CATAPULTS Example Schedulers

The following are a handful of example schedulers to show what the CATAPULTS language looks like. Since these have been posted, there have been some new features added to CATAPULTS that would make these even simpler (e.g., scheduler inheritance). These examples should be updated soon.

• pth.sched -- a reimplementation of GNU Pth's internal scheduler
• queue_array.sched -- same as pth.sched except that arrays of queues are used
• rr.sched -- a very simple round-robin scheduler with no priority
• random.sched -- a random order scheduler

• cow.sched -- an application-specific scheduler for the PC version of the CoW web server (based on the GNU Pth threading library).
• embcow.sched -- an application-specific scheduler for the embedded version of the CoW webserver.
• mysql.sched -- an application-specific scheduler for the MySQL database that maximizes the number of New Order Transactions Per Minute (NOTPM) in the DBT2 benchmark. It should be noted that our target application here is actually the program using MySQL, not MySQL itself.

The code added to the above C programs to make them work optimally with a CATAPULTS scheduler was minimal. The code added to the CoW web server can be found here.