[Ovmsdev] How fast can the poller go?

[Michael Balzer]

Steve,

have a look at API methods PollSetThrottling() and 
PollSetResponseSeparationTime():


void PollSetThrottling(uint8_t sequence_max) { m_poll_sequence_max = 
sequence_max; }
uint8_t           m_poll_sequence_max;    // Polls allowed to be sent in 
sequence per time tick (second), default 1, 0 = no limit


/**
  * PollSetResponseSeparationTime: configure ISO TP multi frame response 
timing
  *  See: https://en.wikipedia.org/wiki/ISO_15765-2
  *
  *  @param septime
  *    Separation Time (ST), the minimum delay time between frames. 
Default: 25 milliseconds
  *    ST values up to 127 (0x7F) specify the minimum number of 
milliseconds to delay between frames,
  *    while values in the range 241 (0xF1) to 249 (0xF9) specify delays 
increasing from
  *    100 to 900 microseconds.
  *
  *  The configuration is kept unchanged over calls to PollSetPidList() 
or PollSetState().
  */


The defaults are conservative & very cooperative for both parameters, 
but keep in mind you're not alone on the bus.

Regards,
Michael


Am 22.12.20 um 14:34 schrieb Steve Davies:
> Hi,
>
> On the i3 I have to poll for everything - at least if I use the OBD2 port.
>
> It seems that the poller only sends one request per second.  That's 
> how it looks in the logs.
>
> This severely limits how many pids I can poll and basically means I 
> might as well not bother with any of the "real time" metrics.
>
> Is there a reason why PollerSend couldn't look through the whole poll 
> list and poll all the entries that are due/overdue on each call?  At 
> the moment it just looks until if finds one to do and then it returns.
>
> Or maybe if we can't take too long then say do 10 on each call?
>
> Thanks,
> Steve
>
>
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