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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>
Subject: [dpdk-dev] [PATCH] build: enable packet data prefetch
Date: Tue, 22 Sep 2020 16:21:35 +0800
Message-ID: <20200922082135.62240-1-yong.liu@intel.com> (raw)

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


             reply	other threads:[~2020-09-22  8:25 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-09-22  8:21 Marvin Liu [this message]
2020-09-22 14:11 ` Stephen Hemminger
2020-09-23  2:00   ` Liu, Yong
2020-09-23  1:51 ` [dpdk-dev] [PATCH v2] config: " Marvin Liu
2020-10-14 22:02   ` Thomas Monjalon
2020-10-15  1:21     ` Liu, Yong
2020-10-15  4:09       ` Honnappa Nagarahalli
2020-10-15  8:23         ` Liu, Yong
2020-10-15  9:21           ` Thomas Monjalon
2020-10-15 14:38             ` Honnappa Nagarahalli
2020-11-03  1:57   ` [dpdk-dev] [PATCH v3] drivers/net: enable packet data prefetch on x86 Marvin Liu

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