Re: [ECOS] dropped UDP packets on 8270 PowerPC board

[Gary Thomas <gary at mlbassoc dot com>]

On Fri, 2006-01-27 at 09:37 -0500, Paul Randall wrote:
> Andrew Lunn wrote:
> 
> >On Mon, Jan 23, 2006 at 05:34:33PM -0500, Paul Randall wrote:
> >  
> >
> >>Andrew Lunn wrote:
> >>I tried setting a breakpoint in udp_usrreq.c but Insight would not let 
> >>me put a watch on the udpstat structure so I could not get a breakdown 
> >>of the bad packets.
> >>    
> >>
> >
> >Try a breakpoint at udp_usrreq.c:435.
> >
> >Otherwise just hit the stop button then take a look at cyg_udpstat and
> >cyg_ipstat.
> >
> >        Andrew
> >
> >  
> >
> Hi Andrew,
> 
> I ran my application for a few minutes during which time the application 
> detected 20 missing packets based on the sequence number.  Then I 
> stopped the debugger and looked at the cyg_udpstat and cyg_ipstat 
> structures.
> 
> For cyg_udpstat, the only non-zero counts were:
> ipackets 60278
> noportbcast 22
> opackets 1404
> 
> For cyg_ipstat the non-zero counts were:
> total 60278
> noproto 4
> delivered 60278
> localout 3868
> tooshort 1
> 
> The packets I am receiving (some of which are lost) are usually 1200 
> bytes long although a few are smaller.  The packets I am sending are 512 
> bytes long.
> 
> So I'm still at a loss as to where or why the packets are being 
> dropped.  Any other suggestions?

Are you running the debugger (RedBoot/GDB I assume) via serial or 
network?

-- 
------------------------------------------------------------
Gary Thomas                 |  Consulting for the
MLB Associates              |    Embedded world
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