)^2 of the duration Standard deviation + sum.TotalNumberOfInterrupts = average->TotalNumberOfInterrupts; sum.sumOfDurations = pow (duration_inner_part , 2); + + // compute (xi -Xa)^2 of the period Standard deviation period_inner_part = CalculatePeriodInnerPart(Xi_in_ns, FrequencyHZ); + + // compute (xi -Xa)^2 of the frequency Standard deviation + frequency_inner_part = CalculateFrequencyInnerPart(Xi_in_ns, FrequencyHZ); + sum.sumOfPeriods = period_inner_part; + + sum.sumOfFrequencies = frequency_inner_part; + if(event_data->SumArray->len == NO_ITEMS) { g_array_append_val (SumArray, sum); @@ -908,7 +972,8 @@ static void SumItems(gint irq_id, LttTime Xi, InterruptEventData *event_data) notFound = TRUE; sumItem->sumOfDurations += sum.sumOfDurations; sumItem->sumOfPeriods += sum.sumOfPeriods; - } + sumItem->sumOfFrequencies += sum.sumOfFrequencies; + } } if(!notFound) { @@ -921,6 +986,10 @@ static void SumItems(gint irq_id, LttTime Xi, InterruptEventData *event_data) } } +/** + * This function computes the inner part of the period standard deviation = sqrt(1/N Sum ((xi -Xa)^2)) + * The inner part is: (xi -Xa)^2 + */ static guint64 CalculatePeriodInnerPart(guint Xi, guint FrequencyHZ) { @@ -934,12 +1003,21 @@ static guint64 CalculatePeriodInnerPart(guint Xi, guint FrequencyHZ) difference = Xi - periodInNSec; result = pow (difference , 2); - - return result; - - +} +/** + * This function computes the inner part of the frequency standard deviation = sqrt(1/N Sum ((xi -Xa)^2)) + * The inner part is: (xi -Xa)^2 + */ +static guint64 CalculateFrequencyInnerPart(guint Xi_in_ns, guint FrequencyHZ) +{ + guint64 result; + gint difference; + + difference = Xi_in_ns - FrequencyHZ; + result = pow (difference , 2); + return result; } /** * This function displays the result on the viewer @@ -955,9 +1033,11 @@ static gboolean DisplayViewer(void *hook_data, void *call_data) GtkTreeIter iter; guint64 real_data; guint maxIRQduration; + guint minIRQduration; double periodInSec; int periodInNsec; char maxIrqHandler[80]; + char minIrqHandler[80]; InterruptEventData *event_data = (InterruptEventData *)hook_data; GArray *FirstRequestIrqExit = event_data->FirstRequestIrqExit; int FrequencyHZ = 0; @@ -978,14 +1058,23 @@ static gboolean DisplayViewer(void *hook_data, void *call_data) sprintf(maxIrqHandler, "%d [%d.%d - %d.%d]",maxIRQduration, element.max_irq_handler.start_time.tv_sec, \ element.max_irq_handler.start_time.tv_nsec, element.max_irq_handler.end_time.tv_sec, \ element.max_irq_handler.end_time.tv_nsec) ; - FrequencyHZ = FrequencyInHZ(element.frequency,event_data->time_window); + + minIRQduration = element.min_irq_handler.duration.tv_sec; + minIRQduration *= NANOSECONDS_PER_SECOND; + minIRQduration += element.min_irq_handler.duration.tv_nsec; + sprintf(minIrqHandler, "%d [%d.%d - %d.%d]",minIRQduration, element.min_irq_handler.start_time.tv_sec, \ + element.min_irq_handler.start_time.tv_nsec, element.min_irq_handler.end_time.tv_sec, \ + element.min_irq_handler.end_time.tv_nsec) ; + + + FrequencyHZ = FrequencyInHZ(element.TotalNumberOfInterrupts,event_data->time_window); if(FrequencyHZ != 0) { periodInSec = (double)1/FrequencyHZ; periodInSec *= NANOSECONDS_PER_SECOND; periodInNsec = (int)periodInSec; - //printf("period1:%d\n", periodInNsec); + } gtk_list_store_append (event_data->ListStore, &iter); @@ -996,11 +1085,11 @@ static gboolean DisplayViewer(void *hook_data, void *call_data) DURATION_COLUMN, real_data, DURATION_STANDARD_DEV_COLUMN, CalculateDurationStandardDeviation(element.id, event_data), MAX_IRQ_HANDLER_COLUMN, maxIrqHandler, + MIN_IRQ_HANDLER_COLUMN, minIrqHandler, AVERAGE_PERIOD , periodInNsec, PERIOD_STANDARD_DEV_COLUMN, CalculatePeriodStandardDeviation(element.id, event_data), - -1); - - + FREQUENCY_STANDARD_DEV_COLUMN, CalculateFrequencyStandardDeviation(element.id, event_data), + -1); } @@ -1037,20 +1126,24 @@ static gboolean DisplayViewer(void *hook_data, void *call_data) * This function converts the number of interrupts over a time window to * frequency in HZ */ -static int FrequencyInHZ(gint frequency, TimeWindow time_window) +static int FrequencyInHZ(gint NumerofInterruptions, TimeWindow time_window) { guint64 frequencyHz = 0; double timeSec; // time in second double result; result = ltt_time_to_double(time_window.time_width); timeSec = (result/NANOSECONDS_PER_SECOND); //time in second - frequencyHz = frequency / timeSec; + frequencyHz = NumerofInterruptions / timeSec; return frequencyHz; } /** * This function calculates the duration standard deviation - * + * Duration standard deviation = sqrt(1/N Sum ((xi -Xa)^2)) + * Where: + * sumId.sumOfDurations -> Sum ((xi -Xa)^2) + * inner_component -> 1/N Sum ((xi -Xa)^2) + * deviation-> sqrt(1/N Sum ((xi -Xa)^2)) */ static int CalculateDurationStandardDeviation(gint id, InterruptEventData *event_data) { @@ -1063,7 +1156,10 @@ static int CalculateDurationStandardDeviation(gint id, InterruptEventData *event sumId = g_array_index(event_data->SumArray, SumId, i); if(id == sumId.irqId) { - inner_component = sumId.sumOfDurations/ sumId.frequency; + if(sumId.TotalNumberOfInterrupts != 0) + inner_component = sumId.sumOfDurations/ sumId.TotalNumberOfInterrupts; + else + inner_component = 0.0; deviation = sqrt(inner_component); return deviation; } @@ -1074,6 +1170,12 @@ static int CalculateDurationStandardDeviation(gint id, InterruptEventData *event /** * This function calculates the period standard deviation + * Period standard deviation = sqrt(1/N Sum ((xi -Xa)^2)) + * Where: + * sumId.sumOfPeriods -> Sum ((xi -Xa)^2) + * inner_component -> 1/N Sum ((xi -Xa)^2) + * period_standard_deviation-> sqrt(1/N Sum ((xi -Xa)^2)) + * */ static int CalculatePeriodStandardDeviation(gint id, InterruptEventData *event_data) @@ -1082,18 +1184,55 @@ static int CalculatePeriodStandardDeviation(gint id, InterruptEventData *event_d SumId sumId; guint64 inner_component; guint64 period_standard_deviation = 0; + for(i = 0; i < event_data->SumArray->len; i++) { sumId = g_array_index(event_data->SumArray, SumId, i); if(id == sumId.irqId) { - inner_component = sumId.sumOfPeriods / sumId.frequency; + if(sumId.TotalNumberOfInterrupts != 0) + inner_component = sumId.sumOfPeriods / sumId.TotalNumberOfInterrupts; + else + inner_component = 0; + period_standard_deviation = sqrt(inner_component); } } return period_standard_deviation; } + +/** + * This function calculates the frequency standard deviation + * Frequency standard deviation = sqrt(1/N Sum ((xi -Xa)^2)) + * Where: + * sumId.sumOfFrequencies -> Sum ((xi -Xa)^2) + * inner_component -> 1/N Sum ((xi -Xa)^2) + * frequency_standard_deviation-> sqrt(1/N Sum ((xi -Xa)^2)) + * + */ +static int CalculateFrequencyStandardDeviation(gint id, InterruptEventData *event_data) +{ + int i; + SumId sumId; + guint64 inner_component; + guint64 frequency_standard_deviation = 0; + for(i = 0; i < event_data->SumArray->len; i++) + { + sumId = g_array_index(event_data->SumArray, SumId, i); + if(id == sumId.irqId) + { + if(sumId.TotalNumberOfInterrupts != 0) + inner_component = sumId.sumOfFrequencies / sumId.TotalNumberOfInterrupts; + else + inner_component = 0; + + frequency_standard_deviation = sqrt(inner_component); + } + } + return frequency_standard_deviation; +} + /* * This function is called by the main window * when the time interval needs to be updated. @@ -1125,10 +1264,7 @@ void interrupt_destroy_walk(gpointer data, gpointer user_data) { g_info("interrupt_destroy_walk"); InterruptEventData *event_data = (InterruptEventData*) data; - - interrupt_destructor((InterruptEventData*)data); - }