Subject: Re: LFS writes and network receive (too much splhigh?)
To: None <>
From: Jason Thorpe <>
List: tech-kern
Date: 10/22/2006 15:51:16
On Oct 22, 2006, at 3:28 PM, Thor Lancelot Simon wrote:

> So the reasonable inference, to me, really seems to be that LFS,  
> when it
> writes flat-out for 5 or 10 seconds at a time, is causing the network
> interrupts to not be serviced, which is what's causing TCP to back  
> off.

So, the next step is to determine a few pieces of info from the  
network driver:

1- How many packets are being serviced per interrupt?  When the rate  
drops, you should see this number go UP.  If it does not go up, then  
it means packets are not actually arriving, right?

2- Does the Ethernet chip ever report that a packet was dropped  
because the ring buffer filled up?

-- thorpej