return 0;
}
-/*****************************************************************************
- *Function name
- * skipEvent_pre_read_cycles : go to the next event,
- * update the necessary fields of the current event
- * increment the cycle counter, save it at the end.
- *Input params
- * t : tracefile
- *return value
- * 0 : success
- * ERANGE : event id is out of range
- ****************************************************************************/
-#if 0
-int skipEvent_pre_read_cycles(LttTracefile * t)
-{
- int evId;
- void * evData;
- LttEventType * evT;
- LttField * rootFld;
-
- evId = (int)(*(guint16 *)(t->cur_event_pos));
- evData = t->cur_event_pos + EVENT_HEADER_SIZE;
-
- evT = ltt_trace_eventtype_get(t->trace,(unsigned)evId);
-
- if(likely(evT)) rootFld = evT->root_field;
- else return ERANGE;
-
- if(likely(rootFld)){
- //event has string/sequence or the last event is not the same event
- if(likely((evT->latest_block!=t->which_block || evT->latest_event!=t->which_event)
- && rootFld->field_fixed == 0)){
- setFieldsOffset(t, evT, evData, t->trace);
- }
- t->cur_event_pos += EVENT_HEADER_SIZE + rootFld->field_size;
- }else t->cur_event_pos += EVENT_HEADER_SIZE;
-
- //evT->latest_block = t->which_block;
- //evT->latest_event = t->which_event;
-
- //the next event is in the next block
- //if(unlikely(evId == TRACE_BLOCK_END)){
- // Specify end of buffer reached.
- // t->cur_event_pos = t->buffer + t->block_size;
- //}else{
- //g_critical("COUNT : %lu", t->cur_cycle_count);
- //t->which_event++;
- // t->current_event_time = getEventTime(t);
- //}
-
- return 0;
-}
-#endif //0
-
-
-
-/*****************************************************************************
- *Function name
- * ltt_tracefile_pre_read_cycles :
- * read the current event, increment the cycle counter
- *Input params
- * t : tracefile
- *Return value
- * False : end of bloc reached
- ****************************************************************************/
-#if 0
-gboolean ltt_tracefile_pre_read_cycles(LttTracefile *tf)
-{
- int err;
- //LttEvent event;
-
- // if(unlikely(t->cur_event_pos == t->buffer + t->block_size)){
- //if(unlikely(t->which_block == t->block_number)){
- // return FALSE;
- //}
- // return FALSE; // end of bloc reached
- //err = readBlock(t, t->which_block + 1);
- //if(unlikely(err))g_error("Can not read tracefile");
- //}
-
- //event.event_id = (int)(*(guint16 *)(t->cur_event_pos));
- //if(unlikely(event.event_id == TRACE_TIME_HEARTBEAT))
- // t->cur_heart_beat_number++;
-
- //t->prev_event_time = t->current_event_time;
- // t->current_event_time = getEventTime(t);
-
- //event.time_delta = *(guint32 *)(t->cur_event_pos + EVENT_ID_SIZE);
- //event.event_time = t->current_event_time;
- //event.event_cycle_count = t->cur_cycle_count;
-
- //event.tracefile = t;
- //event.data = t->cur_event_pos + EVENT_HEADER_SIZE;
- //event.which_block = t->which_block;
- //event.which_event = t->which_event;
-
- /* This is a workaround for fast position seek */
- //event.last_event_pos = t->last_event_pos;
- //event.prev_block_end_time = t->prev_block_end_time;
- //event.prev_event_time = t->prev_event_time;
- //event.pre_cycle_count = t->pre_cycle_count;
- //event.count = t->count;
- //event.last_heartbeat = t->last_heartbeat;
- /* end of workaround */
-
-
- /* Increment the cycle counter for the bloc */
- LttTime time;
- LttCycleCount cycle_count; // cycle count for the current event
- LttCycleCount lEventTotalCycle; // Total cycles from start for event
- LttCycleCount lEventNSec; // Total nsecs from start for event
- LttTime lTimeOffset; // Time offset in struct LttTime
- guint16 evId;
-
- evId = *(guint16 *)tf->cur_event_pos;
-
- // Calculate total time in cycles from start of buffer for this event
- cycle_count = (LttCycleCount)*(guint32 *)(tf->cur_event_pos + EVENT_ID_SIZE);
- //g_debug("event cycle count %llu", cycle_count);
- //
- //gint64 delta_count = (gint64)(cycle_count - tf->pre_cycle_count);
- //LttCycleCount res_delta_count;
- gboolean comp_count = cycle_count < tf->pre_cycle_count;
- tf->pre_cycle_count = cycle_count;
-
- if(unlikely(comp_count)) {
- /* Wrapped */
- tf->count++; //increment wrap count
- }
-
- //if(unlikely(cycle_count < tf->pre_cycle_count)) tf->count++;
- //if(unlikely(delta_count < 0)) {
- // tf->count++; //increment wrap count
- // keep in mind that delta_count is negative here.
