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Message-ID: <CAL8zT=jyzV6BwB6Lce0CCi+Z3MuwNsWLw2DQu8HBdm_J8kvArA@mail.gmail.com> Date: Thu, 5 Jan 2012 10:48:25 +0100 From: Jean-Michel Hautbois <jhautbois@...il.com> To: Eric Dumazet <eric.dumazet@...il.com> Cc: Rick Jones <rick.jones2@...com>, netdev@...r.kernel.org Subject: Re: TCP communication for raw image transmission 2012/1/5 Eric Dumazet <eric.dumazet@...il.com>: > Le jeudi 05 janvier 2012 à 10:13 +0100, Jean-Michel Hautbois a écrit : >> 2012/1/3 Rick Jones <rick.jones2@...com>: >> > On 01/02/2012 08:52 AM, Eric Dumazet wrote: >> >> >> >> Le lundi 02 janvier 2012 à 17:40 +0100, Jean-Michel Hautbois a écrit : >> >> >> >>> Mmmh, using netperf you would like to know what the client (my ARM >> >>> board) can do ? >> >>> How would you test it ? I can have an ARM board on one side, and the >> >>> x86 on the other... >> >>> >> >> >> >> x86> netserver& >> >> arm> netperf -H<arm_ip_address> -l 60 -t TCP_STREAM >> >> >> >> 1) check cpu usage on<arm> while test is running >> >> (for example : vmstat 1 ) >> >> 2) check bandwith of test run >> > >> > >> > The "&" at the end of the netserver command is (should be) redundant - >> > netserver will by default daemonize itself. >> > >> > I would suggest amending the netperf command line to something more like: >> > >> > netperf -H <x86IP> -c -l 60 -t TCP_STREAM -- -m <dataofoneline> -D >> >> I did it, and here are the results (when plugged directly between x86 >> and arm, and not throught the switch, as before) : >> / # netperf -H 192.168.0.1 -c -l 60 -t TCP_STREAM -- -m 1344 -D >> MIGRATED TCP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to >> 192.168.0.1 (192.168.0.1) port 0 AF_INET : nodelay >> Recv Send Send Utilization Service Demand >> Socket Socket Message Elapsed Send Recv Send Recv >> Size Size Size Time Throughput local remote local remote >> bytes bytes bytes secs. 10^6bits/s % S % U us/KB us/KB >> >> 87380 16384 1344 60.01 45.43 100.00 -1.00 180.325 -1.000 >> >> And without specifying the data size : >> / # netperf -H 192.168.0.1 -c -l 60 -t TCP_STREAM >> MIGRATED TCP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to >> 192.168.0.1 (192.168.0.1) port 0 AF_INET >> Recv Send Send Utilization Service Demand >> Socket Socket Message Elapsed Send Recv Send Recv >> Size Size Size Time Throughput local remote local remote >> bytes bytes bytes secs. 10^6bits/s % S % U us/KB us/KB >> >> 87380 16384 16384 60.01 61.94 99.98 -1.00 132.230 -1.000 >> >> This is far better than the first tests, but this means my best bet is >> to send as much data as possible (here, 16384)... >> I will do a benchmark with a little script which will test several >> frame sizes (or is there a way to know the theorical better value ?). >> Here is the result of this little benchmark : m=1024 MIGRATED TCP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 192.168.0.1 (192.168.0.1) port 0 AF_INET : nodelay Recv Send Send Utilization Service Demand Socket Socket Message Elapsed Send Recv Send Recv Size Size Size Time Throughput local remote local remote bytes bytes bytes secs. 10^6bits/s % S % U us/KB us/KB 87380 16384 1024 60.01 36.44 99.97 -1.00 224.722 -1.000 m=1344 MIGRATED TCP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 192.168.0.1 (192.168.0.1) port 0 AF_INET : nodelay Recv Send Send Utilization Service Demand Socket Socket Message Elapsed Send Recv Send Recv Size Size Size Time Throughput local remote local remote bytes bytes bytes secs. 10^6bits/s % S % U us/KB us/KB 87380 16384 1344 60.01 45.95 100.00 -1.00 178.279 -1.000 m=1460 MIGRATED TCP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 192.168.0.1 (192.168.0.1) port 0 AF_INET : nodelay Recv Send Send Utilization Service