From: Pavan Nikhilesh <[email protected]> Add configurable mbuf burst size macros: - RTE_MBUF_BURST_SIZE_THROUGHPUT: optimized for throughput (default 32) - RTE_MBUF_BURST_SIZE_LATENCY: optimized for low latency (default 4) - RTE_MBUF_BURST_SIZE_DEFAULT: references the selected profile
Add meson option 'mbuf_burst_size_default' to select between 'throughput' (default) and 'latency' profiles. Platform-specific configurations can override RTE_MBUF_BURST_SIZE_THROUGHPUT. Set to 64 for CN10K which benefits from larger bursts. Signed-off-by: Pavan Nikhilesh <[email protected]> --- v1 Changes: - Renamed RTE_OPTIMAL_BURST_SIZE to RTE_MBUF_BURST_SIZE_DEFAULT, - Added RTE_MBUF_BURST_SIZE_THROUGHPUT/RTE_MBUF_BURST_SIZE_LATENCY macros with meson option mbuf_burst_size_default to select profile. config/arm/meson.build | 1 + config/meson.build | 15 +++++++++++++++ meson_options.txt | 2 ++ 3 files changed, 18 insertions(+) diff --git a/config/arm/meson.build b/config/arm/meson.build index 523b0fc0ed50..1b2cdbd25774 100644 --- a/config/arm/meson.build +++ b/config/arm/meson.build @@ -481,6 +481,7 @@ soc_cn10k = { ['RTE_MAX_LCORE', 24], ['RTE_MAX_NUMA_NODES', 1], ['RTE_MEMPOOL_ALIGN', 128], + ['RTE_MBUF_BURST_SIZE_THROUGHPUT', 64], ], 'part_number': '0xd49', 'extra_march_features': ['crypto'], diff --git a/config/meson.build b/config/meson.build index 02e2798ccaf1..578b561a4fd1 100644 --- a/config/meson.build +++ b/config/meson.build @@ -393,10 +393,25 @@ if get_option('mbuf_refcnt_atomic') endif dpdk_conf.set10('RTE_IOVA_IN_MBUF', get_option('enable_iova_as_pa')) +# Recommended mbuf burst sizes for generic applications. +# Platform-specific configs may override these values. +# RTE_MBUF_BURST_SIZE_THROUGHPUT: Burst size optimized for throughput. +dpdk_conf.set('RTE_MBUF_BURST_SIZE_THROUGHPUT', 32) +# RTE_MBUF_BURST_SIZE_LATENCY: Burst size optimized for low latency. +dpdk_conf.set('RTE_MBUF_BURST_SIZE_LATENCY', 4) + compile_time_cpuflags = [] subdir(arch_subdir) dpdk_conf.set('RTE_COMPILE_TIME_CPUFLAGS', ','.join(compile_time_cpuflags)) +# RTE_MBUF_BURST_SIZE_DEFAULT: Default burst size used by examples and testpmd. +# Controlled by -Dmbuf_burst_size_default option (throughput or latency). +if get_option('mbuf_burst_size_default') == 'latency' + dpdk_conf.set('RTE_MBUF_BURST_SIZE_DEFAULT', 'RTE_MBUF_BURST_SIZE_LATENCY') +else + dpdk_conf.set('RTE_MBUF_BURST_SIZE_DEFAULT', 'RTE_MBUF_BURST_SIZE_THROUGHPUT') +endif + # apply cross-specific options if meson.is_cross_build() # configure RTE_MAX_LCORE and RTE_MAX_NUMA_NODES from cross file diff --git a/meson_options.txt b/meson_options.txt index e28d24054cf1..2caf0be91d39 100644 --- a/meson_options.txt +++ b/meson_options.txt @@ -46,6 +46,8 @@ option('enable_iova_as_pa', type: 'boolean', value: true, description: 'Support the use of physical addresses for IO addresses, such as used by UIO or VFIO in no-IOMMU mode. When disabled, DPDK can only run with IOMMU support for address mappings, but will have more space available in the mbuf structure.') option('mbuf_refcnt_atomic', type: 'boolean', value: true, description: 'Atomically access the mbuf refcnt.') +option('mbuf_burst_size_default', type: 'combo', choices: ['throughput', 'latency'], value: 'throughput', description: + 'Default mbuf burst size profile: throughput-optimized or latency-optimized.') option('platform', type: 'string', value: 'native', description: 'Platform to build, either "native", "generic" or a SoC. Please refer to the Linux build guide for more information.') option('pkt_mbuf_headroom', type: 'integer', value: 128, description: -- 2.50.1 (Apple Git-155)
