-# 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)
+