General Comments about Project 1


    Part 1: The Mandelbrot program
	Programs must be portable! If they seg fault on my home
	system, but not on hammer, then you will not get full
	points. Test on at least two systems.

	Most programs could do with a few more comments.

	I seemed to have scared people off with unordered printf
	writes. This caused many to send all data to rank 0 and
	then write from there. That is safe, but not scalable;
	either in performance and/or memory usage (depending on
	how it was done).

	Test cases that I used:
	1.) mpirun -n 1 mandel -b -f test01.ppm -- -1.5 -1.25 1.0 1.25 1000 800 800
	2.) mpirun -n 2 mandel -b -f test02.ppm -- -1.5 -1.25 1.0 0.0 1000 800 400
	3.) mpirun -n 3 mandel -b -f test03.ppm -- -1.5 -1.25 0.0 0.0 1000 800 666
	4.) mpirun -n 4 mandel -b -f test04.ppm -- -1.5 -1.25 1.0 1.25 1000 800 800
	5.) mpirun -n 1 mandel    -f test05.ppm -- -1.5 -1.25 1.0 1.25 1000 800 800
	6.) mpirun -n 2 mandel    -f test06.ppm -- -0.3 -0.80 -0.1 -0.60 1000 800 800
	7.) mpirun -n 3 mandel    -f test07.ppm -- -0.15 -0.653 -0.145 -0.649 1000 800 800
	8.) mpirun -n 8 mandel    -f test08.ppm -- -0.12685 -0.64955 -0.12680 -0.64950 1000 800 800

	Programs that segfault have been returned to be
	fixed. Without a grader I do not have enough time to debug
	your code. You need to make sure your program runs on
	hammer and other machines. I can help with debugging, if
	you are really stuck, but I cannot debug all the programs
	in this class.