On Fri, Apr 12, 2019 at 12:21:41PM -0400, Aaron Conole wrote:
> The arguments being passed will cause failures on laptops that have,
> for instance, 2 cores only.  Most of the tests don't require more
> than a single core.  Some require multiple cores (but those tests
> should be modified to 'SKIP' when the correct number of cores
> aren't available).
> 
> The unit test results shouldn't be impacted by this change, but it
> allows for a future enhancement to pass flags such as '--no-huge'.
> 
> Also include a fix to a reported issue with running on FreeBSD.
> 
> Signed-off-by: Aaron Conole <acon...@redhat.com>
> Reviewed-by: David Marchand <david.march...@redhat.com>
> Acked-by: Luca Boccassi <bl...@debian.org>
> ---
> v2:
> * Fix a spelling mistake
> * Add support for FreeBSD
> * Include a default fallback
> * Use a more robust core-mask argument source (rather than lscpu)
> 
> Conflicts with http://patches.dpdk.org/patch/50850/
> 
>  app/test/meson.build | 35 ++++++++++++++++++++++++++++++++---
>  1 file changed, 32 insertions(+), 3 deletions(-)
> 
> diff --git a/app/test/meson.build b/app/test/meson.build
> index 867cc5863..5e056eb59 100644
> --- a/app/test/meson.build
> +++ b/app/test/meson.build
> @@ -344,17 +344,43 @@ if get_option('tests')
>       timeout_seconds = 600
>       timeout_seconds_fast = 10
>  
> +     # Retrieve the number of CPU cores, defaulting to 4.
> +     num_cores = '0-3'
> +     if host_machine.system() == 'linux'
> +             num_cores = run_command('cat',
> +                                     '/sys/devices/system/cpu/present'
> +                                    ).stdout().strip()
> +     elif host_machine.system() == 'freebsd'
> +             snum_cores = run_command('/sbin/sysctl', '-n',
> +                                      'hw.ncpu').stdout().strip()
> +             inum_cores = snum_cores.to_int() - 1
> +                num_cores = '0-@0@'.format(inum_cores)
> +     endif
> +
> +     num_cores_arg = '-l ' + num_cores
> +
> +     test_args = [num_cores_arg, '-n 4']

This -n 4 parameter can be dropped. Four is the default setting IIRC.
I also wonder are the parameters coming through to the app correctly,
generally meson does not work well with parameters with spaces in them -
I'd expect the "-l" and the num_cores values to be separated in the array.
I also think num_cores_arg value could be dropped too.

If it works though, I'm ok to keep as-is though.

>       foreach arg : fast_parallel_test_names
> -             test(arg, dpdk_test,
> -                     env : ['DPDK_TEST=' + arg],
> -                     args : ['-c f','-n 4', '--file-prefix=@0@'.format(arg)],
> +             if host_machine.system() == 'linux'
> +                     test(arg, dpdk_test,
> +                               env : ['DPDK_TEST=' + arg],
> +                               args : test_args +
> +                                      ['--file-prefix=@0@'.format(arg)],
> +                     timeout : timeout_seconds_fast,
> +                     suite : 'fast-tests')
> +             else
> +                     test(arg, dpdk_test,
> +                             env : ['DPDK_TEST=' + arg],
> +                             args : test_args,
>                       timeout : timeout_seconds_fast,
>                       suite : 'fast-tests')
> +             endif
>       endforeach

While this is needed now, I think in the medium term we should have the
"file-prefix" flag being a warning rather than a hard-error on FreeBSD.
[i.e. keep this, but we should fix it in 19.08 to be shorter]

/Bruce

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