Re: [Xen-devel] what's maximum speed setting for xen network?

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

On 23 Apr 2005, at 17:14, mukesh agrawal wrote:

> FWIW, I don't think this is the problem I'm running into. The reason 
> being that I don't think the workload I'm using is heavy enough to 
> trigger overflow. I'm sending 102 packets over the course of 2 
> seconds. Of these, 5 are dropped.
> Assuming the ring size is given by NETIF_RX_RING_SIZE (which is 
> defined to 256 in io/netif.h), I'm thinking that the drops can't be 
> attributed to overflow.
We also dynamically size the receive ring. It starts off small (8 
buffers) and is doubled in size every time packets may have been lost. 
It then slowly (linearly) shrinks when loss is not detected. The 
parameters for this are RX_MIN_TARGET and RX_MAX_TARGET in netfront.c 
-- currently they are not configurable at run-time, nor easily 
configurable at compile-time.
 -- Keir


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