[dpdk-dev] [PATCH] build: enable packet data prefetch

[Marvin Liu]

Data prefetch instruction can preload data into cpu’s hierarchical
cache before data access. Virtualized data paths like virtio utilized
this feature for acceleration. Since most modern cpus have support
prefetch function, we can enable packet data prefetch as default.

Signed-off-by: Marvin Liu <yong.liu at intel.com>

diff --git a/config/meson.build b/config/meson.build
index 69f2aeb605..a0c828a437 100644
--- a/config/meson.build
+++ b/config/meson.build
@@ -109,6 +109,9 @@ if not is_windows
 	add_project_link_arguments('-Wl,--no-as-needed', language: 'c')
 endif
 
+# do prefetch of packet data
+dpdk_conf.set('RTE_PMD_PACKET_PREFETCH', 1)
+
 # use pthreads if available for the platform
 if not is_windows
 	add_project_link_arguments('-pthread', language: 'c')
-- 
2.17.1