[dpdk-dev] [PATCH 19/39] event/octeontx: add support worker dequeue function

[Eads, Gage]

Hi Jerin,

<snip>

>  +force_inline uint16_t __hot
>  +ssows_deq_timeout(void *port, struct rte_event *ev, uint64_t
>  +timeout_ticks) {
>  +	struct ssows *ws = port;
>  +	uint64_t iter;
>  +	uint16_t ret = 1;
>  +
>  +	ssows_swtag_wait(ws);
>  +	if (ws->swtag_req) {
>  +		ws->swtag_req = 0;
>  +	} else {
>  +		ret = ssows_get_work(ws, ev);
>  +		for (iter = 1; iter < timeout_ticks && (ret == 0); iter++)
>  +			ret = ssows_get_work(ws, ev);
>  +	}
>  +	return ret;
>  +}

If I understand this correctly, each ssows_get_work() call will wait up to N ns, where N is the dequeue_timeout_ns value supplied to ssovf_mbox_getwork_tmo_set() in ssovf_configure().

So in ssows_deq_timeout, the wait time is (worst case) timeout_ticks * (N * (ns to tick conversion factor)) ticks, which depends on the user-supplied N at eventdev configuration time.

Perhaps in ssovf_configure, if the RTE_EVENT_DEV_CFG_PER_DEQUEUE_TIMEOUT flag is used, the getwork timeout should be set to 1 tick?

Thanks,
Gage