[dpdk-dev] [PATCH v2 3/6] app/test: add basic dmadev copy tests
Conor Walsh
conor.walsh at intel.com
Fri Sep 3 18:07:41 CEST 2021
> For each dmadev instance, perform some basic copy tests to validate that
> functionality.
>
> Signed-off-by: Bruce Richardson <bruce.richardson at intel.com>
> ---
<snip>
> +static inline void
> +await_hw(int dev_id, uint16_t vchan)
> +{
> + int idle = rte_dmadev_vchan_idle(dev_id, vchan);
> + if (idle < 0) {
> + /* for drivers that don't support this op, just sleep for 25 microseconds */
> + usleep(25);
> + return;
> + }
> +
> + /* for those that do, *max* end time is one second from now, but all should be faster */
> + const uint64_t end_cycles = rte_get_timer_cycles() + rte_get_timer_hz();
> + while (!idle && rte_get_timer_cycles() < end_cycles) {
> + rte_pause();
> + idle = rte_dmadev_vchan_idle(dev_id, vchan);
> + }
> +}
The new DMA IOAT driver works fine with this function and will not be
affected by an increase in timeout time as suggested by Jerin.
Reviewed-by: Conor Walsh <conor.walsh at intel.com>
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