So, in summary, there isn't a single universally best solution because different programs are written in different styles and under different constraints. On Linux/x86 (where, since kernel 2.6.13, the default jiffy is 0.004 seconds), this means that the ceiling value for a timer is approximately 99.42 days.
timer extension: in them, we define the job schedule and set the service unit that should be triggered. This is somewhat messy (because signals are messy), but without a more detailed description of your requirements and constraints, it is hard to know what else to suggest. Scheduling a task via systemd involves the use of two different unit types: timers and services.The former are unit files with the. With multi-second gaps and no hard real-time response requirement, you might use an alarm and the SIGALRM handler can set a flag and your main processing loop can monitor the flag at convenient, sensible points and do the activity. performancefrequency 00071 double oneoverfrequency 00072 else 00073 // Private UNIX Timer Data. Literally speaking the epoch is Unix time 0 (midnight ), but epoch is often used as a synonym for Unix time. (getrusage(): use instead of times() for getProcessTimes) sys/select.h sys/statvfs.h () sys/time.h (but maybe not the itimer) time.h (System.Posix.
It also depends on the accuracy of timing that you require. The Unix epoch (or Unix time or POSIX time or Unix timestamp) is the number of seconds that have elapsed since Janu(midnight UTC/GMT), not counting leap seconds (in ISO 8601: ). It is the number of seconds that have elapsed since the Unix epoch, excluding leap.
If you cannot use an autonomous thread of control (process or thread), then it depends on how your program is organized, which is why there are many preferred alternatives (they are preferred for different circumstances). In computing, Unix time is a system for describing a point in time. Can you use a separate process to do the job? If so, then using multi-processing instead of multi-threading. If your program is not already threaded, then it gets trickier. Unix timestamp converter Unix time Formatted time Convert a Unix timestamp to a readable date, or the other way around, by changing the value in one of the input boxes above. If your program is already threaded, then using a poll thread is simple and effective.