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Date: Mon, 26 Oct 2009 15:54:13 +0200 (EET) From: "Ilpo Järvinen" <ilpo.jarvinen@...sinki.fi> To: Yair Gottdenker <yairgott@...il.com> cc: Netdev <netdev@...r.kernel.org> Subject: Re: Increasing TCP initial cwnd On Mon, 26 Oct 2009, Yair Gottdenker wrote: > I am working on research project to control the sender initial > congestion window size. I am trying to allow user space to set the > initial congestion window size but with no luck. The sender always > sends just 4 packets disregarding from the snd_cwnd. > > I am working on kernel version 2.6.31.3. > > I made the following changes: > 1. tcp_ipv4.c -> in function tcp_v4_init_sock, changed from > tp->snd_cwnd = 2 to tp->snd_cwnd = user_space_initial_cwnd. > 2. tcp_output.c -> tcp_init_cwnd - to always return user_space_initial_cwnd. > 3. tcp_cong.c -> tcp_slow_start- to always return user_space_initial_cwnd. > > Any help will be more than welcome. How about trying tcp_init_metrics in tcp_input.c? -- i. -- 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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