Aim:
-----------------------------
Implementation of unprioritized pre-emptive scheduling with wall clock time of 10ms
for the user level threads package mythread.
Methods/Interface provided:
-----------------------------
1. mythread_init_sched()
2. mythread_exit_sched()
3. mythread_leave_kernel()
4. mythread_scheduler()
5. A signal handler
Members:
-------
Jitesh Shah - jhshah
Salil Kanitkar - sskanitk
Mukul Sinha - msinha
How to Build:
------------
Our Makefile provides a bunch of targets; each one builds a particular part
of the project.
Refer to the following commands for building ->
Compiling:
$ make
# This is equivalent to "make all".
# It compiles all the code files, creates the corresponding object files and builds
# the incorporated test files viz. mytest
Library Compilation:
$ make lib
Cleaning:
$ make clean
Test file:
$ make test
Tags:
$ make tags
# This target will create tags for both emacs and vim. We do not advertize any editor :-)
Test Program
-------------
The mytest.c file provided with the implementation attempts to test the mysched.c functionality
in presence of multiple threads, competing for a gloabl resource and synchronized through
mythread_mutex variable.
We create 10 threads and Set the concurrency to 2 so as to trigger considerable amount of pre-emptions.
Each thread, in turn, tries to acquire a mythread_mutex lock and if successful increments a global
variable by 50, loops over for finite amount of time and then exits.
The even numbered threads do an explicit exit whereas the odd numbered ones perform an implicit exit.