PF from OpenBSD 4.5 available as patch for 8.1-STABLE?

[Holger Rauch]

Hi,

is there such a patch? The reason why I ask for it is:

I'm currently experiencing saturated network interfaces when using gigabit networking in conjunction with certain Linux driver<->NIC combos for Broadcom chips against the PF version shipped with FreeBSD 8.1 stable running on a HP ProLiant DL 180 G5 server.

The problem only occurs with high throughputs (at least 30 MBytes/sec) caused by scp/rsync. Up to now, I've come accross this issue with

 Broadcom Corporation NetLink BCM5787M Gigabit Ethernet PCI Express (rev 02) (tg3 driver in Linux)

and

Broadcom Corporation NetXtreme II BCM5709 Gigabit Ethernet (rev 20)
(bnx2 driver in Linux; this is used in various HP ProLiant servers)

But it doesn't occur with Intel chips and also not with this chip

Broadcom Corporation NetXtreme BCM5764M Gigabit Ethernet PCIe (rev 10)
(tg3 driver in Linux). With those NICs I can transfer 50-60 MBytes/sec via scp/rsync without any problem.

I've also tried different Linux kernel versions (2.6.26 and 2.6.32). Didn't make a difference.

On FreeBSD systems, I get around 22 MByte/sec when transferring files via scp. Furthermore, changing the PF rules from "modulate state" to "keep state" has also had a positive impact. I now workarounded the problem by changing all scp based cron jobs to rsync using ssh in conjunction with rsync's --bwlimit option.

Thanks in advance & kind regards,

    Holger


THE standard software for Aviation Authorities

**********************************************************************************************
IMPORTANT NOTICE / WICHTIGER HINWEIS
This communication contains information which is confidential and may also be privileged. It is for the 
exclusive use of the intended recipient(s). If you are not the intended recipient(s) please note that any 
distribution, copying or use of this communication or the information in it is strictly prohibited. If you have 
received this communication in error please notify us immediately by email or by telephone and then delete 
this email and any copies of it.
Diese E-Mail koennte vertrauliche und/oder rechtlich geschuetzte Informationen enthalten. Wenn Sie nicht 
der richtige Adressat sind oder diese E-Mail irrtuemlich erhalten haben, informieren Sie bitte sofort den 
Absender und vernichten Sie diese Mail. Das unerlaubte Kopieren sowie die unbefugte Weitergabe dieser 
Mail sind nicht gestattet.
**********************************************************************************************