Re: [PATCH 2/5] selftests: net: add multithread client support to iou-zcrx

[David Wei <dw@davidwei.uk>]

On 2026-04-08 09:38, Juanlu Herrero wrote:
> Add pthreads to the iou-zcrx client so that multiple connections can be
> established simultaneously. Each client thread connects to the server
> and sends its payload independently.
> 
> Introduce struct thread_ctx and the -t option to control the number of
> threads (default 1), preserving backwards compatibility with existing
> tests.
> 
> Signed-off-by: Juanlu Herrero <juanlu@fastmail.com>
> ---
>   .../testing/selftests/drivers/net/hw/Makefile |  2 +-
>   .../selftests/drivers/net/hw/iou-zcrx.c       | 46 +++++++++++++++++--
>   2 files changed, 44 insertions(+), 4 deletions(-)
> 
> diff --git a/tools/testing/selftests/drivers/net/hw/Makefile b/tools/testing/selftests/drivers/net/hw/Makefile
> index deeca3f8d080..227adfec706c 100644
> --- a/tools/testing/selftests/drivers/net/hw/Makefile
> +++ b/tools/testing/selftests/drivers/net/hw/Makefile
> @@ -80,5 +80,5 @@ include ../../../net/ynl.mk
>   include ../../../net/bpf.mk
>   
>   ifeq ($(HAS_IOURING_ZCRX),y)
> -$(OUTPUT)/iou-zcrx: LDLIBS += -luring
> +$(OUTPUT)/iou-zcrx: LDLIBS += -luring -lpthread
>   endif
> diff --git a/tools/testing/selftests/drivers/net/hw/iou-zcrx.c b/tools/testing/selftests/drivers/net/hw/iou-zcrx.c
> index 334985083f61..de2eea78a5b6 100644
> --- a/tools/testing/selftests/drivers/net/hw/iou-zcrx.c
> +++ b/tools/testing/selftests/drivers/net/hw/iou-zcrx.c
> @@ -4,6 +4,7 @@
>   #include <error.h>
>   #include <fcntl.h>
>   #include <limits.h>
> +#include <pthread.h>
>   #include <stdbool.h>
>   #include <stdint.h>
>   #include <stdio.h>
> @@ -85,8 +86,14 @@ static int cfg_send_size = SEND_SIZE;
>   static struct sockaddr_in6 cfg_addr;
>   static unsigned int cfg_rx_buf_len;
>   static bool cfg_dry_run;
> +static int cfg_num_threads = 1;
>   
>   static char *payload;
> +
> +struct thread_ctx {
> +	int			thread_id;

This is set here and in patch 4 but I don't see it being used.