Hello Mohammad, > I am still getting same small numbers for the throughput when testing > the network performance for the Raspberry pi with the TCP_STREAM,
the small TCP window size you observed seems to be the limiting factor. But I have no idea why the TCP connection throttles the window parameters in this way. Have you tried any of the following experiments to encircle the problem? * Different host machine * Different OS on your host machine. You mentioned that the problem does not occur when running OpenBSD in a VM on the host machine. How is the behavior when running OpenBSD natively on the host machine? * Different network equipment (network cables, switch) * Different Raspberry Pi * Different power supply for the Raspberry Pi * Performing the netperf test with Raspian > could you tell me please what you use in the client machine side, We run our nightly tests on Ubuntu 12.04.4 LTS (GNU/Linux 3.2.0-67-generic x86_64). Have you tried to follow (and possibly instrument) the lwIP code that is involved in the TCP parameter negotiation? Cheers Norman -- Dr.-Ing. Norman Feske Genode Labs http://www.genode-labs.com · http://genode.org Genode Labs GmbH · Amtsgericht Dresden · HRB 28424 · Sitz Dresden Geschäftsführer: Dr.-Ing. Norman Feske, Christian Helmuth ------------------------------------------------------------------------------ Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server from Actuate! Instantly Supercharge Your Business Reports and Dashboards with Interactivity, Sharing, Native Excel Exports, App Integration & more Get technology previously reserved for billion-dollar corporations, FREE http://pubads.g.doubleclick.net/gampad/clk?id=157005751&iu=/4140/ostg.clktrk _______________________________________________ genode-main mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/genode-main
