[solved] pfSense (2.6.0 & 22.01 ) is very slow on Hyper-V

m0nji

just a theory:

on FreeBSD 13.0, RSC was removed completly from the kernel/system, thats why the sysctl's doesn't exist and so we do not have these problems?

on FreeBSD 12.3, RSC can't be disabled completly under some circumstances (drivers, nic's), thats why some people do see these problems?

if i interpret my values correctly, then even with RSC disabled, some packages hit RSC?! (321 packages) at least if "pkts" means packages ;)

EDIT: i think i will test tomorrow FreeBSD 12.2 (pfsense 2.5.x) and will see if RSC makes a difference there

hendryjl

@m0nji said in After Upgrade inter (V)LAN communication is very slow (on Hyper-V).:

EDIT: i think i will test tomorrow FreeBSD 12.2 (pfsense 2.5.x) and will see if RSC makes a difference there

I still have my image of 2.5.2 before I applied 2.6. I reverted to it when I first had my issues (before I ever tried disabling RSC on the Hyper-V virtual switches). I didn't see any issues. Later tonight I will revert to it again and see what the sysctls say.

stephenw10

RSC support wasn't added to hn(4) until 12.3 so I would expect to see no sysctls there.

The driver looks to try to use them based on the VNIC revision. I'm speculating that under some set of circumstances the driver/host/platform maybe trying and failing to use RSC even when it's disabled in the vswitch.

I'd like to check the sysctl and verbose boot logs from someone who is hitting this still with rsc seemingly disabled. Since we know they should be all zeros if it's actually disabled.

Steve

stephenw10

@m0nji said in After Upgrade inter (V)LAN communication is very slow (on Hyper-V).:

on FreeBSD 13.0, RSC was removed completly from the kernel/system, thats why the sysctl's doesn't exist and so we do not have these problems?

Ah, nope! It's because FreeBSD 13 is actually older than 12.3 and doesn't have any of the RSC support patches:
https://github.com/freebsd/freebsd-src/tree/releng/13.0/sys/dev/hyperv/netvsc

I would expect an 13-stable snapshot to fail the same way.

Steve

Bob.Dig

@stephenw10 said in After Upgrade inter (V)LAN communication is very slow (on Hyper-V).:

I'd like to check the sysctl and verbose boot logs from someone who is hitting this still with rsc seemingly disabled. Since we know they should be all zeros if it's actually disabled.

Steve

I would like to but I need description for dummies how to do it.

m0nji

@bob-dig just open the VM preview window, reboot and on the boot screen hit the "boot options" and select verbose boot

FreeBSD 12.3

root@freebsd123:~ # grep -i "rsc" /var/log/messages
Feb 25 08:48:02 freebsd123 kernel: hn0: hwcaps rsc: ip4 1 ip6 1
Feb 25 08:48:02 freebsd123 kernel: hn0: offload rsc: ip4 2, ip6 2
Feb 25 08:48:02 freebsd123 kernel: hn1: hwcaps rsc: ip4 1 ip6 1
Feb 25 08:48:02 freebsd123 kernel: hn1: offload rsc: ip4 2, ip6 2
Feb 25 08:48:02 freebsd123 kernel: hn2: hwcaps rsc: ip4 1 ip6 1
Feb 25 08:48:02 freebsd123 kernel: hn2: offload rsc: ip4 2, ip6 2

pfSense 2.6.0

[2.6.0-RELEASE][admin@pfSense.home.arpa]/root: grep -i "rsc" /var/log/system.log                
Feb 25 07:56:22 pfSense kernel: hn0: hwcaps rsc: ip4 1 ip6 1
Feb 25 07:56:22 pfSense kernel: hn0: offload rsc: ip4 2, ip6 2
Feb 25 07:56:22 pfSense kernel: hn1: hwcaps rsc: ip4 1 ip6 1
Feb 25 07:56:22 pfSense kernel: hn1: offload rsc: ip4 2, ip6 2
Feb 25 07:56:22 pfSense kernel: hn2: hwcaps rsc: ip4 1 ip6 1
Feb 25 07:56:22 pfSense kernel: hn2: offload rsc: ip4 2, ip6 2

Bob.Dig

@m0nji I tried this with 2.5.2. I don't see anything regarding rsc in the logs or OS Boot log.
Also where to put those commands in? If I try with putty, it gives my permission denied. In the WebUI there is no output as well.

