Date: Thu, 23 Apr 2015 00:43:20 -0700 From: hiren panchasara <hiren@strugglingcoder.info> To: Karlis Laivins <karlis.laivins@gmail.com> Cc: freebsd-net@freebsd.org Subject: Re: Testing Congestion Control Algorithms Message-ID: <20150423074320.GI28632@strugglingcoder.info> In-Reply-To: <CAF4H_7m0mUeHMCEPoXycJAHYXqqvvH3KaFZdH0c%2BpTsJnzUxwg@mail.gmail.com> References: <CAF4H_7m0mUeHMCEPoXycJAHYXqqvvH3KaFZdH0c%2BpTsJnzUxwg@mail.gmail.com>
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[-- Attachment #1 --] On 04/23/15 at 10:17P, Karlis Laivins wrote: > Hi, > > I am currently working on a modification of TCP NewReno congestion control > algorithm. It seems that I have been able to write a working module. > > Now, I am looking for a way to test the performance of the built-in > congestion control algorithms and the new algorithm. I have heard about the > NS-2 simulator, and I am trying to compile and configure it now, but that's > just a statistical tool (from what I hear) and the results are far from > reality (please correct me, if I am wrong). > > Please recommend a tool or way I can test the performance of the congestion > control algorithm in a "real" environment (sender side - 2 Computers, one > connected to the wireless network, other to a wire, receiver - one PC, > running FTP server, both senders each sending a big file at the same time). > I would like to get comparable performance results from each of the > existing congestion control algorithm as well as the new one I have created > by modifying the NewReno algorithm. Comparing performance of different cc algorithms might be tricky as they are designed with different goals in mind. I suggest you stick with your modified newreno vs original newreno and see if your modifications are letting you do whatever that you have decided. You may want to look at dummynet(4). This can be a useful read http://info.iet.unipi.it/~luigi/papers/20091201-dummynet.pdf siftr(4) is a handy tool to have around to make sure your congestion control module is behaving the way you want. cheers, Hiren [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.22 (FreeBSD) iQF8BAEBCgBmBQJVOKKYXxSAAAAAAC4AKGlzc3Vlci1mcHJAbm90YXRpb25zLm9w ZW5wZ3AuZmlmdGhob3JzZW1hbi5uZXRBNEUyMEZBMUQ4Nzg4RjNGMTdFNjZGMDI4 QjkyNTBFMTU2M0VERkU1AAoJEIuSUOFWPt/lnvcH/1NjmwhKOjhqUqWIBHlH9VsO L9Hq3RMo6wol7jTth24HdeJjAQsON5Q/fbQaPVyoJu5KfFgahvL5ibmQQ3MeUQfE UhxvSUx3m9wSdDRRMAcO7YLIhPQD2Ui6npQiK2MtQ1cg+esYWJ6Usz7XTvvYKqOi Gv9BYN26zBZ+IrJzHs6Sbvuo5l37G+ulVN4pNtu4dkcCjSG8an6jgE9p6/bDD9BG MyDlf8OYs3zdGAk/U1w6bVQiAFZZY85shR7EgFFQb1rToq8g79WaOl9GVr5sGTuY Mr7n7okA1Vyp/cKUQwNgk15R9xhHAeWQK0qkscaSH7JpKZHUtqbL0nFHcVZBaqA= =SXoJ -----END PGP SIGNATURE-----
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