3. Serial Implementation

serial.c:

// run a function serially N times
//
// run time is sum of the run times for each function call
//

#include "common.c"

 // run the functions
 //
  for( int i = 0; i < N; ++i) f( &D[i].i);
}
---
$ gcc -std=c11 -pedantic -Wall -g -O -o serial serial.c
$ time ./serial
f 0 start = 0, size = 6
f 0 done
f 1 start = 10, size = 5
f 1 done
f 2 start = 20, size = 4
f 2 done
f 3 start = 30, size = 3
f 3 done

real	0m18.007s	# 6+5+4+3 = 18 seconds
user	0m0.002s
sys	0m0.001s