From: Ben Pfaff Date: Fri, 31 Dec 2004 20:13:15 +0000 (+0000) Subject: Clarifications. X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4cc63e5b2f809643726e84cfb2c0a8def042bab7;p=pintos-anon Clarifications. --- diff --git a/doc/threads.texi b/doc/threads.texi index 06a902f..ac9ccd4 100644 --- a/doc/threads.texi +++ b/doc/threads.texi @@ -332,9 +332,12 @@ and options @option{-j} and @option{-r} are mutually exclusive. @node Tips @section Tips +@itemize @bullet +@item There should be no busy-waiting in any of your solutions to this assignment. +@item Do your best to resist the temptation to directly disable interrupts in your solution by calling @func{intr_disable} or @func{intr_set_level}, although you may find doing so to be useful @@ -350,23 +353,32 @@ instead of relying on the given synchronization primitives. This must be justified in your @file{DESIGNDOC} file. If you're not sure you're justified, ask! -While all parts of this assignment are required if you intend to earn -full credit on this project, keep in mind that Problem 1-2 (Join) will -be needed for future assignments, so you'll want to get this one -right. We don't give out solutions, so you're stuck with your Join -code for the whole quarter. Problem 1-1 (Alarm Clock) could be very -handy, but not strictly required in the future. The upshot of all -this is that you should focus heavily on making sure that your -implementation of @func{thread_join} works correctly, since if it's -broken, you will need to fix it for future assignments. The other -parts can be turned off in the future if you find you can't make them -work quite right. - -Also keep in mind that Problem 1-4 (the MLFQS) builds on the features you -implement in Problem 1-3, so to avoid unnecessary code duplication, it +@item +All parts of this assignment are required if you intend to earn full +credit on this project. However, some will be more important in +future projects: + +@itemize @minus +@item +Problem 1-1 (Alarm Clock) could be handy for later projects, but it is +not strictly required. + +@item +Problem 1-2 (Join) will be needed for future projects. We don't give +out solutions, so to avoid extra work later you should make sure that +your implementation of @func{thread_join} works correctly. + +@item +Problems 1-3 and 1-4 won't be needed for later projects. +@end itemize + +@item +Problem 1-4 (MLFQS) builds on the features you +implement in Problem 1-3. To avoid unnecessary code duplication, it would be a good idea to divide up the work among your team members such that you have Problem 1-3 fully working before you begin to tackle Problem 1-4. +@end itemize @node Problem 1-1 Alarm Clock @section Problem 1-1: Alarm Clock