[dtrace-discuss] DTrace Network Provider

[Philip Beevers]

Hi Brendan,

My apologies if this is ground which has been covered before, but does
the proposed/prototype tcp provider let me easily detect retransmitted
segments? I'm guessing the tcp:::send probe will fire for both initial
transmission and any retransmission, but can we tell from the args
whether it's a retransmit?

At the moment it's possible, but hard, to work out which particular
connection on a machine is retransmitting (usually by wading through
snoop output) - it'd be nice if DTrace could lift the lid on this in the
same way that /usr/demo/dtrace/iosnoop.d instantly answers the perennial
"what is all that IO" question?

Again, apologies if this is covered elsewhere!

-- 

Philip Beevers
Fidessa Infrastructure Development

mailto:philip.beevers at fidessa.com
phone: +44 1483 206571
  

> -----Original Message-----
> From: dtrace-discuss-bounces at opensolaris.org 
> [mailto:dtrace-discuss-bounces at opensolaris.org] On Behalf Of 
> Brendan Gregg - Sun Microsystems
> Sent: 19 December 2007 21:33
> To: Roman Shaposhnik
> Cc: dtrace-discuss at opensolaris.org
> Subject: Re: [dtrace-discuss] DTrace Network Provider
> 
> G'Day Roman,
> 
> On Wed, Dec 19, 2007 at 12:22:58PM -0800, Roman Shaposhnik wrote:
> > Guys,
> > 
> > what's the official status of the DTrace Network 
> Provider(s). All of 
> > the information I can possibly find seems to be at least 
> half a year 
> > old. Any updates since Jun 2007?
> 
> Yes, it's been quiet again for a while, but fortunately I've 
> been updating the network provider page during the last few days:
> 
> http://www.opensolaris.org/os/community/dtrace/NetworkProvider/
> 
> There is now a 13 part plan to deliver customer-orientated 
> public and stable providers, and I'm getting ready to propose 
> part 1 (IP provider) as a PSARC case.  I'll post here and to 
> network-discuss about it soon.
> 
> Brendan
> 
> --
> Brendan
> [CA, USA]
> _______________________________________________
> dtrace-discuss mailing list
> dtrace-discuss at opensolaris.org
> 

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