From: David Miller <davem@davemloft.net>
To: eli@dev.mellanox.co.il
Cc: jheffner@psc.edu, linux-kernel@vger.kernel.org,
linux-net@vger.kernel.org
Subject: Re: UDP packets loss
Date: Thu, 16 Nov 2006 16:23:20 -0500 (EST) [thread overview]
Message-ID: <20061116.162320.28787779.davem@davemloft.net> (raw)
In-Reply-To: <62092.85.250.37.175.1163711408.squirrel@dev.mellanox.co.il>
From: eli@dev.mellanox.co.il
Date: Thu, 16 Nov 2006 23:10:08 +0200 (IST)
> >
> > BTW, TCP will be significantly faster than UDP because with UDP you
> > incur an extra full context switch on every packet.
> >
>
> Could you elaborate on this a bit more? What kind of context switch?
TCP queues and takes care of all the sending, packetization,
etc. handling asynchronously. Whereas with UDP every write()
results in a packet on the wire, packets are always emitted
synchronously in process context.
next prev parent reply other threads:[~2006-11-16 21:23 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <60157.89.139.64.58.1163542548.squirrel@dev.mellanox.co.il>
2006-11-16 18:51 ` eli
2006-11-16 19:01 ` John Heffner
2006-11-16 21:10 ` eli
2006-11-16 21:23 ` David Miller [this message]
2006-11-16 23:52 ` Alan
2006-11-17 14:48 ` Neil Horman
2006-11-14 22:15 eli
2006-11-14 22:35 ` Stephen Hemminger
2006-11-14 23:08 ` eli
2006-11-14 23:23 ` Stephen Hemminger
2006-11-15 13:03 ` Neil Horman
2006-11-14 23:14 ` Auke Kok
2006-11-15 21:57 ` John Heffner
2006-11-14 22:54 ` Richard B. Johnson
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