Changeset 2838

Timestamp:

02/15/07 17:12:45 (6 years ago)

Author:

ttsou

Message:

Added assembly call rdtsc option

Location:

experimental/components/TimingSrc1/trunk/TimingSrc1

Files:

• TimingSrc1.cpp (modified) (5 diffs)
• TimingSrc1.h (modified) (1 diff)

experimental/components/TimingSrc1/trunk/TimingSrc1/TimingSrc1.cpp

@@ -27 +27 @@
 #include <sys/time.h>
 #include "TimingSrc1.h"
+
+#define USE_RDTSC
+//#define USE_GTOD
 
 TimingSrc1_i::TimingSrc1_i(const char *uuid, omni_condition *condition) : Resource_impl(uuid), component_running(condition) 
@@ -110 +113 @@
     Q_out_0.length(packetLength); 
 
-    struct timeval tv;
-
     std::ofstream outputFile;
     outputFile.open("/media/hda1/sent.dat");
@@ -122 +123 @@
     */
     int length = 10000;
-    unsigned long timeStamp_I_sent[length];
-    unsigned long timeStamp_Q_sent[length];
+    unsigned long long timeStamp_I_sent[length];
+    unsigned long long timeStamp_Q_sent[length];
 
     // Rough sample rate setting
     unsigned int samplerate = 64000;
     unsigned int timespacing = (unsigned int) (packetLength * 1e6 / samplerate);
+
+#ifdef USE_GTOD
+    struct timeval tv;
 
     int count = 0;
@@ -138 +142 @@
                 std::cerr << "error: gettimeofday()" << std::endl;
             }
-
             // Push random data
             Class_instance_name->dataOut_0->pushPacket(I_out_0, Q_out_0);
@@ -150 +153 @@
         usleep(timespacing);
     }
+#else
+#ifdef USE_RDTSC
+    unsigned long long int tc;
 
+    int count = 0;
+    while (count < length)
+    {
+        if (Class_instance_name->isRunning)
+        {
+            // Mark timestamp
+            tc = Class_instance_name->get_rdtsc();
+
+            // Push random data
+            Class_instance_name->dataOut_0->pushPacket(I_out_0, Q_out_0);
+
+            // Store timestamps
+            timeStamp_I_sent[count] = 0;
+            timeStamp_Q_sent[count] = tc;
+
+            count++;
+        }
+        usleep(timespacing);
+    }
+#endif
+#endif
     // Rest when finished
     sleep(5);

experimental/components/TimingSrc1/trunk/TimingSrc1/TimingSrc1.h

@@ -69 +69 @@
         //list components provides and uses ports
         standardInterfaces_i::complexLong_u *dataOut_0;
-        
+    
+        __inline__ unsigned long long int get_rdtsc()
+        {
+            unsigned long long int tc;
+            __asm__ volatile (".byte 0x0f, 0x31" : "=A"(tc));
+            return tc;
+        } 
+    
 };
 #endif