#!/bin/bash

# Size of Grid
declare -a size=(1024 10240 102400 1024000 10240000 102400000)
# Size of WorkGroup
declare -a sizeWorkGroup=(16 32 64 128 256)
# Iteration index
declare -i i=0
declare -i j=0
declare -i k=1
# Number of trials for each case
declare -i numTrials=50;
# Remove old peformances file
rm -f performances.txt

# Main loop on array size
while [ "${size[$i]}" != "" ]
do
  # Loop over work-group size
  while [ "${sizeWorkGroup[$j]}" != "" ]
  do
    # Reset trials index and summation
    k=0;
    sumSeq=0
    sumGPU=0
    # Loop over work-group size
    while [ $k -le $numTrials ]
    do
      # Output of execution
      output=$(./sumReductionGPU "${size[$i]}" "${sizeWorkGroup[$j]}")
      # Check Summation value for CPU and GPU
      sum_seq_value=$(echo $output | awk '{print $9}')
      sum_gpu_value=$(echo $output | awk '{print $14}')
      if [ $sum_seq_value != $sum_gpu_value ]
      then
        echo -e "Error with computing Sum for : Size = ${size[$i]} ; WorkGroup size = ${sizeWorkGroup[$j]}"
        exit
      else
        echo -e "Valid pass : Trial = $k ; Array size = ${size[$i]} ; WorkGroup size = ${sizeWorkGroup[$j]}"
        # Runtime for sequential
        time_final_seq_second=$(echo $output | awk '{print $61}')
        time_final_seq_micro=$(echo $output | awk '{print $63}')
        time_final_seq_micro=$(echo "scale=6;$time_final_seq_micro*10^-6" | bc)
        # Sequential runtime for k-nth index
        time_final_seq=$time_final_seq_second$time_final_seq_micro
        # Sum for Sequantial runtime
        sumSeq=$(echo "scale=6;$sumSeq+$time_final_seq" | bc)
        # Runtime for gpu
        time_final_gpu_second=$(echo $output | awk '{print $48}')
        time_final_gpu_micro=$(echo $output | awk '{print $50}')
        time_final_gpu_micro=$(echo "scale=6;$time_final_gpu_micro*10^-6" | bc)
        # GPU runtime for k-nth index
        time_final_gpu=$time_final_gpu_second$time_final_gpu_micro
        # Sum for GPU runtime
        sumGPU=$(echo "scale=6;$sumGPU+$time_final_gpu" | bc)
        # Increment k index
        k=$k+1
      fi
    done
    # Compute Average rutimes
    sumSeq_Average=$(echo "scale=6;$sumSeq/$numTrials" | bc | awk '{printf("%13.12f\n",$1)}')
    sumGPU_Average=$(echo "scale=6;$sumGPU/$numTrials" | bc | awk '{printf("%13.12f\n",$1)}')
    # Printf performances
    echo -e "${size[$i]} ${sizeWorkGroup[$j]} $sumSeq_Average  $sumGPU_Average"  >> performances.txt
    # Increment work-group index
    j=$j+1
  done
  # Blank line for separating blocks
  echo " " >> performances.txt
  j=0
  i=$i+1
done