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From: Stephen Hemminger <stephen@networkplumber.org>
To: Marvin Liu <yong.liu@intel.com>
Cc: bruce.richardson@intel.com, dev@dpdk.org
Subject: Re: [dpdk-dev] [PATCH] build: enable packet data prefetch
Date: Tue, 22 Sep 2020 07:11:51 -0700	[thread overview]
Message-ID: <20200922071151.2bd35352@hermes.lan> (raw)
In-Reply-To: <20200922082135.62240-1-yong.liu@intel.com>

On Tue, 22 Sep 2020 16:21:35 +0800
Marvin Liu <yong.liu@intel.com> wrote:

> 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')

With meson, the project has been using rte_config.h for this.

  reply	other threads:[~2020-09-22 14:12 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-09-22  8:21 [dpdk-dev] [PATCH] build: enable packet data prefetch Marvin Liu
2020-09-22 14:11 ` Stephen Hemminger [this message]
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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