[Winpcap-users] Winpcap and NIC chipsets

[Stuart Kendrick]

Hi Stefano,

Curious -- have you seen similar issues with Broadcom chipsets?

--sk

Stuart Kendrick
FHCRC

>>
>>
>> On 11/06/2013 08:57, Stefano Bonetti wrote:
>>> Hi all,
>>> we are using the Winpcap library inside a low-latency audio/visual
>>> streaming system named "LoLa"
>>> (http://www.conts.it/artistica/lola-project/lola-low-latency-audio-visual-streaming-system). 
>>>
>>>
>>> More precisely we are using Winpcap to send about 55300 packet per
>>> second with the pcap_sendqueue_queue and pcap_sendqueue_transmit
>>> commands; each packet is 1000 bytes in size and the Lan speed is 1Gbit.
>>> The system performs very well (so thanks for you great job) but we have
>>> noticed a different behavior using
>>> some network adapters. With the Realtek or Marvell chipsets we are able
>>> to send/receive only half of the packets,
>>> but when we use Intel NICs we are able to send and receive all the
>>> packets (no drops and with the network monitor
>>> showing, correctly, 98% of utilization); for our project it means that
>>> we are sending/receiving a video stream at
>>> 60fps (uncompressed RGB, 24bit, 640x480).
>>> The Intel chipsets are 82574 and 82579 … we have tested many computers
>>> with the same result and the same
>>> behavior occurs even using the MS Winsock libraries, so it does not 
>>> seem
>>> to be a problem related specifically to
>>> the winpcap library but generally to the NICs chipset.
>>>
>>> Has someone had similar experiences in the past or perhaps some
>>> suggestions on how to improve the network
>>> performance for Realtek/Marvell (or generally "low-cost") network 
>>> chipset?
>>>
>>> Thanks in advance,
>>> Stefano Bonetti
>>> LoLa team developer
>>> _______________________________________________
>>> Winpcap-users mailing list
>>> Winpcap-users at winpcap.org
>>> https://www.winpcap.org/mailman/listinfo/winpcap-users
>
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