FW: Why Ierrs is so high?

[Mao Shou Yan]

-----Original Message-----
From: Mao Shou Yan=20
Sent: 2005=C4=EA8=D4=C211=C8=D5 10:34
To: 'Dave+Seddon'
Subject: RE: Why Ierrs is so high?

I'm also using polling enable and set HZ to 10000, the CPU is p4 3.0G.
The system is 5.4 too.
My conf:
	kern.polling.enable=3D1
	kern.polling.burst_max=3D600
	kern.polling.each_burst=3D10
And also gots lots of kern.polling.lost_polls and kern.polling.suspect.

-----Original Message-----
From: owner-freebsd-net at freebsd.org =
[mailto:owner-freebsd-net at freebsd.org] On Behalf Of Dave+Seddon
Sent: 2005=C4=EA8=D4=C211=C8=D5 10:26
To: freebsd-net at freebsd.org
Subject: Re: Why Ierrs is so high?

Greetings,=20

Yeah I'd say there is something funny also.  I've stuffed around with HZ =
and=20
polling settings heaps and could only manage about 120MB/s-ish of HTTP=20
traffic.  I'm as running 5.4-stable from about 2-3 weeks ago.=20

/etc/sysctl.conf
kern.polling.enable=3D1
kern.polling.each_burst=3D50
#need to edit /usr/src/sys/kern/kern_poll.c for set this
kern.polling.burst_max=3D1500
#DO NOT SET THIS HIGHER THAN 65536 * 2 (FREEBSD BUG)
net.inet.tcp.sendspace=3D131072
net.inet.tcp.recvspace=3D131072
kern.random.sys.harvest.ethernet=3D0
kern.random.sys.harvest.interrupt=3D0
kern.ipc.somaxconn=3D1024=20

I still get lots of kern.polling.lost_polls and kern.polling.suspect.=20


How do you edit the RXD is 256, TXD is 256?
---> in /usr/src/sys/dev/em/if_em.h, the default is 256/256.

How do you view the errors when you set "sysctl hw.em0.stats=3D1"?=20
----> sysctl hw.em0.stats=3D1, then see it using dmesg.


Regards,
Dave=20


Mao Shou Yan writes:=20

> Hi, all,=20
>=20
> I have a machine with 3 Intel pro1000 cards.=20
>=20
> em0 is in promisc mode, whose MAC controller is 82543 using fiber line
> connected.=20
>=20
> em1, em2 is not connected with cable.=20
>=20
>          Driver configuration is the default, RXD is 256, TXD is 256.=20
>=20
>  =20
>=20
> Result of "netstat -i":=20
>=20
>  =20
>=20
> Name Mtu Network Address Ipkts Ierrs Opkts Oerrs Coll=20
> em0 1500 <Link#1> 00:03:47:de:72:36 1701943600 369823630 1 0 0=20
> em1 1500 <Link#2> 00:10:dc:56:8b:b5 5561 0 4608 0 0=20
> em2 1500 <Link#3> 00:03:47:42:6d:17 0 0 0 0 0=20
>=20
>  =20
>=20
> Pps of em0 is about 20k/pps, and bandwidth is no more than 150Mbps.=20
>=20
> When I use "sysctl hw.em0.stats=3D1", I found the number of "missed
> packets" is very high, which is about equal Ierrs.=20
>=20
> And I also found the number of"receive with no buffers"is raising with
> about 10 per second.=20
>=20
>  =20
>=20
> The machine is no extra load, only a raw system with em0 in promisc
> mode!=20
>=20
>  =20
>=20
>          I'm looking forward your help!=20
>=20
> _______________________________________________
> freebsd-net at freebsd.org mailing list
> http://lists.freebsd.org/mailman/listinfo/freebsd-net
> To unsubscribe, send any mail to "freebsd-net-unsubscribe at freebsd.org"
=20

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