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
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