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Questions tagged [preemptive]

Preemptive Scheduling of processes may occur due to a variety of reasons :

  1. The process requires more time than the time quantum assigned to it
  2. A process of a higher priority has entered the queue
  3. A process has less next-CPU-burst time then the one being executed.

In either of the cases, a context switch will occur. The context of the switched process will be saved and that of the new process will be loaded.

84 questions
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Round Robin in non-preemptive?

In my exam question paper,teacher asked to calculate the average waiting time and turnaround time with round robin scheduling algorithm both for preemptive and non-preemptive approach. Here,i did the preemptive approach it's okay. but when i try to…
Rakibul Islam
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GCP Load Balancer behaviour with terminating preemptive instances

Background We have a dispatcher instance group that receives around 700 requests per second per active VM. This dispatcher is behind a Load Balancer that auto scales. Thus far all our VMs are regaular VMs, however we have been studying the…
Flame_Phoenix
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Dotfuscator UWP command exited with code 1

I am configuring my Xamarin solution to obfuscate the code using Dotfuscator using this instructions, all went fine with my Android and iOS projects, but I'm not being able to get it working with UWP. My UWP project is targeting v10.0.15063 and I've…
Asier Peña
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CPU affinity in Linux 3.19

I have a problem setting CPU affinity on a number of kernel threads. The kernel is a variant of 3.19 (with SMP 100Hz) on a 6 core Intel with hyper-threading disabled. I have set isolcpus=1-5. The aim is to have these cores in dyntick mode (with RCU…
toomanychushki
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Preemptive Authentication with HttpClient 4.3 and Solr 5

I tried doing PreEmptive Authentication for a Basic Auth protected Solr using this class https://subversion.jfrog.org/jfrog/build-info/trunk/build-info-client/src/main/java/org/jfrog/build/client/PreemptiveHttpClient.java and Solr , but the methods…
Andrae Browne
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Which is more efficient preemptive or nonpreemptive scheduler?

I am just learning about preemptive and nonpreemptive schedulers so I was wondering which is more efficient a preemptive or nonpreemptive scheduler? or are they equally efficient? or are they just specialized for one task and are efficient in there…
Aberham
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Why the preempt_count is not the per cpu variable in old version linux kernel like 2.6.33

I have question about the preemptive_count in the old linux kernel (e.g. 2.6.33) #define preempt_count() (current_thread_info()->preempt_count) all the related field in this variable is about the CPU related info, why the kernel does not using…
Adambynes
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Non preemptive Earliest deadline first scheduling

I am working on a task scheduler and I would like to use EDF scheduling. The task set I need to schedule contains only tasks with deadlines equal to their periods and the tasks must be scheduled periodically. The problem I have is that the tasks…
vicch
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Simulating OS processes in java / preemptive thread stop / classloader + thread process simulation

I have a thread pool (executor) which I would like to monitor for excessive resource usage (time since cpu and memory seem to be quite harder). I would like to 'kill' threads that are running too long, like killing an OS process. The workers spend…
user744959
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Azure Spot VM average up time

I am trying to evaluate whether I should use Spot VMs and the measure for availability is given as a percentage by Azure. https://www.linkedin.com/pulse/viewing-eviction-rates-spot-virtual-machines-azure-portal-dave-callan/ Does anyone know where I…
Tensing2009
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Creating a schedule for an example task set with non-preemptive Deadline Monotonic (fixed priority) scheduling

In the effort of trying to understand a fixed priority scheduling scheme, such as Deadline Monotonic schedulers, amidst the horribly written definitions online -- I'm trying to schedule an example task set with that policy, in which I require that…
Mo Kanj
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How to calculate the Starting time in a preemptive priority scheduling?

The problem I am facing is that I can not find a way to calculate the start time (called startedAt in the code), so I am able to calculate the turnAround times and the wait times. The logic I am using is the following: we first make a copy of the…
FaissalPearson
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How to implement Priority Preemptive Scheduling (similar to interrupts) with threads in C++

I want to write a C++ program on Windows (but preferably to support cross-platform) in which I have two threads that are scheduled based on Priority Preemptive Scheduling - which is like an interrupt behavior (when the interrupt occurs, the main…
Eyal Gerber
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Delphi XE 5 - THTTPRIO - preemptive connection

I have a web service client created with DELPHI XE 5, i used THTTPRIO, imported wsdl and created the ".pas" files. The server of web service request a preemptive basic authentication (that work fine with SoapUI); I know how to make authentication…
Christopher Zaza
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Can a Preemptive instance be changed to non-Preemptive

I created a Preemptive instance to test out the GCP. I can't find a way to turn Preemptive off and basically migrate the instance to a normal one. Can I turn Preemptive off or do I need to create a brand new instance...and loose some of my testing…
paultechguy
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