Demand Socket Socket Message Elapsed Send Recv Send Recv Size Size Size Time Throughput local remote local remote bytes bytes bytes secs. 10^6bits/s % S % U us/KB us/KB 87380 16384 1460 60.01 27.92 99.98 -1.00 293.382 -1.000 m=2048 MIGRATED TCP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 192.168.0.1 (192.168.0.1) port 0 AF_INET : nodelay Recv Send Send Utilization Service Demand Socket Socket Message Elapsed Send Recv Send Recv Size Size Size Time Throughput local remote local remote bytes bytes bytes secs. 10^6bits/s % S % U us/KB us/KB 87380 16384 2048 60.01 38.15 99.98 -1.00 214.705 -1.000 m=4096 MIGRATED TCP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 192.168.0.1 (192.168.0.1) port 0 AF_INET : nodelay Recv Send Send Utilization Service Demand Socket Socket Message Elapsed Send Recv Send Recv Size Size Size Time Throughput local remote local remote bytes bytes bytes secs. 10^6bits/s % S % U us/KB us/KB 87380 16384 4096 60.01 55.32 99.98 -1.00 148.070 -1.000 m=8192 MIGRATED TCP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 192.168.0.1 (192.168.0.1) port 0 AF_INET : nodelay Recv Send Send Utilization Service Demand Socket Socket Message Elapsed Send Recv Send Recv Size Size Size Time Throughput local remote local remote bytes bytes bytes secs. 10^6bits/s % S % U us/KB us/KB 87380 16384 8192 60.01 62.06 100.00 -1.00 132.000 -1.000 m=16384 MIGRATED TCP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 192.168.0.1 (192.168.0.1) port 0 AF_INET : nodelay Recv Send Send Utilization Service Demand Socket Socket Message Elapsed Send Recv Send Recv Size Size Size Time Throughput local remote local remote bytes bytes bytes secs. 10^6bits/s % S % U us/KB us/KB 87380 16384 16384 60.01 63.07 99.98 -1.00 129.865 -1.000 m=32768 MIGRATED TCP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 192.168.0.1 (192.168.0.1) port 0 AF_INET : nodelay Recv Send Send Utilization Service Demand Socket Socket Message Elapsed Send Recv Send Recv Size Size Size Time Throughput local remote local remote bytes bytes bytes secs. 10^6bits/s % S % U us/KB us/KB 87380 16384 32768 60.01 67.46 100.00 -1.00 121.428 -1.000 m is the size of the message, and there is clearly an effect of this value... > Could you test UDP_STREAM as well ? > > $ netperf -H 192.168.0.1 -l 10 -t UDP_STREAM > UDP UNIDIRECTIONAL SEND TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to > 192.168.0.1 (192.168.0.1) port 0 AF_INET > Socket Message Elapsed Messages > Size Size Time Okay Errors Throughput > bytes bytes secs # # 10^6bits/sec > > 1000000 65507 10.00 13398 0 702.12 > 110592 10.00 13398 702.12 It does not seem to work : netperf -H 192.168.0.1 -l 10 -t UDP_STREAM MIGRATED UDP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 192.168.0.1 (192.168.0.1) port 0 AF_INET Socket Message Elapsed Messages Size Size Time Okay Errors Throughput bytes bytes secs # # 10^6bits/sec 106496 65507 10.01 1836 0 0.00 419227124 0.00 536870912 0.00 Adding a "-c" gives the same : netperf -H 192.168.0.1 -c -l 10 -t UDP_STREAM MIGRATED UDP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 192.168.0.1 (192.168.0.1) port 0 AF_INET Socket Message Elapsed Messages CPU Service Size Size Time Okay Errors Throughput Util Demand bytes bytes secs # # 10^6bits/sec % SU us/KB 106496 65507 10.01 1835 0 0.0 96.10 50.250 536870912 2.25 1073741824 0.0 96.10 -1.000 Using ifconfig before and after and comparing the TX values I get 98Mbps... > Then, a pktgen test (this sends UDP frames, but from kernel land) might > give you the limit of the NIC... I need to recompile my kernel, as I don't have the CONFIG_NET_PKTGEN in this one... JM -- 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
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