From: Olivier MATZ <olivier.matz@6wind.com>
To: Konstantin Ananyev <konstantin.ananyev@intel.com>, dev@dpdk.org
Subject: Re: [dpdk-dev] [PATCH] librte_net: fix TX checksum offload problem with IPv6 packet.
Date: Thu, 11 Dec 2014 13:33:10 +0100 [thread overview]
Message-ID: <54898F06.2060503@6wind.com> (raw)
In-Reply-To: <1418298582-6953-1-git-send-email-konstantin.ananyev@intel.com>
Hi Konstantin,
On 12/11/2014 12:49 PM, Konstantin Ananyev wrote:
> For rte_ipv6_phdr_cksum() gcc 4.8.* with "-O3" not always generates
> correct code.
> Sometimes it 'forgets' to put len and proto fields of psd_header on the stack.
> To overcome that problem and speedup things a bit, refactored rte_raw_cksum()
> by splitting ipv6 pseudo-header csum calculation into 3 phases:
> 1. calc sum for src & dst addresses
> 2. add sum for proto & len.
> 3. finalise sum
> That makes gcc to generate valid code and helps to avoid any copying.
>
> Signed-off-by: Konstantin Ananyev <konstantin.ananyev@intel.com>
Acked-by: Olivier Matz <olivier.matz@6wind.com>
next prev parent reply other threads:[~2014-12-11 12:33 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-12-11 11:49 Konstantin Ananyev
2014-12-11 12:33 ` Olivier MATZ [this message]
2014-12-16 23:56 ` Thomas Monjalon
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