Re: [dpdk-dev] [PATCH v2 1/2] lib/eal: add amd epyc2 memcpy routine to eal
From: Thomas Monjalon <hidden>
Date: 2021-10-21 20:14:54
19/10/2021 12:47, Aman Kumar:
This patch provides rte_memcpy* calls optimized for AMD EPYC platforms. Use config/x86/x86_amd_epyc_linux_gcc as cross-file with meson to build dpdk for AMD EPYC platforms.
[...]
quoted hunk ↗ jump to hunk
--- a/config/x86/meson.build +++ b/config/x86/meson.build@@ -72,3 +72,10 @@ endif dpdk_conf.set('RTE_CACHE_LINE_SIZE', 64) dpdk_conf.set('RTE_MAX_LCORE', 128) dpdk_conf.set('RTE_MAX_NUMA_NODES', 32) + +if meson.is_cross_build() + if meson.get_cross_property('platform') == 'amd-epyc' + dpdk_conf.set('RTE_MAX_LCORE', 512) + dpdk_conf.set('RTE_MEMCPY_AMDEPYC', 1) + endif +endif
Thinking again about the cross file.
Why not using the meson option "cpu_instruction_set"
to define RTE_MACHINE as "epyc" and tune other compilation options
without using artificial cross build?
Reminder, the default in config/meson.build is:
if cpu_instruction_set == 'generic'
if host_machine.cpu_family().startswith('x86')
cpu_instruction_set = 'corei7'
Cc Bruce who maintains this meson code.