"For mutual exclusion with a preemptive scheduler, it is necessary to introduce explicit locks, and machinery that makes requesting processes wait when a lock is unavailable. We considered casting our locks as semaphores, but decided that, compared with monitors, they exert too little structuring discipline on concurrent programs." How do semaphores "exert too little structuring discipline" and how is this remedied by monitors? Construct an example to show how the structuring discipline exerted by monitors could be useful.

Computer Networking: A Top-Down Approach (7th Edition)
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Author:James Kurose, Keith Ross
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On page 4 Experience with Processes and Monitors in Mesa, Lampson and Redell state the following:

"For mutual exclusion with a preemptive scheduler, it is necessary to introduce explicit locks, and machinery that makes requesting processes wait when a lock is unavailable. We considered casting our locks as semaphores, but decided that, compared with monitors, they exert too little structuring discipline on concurrent programs."

How do semaphores "exert too little structuring discipline" and how is this remedied by monitors? Construct an example to show how the structuring discipline exerted by monitors could be useful.

classes
-003: Operating Systems, FH2407 TR 03:30PM-04:45PM
My courses / cs514-003 / week 4 / Mesa Monitors
"For mutual exclusion with a preemptive scheduler, it is necessary to introduce explicit locks, and machinery that makes requesting
processes wait when a lock is unavailable. We considered casting our locks as semaphores, but decided that, compared with
monitors, they exert too little structuring discipline on concurrent programs."
On page 4 Experience with Processes and Monitors in Mesa, Lampson and Redell state the following:
How do semaphores "exert too little structuring discipline" and how is this remedied by monitors? Construct an example to show
how the structuring discipline exerted by monitors could be useful.
00
A BI
= E E E
I
Transcribed Image Text:classes -003: Operating Systems, FH2407 TR 03:30PM-04:45PM My courses / cs514-003 / week 4 / Mesa Monitors "For mutual exclusion with a preemptive scheduler, it is necessary to introduce explicit locks, and machinery that makes requesting processes wait when a lock is unavailable. We considered casting our locks as semaphores, but decided that, compared with monitors, they exert too little structuring discipline on concurrent programs." On page 4 Experience with Processes and Monitors in Mesa, Lampson and Redell state the following: How do semaphores "exert too little structuring discipline" and how is this remedied by monitors? Construct an example to show how the structuring discipline exerted by monitors could be useful. 00 A BI = E E E I
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