- // res_delta_count = delta_count + 0x100000000ULL ;
- //} else
- // res_delta_count = (LttCycleCount)delta_count;
-
- //cycle_count += (LttCycleCount)tf->count << 32;
-
- //FIXME (MD)
- // if(tf->cur_heart_beat_number > tf->count)
- // cycle_count += (tf->cur_heart_beat_number - tf->count) << 32;
-
- //tf->cur_cycle_count = tf->cur_cycle_count + res_delta_count;
- tf->cur_cycle_count = cycle_count | ((LttCycleCount)tf->count << 32);
- //g_debug("cur cycle count %llu", tf->cur_cycle_count);
-
-
-
-
- if(unlikely(evId == TRACE_BLOCK_START)){
- //g_debug("BLOCK START");
- }else if(unlikely(evId == TRACE_BLOCK_END)){
- //g_debug("BLOCK END");
-
- /* The goal of all this pre reading */
- tf->a_block_end->cycle_count = tf->cur_cycle_count;
- //g_debug("end of block cycle count : %llu", tf->cur_cycle_count);
-
- return FALSE;
- }
-
- //update the fields of the current event and go to the next event
- err = skipEvent_pre_read_cycles(tf);
- if(unlikely(err == ERANGE)) g_error("event id is out of range\n");
-
-
- return TRUE;
-}
-#endif //0
/****************************************************************************
*Function name
tf->count = 0;
tf->pre_cycle_count = 0;
tf->cur_cycle_count = 0;
- //g_debug("precalculating cycles begin for block %i", whichBlock);
- /* End of block event already has 64 bits cycle counter! */
- //while(likely(ltt_tracefile_pre_read_cycles(tf)));
- /* Rough approximation of cycles per usec to calculate
- * the real block start and end time.
- */
- getCyclePerNsec(tf);
- /* we are at end position, make end time more precise */
- /* Start overflow_nsec to a negative value : takes account of the
- * start of block cycle counter */
- //tf->overflow_nsec = (-((double)tf->a_block_start->cycle_count)
- // * tf->nsec_per_cycle);
- /* put back the numbers corresponding to end time */
- //tf->overflow_nsec += tf->one_overflow_nsec * tf->count;
-
- //tf->a_block_end->time = getEventTime(tf);
-
- /* Make start time more precise */
- /* Start overflow_nsec to a negative value : takes account of the
- * start of block cycle counter */
- tf->overflow_nsec = (-((double)(tf->a_block_start->cycle_count&0xFFFFFFFF))
- * tf->nsec_per_cycle);
-
- tf->a_block_start->time = getEventTime(tf);
-
- {
- guint64 lEventNSec;
- LttTime lTimeOffset;
- /* End time more precise */
- lEventNSec = ((double)
- (tf->a_block_end->cycle_count - tf->a_block_start->cycle_count)
- * tf->nsec_per_cycle);
- //g_assert(lEventNSec >= 0);
- lTimeOffset = ltt_time_from_uint64(lEventNSec);
- tf->a_block_end->time = ltt_time_add(tf->a_block_start->time, lTimeOffset);
- }
-
-
- //g_debug("precalculating cycles end for block %i", whichBlock);
-
-#if 0
- /* put back pointer at the beginning */
- tf->count = 0;
- tf->pre_cycle_count = 0;
- tf->cur_cycle_count = 0;
- tf->which_event = 1;
- tf->cur_event_pos = tf->buffer;//the beginning of the block, block start ev
- tf->cur_heart_beat_number = 0;
- tf->last_heartbeat = NULL;
-#endif //0
- /* recalculate the cycles per nsec, with now more precise start and end time
- */
getCyclePerNsec(tf);
tf->overflow_nsec = (-((double)(tf->a_block_start->cycle_count&0xFFFFFFFF))
/* Pre-multiply one overflow (2^32 cycles) by nsec_per_cycle */
t->one_overflow_nsec = t->nsec_per_cycle * (double)0x100000000ULL;
- /* See : http://www.azillionmonkeys.com/qed/adiv.html */
- // precalculate the reciprocal, so divisions will be really fast.
- // 2^32-1 == 0xFFFFFFFFULL
- //{
- // double int_res = lBufTotalCycle/lBufTotalNSec;
- // t->cycles_per_nsec_reciprocal =
- // ((0xFFFF+int_res)/int_res);
- //}
-
}
/****************************************************************************
guint16 evId;
evId = *(guint16 *)tf->cur_event_pos;
- //if(unlikely(evId == TRACE_BLOCK_START)){
- // tf->count = 0;
- // tf->pre_cycle_count = 0;
- // tf->cur_cycle_count = tf->a_block_start->cycle_count;
- // return tf->a_block_start->time;
- //}//else if(unlikely(evId == TRACE_BLOCK_END)){
- //tf->count = 0;
- //tf->pre_cycle_count = 0;
- //tf->cur_cycle_count = tf->a_block_end->cycle_count;
- //return tf->a_block_end->time;
- //}
-
- // Calculate total time in cycles from start of buffer for this event
-
-
- //if(unlikely(cycle_count < tf->pre_cycle_count)) tf->count++;
- //if(unlikely(delta_count < 0)) {
- // tf->count++; //increment wrap count
- // keep in mind that delta_count is negative here.
