[PATCH 6/6] test: fix trace_autotest_with_traces parallel execution

[Marat Khalili]

> -----Original Message-----
> From: Stephen Hemminger <stephen at networkplumber.org>
> Sent: Sunday 18 January 2026 20:09
> To: dev at dpdk.org
> Cc: Stephen Hemminger <stephen at networkplumber.org>; stable at dpdk.org; Morten Brørup
> <mb at smartsharesystems.com>; Bruce Richardson <bruce.richardson at intel.com>
> Subject: [PATCH 6/6] test: fix trace_autotest_with_traces parallel execution
> 
> The trace_autotest_with_traces test was reusing the test_args array
> from trace_autotest, which already contained --file-prefix=trace_autotest.
> 
> Fix by building trace_args from scratch for the _with_traces test
> variant instead of appending to the existing test_args array.
> 
> Fixes: 0aeaf75df879 ("test: define unit tests suites based on test types")
> Cc: stable at dpdk.org
> 
> Signed-off-by: Stephen Hemminger <stephen at networkplumber.org>
> ---
>  app/test/suites/meson.build | 14 +++++++++++---
>  1 file changed, 11 insertions(+), 3 deletions(-)
> 
> diff --git a/app/test/suites/meson.build b/app/test/suites/meson.build
> index 38df1cfec2..e62170bebf 100644
> --- a/app/test/suites/meson.build
> +++ b/app/test/suites/meson.build
> @@ -106,10 +106,18 @@ foreach suite:test_suites
>                  is_parallel : false,
>                  suite : 'fast-tests')
>              if not is_windows and test_name == 'trace_autotest'
> -                test_args += ['--trace=.*']
> -                test_args += ['--trace-dir=@0@'.format(meson.current_build_dir())]
> +                # build separate args list to avoid duplicate --file-prefix
> +                trace_args = test_no_huge_args
> +                trace_args += ['--trace=.*']
> +                trace_args += ['--trace-dir=@0@'.format(meson.current_build_dir())]
> +                if is_linux
> +                    trace_args += ['--file-prefix=trace_autotest_with_traces']
> +                endif
> +                if get_option('default_library') == 'shared'
> +                    trace_args += ['-d', dpdk_drivers_build_dir]
> +                endif
>                  test(test_name + '_with_traces', dpdk_test,
> -                    args : test_args,
> +                    args : trace_args,
>                      env: ['DPDK_TEST=' + test_name],
>                      timeout : timeout_seconds_fast,
>                      is_parallel : false,
> --
> 2.51.0
> 

Instead of duplicating some code and hardcoding values for trace_autotest, 
which is error-prone, can we make adding file prefix the last thing we do to 
test_args (perhaps doing it right in the `args : ...` expression) and re-use 
the previous value and logic like we did it before?