OpenMP Dynamic vs Guided Scheduling

What affects the runtime of guided scheduling? There are three effects to consider: 1. Load balance The whole point of dynamic/guided scheduling is to improve the distribution of work in the case where not each loop iteration contains the same amount of work. Fundamentally: schedule(dynamic, 1) provides optimal load balancing dynamic, k will always have … Read more

Quartz.Net how to create a daily schedule that does not gain 1 minute per day

You aren’t specifying the interval which happens to default to 1 minute, so it assumes you want to run the job every minute. Try ITrigger trigger = TriggerBuilder.Create() .WithDailyTimeIntervalSchedule (s => s.WithIntervalInHours(24) .OnEveryDay() .StartingDailyAt(TimeOfDay.HourAndMinuteOfDay(13, 0)) ) .Build(); The default should be to run every day, so the OnEveryDay() isn’t really needed. Not sure why you … Read more

VBA Macro On Timer style to run code every set number of seconds, i.e. 120 seconds

When the workbook first opens, execute this code: alertTime = Now + TimeValue(“00:02:00”) Application.OnTime alertTime, “EventMacro” Then just have a macro in the workbook called “EventMacro” that will repeat it. Public Sub EventMacro() ‘… Execute your actions here’ alertTime = Now + TimeValue(“00:02:00”) Application.OnTime alertTime, “EventMacro” End Sub

how to shield a cpu from the linux scheduler (prevent it scheduling threads onto that cpu)?

The answer is to use cpusets. The python cpuset utility makes it easy to configure them. Basic concepts 3 cpusets root: present in all configurations and contains all cpus (unshielded) system: contains cpus used for system tasks – the ones which need to run but aren’t “important” (unshielded) user: contains cpus used for “important” tasks … Read more

Tennis match scheduling

Preface In Prolog, CLP(FD) constraints are the right choice for solving such scheduling tasks. See clpfd for more information. In this case, I suggest using the powerful global_cardinality/2 constraint to restrict the number of occurrences of each round, depending on the number of available courts. We can use iterative deepening to find the minimal number of admissible … Read more

Linux SCHED_OTHER, SCHED_FIFO and SCHED_RR – differences

SCHED_FIFO and SCHED_RR are so called “real-time” policies. They implement the fixed-priority real-time scheduling specified by the POSIX standard. Tasks with these policies preempt every other task, which can thus easily go into starvation (if they don’t release the CPU). The difference between SCHED_FIFO and SCHED_RR is that among tasks with the same priority, SCHED_RR … Read more