netdev - Re: [bpf-next PATCH v2 3/7] bpf: sockmap sample, use fork() for send and recv

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Date:   Thu, 11 Jan 2018 02:31:28 +0100
From:   Daniel Borkmann <daniel@...earbox.net>
To:     John Fastabend <john.fastabend@...il.com>, borkmann@...earbox.net,
        ast@...nel.org
Cc:     netdev@...r.kernel.org
Subject: Re: [bpf-next PATCH v2 3/7] bpf: sockmap sample, use fork() for send
 and recv

On 01/10/2018 07:39 PM, John Fastabend wrote:
> Currently for SENDMSG tests first send completes then recv runs. This
> does not work well for large data sizes and/or many iterations. So
> fork the recv and send handler so that we run both send and recv. In
> the future we can add a parameter to do more than a single fork of
> tx/rx.
> 
> With this we can get many GBps of data which helps exercise the
> sockmap code.
> 
> Signed-off-by: John Fastabend <john.fastabend@...il.com>
> ---
>  samples/sockmap/Makefile       |    2 +
>  samples/sockmap/sockmap_user.c |   58 +++++++++++++++++++++++++++++-----------
>  2 files changed, 43 insertions(+), 17 deletions(-)
> 
> diff --git a/samples/sockmap/Makefile b/samples/sockmap/Makefile
> index 73f1da4..4fefd66 100644
> --- a/samples/sockmap/Makefile
> +++ b/samples/sockmap/Makefile
> @@ -8,7 +8,7 @@ HOSTCFLAGS += -I$(objtree)/usr/include
>  HOSTCFLAGS += -I$(srctree)/tools/lib/
>  HOSTCFLAGS += -I$(srctree)/tools/testing/selftests/bpf/
>  HOSTCFLAGS += -I$(srctree)/tools/lib/ -I$(srctree)/tools/include
> -HOSTCFLAGS += -I$(srctree)/tools/perf
> +HOSTCFLAGS += -I$(srctree)/tools/perf -g

Slipped in here?

>  sockmap-objs := ../bpf/bpf_load.o $(LIBBPF) sockmap_user.o
>  
> diff --git a/samples/sockmap/sockmap_user.c b/samples/sockmap/sockmap_user.c
> index 2d51672..48fa09a 100644
> --- a/samples/sockmap/sockmap_user.c
> +++ b/samples/sockmap/sockmap_user.c
> @@ -23,6 +23,7 @@
>  #include <stdbool.h>
>  #include <signal.h>
>  #include <fcntl.h>
> +#include <sys/wait.h>
[...]