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From: Marvin Liu <yong.liu@intel.com>
To: bruce.richardson@intel.com
Cc: dev@dpdk.org,
Marvin Liu <yong.liu@intel.com>
Date: Tue, 22 Sep 2020 16:21:35 +0800
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Subject: [dpdk-dev] [PATCH] build: enable packet data prefetch
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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@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