- // res_delta_count = delta_count + 0x100000000ULL ;
- //} else
- // res_delta_count = (LttCycleCount)delta_count;
-
- //cycle_count += (LttCycleCount)tf->count << 32;
-
- //FIXME (MD)
- // if(tf->cur_heart_beat_number > tf->count)
- // cycle_count += (tf->cur_heart_beat_number - tf->count) << 32;
-
- //tf->cur_cycle_count = tf->cur_cycle_count + res_delta_count;
- //
- //
- // Total cycle counter of the event.
- //tf->cur_cycle_count = cycle_count | ((LttCycleCount)tf->count << 32);
-
- //g_debug("cur cycle count %llu", tf->cur_cycle_count);
-
- // Total number of cycles since the beginning of the block
- //lEventTotalCycle = tf->cur_cycle_count
- // - tf->a_block_start->cycle_count;
-
-
-
-#if 0
- // Calculate total time in cycles from start of buffer for this event
cycle_count = (LttCycleCount)*(guint32 *)(tf->cur_event_pos + EVENT_ID_SIZE);
-
- if(unlikely(cycle_count < tf->pre_cycle_count)) tf->count++;
- tf->pre_cycle_count = cycle_count;
- cycle_count += (LttCycleCount)tf->count << 32;
-
- //FIXME (MD)
- // if(tf->cur_heart_beat_number > tf->count)
- // cycle_count += (tf->cur_heart_beat_number - tf->count) << 32;
-
- tf->cur_cycle_count = cycle_count;
- lEventTotalCycle = cycle_count;
- lEventTotalCycle -= tf->a_block_start->cycle_count;
-#endif //0
- // Convert it to nsecs
- //lEventNSec = (double)lEventTotalCycle * (double)tf->nsec_per_cycle;
- //lEventNSec = (tf->cycles_per_nsec_reciprocal * lEventTotalCycle) >> 16;
-
- // Determine offset in struct LttTime
- //lTimeOffset = ltt_time_from_double(lEventNSec);
- //
- // We do not substract block start cycle count here, it has already been done
- // on the overflow_nsec
- // The result should never be negative, because the cycle count of
- // the event following the block start should be >= the previous one.
-
- /* keep the overflow count correct. The heartbeat event makes sure
- * that we do not miss an overflow.*/
-
- cycle_count = (LttCycleCount)*(guint32 *)(tf->cur_event_pos + EVENT_ID_SIZE);
- //g_debug("event cycle count %llu", cycle_count);
- //
- //gint64 delta_count = (gint64)(cycle_count - tf->pre_cycle_count);
- //LttCycleCount res_delta_count;
gboolean comp_count = cycle_count < tf->pre_cycle_count;
+
tf->pre_cycle_count = cycle_count;
if(unlikely(comp_count)) {
- /* Wrapped */
+ /* Overflow */
tf->overflow_nsec += tf->one_overflow_nsec;
tf->count++; //increment overflow count
}
lEventNSec = ((double)
(tf->a_block_end->cycle_count - tf->a_block_start->cycle_count)
* tf->nsec_per_cycle);
-#if 0
- g_printf("CYCLES COUNTED : %llu",
- (gint64)((double)cycle_count * tf->nsec_per_cycle)
- +tf->overflow_nsec
- +tf->a_block_start->cycle_count);
-#endif //0
-
}
#if 0
+ /* If you want to make heart beat a special case and use their own 64 bits
+ * TSC, activate this.
+ */
else if(unlikely(evId == TRACE_TIME_HEARTBEAT)) {
tf->last_heartbeat = (TimeHeartbeat*)(tf->cur_event_pos+EVENT_HEADER_SIZE);
+tf->overflow_nsec;
}
- //g_assert(lEventNSec >= 0);
lTimeOffset = ltt_time_from_uint64(lEventNSec);
time = ltt_time_add(tf->a_block_start->time, lTimeOffset);
break;
}
-#if 0
- if(size == 1) i = *(gint8 *)evD;
- else if(size == 2) i = *(gint16 *)evD;
- else if(size == 4) i = *(gint32 *)evD;
- else if(size == 8) i = *(gint64 *)evD;
-#endif //0
-
return (gint64)i;
}
projects / lttv.git / commitdiff
