From: Thomas Monjalon <thomas@monjalon.net>
To: Marvin Liu <yong.liu@intel.com>
Cc: bruce.richardson@intel.com, stephen@networkplumber.org,
dev@dpdk.org, david.marchand@redhat.com, ferruh.yigit@intel.com,
maxime.coquelin@redhat.com, honnappa.nagarahalli@arm.com,
David Christensen <drc@linux.vnet.ibm.com>,
ruifeng.wang@arm.com
Subject: Re: [dpdk-dev] [PATCH v2] config: enable packet data prefetch
Date: Thu, 15 Oct 2020 00:02:37 +0200 [thread overview]
Message-ID: <3900730.QmOVHUWFXi@thomas> (raw)
In-Reply-To: <20200923015131.101203-1-yong.liu@intel.com>
23/09/2020 03:51, 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@intel.com>
> ---
> +#define RTE_PMD_PACKET_PREFETCH 1
We could also remove the related #ifdefs.
What can be the drawback of always enable those prefetches?
next prev parent reply other threads:[~2020-10-14 22:02 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
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 [this message]
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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