config/x86: increase lcores number for native AMD EPYC

By default, max lcores are limited to 128 for x86 platforms. On AMD EPYC processors, this limit needs to be increased to leverage all the cores. The patch adjusts the limit specifically for native compilation on AMD EPYC CPUs. techboard: https://mails.dpdk.org/archives/dev/2023-October/279672.html Signed-off-by: Sivaprasad Tummala <[email protected]> Acked-by: Konstantin Ananyev <[email protected]> Acked-by: Morten Brørup <[email protected]>
DPDK · Nov 12, 2023 · acb34af · acb34af
1 parent 2284d67
commit acb34af
Showing 1 changed file with 17 additions and 0 deletions.
diff --git a/config/x86/meson.build b/config/x86/meson.build
@@ -83,4 +83,21 @@ endif
 
 dpdk_conf.set('RTE_CACHE_LINE_SIZE', 64)
 dpdk_conf.set('RTE_MAX_LCORE', 128)
+
+epyc_zen_cores = {
+    '__znver4__':512,
+    '__znver3__':256,
+    '__znver2__':256,
+    '__znver1__':128
+    }
+
+if get_option('platform') == 'native'
+    foreach m:epyc_zen_cores.keys()
+        if cc.get_define(m, args: machine_args) != ''
+            dpdk_conf.set('RTE_MAX_LCORE', epyc_zen_cores[m])
+            break
+        endif
+    endforeach
+endif
+
 dpdk_conf.set('RTE_MAX_NUMA_NODES', 32)