[dpdk-dev] [PATCH] doc: enhance arm64 profiling documentation

[Ruifeng Wang]

> -----Original Message-----
> From: jerinj at marvell.com <jerinj at marvell.com>
> Sent: Sunday, July 11, 2021 3:58 PM
> Cc: dev at dpdk.org; thomas at monjalon.net; Ruifeng Wang
> <Ruifeng.Wang at arm.com>; jerinj at marvell.com
> Subject: [PATCH] doc: enhance arm64 profiling documentation
> 
> From: Jerin Jacob <jerinj at marvell.com>
> 
> Documented the role of RTE_ARM_EAL_RDTSC_USE_PMU to enable PMU
> based rte_rdtsc().
> 
> Signed-off-by: Jerin Jacob <jerinj at marvell.com>
> ---
>  doc/guides/prog_guide/profile_app.rst | 11 ++++++++++-
>  1 file changed, 10 insertions(+), 1 deletion(-)
> 
> diff --git a/doc/guides/prog_guide/profile_app.rst
> b/doc/guides/prog_guide/profile_app.rst
> index 52f85bb9e0..bd6700ef85 100644
> --- a/doc/guides/prog_guide/profile_app.rst
> +++ b/doc/guides/prog_guide/profile_app.rst
> @@ -94,7 +94,16 @@ an ARMv8 machine.
>      make
>      sudo insmod pmu_el0_cycle_counter.ko
> 
> -Please refer to :doc:`../linux_gsg/build_dpdk` for details on compiling DPDK
> with meson.
> +Please refer to :doc:`../linux_gsg/build_dpdk` for generic details on
> compiling DPDK with meson.
> +
> +In order to enable ``PMU`` based ``rte_rdtsc()``, user needs to
> +configure the build with ``-Dc_args='-DRTE_ARM_EAL_RDTSC_USE_PMU'``.
> +
> +Example:
> +
> +.. code-block:: console
> +
> +   meson --cross config/arm/arm64_armv8_linux_gcc
> + -Dc_args='-DRTE_ARM_EAL_RDTSC_USE_PMU' build
> 
>  .. warning::
> 
> --
> 2.32.0
Acked-by: Ruifeng Wang <ruifeng.wang at arm.com>