From: Jesper Dangaard Brouer <brouer@redhat.com>
To: Eric Dumazet <eric.dumazet@gmail.com>
Cc: netdev@vger.kernel.org, Nandita Dukkipati <nanditad@google.com>
Subject: Re: [PATCH] tcp: sysctl for initial receive window
Date: Fri, 21 Sep 2012 19:34:33 +0200 [thread overview]
Message-ID: <1348248873.3103.57.camel@localhost> (raw)
In-Reply-To: <1348241111.2669.580.camel@edumazet-glaptop>
On Fri, 2012-09-21 at 17:25 +0200, Eric Dumazet wrote:
> On Fri, 2012-09-21 at 10:55 +0200, Jesper Dangaard Brouer wrote:
> > Make it possible to adjust the TCP default initial advertised receive
> > window, via sysctl /proc/sys/net/ipv4/tcp_init_recv_window.
> >
> > The window size is this value multiplied by the MSS of the connection.
> > The default value is (still) 10, as descibed in commit 356f039822b
> > (TCP: increase default initial receive window.)
> >
> > Allow minimum value of 1, but recommend against setting value below 2
> > in the documentation.
> >
> > Its possible to control/override this value per route table entry via
> > the iproute2 option initrwnd. Having the global default exported via
> > sysctl, helps determine the default setting, and make is easier to
> > adjust.
>
> I was wondering why its not symmetric :
>
> If we add a sysctl for initial receive window, we need another one for
> initial send window ?
Yes, that was also part of my plan (I just didn't have time to complete
it). I'll implement the sysctl for initial congestion window, next
week.
Just wanted some initial feedback, on if this sysctl approach is
acceptable or not.
--
Best regards,
Jesper Dangaard Brouer
MSc.CS, Sr. Network Kernel Developer at Red Hat
Author of http://www.iptv-analyzer.org
LinkedIn: http://www.linkedin.com/in/brouer
next prev parent reply other threads:[~2012-09-21 17:34 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-21 8:55 [PATCH] tcp: sysctl for initial receive window Jesper Dangaard Brouer
2012-09-21 15:25 ` Eric Dumazet
2012-09-21 17:34 ` Jesper Dangaard Brouer [this message]
2012-09-21 17:56 ` David Miller
2012-09-21 18:32 ` Jesper Dangaard Brouer
2012-09-21 18:48 ` David Miller
2012-09-26 11:53 ` Eric Dumazet
2012-10-01 22:36 ` Yuchung Cheng
2012-09-25 5:29 ` Jan Engelhardt
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