# SPDX-License-Identifier: BSD-3-Clause
# Copyright(c) 2018 Luca Boccassi <bluca@debian.org>
+# Copyright(c) 2021 IBM Corporation
if not dpdk_conf.get('RTE_ARCH_64')
- error('Only 64-bit compiles are supported for this platform type')
+ error('Only 64-bit compiles are supported for this platform type')
endif
dpdk_conf.set('RTE_ARCH', 'ppc_64')
dpdk_conf.set('RTE_ARCH_PPC_64', 1)
# is used, resulting in a build failure.
power9_supported = cc.has_argument('-mcpu=power9')
if not power9_supported
- machine = 'power8'
- machine_args = ['-mcpu=power8', '-mtune=power8']
- dpdk_conf.set('RTE_MACHINE','power8')
+ cpu_instruction_set = 'power8'
+ machine_args = ['-mcpu=power8', '-mtune=power8']
+ dpdk_conf.set('RTE_MACHINE','power8')
endif
-# overrides specific to ppc64
-dpdk_conf.set('RTE_MAX_LCORE', 1536)
-dpdk_conf.set('RTE_MAX_NUMA_NODES', 32)
+# Suppress the gcc warning "note: the layout of aggregates containing
+# vectors with 4-byte alignment has changed in GCC 5".
+if (cc.get_id() == 'gcc' and cc.version().version_compare('>=10.0') and
+ cc.version().version_compare('<12.0') and cc.has_argument('-Wno-psabi'))
+ add_project_arguments('-Wno-psabi', language: 'c')
+endif
+
+# Certain POWER9 systems can scale as high as 1536 LCORES, but setting such a
+# high value can waste memory, cause timeouts in time limited autotests, and is
+# unlikely to be used in many production situations. Similarly, keeping the
+# default 64 LCORES seems too small as most POWER9 dual socket systems will have
+# at least 128 LCORES available. Set RTE_MAX_LCORE to 128 for POWER systems as
+# a compromise.
+dpdk_conf.set('RTE_MAX_LCORE', 128)
+
+# POWER systems do not allocate NUMA nodes sequentially. A dual socket system
+# will have CPUs associated with NUMA nodes 0 & 8, so ensure that the second
+# NUMA node will be supported by setting RTE_MAX_NUMA_NODES to 16. High end
+# systems can scale even higher with as many as 32 NUMA nodes.
+dpdk_conf.set('RTE_MAX_NUMA_NODES', 16)
+
dpdk_conf.set('RTE_CACHE_LINE_SIZE', 128)