Hi Patrick, I had the same results with you, and I was planning to report them as soon as I found some time. I have used Gerrit's tree, same configuration with you, and ended-up with the same results. I am currently using 2.6.20 with Ian's patches, and it performs well, as you have reported. Best, Burak ----- Original Message ---- From: Patrick <patrick.andrieux@xxxxxxxxx> To: Leandro Sales <leandroal@xxxxxxxxx>; DCCP Mailing List <dccp@xxxxxxxxxxxxxxx> Sent: Thursday, July 19, 2007 3:42:13 PM Subject: Re: iperf Hi, Quick question on iperf and kernel 2.6.22 (official and exp DCCP tree). I use 2 computers + 1 netembox in between Here are iperf cmd lines I use : on dccpServer : # iperf -s -Xdccp -l1424 on dccpClient : # iperf -c dccpServer -Xdccp -l1424 -t30 On 2.6.22 kernel: Without netem rate control, iperf result is about 95.0 Mbits/sec With netem rate control at 1024Kbits/sec, iperf result could be 10Kbits/sec or 30Kbits/sec... On 2.6.20 with Ian's patches: Without netem rate control, iperf result is about 95.0 Mbits/sec With netem rate control at 1024Kbits/sec, iperf result is about 950Kbits/sec. netem cmd lines: (I also tried with delay and loss turned on) tc qdisc add dev eth0 root handle 1:0 tbf rate 1024kbit buffer 10000 limit 30000 tc qdisc add dev eth1 root handle 1:0 tbf rate 1024kbit buffer 10000 limit 30000 Is anyone has a such low rate on 2.6.22 kernel? do you know why? regards, Patrick. On 17/07/07, Ian McDonald <ian.mcdonald@xxxxxxxxxxx> wrote: > On 7/18/07, ツ Leandro Sales <leandroal@xxxxxxxxx> wrote: > > Hi, > > > > I'm using iperf to make some DCCP tests and I'd like to know if it > > is possible to make iperf client (with -c option) transmit packets > > during certain duration and measure the throughput each x seconds. > > I've used -t 3 (for instance) option, but iperf just connect, send > > packets, show the results and finish its job. I'd like to continuous > > take instant throughput for each x seconds, how to do this? > > > > []s > > Leandro. > > From iperf --help > -i, --interval # seconds between periodic bandwidth reports > > I use this quite a bit and works perfectly. I've also modified iperf > to run continuously if you need that capability - available from my > web page. > > Ian > -- > Web: http://wand.net.nz/~iam4/ > Blog: http://iansblog.jandi.co.nz > WAND Network Research Group > - > To unsubscribe from this list: send the line "unsubscribe dccp" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > - To unsubscribe from this list: send the line "unsubscribe dccp" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html - To unsubscribe from this list: send the line "unsubscribe dccp" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
