I’m running a loop asynchronously. I’d like to have each iteration take at most max_ns nanoseconds. Here’s what i have so far: function wait4it(t₀, max_ns) t₁ = time_ns() t = t₁ - t₀ if t < max_ns s = 1e-9*(max_ns - t) sleep(s) end nothing end max_ns = 10^9 @asyn…

A working version is: function twait(f::Function, timeout::Real=5) cond = Condition() Timer(x->notify(cond), timeout) t = @async begin res = f() notify(cond) res end wait(cond) t.state == :done ? fetch(t) : :timeout end If then we have a “heavy” comp…

Thanks! I edited my implementation following some of the ideas there (but by all means not all).

We have timedwait in Base (but this polls) or you could follow the following pattern: cond = Condition() Timer(x->notify(cond), max_time) t = @async begin # do stuff notify(cond) end wait(cond) t.state == :done ? fetch(t) : :timeout see also: How to wait on a condition for tasks Better ye…

I hope I interpreted your code correctly: I assumed you gave an example of what one iteration would look like, i.e. the body of the while/for loop. I modified your example in the following way: max_s = 1 cond = Condition() for i in 1:5 Timer(_ -> notify(cond), max_s) sleep(0.1) # and thing…

No, my code is meant to avoid sleep entirely: My code has three steps: setup a condition startup two tasks: a timer task and a worker task, whichever finishes first notifies the condition. wait for the condition (in the main process) and return the result or the timeout.

First and foremost, thank you very much @pbayer , I didn’t know about Timer and I learned something new with the @async call to the “heavy” function that allowed the wait to actually work. I, of course, completely botched the description of what it was I actually needed… I meant to ask for “…each it…

[image] yakir12: t = @async $f() very welcome! Can I learn why do you interpolate $f() into @async?

I don’t have any good reasons to, f being a function and not a variable. But when I @btime:ed this code I got a small residual (instead of 2 s it took 2.002 s) and I was experimenting to see if interpolating f would make a difference… It didn’t. In the case where f doesn’t have anything to return (…

Timed loop

General Usage

Skoffer October 22, 2020, 7:03am 2

Maybe this discussion is relevant? Break function on time limit

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Timed loop

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