MSFS20 Has anyone had any luck with SimConnect_RequestResponseTimes?

[HornetJockey]

Well, I have another doozy in store: I am trying to gather some info on timing and performance, and I'm trying to use seemingly valid and well-documented SimConnect call SimConnect_RequestResponseTimes(). However, whatever I do and wherever I call it, I am getting no responses, just zeroes. Here is my code (pretty much what is in the SDK):

void    ReportServerResponseTimes(void)
{
    float fElapsedSeconds[5];
    SimConnect_RequestResponseTimes(hSimConnect, 5, &fElapsedSeconds[0]);
    if (bVerbose) fprintf(stderr, "total round trip time: %f\n",                                                fElapsedSeconds[0]);
    if (bVerbose) fprintf(stderr, "time from the request till the packet is sent: %f\n",                        fElapsedSeconds[1]);
    if (bVerbose) fprintf(stderr, "time from the request till the packet is received by the server: %f\n",        fElapsedSeconds[2]);
    if (bVerbose) fprintf(stderr, "time from the request till the response is made by the server: %f\n",        fElapsedSeconds[3]);
    if (bVerbose) fprintf(stderr, "time from the server response to the client receives the packet: %f\n",        fElapsedSeconds[4]);
}

I rigged up my code to call it just once, at a key press, or let it be called during an interval, before and after any of the SimConnect_SetDataOnSimObject() calls - nothing, just zeroes. Does anyone know how to get this to work?

 

[MaxPaperno]

Hi Hornet,

I have no idea, haven't tried that function in ages, but for reference, are you trying this from a remote/external app or within a WASM module? If the units it's returning are actually whole seconds (as seems to be documented... don't remember now if that's true), then I could see how those could easily be zeros since the actual times are surely in low millisecond counts (even for an external app these days, in most cases).

EDIT: oh well I guess those could be fractions of seconds... doesn't say what the actual resolution is. Anyway I wonder how using from inside WASM would change things.

-Max

 

[HornetJockey]

Hi Hornet,

I have no idea, haven't tried that function in ages, but for reference, are you trying this from a remote/external app or within a WASM module? If the units it's returning are actually whole seconds (as seems to be documented... don't remember now if that's true), then I could see how those could easily be zeros since the actual times are surely in low millisecond counts (even for an external app these days, in most cases).

EDIT: oh well I guess those could be fractions of seconds... doesn't say what the actual resolution is. Anyway I wonder how using from inside WASM would change things.

-Max

Hi Max!

I am calling this from a WASM module (standalone app), basically, a sample from SDK, and then sending some data on SimObject and expecting to see the return times.

And yes, I was thinking of the precision too, so I was multiplying:

fElapsedSeconds[n]*1000000.0f

But still all zeros...