From: "Alejandro Riveira Fernández" <ariveira@gmail.com>
To: "Adam McLaurin" <lkml@irotas.net>
Cc: linux-kernel@vger.kernel.org, netdev@vger.kernel.org
Subject: Re: Loopback and Nagle's algorithm
Date: Tue, 12 Apr 2011 11:42:10 +0200 [thread overview]
Message-ID: <20110412114210.65f202cc@varda> (raw)
In-Reply-To: <1302575869.13492.1440076201@webmail.messagingengine.com>
El Mon, 11 Apr 2011 22:37:49 -0400
"Adam McLaurin" <lkml@irotas.net> escribió:
Just CCing netdev
> I understand that disabling Nagle's algorithm via TCP_NODELAY will
> generally degrade throughput. However, in my scenario (150 byte
> messages, sending as fast as possible), the actual throughput penalty
> over the network is marginal (maybe 10% at most).
>
> However, when I disable Nagle's algorithm when connecting over loopback,
> the performance hit is *huge* - 10x reduction in throughput.
>
> The question is, why is disabling Nagle's algorithm on loopback so much
> worse w.r.t. throughput? Is there anything I can do to reduce the
> incurred throughput penalty?
>
> Thanks,
> Adam
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next prev parent reply other threads:[~2011-04-12 9:42 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-04-12 2:37 Loopback and Nagle's algorithm Adam McLaurin
2011-04-12 9:42 ` Alejandro Riveira Fernández [this message]
2011-04-12 9:45 ` Will Newton
2011-04-12 11:04 ` Adam McLaurin
2011-04-12 11:54 ` Jiri Kosina
2011-04-12 13:08 ` Eric Dumazet
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