So I guess not noob friendly enough.


Enter an option: 8

[2.5.2-RELEASE][admin@pfSense.home.arpa]/root: # grep -i "rsc" /var/log/messages                                      
#: Command not found.
[2.5.2-RELEASE][admin@pfSense.home.arpa]/root: grep -i "rsc" /var/log/system.log                                      
[2.5.2-RELEASE][admin@pfSense.home.arpa]/root: ~ # grep -i "rsc" /var/log/messages
/root: Permission denied.
[2.5.2-RELEASE][admin@pfSense.home.arpa]/root:

m0nji

@bob-dig i think your output is correct. you should not see anything RSC related on pfSense 2.5.x

This is what @stephenw10 said:
"RSC support wasn't added to hn(4) until 12.3 so I would expect to see no sysctls there."

Bob.Dig

This post is deleted!

m0nji

@bob-dig you missed a "."

hn.0 is probably the wan interface. you should also try hn.1, hn.2 and hn.3

EDIT: you already fixed your post ;) try it also for hn1, hn2 and hn3. it depends which hn adapter you use

EDIT2: if i understood it correctly, then none hn adapter should give you a value >0 if RSC is disabled. if it tells you a value >0 then the setting RSC disabled does not realy work

Bob.Dig

2.6:

SoftwareRscEnabled RscOffloadEnabled
------------------ -----------------
             False             False
             False             False
             False             False

grep -i "rsc" /var/log/system.log

Feb 25 13:18:24 pfSense kernel: hn0: hwcaps rsc: ip4 1 ip6 1
Feb 25 13:18:24 pfSense kernel: hn0: offload rsc: ip4 2, ip6 2
Feb 25 13:18:24 pfSense kernel: hn1: hwcaps rsc: ip4 1 ip6 1
Feb 25 13:18:24 pfSense kernel: hn1: offload rsc: ip4 2, ip6 2
Feb 25 13:18:24 pfSense kernel: hn2: hwcaps rsc: ip4 1 ip6 1
Feb 25 13:18:24 pfSense kernel: hn2: offload rsc: ip4 2, ip6 2

While "copying":

sysctl dev.hn.1.rx.0.rsc_drop
sysctl dev.hn.1.rx.0.rsc_pkts
sysctl dev.hn.2.rx.0.rsc_drop
sysctl dev.hn.2.rx.0.rsc_pkts

[2.6.0-RELEASE][root@pfSense.home.arpa]/root: sysctl dev.hn.1.rx.0.rsc_drop
dev.hn.1.rx.0.rsc_drop: 0
[2.6.0-RELEASE][root@pfSense.home.arpa]/root: sysctl dev.hn.1.rx.0.rsc_pkts
dev.hn.1.rx.0.rsc_pkts: 0
[2.6.0-RELEASE][root@pfSense.home.arpa]/root: sysctl dev.hn.2.rx.0.rsc_drop
dev.hn.2.rx.0.rsc_drop: 0
[2.6.0-RELEASE][root@pfSense.home.arpa]/root: sysctl dev.hn.2.rx.0.rsc_pkts
dev.hn.2.rx.0.rsc_pkts: 107

The last number constantly rises.

Everything stays the same for me if I re-enable rsc in Windows, no difference at all.

SoftwareRscEnabled RscOffloadEnabled
------------------ -----------------
              True             False
              True             False
              True             False

stephenw10

Hmm, so just to be clear you are seeing the RSC packets counter increment whether or not you have disabled RSC on the vswitch that interface is connected to?

That seems like a different result to those for whom disabling RSC solved the issue. And seems to support my conjecture...

Unclear what we can do about it though if that is the case. Yet.

Steve

Bob.Dig

@stephenw10 said in After Upgrade inter (V)LAN communication is very slow (on Hyper-V).:

Hmm, so just to be clear you are seeing the RSC packets counter increment whether or not you have disabled RSC on the vswitch that interface is connected to?

True

Unclear what we can do about it though if that is the case. Yet.

I hope you guys figure it out.

stephenw10

Ok, so we need more data points here to be sure it's actually what's happening.

But assuming that's true it appears:
There's an issue with the RSC code added in FreeBSD.
In some situations the vswitches in hyper-v do not respect the disable RSC setting.

