Application.Sleep and CPU

[mixim]

Hi, Why Application.Sleep() is consuming the processor too much?
What else can I use instead of Application.Sleep(). Thanks

[mixim]

image widget

my code example
Application.Sleep(10000) ;10 second

[Imagine Programming]

I don't know what Application.Sleep is doing to be honest, I thought it would just call Kernel32!Sleep, but it appears to do something else.
Anyhow, put this in globals:

function Sleep(timeInMilliseconds)
    assert(type(timeInMilliseconds) == "number", "A numeric time in milliseconds is required for Sleep()");
    DLL.CallFunction(_SystemFolder .. "\\Kernel32.dll", "Sleep", tostring(timeInMilliseconds), DLL_RETURN_TYPE_INTEGER, DLL_CALL_STDCALL);
end

usage:

Sleep(10000);

API: https://docs.microsoft.com/en-us/win...synchapi-sleep

[mixim]

I don't know what Application.Sleep is doing to be honest, I thought it would just call Kernel32!Sleep, but it appears to do something else.
Anyhow, put this in globals:

function Sleep(timeInMilliseconds)
assert(type(timeInMilliseconds) == "number", "A numeric time in milliseconds is required for Sleep()");
DLL.CallFunction(_SystemFolder .. "\\Kernel32.dll", "Sleep", tostring(timeInMilliseconds), DLL_RETURN_TYPE_INTEGER, DLL_CALL_STDCALL);
end

usage:

Sleep(10000);

API: https://docs.microsoft.com/en-us/win...synchapi-sleep

I am grateful to you, thank you very, very much..
that worked smoothly

function Sleep(timeInMilliseconds)
DLL.CallFunction(_SystemFolder .. "\\Kernel32.dll", "Sleep", tostring(timeInMilliseconds), DLL_RETURN_TYPE_INTEGER, DLL_CALL_STDCALL);
end

[Imagine Programming]

I am grateful to you, thank you very, very much..
that worked smoothly

function Sleep(timeInMilliseconds)
DLL.CallFunction(_SystemFolder .. "\\Kernel32.dll", "Sleep", tostring(timeInMilliseconds), DLL_RETURN_TYPE_INTEGER, DLL_CALL_STDCALL);
end

You're welcome, but I don't understand why you removed the 'assert' line from the code.
That assert line makes sure that the provided argument is actually a number, to prevent erroneous input to Kernel32!Sleep.
Is there a reason for it?

[mixim]

You're welcome, but I don't understand why you removed the 'assert' line from the code.
That assert line makes sure that the provided argument is actually a number, to prevent erroneous input to Kernel32!Sleep.
Is there a reason for it?

I'm glad to be here. Sorry, i didn't know this.
I had removed it because I did not encountered an error message.
Ok, i added it back to my code line. Thank you again for the information and warning.

[telco]

Nice.. i also notice this but i though it was just normal...
one other thing make a lot of CPU usage is the FOR LOOP
function Loop(t)

for i=1, t do
Paragraph.SetText("Paragraph1", i)
end

end

Loop(10000)

[mixim]

I think it's normal for for,while,until.
But i sure something is wrong for Sleep

[telco]

mixim Thanks for confirmation...

[Imagine Programming]

I think it's normal for for,while,until.
But i sure something is wrong for Sleep

Yes, Application.Sleep should not use so much CPU. I agree something is wrong with it.
Ulrich do you know how Application.Sleep is implemented in the AMS engine?

[Ulrich]

No, I do not have access to any source code of Indigo Rose products.

Ulrich

[Imagine Programming]

No, I do not have access to any source code of Indigo Rose products.

Ulrich

Too bad, it would've been an interesting anecdote to this thread haha

[Imagine Programming]

I've looked at the implementation of Application.Sleep through debugging and noticed that it tries to process window messages while it's sleeping in a tight loop.

So, as it seems, Application.Sleep is not just an implementation of Sleep. Rather, it's a custom implementation that uses WINMM.DLL!timeGetTime, USER32.DLL!PeekMessageA, USER32.DLL!TranslateMessage and USER32.DLL!DispatchMessageA to keep processing messages.

This also seems to be the reason why it's using up 100% of the core the UI thread is running on, as it's a tight loop without handing over CPU time back to the system. Hence that it used 25% of a quad-core CPU, for it me it used 3% on a 16-core CPU with HT (32 logical).

[mixim]

I've looked at the implementation of Application.Sleep through debugging and noticed that it tries to process window messages while it's sleeping in a tight loop.

So, as it seems, Application.Sleep is not just an implementation of Sleep. Rather, it's a custom implementation that uses WINMM.DLL!timeGetTime, USER32.DLL!PeekMessageA, USER32.DLL!TranslateMessage and USER32.DLL!DispatchMessageA to keep processing messages.

This also seems to be the reason why it's using up 100% of the core the UI thread is running on, as it's a tight loop without handing over CPU time back to the system. Hence that it used 25% of a quad-core CPU, for it me it used 3% on a 16-core CPU with HT (32 logical).

I don't speak very English. So I will try to explain simple.


function Sleep(timeInMilliseconds)
assert(type(timeInMilliseconds) == "number", "A numeric time in milliseconds is required for Sleep()");
DLL.CallFunction(_SystemFolder .. "\\Kernel32.dll", "Sleep", tostring(timeInMilliseconds), DLL_RETURN_TYPE_INTEGER, DLL_CALL_STDCALL);
end

for example for that func, CPU usage is normal but the same problem exists in this too.

I guess, main reason is not the Application.Sleep() command, it is related to the AMS dynamic.

[Imagine Programming]

I don't speak very English. So I will try to explain simple.


function Sleep(timeInMilliseconds)
assert(type(timeInMilliseconds) == "number", "A numeric time in milliseconds is required for Sleep()");
DLL.CallFunction(_SystemFolder .. "\\Kernel32.dll", "Sleep", tostring(timeInMilliseconds), DLL_RETURN_TYPE_INTEGER, DLL_CALL_STDCALL);
end

for example for that func, CPU usage is normal but the same problem exists in this too.

I guess, main reason is not the Application.Sleep() command, it is related to the AMS dynamic.

In my testing, Kernel32!Sleep uses 0% CPU. Can you show me how you use the function?