Closed. This question needs details or clarity. It is not currently accepting answers.
Want to improve this question? Add details and clarify the problem by editing this post.
Closed 8 years ago.
Improve this question
I'm reading an paper about EDF scheduling algorithm and I'm going to implement it after get it. I couldn't find any acceptable answer for it so I asked this question.
does anybody know this question's answer?
There is no mystery in these terms
relative deadline is a deadline relative to start of the job (start of the thread, ...),
absolute deadline is a specific point in time.
So a periodic job - for example a task that is executed every second - can have constant relative deadline - for example 100ms - but on each run its absolute deadline will be different (11:10:00.100, 11:10:01.100, 11:10:02.100, ...).
See page 335 - http://books.google.pl/books?id=iilIj3JXNrAC&printsec=frontcover&hl=pl&source=gbs_ge_summary_r&cad=0#v=onepage&q&f=false (really good source of info about operating systems)
Related
Closed. This question needs details or clarity. It is not currently accepting answers.
Want to improve this question? Add details and clarify the problem by editing this post.
Closed 1 year ago.
Improve this question
In the quora answer: https://www.quora.com/How-many-number-of-address-lines-is-needed-for-processor-to-access-4MB-memory - the top answer starts with 1 address line giving you 2 bytes of data. But my question is how mathematically?
A single address line can be in one of two states - either in state 0 or 1, hence it is able to address two distinct locations.
Closed. This question needs debugging details. It is not currently accepting answers.
Edit the question to include desired behavior, a specific problem or error, and the shortest code necessary to reproduce the problem. This will help others answer the question.
Closed 1 year ago.
Improve this question
I have this code, and it is supposed to write to Firestore. However, when it does the function, in the back end, it shows highlighted as red and then disappears.
db.collection("jokes").document("Dad Jokes").setData(["\(dadJokeNum + 1)": Joke.text!])
Please help.
Using SetData without Merge will delete existing values - it is suggested that if the document exists prior, you should always be using merge: true. Firestore also has a limited 1 write per second each, you should be managing writes together as it is most likely similar writes will conflict and potentially resolve out of order.
Closed. This question needs details or clarity. It is not currently accepting answers.
Want to improve this question? Add details and clarify the problem by editing this post.
Closed 1 year ago.
Improve this question
I am making a use case diagram for a school and was wondering how I can show a degree course is either full time or part time and then each degree contains 1 to 10 courses.
Thanks!
The rules you are giving in your question are not captured in the use case model, but in the domain model. The description of a use case is influenced by the domain model. Like for example a use case enroll for term will describe steps where the user enters one or more courses. For a domain model you would create a class diagram.
Closed. This question needs to be more focused. It is not currently accepting answers.
Want to improve this question? Update the question so it focuses on one problem only by editing this post.
Closed 4 years ago.
Improve this question
How can I create a member in a PDS using either JCL or REXX? The member's name must contain the actual date. Is that possible?
It can be done in JCL and by Rexx. You need to remember that member names are a maximum of 8 bytes and cannot start with a numeric so you would need to use something like the 'Julian' date e.g. 2017365. You may have system variables available to populate your JCL - check the JCL manual and level of Z/os that you are using.
Closed. This question needs debugging details. It is not currently accepting answers.
Edit the question to include desired behavior, a specific problem or error, and the shortest code necessary to reproduce the problem. This will help others answer the question.
Closed 6 years ago.
Improve this question
I have 3 FirDataSnapshot. When I am using observeEventType(.ChildAdded,..), it returns 3 item. When I use observeSingeEventTypeOf, it returns only 1 snapshot. I don't know why.
observeSingleEventType returns single value means it observe .childAdded only once ... the block is immediately canceled after the initial data is returned.
If you are using observeEventType than it gets all values from database ..