scheduling

问题 I found some function 'renice' that changes the nice value of process. But I want to know how to change priority in kernel code . Is it okay that just changing the priority value in sched_entity of process? 回答1: If you want to change the niceness of the process programmatically, I would advise against setting these values in the kernel struct directly. Instead, you can utilize several POSIX functions such as setpriority or pthread_setschedparam . The default scheduler policy on Linux is SCHED

问题 I'm trying to speech recognize every 15 minutes for this I'm using PeriodicWorkRequest but I get the error saying java.util.concurrent.ExecutionException: java.lang.RuntimeException: SpeechRecognizer should be used only from the application's main thread . How do I go about doing this? Is PeriodicWorkRequest the wrong approach? 回答1: If you are trying to use Android Framework API to do speech recognition, that functionality is only available with the foreground activity. Based on the error it

问题 Is it possible to subscribe from PHP via Stomp to an ActiveMQ broker and access the JobScheduler (and subsequently remove a scheduled message by its jobId)? I have a set of scheduled messages for a queue "PROD" produced from 2 web servers, and upon the occurrence of an event on the same web server (aware of jobIds), would like to remove them from the JobScheduler so that the consumers (written in Java and located on multiple remote servers) don't receive them. I'm using ActiveMQ broker v5.9.1

问题 I know the algorithm exists but i and having problems naming it and finding a suitable solutions. My problem is as follows: I have a set of J jobs that need to be completed. All jobs take different times to complete, but the time is known. I have a set of R resources. Each recourse R may have any number from 1 to 100 instances. A Job may need to use any number of resources R. A job may need to use multiple instances of a resource R but never more than the resource R has instances. (if a

问题 I would like to schedule a periodic task which executes every X hours. I have a service which is written in Java and I was thinking of creating a long running background thread that runs forever as long as the service is up. How can I ensure that we are executing the task once every X hours? Is clock drift on my host an issue I should be worried about? I know that frequency of the clock ticks may change if the CPUs are working hard. Edit: I was thinking of adding a bean to my spring

来源： https://stackoverflow.com/questions/26142267/sched-fifo-higher-priority-thread-is-getting-preempted-by-the-sched-fifo-lower-p

问题 I have a job scheduling problem with a twist- a minimization constraint. The task is- I have many jobs, each with various dependencies on other jobs, without cycles. These jobs have categories as well, and can be ran together in parallel for free if they belong to the same category. So, I want to order the jobs so that each job comes after its dependencies, but arranged in such a way that they are grouped by category (to run many in parallel) to minimize the number of serial jobs I run. That

问题 I have a job scheduling problem with a twist- a minimization constraint. The task is- I have many jobs, each with various dependencies on other jobs, without cycles. These jobs have categories as well, and can be ran together in parallel for free if they belong to the same category. So, I want to order the jobs so that each job comes after its dependencies, but arranged in such a way that they are grouped by category (to run many in parallel) to minimize the number of serial jobs I run. That

问题 I have a job scheduling problem with a twist- a minimization constraint. The task is- I have many jobs, each with various dependencies on other jobs, without cycles. These jobs have categories as well, and can be ran together in parallel for free if they belong to the same category. So, I want to order the jobs so that each job comes after its dependencies, but arranged in such a way that they are grouped by category (to run many in parallel) to minimize the number of serial jobs I run. That

问题 I have a job scheduling problem with a twist- a minimization constraint. The task is- I have many jobs, each with various dependencies on other jobs, without cycles. These jobs have categories as well, and can be ran together in parallel for free if they belong to the same category. So, I want to order the jobs so that each job comes after its dependencies, but arranged in such a way that they are grouped by category (to run many in parallel) to minimize the number of serial jobs I run. That