1# SPDX-License-Identifier: BSD-3-Clause 2# Copyright(c) 2018 Luca Boccassi <[email protected]> 3# Copyright(c) 2021 IBM Corporation 4 5if not dpdk_conf.get('RTE_ARCH_64') 6 error('Only 64-bit compiles are supported for this platform type') 7endif 8dpdk_conf.set('RTE_ARCH', 'ppc_64') 9dpdk_conf.set('RTE_ARCH_PPC_64', 1) 10 11# RHEL 7.x uses gcc 4.8.X which doesn't generate code for Power 9 CPUs, 12# though it will detect a Power 9 CPU when the "-mcpu=native" argument 13# is used, resulting in a build failure. 14power9_supported = cc.has_argument('-mcpu=power9') 15if not power9_supported 16 cpu_instruction_set = 'power8' 17 machine_args = ['-mcpu=power8', '-mtune=power8'] 18 dpdk_conf.set('RTE_MACHINE','power8') 19endif 20 21# Suppress the gcc warning "note: the layout of aggregates containing 22# vectors with 4-byte alignment has changed in GCC 5". 23if (cc.get_id() == 'gcc' and cc.version().version_compare('>=10.0') and 24 cc.version().version_compare('<12.0') and cc.has_argument('-Wno-psabi')) 25 add_project_arguments('-Wno-psabi', language: 'c') 26endif 27 28# Certain POWER9 systems can scale as high as 1536 LCORES, but setting such a 29# high value can waste memory, cause timeouts in time limited autotests, and is 30# unlikely to be used in many production situations. Similarly, keeping the 31# default 64 LCORES seems too small as most POWER9 dual socket systems will have 32# at least 128 LCORES available. Set RTE_MAX_LCORE to 128 for POWER systems as 33# a compromise. 34dpdk_conf.set('RTE_MAX_LCORE', 128) 35 36# POWER systems do not allocate NUMA nodes sequentially. A dual socket system 37# will have CPUs associated with NUMA nodes 0 & 8, so ensure that the second 38# NUMA node will be supported by setting RTE_MAX_NUMA_NODES to 16. High end 39# systems can scale even higher with as many as 32 NUMA nodes. 40dpdk_conf.set('RTE_MAX_NUMA_NODES', 16) 41 42dpdk_conf.set('RTE_CACHE_LINE_SIZE', 128) 43