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 20:33:21 -0800
From:   John Fastabend <john.fastabend@...il.com>
To:     Daniel Borkmann <daniel@...earbox.net>, 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 05:31 PM, Daniel Borkmann wrote:
> 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?
> 

Yep, removed in v3. Thanks.

>>  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>
> [...]
>