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From: "Zhang, Helin" <helin.zhang@intel.com>
To: "Zhang, Helin" <helin.zhang@intel.com>
Cc: "dev@dpdk.org" <dev@dpdk.org>
Subject: Re: [dpdk-dev] [PATCH v2] i40e: workaround for XL710 performance
Date: Fri, 16 Jan 2015 05:54:29 +0000
Message-ID: <F35DEAC7BCE34641BA9FAC6BCA4A12E70A7E9341@SHSMSX104.ccr.corp.intel.com> (raw)
In-Reply-To: <1419817288-22957-1-git-send-email-helin.zhang@intel.com>

> Subject: [PATCH v2] i40e: workaround for XL710 performance
> On XL710, performance number is far from the expectation on recent firmware
> versions, if promiscuous mode is disabled, or promiscuous mode is enabled and
> port MAC address is equal to the packet destination MAC address. The fix for
> this issue may not be integrated in the following firmware version. So the
> workaround in software driver is needed. For XL710, it needs to modify the
> initial values of 3 internal only registers, which are the same as X710.
> Note that the values for X710 and XL710 registers could be different, and the
> workaround can be removed when it is fixed in firmware in the future.
> Signed-off-by: Helin Zhang <helin.zhang@intel.com>
Acked-by: Jingjing Wu <jingjing.wu@intel.com>

> ---
>  lib/librte_pmd_i40e/i40e_ethdev.c | 44
> ++++++++++++++++++++++++++-------------
>  1 file changed, 30 insertions(+), 14 deletions(-)
> v2 changes:
> * Supported modifying the address of 0x269FBC of XL710 during
>   initialization, to fix the minor performance gap to expectation.
>   That means XL710 can meet the performance expectation with this
>   workaround.

Applied. Thanks to Neil's for his reviewing efforts on v1 version!


  parent reply	other threads:[~2015-01-16  5:54 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-12-24  7:14 [dpdk-dev] [PATCH] " Helin Zhang
2014-12-24 14:55 ` Neil Horman
2014-12-25  0:20   ` Zhang, Helin
2014-12-26 14:28     ` Neil Horman
2014-12-28 13:22       ` Zhang, Helin
2014-12-29  1:41 ` [dpdk-dev] [PATCH v2] " Helin Zhang
2015-01-12  7:33   ` Wu, Jingjing
2015-01-12  7:57     ` Zhang, Helin
2015-01-16  5:54   ` Zhang, Helin [this message]
2015-02-10  9:06   ` Xu, Qian Q

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