Hi
I am in the process of benchmarking the ARM processor embedded within the Zynq device. I am able to run the Dhrystone example code without issue on the board, however this example has all the sections of code related to extracting timer values commented out.
I wish to print the Dhrystones per second value at the end of execution so I removed the #if 0... #endif surrounding the following blocks of code:
// #if 0
#ifdef TIMES
struct tms time_info;
extern clock_t times();
/* see library function "times" */
#define Too_Small_Time 120
/* Measurements should last at least about 2 seconds */
#endif
#ifdef
TIME
extern long time();
/* see library function "time" */
#define
Too_Small_Time 2
/* Measurements should last at least 2 seconds */
#endif
// #endif
(within main)
// #if 0
#ifdef TIMES
times (&time_info);
Begin_Time = (long) time_info.tms_utime;
#endif
#ifdef TIME
Begin_Time = time ( (long *) 0);
#endif
// #endif
// #if 0
#ifdef TIMES
times (&time_info);
End_Time = (long) time_info.tms_utime;
#endif
#ifdef TIME
End_Time = time ( (long *) 0);
#endif
// #endif
User_Time = End_Time - Begin_Time;
if(User_Time < Too_Small_Time)
{
printf ( "Measured time too small to obtain meaningful results\n");
printf ( "Please increase number of runs\n");
printf ( "\n");
}
else
{
#ifdef TIME
Microseconds = (float) User_Time * Mic_secs_Per_Second/ (float) Number_Of_Runs;
Dhrystones_Per_Second = (float) Number_Of_Runs / (float) User_Time;
#else
Microseconds = (float) User_Time * Mic_secs_Per_Second/ ((float) HZ * ((float) Number_Of_Runs));
Dhrystones_Per_Second = ((float) HZ * (float) Number_Of_Runs)/ (float) User_Time;
#endif
printf ("Microseconds for one run through Dhrystone: ");
printf ("%6.1f \n", Microseconds);
printf ("Dhrystones per Second: ");
printf ("%6.1f \n", Dhrystones_Per_Second);
printf ("\n");
}
Now when I build the project I encounter the error
Building target: dhrystone_0.elf
Invoking: ARM gcc linker
arm-xilinx-eabi-gcc -Wl,-T -Wl,../src/lscript.ld -L../../dhrystone_bsp_0/ps7_cortexa9_0/lib -o"dhrystone_0.elf" ./src/dhry_1.o ./src/dhry_2.o ./src/platform.o -Wl,--start-group,-lxil,-lgcc,-lc,--end-group
d:/xilinx_install/14.1/ise_ds/edk/gnu/arm/nt/bin/../lib/gcc/arm-xilinx-eabi/4.6.1/../../../../arm-xilinx-eabi/lib\libc.a(lib_a-timesr.o): In function `_times_r':
timesr.c:(.text+0x4): undefined reference to `_times'
collect2: ld returned 1 exit status
make: *** [dhrystone_0.elf] Error 1
Is there any way to resolve this so that I can run the Dhrystone example and return the Dhystones per second value?
Regards
Jill
