em0 performance subpar

[Mike Tancsa]

On 4/28/2011 11:35 AM, Adam Stylinski wrote:
> 
> And the rate output of netblast (using as suggested the parameters above):
> 119091
> 
> This is about 454mbps.  Still way slower than it ought to be.
> 


Yes, it should do way better than that.  I just tried on a couple of
8.2R boxes,  E5320  @ 1.86GHz (1866.74-MHz K8-class CPU). Different em nic.

Sending side

netblast 192.168.5.110 500 450 6

start:             1304007166.789433976
finish:            1304007172.789605227
send calls:        2829340
send errors:       1374103
approx send rate:  242539
approx error rate: 0

em0: <Intel(R) PRO/1000 Network Connection 7.1.9> port 0x2000-0x201f mem
0xd8a00000-0xd8a1ffff irq 18 at device 0.0 on pci4
em0: Using an MSI interrupt
em0: [FILTER]
em0: Ethernet address: 00:30:48:33:53:cc

The receiving side sees
       em0
 Kbps in  Kbps out
    0.00      0.52
499822.2      0.00
931129.2      0.00
931126.8      0.00
931166.7      0.00
931064.4      0.00
931219.5      0.00
432451.5      0.00
    0.47      0.00






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-------------------
Mike Tancsa, tel +1 519 651 3400
Sentex Communications, mike at sentex.net
Providing Internet services since 1994 www.sentex.net
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