From: compudj <compudj@04897980-b3bd-0310-b5e0-8ef037075253>
Date: Sat, 14 Aug 2004 22:53:33 +0000 (+0000)
Subject: use faster mathematic operations for time calculation
X-Git-Tag: v0.12.20~2721
X-Git-Url: https://git.lttng.org./?a=commitdiff_plain;h=8959a0c85e48eda1a73038bb74708a01b1d0886d;p=lttv.git

use faster mathematic operations for time calculation

git-svn-id: http://ltt.polymtl.ca/svn@768 04897980-b3bd-0310-b5e0-8ef037075253
---

diff --git a/ltt/branches/poly/ltt/trace.h b/ltt/branches/poly/ltt/trace.h
index 8b4fd197..73adc0bf 100644
--- a/ltt/branches/poly/ltt/trace.h
+++ b/ltt/branches/poly/ltt/trace.h
@@ -140,11 +140,6 @@ void ltt_tracefile_open_cpu(LttTrace *t, char * tracefile_name);
 gint ltt_tracefile_open_control(LttTrace *t, char * control_name);
 
 
-/* obtain the time of an event */
-
-LttTime getEventTime(LttTracefile * tf);
-
-
 /* get the data type size and endian type of the local machine */
 
 void getDataEndianType(LttArchSize * size, LttArchEndian * endian);
diff --git a/ltt/branches/poly/ltt/tracefile.c b/ltt/branches/poly/ltt/tracefile.c
index f244a480..dd84a396 100644
--- a/ltt/branches/poly/ltt/tracefile.c
+++ b/ltt/branches/poly/ltt/tracefile.c
@@ -41,6 +41,12 @@
 #define DIR_NAME_SIZE 256
 #define __UNUSED__ __attribute__((__unused__))
 
+
+/* obtain the time of an event */
+
+static inline LttTime getEventTime(LttTracefile * tf);
+
+
 /* set the offset of the fields belonging to the event,
    need the information of the archecture */
 void setFieldsOffset(LttTracefile *tf,LttEventType *evT,void *evD,LttTrace *t);
@@ -1266,15 +1272,14 @@ void getCyclePerNsec(LttTracefile * t)
  *    LttTime        : the time of the event
  ****************************************************************************/
 
-LttTime getEventTime(LttTracefile * tf)
+static inline LttTime getEventTime(LttTracefile * tf)
 {
   LttTime       time;
   LttCycleCount cycle_count;      // cycle count for the current event
   LttCycleCount lEventTotalCycle; // Total cycles from start for event
-  LttCycleCount lEventNSec;       // Total usecs from start for event
+  double        lEventNSec;       // Total nsecs from start for event
   LttTime       lTimeOffset;      // Time offset in struct LttTime
   guint16       evId;
-  LttCycleCount tmpCycleCount = (((LttCycleCount)1)<<32);
 
   evId = *(guint16 *)tf->cur_event_pos;
   if(evId == TRACE_BLOCK_START){
@@ -1294,7 +1299,7 @@ LttTime getEventTime(LttTracefile * tf)
   
   if(cycle_count < tf->pre_cycle_count)tf->count++;
   tf->pre_cycle_count = cycle_count;
-  cycle_count += tmpCycleCount * tf->count;  
+  cycle_count += (LttCycleCount)tf->count << 32;  
   
   //  if(tf->cur_heart_beat_number > tf->count)
   //    cycle_count += tmpCycleCount * (tf->cur_heart_beat_number - tf->count);  
@@ -1308,8 +1313,7 @@ LttTime getEventTime(LttTracefile * tf)
   lEventNSec = (double)lEventTotalCycle / (double)tf->cycle_per_nsec;
 
   // Determine offset in struct LttTime 
-  lTimeOffset.tv_nsec = lEventNSec % NANOSECONDS_PER_SECOND;
-  lTimeOffset.tv_sec  = lEventNSec / NANOSECONDS_PER_SECOND;
+  lTimeOffset = ltt_time_from_double(lEventNSec);
 
   time = ltt_time_add(tf->a_block_start->time, lTimeOffset);