scheduling

问题 Sometimes whenever I write a program in Linux and it crashes due to a bug of some sort, it will become an uninterruptible process and continue running forever until I restart my computer (even if I log out). My questions are: What causes a process to become uninterruptible? How do I stop that from happening? This is probably a dumb question, but is there any way to interrupt it without restarting my computer? 回答1: An uninterruptible process is a process which happens to be in a system call

问题 I have a need to run a piece of code every 120 seconds. I am looking for an easy way to do this in VBA. I know that it would be possible to get the timer value from the Auto_Open event to prevent having to use a magic number, but I can't quite get how to fire off a timer to get something to run every 120 seconds. I don't really want to use an infinite loop with a sleep if I can avoid it. EDIT : Cross-post based on an answer provided is at: Excel VBA Application.OnTime. I think its a bad idea

问题 I am writing an application to allow users to schedule one-time long-running tasks from a web application (Linux/Apache/CGI::Application). To do this I use the the Schedule::At module which is the Perl interface to the "at" command. Since the scheduled tasks are not repeating, I am not considering "cron". I have two issues with "at" though: Scheduling works fine when my CGI application runs under the suexec wrapper, but not when scheduled by the owner of the Apache process. How can I get

问题 What happens if there is a tie in the arrival time of two processes in Round Robin Scheduling? Does the order(not stated) matters or their Burst Time is considered? What will be the difference between the two? Example: p1 AT=0 BT =30 p2 AT = 1 BT = 20 p3 AT = 1 BT = 10 Which process is given CPU time first p2 or p3? 回答1: I would like to suggest p2, as the name 2 implied that it was earlier then p3. 来源： https://stackoverflow.com/questions/52363375/round-robin-scheduling-arrival-time-tie-which

问题 I'm tying to make a app schedules task, for example 28th of april at 5am I need to check a file on my server, for example if there is a Update for the app. But if the user his phone is shutdown at that time the task needs to be executed at the best time possible, next bootup & when the phone is conencted to the internet? I can't figure out how I can do this? I can't find a framework or Classes in the Android API that can do This task in android. Anyone who knows a way to do this and what the

问题 I got 4 jobs: 1, 2, 3, 4. 2's condition: s(1); 3's condition: s(2); 4's condition: s(1) & s(2) & s(3) all these jobs are daily jobs the first day is ok. the second day, the 4th job triggered mutilple times : I think when 1 success, and the status of 2 and 3 are still 'success'(the last days status), so the job 4 triggered, then 2 success, triggered again... so is there any solution for this? becase I only want these condition is based on the current day's result. 回答1: This is already answered

问题 I'm trying to learn how to use Python's apscheduler package, but periodically, it throws the following error: No handlers could be found for logger "apscheduler.scheduler" This message seems to be associated with errors in the scheduled jobs, for example, using jobTester as the scheduled job, the following code, which uses an undefined variable (nameStr0) in jobTester gives the above error message: from apscheduler.scheduler import Scheduler from apscheduler.jobstores.shelve_store import

问题 i want to delete file from my local system after successful send to ftp using batch file. for scheduling purpose i m using window scheduler. below is my code which is able to post to ftp.how to delete that successful send to ftp otherwise file shld not delete. %windir%\system32\ftp.exe -s:%~f0 goto done cd C:\ open Host Name user_name password bi put user_input.csv bye :done @echo off cls exit if i will write delete here then it ll delete from remote server.pls suggest me how to do that using

问题 This question already has answers here : Closed 7 years ago . Possible Duplicate: schedule an email in php I want to schedule my php script which sends emails using windows services as the website is hosted in windows machine. I am looking for a solution which does not involve cron jobs. I want users to schedule a time and the windows service should execute my php email script on the scheduled time so that emails are sent on the scheduled user time. I want to write the entire code in php. 回答1

问题 How can kernel run all the time, when CPU can execute only one process at a time ? That is, if kernel is occupying CPU all the time , then how come other processes run. Please explain Thank You 回答1: In the same way that you can run multiple userspace processes at the same time: Only one of them is actually using the CPU at any given time. You have some interrupts that force them to give it up. Code that is part of the operating system is no different here (except that it is in control of