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CS170 Discussion – 2009-04-24

CS170 Discussion – 2009-04-24. Bryce Boe. Outline. Announcements Pair Programming Project 3 Questions Partner Assignment. Announcements. Project 3 Deadline extended to Friday March 1 11:59 Late Point Deduction: 1% every 5 minutes New rules for making patches

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CS170 Discussion – 2009-04-24

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  1. CS170 Discussion – 2009-04-24 Bryce Boe

  2. Outline • Announcements • Pair Programming • Project 3 Questions • Partner Assignment

  3. Announcements • Project 3 Deadline extended to Friday March 1 11:59 • Late Point Deduction: 1% every 5 minutes • New rules for making patches • http://cs.ucsb.edu/~bboe/dynamic/170_teams#patches

  4. Pair Programming • 2 people, 1 computer • Two Roles • Driver – in control of keyboard and thus for the code that get emitted • Observer – watches driver, plans the next steps

  5. Why am I talking about this? • Both members understand all changes, thus get more out of this course • Mutual benefit of shared knowledge and experience

  6. Hand-wavy statistics • ~15% less efficient than two independent developers • ~15% fewer bugs produced* • Increased enjoyment from of programming • http://collaboration.csc.ncsu.edu/laurie/Papers/XPSardinia.PDF

  7. “"It's like twice the brains with half the typing!” - Jeff Browne 1st year Ph.D.

  8. Source: Jonathan Kupferman 1st year MS

  9. Pair Programming Video http://agile.csc.ncsu.edu/pairlearning/educators.php Courtesy of North Carolina State University

  10. Project 3 – Realtime processes • A realtime process is one that does not get • Invoked via the syscall: enter_rt(clock_t period)

  11. Notes • Steps in getting message to scheduler • User process makes system call • System call is a wrapper around passing message to the appropriate server • The appropriate server then sends a message to the kernel (kernel call) • The scheduler now has it. • Round-robin scheduling of different priorities

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