From: Jerin Jacob Date: Sun, 11 Jul 2021 07:58:21 +0000 (+0530) Subject: doc: add Arm PMU build option in profiling guide X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=705e1974138c3749c69aed60ff42775f9ce261b0;p=dpdk.git doc: add Arm PMU build option in profiling guide Documented the role of RTE_ARM_EAL_RDTSC_USE_PMU to enable PMU based rte_rdtsc(). Signed-off-by: Jerin Jacob Acked-by: Ruifeng Wang --- 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::