Thread scheduling C

Thread scheduling C

By : user3862318
Date : November 22 2020, 07:01 PM
hop of those help? If I understand the question correctly you are trying to produce sort of a pipeline where the next thread picks up where the previous one stops. The cleanest solution in this case is to use binary semaphores.
Say you have four threads. Create four semaphores with initial values of {1, 0, 0, 0}. Assign semaphore per thread and have each thread down its semaphore upon start and up the next semaphore (modulo number of threads) in the chain. Start all threads - the first acquires its semaphore immediately, does its work, other threads block on their semaphores. First thread finishes work, ups the next semaphore, thus waking up the next thread, then loops to the beginning, etc. etc.
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Task scheduling frameworks - not thread scheduling!

Task scheduling frameworks - not thread scheduling!

By : Kathryn
Date : March 29 2020, 07:55 AM
will be helpful for those in need I don't think there is a framework that will suit your needs out of the box. I know you said you're not looking for a job/thread scheduler, but I think your best bet is probably to roll your own optimization/prioritization code around a "dumb" job/thread scheduling framework like Quartz (or whatever you have in place). If you go with Quartz, the API can probably provide you with some information useful for items 3 and 4 of your optimization criteria. Additionally, Quartz has a job "priority" concept, so once you've computed the optimized priority, it should make scheduling the execution easy.
If you do find a framework that does what you ask, please post back here -- I'm sure there are others who could use something similar.
How does linux process scheduling policy relate to thread scheduling policy?

How does linux process scheduling policy relate to thread scheduling policy?

By : djchallis
Date : March 29 2020, 07:55 AM
I wish did fix the issue. Linux does not support process scheduling at all. Scheduling is entirely on a thread basis. The sched_* functions incorrectly modify the thread scheduling parameters of the target thread id instead of the scheduling parameters of a process. See:
http://sourceware.org/bugzilla/show_bug.cgi?id=14829 and http://sourceware.org/bugzilla/show_bug.cgi?id=15088
Why is process scheduling not called thread scheduling?

Why is process scheduling not called thread scheduling?

By : user2242097
Date : March 29 2020, 07:55 AM
I hope this helps . OS-scheduled threads are a relatively new feature. It was not that long ago when a separate path of execution on Unix meant creating an entirely new process. So there is historical resistance.
Some systems (Unix variants, VMS) schedule processes, not threads. Process scheduling is likely to remain the way to go in real time operating systems.
CUDA Thread Scheduling: custom thread swapping/event based locks?

CUDA Thread Scheduling: custom thread swapping/event based locks?

By : Travis Mullins
Date : March 29 2020, 07:55 AM
I wish this helpful for you The link you have given covers CUDA dynamic parallelism (CDP).
In the non-CDP case, if you intend to use mutexes/locks, it is the programmers responsibility to make sure that all necessary threads can make forward progress. There is no way to "swap" between active threads. Once a thread is made active by the GPU scheduler, it must be able to eventually make forward progress. It will consume a scheduler slot (a slot on the SM) until it is able to do so. You cannot change this.
Thread scheduling Round Robin / scheduling dispatch

Thread scheduling Round Robin / scheduling dispatch

By : user3865390
Date : March 29 2020, 07:55 AM
I hope this helps . First, the OS is the only entity in your system that can actually schedule your threads to run. The most common schedulers in newer Linux kernels are static-priority FCFS and RR, as well as the SCHED_OTHER scheduler, now implemented by the completely-fair scheduler.
It seems that you are confusing the notion of "OS-level scheduling" v.s. "application-level scheduling". The former knows nothing about your application nor its semantics. The later must be implemented using tools such as semaphores, queues, etc...
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