[<prev] [next>] [thread-next>] [day] [month] [year] [list]
Message-ID: <CADAe=+KJ2QuL7ZdrfDWQe8R1vF_r_bu3QBS-5kwZBgQ21QTMtg@mail.gmail.com>
Date: Thu, 25 Oct 2012 23:16:56 +0530
From: Ajith Adapa <adapa.ajith@...il.com>
To: netdev@...r.kernel.org
Subject: Regarding bottlenecks for high speed packet generation
Hi,
I am trying out a sample application written based on packet_mmap to
generate packets at line rates. I am using 3.4.10 kernel and a gigabit
nic card.
I have found some strange issues as mentioned below.
When I am transmitting packets sized 1500 bytes the socket buffers are
easily filled up eventhough if I increase the value of wmem_default
and wmem_max.
The memory I have allotted can fit around 14k packets of 1500 bytes
size. Is the NIC card not able to transmit them ?? How can I check it
??
I have even increased the Hardware tx queue size of NIC card from 256
to 4096 using ethtool.
Does traffic control causing any issue as I read it wont allow traffic bursts ?
Is there any way to find the major bottlenecks that would really cause
problems in high-speed packet generation.
Regards,
Ajith
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Powered by blists - more mailing lists