Why Ierrs is so high?

[Dave+Seddon]

Greetings, 

Also, how were you measuring the packet and data rate?  What were you using 
to generate the traffic? 

I used /usr/ports/benchmark/siege and /usr/ports/www/thttpd. 

Regards,
Dave 

 

Mao Shou Yan writes: 

> Hi, all, 
> 
> I have a machine with 3 Intel pro1000 cards. 
> 
> em0 is in promisc mode, whose MAC controller is 82543 using fiber line
> connected. 
> 
> em1, em2 is not connected with cable. 
> 
>          Driver configuration is the default, RXD is 256, TXD is 256. 
> 
>   
> 
> Result of "netstat -i": 
> 
>   
> 
> Name Mtu Network Address Ipkts Ierrs Opkts Oerrs Coll 
> em0 1500 <Link#1> 00:03:47:de:72:36 1701943600 369823630 1 0 0 
> em1 1500 <Link#2> 00:10:dc:56:8b:b5 5561 0 4608 0 0 
> em2 1500 <Link#3> 00:03:47:42:6d:17 0 0 0 0 0 
> 
>   
> 
> Pps of em0 is about 20k/pps, and bandwidth is no more than 150Mbps. 
> 
> When I use "sysctl hw.em0.stats=1", I found the number of "missed
> packets" is very high, which is about equal Ierrs. 
> 
> And I also found the number of"receive with no buffers"is raising with
> about 10 per second. 
> 
>   
> 
> The machine is no extra load, only a raw system with em0 in promisc
> mode! 
> 
>   
> 
>          I'm looking forward your help! 
> 
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