lkml.org 
[lkml]   [2002]   [Jun]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: RFC: per-socket statistics on received/dropped packets


On Mon, 10 Jun 2002, Mark Mielke wrote:

> On Mon, Jun 10, 2002 at 08:24:44AM -0400, jamal wrote:
> > I think i would agree with Dave for it to be an external patch. You
> > really only need this during debugging. I had a similar patch when
> > debugging NAPI about a year ago. I didnt find it that useful after
> > a while because i could deduce the losses from SNMP/netstat output.
>
> In your case you found that you could solve it once by debugging the
> application.
>
> This doesn't mean that other applications would not be better at
> determining the code path to use at execution time.
>
> Just because eth1 is behaving perfectly (i.e. low overall dropped UDP
> packets, or low TCP/IP retransmission) does not mean that a specific
> socket currently on eth1 heading to China should assume that it can
> take the 'average' observation as adequate for observing the specific
> socket.
>
> There *are* applications that would benefit from making this decision
> at run time on a socket-by-socket basis. It is not a common requirement
> for most desktop users, but it remains a valid requirement.
>

I am confused as to which application needs this, do you have one in mind?
AFAIK, UDP/RTP type apps already know how to determine packet loss
on a per flow basis.

> Providing it as a patch, can have the effect that it becomes more trouble
> than it is worth to grant other people access to the feature, especially
> from a corporate environment that has signed off on being able to release
> patches made to Linux back to the Linux source tree.
>

You may be confusing technical merit to mean the same thing as corporate
donation. In Linux its the later that counts.

> Seems somewhat of a loss...

Your mileage may vary. Consider this - you have the opp to at least
make the patch available. Imagine trying to convince windriver.

cheers,
jamal

>

> mark
>
> --
> mark@mielke.cc/markm@ncf.ca/markm@nortelnetworks.com __________________________
> . . _ ._ . . .__ . . ._. .__ . . . .__ | Neighbourhood Coder
> |\/| |_| |_| |/ |_ |\/| | |_ | |/ |_ |
> | | | | | \ | \ |__ . | | .|. |__ |__ | \ |__ | Ottawa, Ontario, Canada
>
> One ring to rule them all, one ring to find them, one ring to bring them all
> and in the darkness bind them...
>
> http://mark.mielke.cc/
>

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 13:22    [W:0.989 / U:0.340 seconds]
©2003-2011 Jasper Spaans. Advertise on this site