[dpdk-dev] [PATCH 19/39] event/octeontx: add support worker dequeue function
Eads, Gage
gage.eads at intel.com
Thu Mar 23 19:51:07 CET 2017
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
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