Homework/Lab 1 Sample Solutions
Solutions here gathered from submissions

Graded out of 5 points.

1. 0 points, since everyone can send e-mail.

2. 0 points, nothing to submit.

3. Makefile for pthread test program. (1 point)

#
# Makefile to compile and link the pthreadhello program

# Default target 
all: pthreadhello

# The compiler
CC=gcc

# Flags to pass to the compiler
CFLAGS=-pthread

# Source files
CFILES=pthreadhello.c

# Object files
OFILES=$(CFILES:.c=.o)

# Rule to make object files from source files
.c.o:
        $(CC) -c $<

# Rule to make the pthreadhello program
pthreadhello:   $(OFILES)
        $(CC) -o pthreadhello $(OFILES)

4. Makefile for MPI test program (1 point)

#
# Makefile to compile and link sample mpi program

# Default target - create the mpi program
all: mpihello

# The compiler
CC=mpicc

# Flags to pass to the compiler
CFLAGS=

# The source files for the mpi program
CFILES=mpihello.c

# The object files for the program
OFILES=$(CFILES:.c=.o)

# Rule to make the object files from the source files
.c.o:
        $(CC) -c $<

# Rule to make the mpihello program/target
mpihello:       $(OFILES)
        $(CC) -o mpihello $(OFILES)

5. Come up with an example application that you use which you think
   could benefit from parallel processing.  Describe how you think it
   could be parallelized and what benefit parallelization might
   provide. (3 points)

Some of the answers given worthy of the full point:

- web servers
- file search utilitites
- cracking of cryptographic codes