Multithreaded Server - v1.3 Summer 1995

• Slow instruments (500 ms response) and synchronous I/O make response of server slow.

  Make server multithreaded or do asynchronous I/O.

• DECthreads provides convenient data locking mechanism.

  Use multithreading with DECthreads.

• Processing of multiple RPC requests concurrently not simple to implement, but can do multiple polling I/Os and one RPC request concurrently (see Fig. ).

  Improves response sufficiently.

    
  Figure: CAMP Server - Multithreaded
  

• Now use DEC C with reentrant run-time library.
• Modify instrument drivers for asynchronous I/O.