The only tuning parameter is the interrupt throttling rate, but the driver
has to be modified to change this value. Also, the 6.4.1 driver is rather
old and all updates have been added to the 6.5.0 driver.


On 11-08-25 4:43 PM, "Mark Dowdy" <community-noreply@qnx.com> wrote:

> We're seeing intermittent packet delays, and packet loss in 'high traffic'
> situations, using the native io-pkt e1000 driver with the Intel 82576 Quad NIC
> (device ID 10c9h). Are there driver tuning parameters other than those listed
> in the on-line docs that could be relevant/helpful? If it matters, we're
> running our time critical traffic on a second instance of io-pkt using the
> following driver options:
> -opci=1,vid=0x8086,did=0x10c9,priority=32,receive=512,transmit=4096.
> 
> In our standard configuration, we have a master computer exchanging 4000
> packets per second with two peripherals (8000 packets total, 4000 in, 4000
> out). The packet loss occurs with both peripherals running. With only one
> peripheral connected, packet delays are seen but there's little/no packet
> loss. nicinfo is only showing non-zero counts on the "OK" lines; there are no
> non-zero error counts. The packets are fairly small, 103 bytes from the master
> to the peripherals, and 191 bytes from the peripherals to the master.
> 
> I'm not familiar with the driver internals but our code is running fine on QNX
> 6.4.1 with a different NIC, the Intel 80003ES2LAN (device ID 1096h). We're
> migrating to the 82576 due to hardware obsolescence. Could something funky be
> going on with the 82576 portion of the driver?
> 
> Thanks.
> 
> Mark
> 
> 
> 
> 
> _______________________________________________
> 
> Networking Drivers
> http://community.qnx.com/sf/go/post88379
> 
> 

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