From: Bruce Richardson <bruce.richardson@intel.com>
To: "Assaad, Sami (Sami)" <sami.assaad@alcatel-lucent.com>
Cc: "dev@dpdk.org" <dev@dpdk.org>
Subject: Re: [dpdk-dev] 10G Interface used as PCI Pass-Through reports 64bytes / packet
Date: Mon, 29 Jun 2015 10:18:32 +0100 [thread overview]
Message-ID: <20150629091832.GA10380@bricha3-MOBL3> (raw)
In-Reply-To: <9478F0FB69DAA249AF0A9BDA1E6ED95218841F3C@US70TWXCHMBA07.zam.alcatel-lucent.com>
On Fri, Jun 26, 2015 at 04:56:18PM +0000, Assaad, Sami (Sami) wrote:
> Hello,
>
> Is it normal that a 10G NIC interface, supporting the 82599 Ethernet Controller, configured as PCI Pass-through for a virtual machine using DPDK, reports 64 bytes per packet; no matter what the packet size?
>
That would not be expected behaviour, no.
AFAIK, the 82599 NIC counters should behave in the same way whether or not it is passed through
to a VM or used on a host.
> If so; I'm assuming this is to improve the performance of passing the network traffic to the VM. Is there a way to configure the NIC to properly present the proper byte count/packet?
>
I'm not sure what you mean here. I can't see how the reporting of byte-counts
would affect performance. Can you clarify what exactly you are seeing, and why
you think there is a performance benefit because of it?
/Bruce
> Thanks in advance.
>
> Best Regards,
> Sami.
next prev parent reply other threads:[~2015-06-29 9:18 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-06-26 16:56 Assaad, Sami (Sami)
2015-06-29 9:18 ` Bruce Richardson [this message]
2015-06-29 14:02 ` Assaad, Sami (Sami)
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