RE: [EXTERNAL] [PATCH] app/crypto-perf-test: fix unset crc algorithm

[Akhil Goyal <gakhil@marvell.com>]

> Because net crc api is not thread-safe, setting crc algorithm
> by the application will prevent race condition in the calc function.
> Race condition still may occur when any of the threads will call this
> function again. Function is called with the highest possible SIMD
> extension, which is AVX512, but if this is not found, CRC API will
> pick the other highest possible extension, or scalar if no SIMD
> available.
> 
> Fixes: f8be1786b1b8 ("app/crypto-perf: introduce performance test application")
> 
> Signed-off-by: Arkadiusz Kusztal <arkadiuszx.kusztal@intel.com>
> ---
>  app/test-crypto-perf/main.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/app/test-crypto-perf/main.c b/app/test-crypto-perf/main.c
> index 40c0b4b54f..58496797d7 100644
> --- a/app/test-crypto-perf/main.c
> +++ b/app/test-crypto-perf/main.c
> @@ -11,6 +11,7 @@
>  #include <rte_eal.h>
>  #include <rte_errno.h>
>  #include <rte_cryptodev.h>
> +#include <rte_net_crc.h>
>  #ifdef RTE_CRYPTO_SCHEDULER
>  #include <rte_cryptodev_scheduler.h>
>  #endif
> @@ -599,6 +600,8 @@ main(int argc, char **argv)
>  		goto err;
>  	}
> 
> +	rte_net_crc_set_alg(RTE_NET_CRC_AVX512);
> +
>  	ret = cperf_verify_devices_capabilities(&opts, enabled_cdevs,
>  			nb_cryptodevs);
>  	if (ret) {
> --
Not sure what is the use of this API here.
Which calc function is it fixing.

Also will it ever pick neon handler?