netdev - RE: Using ethernet device as efficient small packet generator

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Date:	Wed, 29 Dec 2010 20:11:48 -0500
From:	"Loke, Chetan" <Chetan.Loke@...scout.com>
To:	"Jon Zhou" <Jon.Zhou@...u.com>, <juice@...gman.org>,
	"Eric Dumazet" <eric.dumazet@...il.com>,
	"Stephen Hemminger" <shemminger@...tta.com>,
	<netdev@...r.kernel.org>
Subject: RE: Using ethernet device as efficient small packet generator

> -----Original Message-----
> From: netdev-owner@...r.kernel.org [mailto:netdev-
> owner@...r.kernel.org] On Behalf Of Jon Zhou
> Sent: December 23, 2010 3:58 AM
> To: juice@...gman.org; Eric Dumazet; Stephen Hemminger;
> netdev@...r.kernel.org
> Subject: RE: Using ethernet device as efficient small packet generator
> 
> 
> At another old kernel(2.6.16) with tg3 and bnx2 1G NIC,XEON E5450, I
> only got 490K pps(it is about 300Mbps,30% GE), I think the reason is
> multiqueue unsupported in this kernel.
> 
> I will do a test with 1Gb nic on the new kernel later.
> 


I can hit close to 1M pps(first time every time) w/ a 64-byte payload on
my VirtualMachine(running 2.6.33) via vmxnet3 vNIC - 


[root@...alhost ~]# cat /proc/net/pktgen/eth2
Params: count 0  min_pkt_size: 60  max_pkt_size: 60
     frags: 0  delay: 0  clone_skb: 0  ifname: eth2
     flows: 0 flowlen: 0
     queue_map_min: 0  queue_map_max: 0
     dst_min: 192.168.222.2  dst_max:
        src_min:   src_max:
     src_mac: 00:50:56:b1:00:19 dst_mac: 00:50:56:c0:00:3e
     udp_src_min: 9  udp_src_max: 9  udp_dst_min: 9  udp_dst_max: 9
     src_mac_count: 0  dst_mac_count: 0
     Flags:
Current:
     pkts-sofar: 59241012  errors: 0
     started: 1898437021us  stopped: 1957709510us idle: 9168us
     seq_num: 59241013  cur_dst_mac_offset: 0  cur_src_mac_offset: 0
     cur_saddr: 0x0  cur_daddr: 0x2dea8c0
     cur_udp_dst: 9  cur_udp_src: 9
     cur_queue_map: 0
     flows: 0
Result: OK: 59272488(c59263320+d9168) nsec, 59241012 (60byte,0frags)
  999468pps 479Mb/sec (479744640bps) errors: 0



Chetan
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