Steve

stephenw10

Ok, so it looks like our European friends in fact already hit this because they are actually building on 13-stable and came to the same conclusions. I have opened a bug report: https://redmine.pfsense.org/issues/12873

Steve

stephenw10

What do you guys see for these sysctls?:

dev.hn.0.hwassist: 607<CSUM_IP,CSUM_IP_UDP,CSUM_IP_TCP,CSUM_IP6_UDP,CSUM_IP6_TCP>
dev.hn.0.caps: 7ff<VLAN,MTU,IPCS,TCP4CS,TCP6CS,UDP4CS,UDP6CS,TSO4,TSO6,HASHVAL,UDPHASH>
dev.hn.0.ndis_version: 6.30
dev.hn.0.nvs_version: 393217

Please report whether or not you're hitting the issue with the values shown.

Bob.Dig

@stephenw10 Hittin it hard

sysctl dev.hn.0.hwassist
sysctl dev.hn.0.caps
sysctl dev.hn.0.ndis_version
sysctl dev.hn.0.nvs_version

2.5.2
dev.hn.0.hwassist: 1617<CSUM_IP,CSUM_IP_UDP,CSUM_IP_TCP,CSUM_IP_TSO,CSUM_IP6_UDP,CSUM_IP6_TCP,CSUM_IP6_TSO>
dev.hn.0.caps: 7ff<VLAN,MTU,IPCS,TCP4CS,TCP6CS,UDP4CS,UDP6CS,TSO4,TSO6,HASHVAL,UDPHASH>
dev.hn.0.ndis_version: 6.30
dev.hn.0.nvs_version: 327680

2.6.0
dev.hn.0.hwassist: 607<CSUM_IP,CSUM_IP_UDP,CSUM_IP_TCP,CSUM_IP6_UDP,CSUM_IP6_TCP>
dev.hn.0.caps: 7ff<VLAN,MTU,IPCS,TCP4CS,TCP6CS,UDP4CS,UDP6CS,TSO4,TSO6,HASHVAL,UDPHASH>
dev.hn.0.ndis_version: 6.30
dev.hn.0.nvs_version: 393217

Although this time I haven't deactivated RSC in Windows Host.

m0nji

@stephenw10

RSC disabled on Hyper-V Host

PS C:\Users\m0nji\Downloads\iperf-3.1.3-win64\iperf-3.1.3-win64> .\iperf3.exe -c 192.168.187.11 -R
Connecting to host 192.168.187.11, port 5201
Reverse mode, remote host 192.168.187.11 is sending
[  4] local 192.168.189.10 port 49995 connected to 192.168.187.11 port 5201
[ ID] Interval           Transfer     Bandwidth
[  4]   0.00-1.00   sec  55.6 KBytes   454 Kbits/sec
[  4]   1.00-2.01   sec  21.4 KBytes   174 Kbits/sec
[  4]   2.01-3.00   sec  21.4 KBytes   176 Kbits/sec
[  4]   3.00-4.00   sec  21.4 KBytes   175 Kbits/sec
[  4]   4.00-5.00   sec  17.1 KBytes   140 Kbits/sec
[  4]   5.00-6.00   sec  21.4 KBytes   175 Kbits/sec
[  4]   6.00-7.00   sec  21.4 KBytes   175 Kbits/sec
[  4]   7.00-8.01   sec  15.7 KBytes   128 Kbits/sec
[  4]   8.01-9.00   sec  20.0 KBytes   165 Kbits/sec
[  4]   9.00-10.00  sec  21.4 KBytes   175 Kbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bandwidth
[  4]   0.00-10.00  sec   384 KBytes   314 Kbits/sec                  sender
[  4]   0.00-10.00  sec   237 KBytes   194 Kbits/sec                  receiver

iperf Done.

pfSense 2.6.0 (hitting the issue)

dev.hn.0.hwassist: 607<CSUM_IP,CSUM_IP_UDP,CSUM_IP_TCP,CSUM_IP6_UDP,CSUM_IP6_TCP>
dev.hn.0.caps: 7ff<VLAN,MTU,IPCS,TCP4CS,TCP6CS,UDP4CS,UDP6CS,TSO4,TSO6,HASHVAL,UDPHASH>
dev.hn.0.ndis_version: 6.30
dev.hn.0.nvs_version: 393217
dev.hn.1.hwassist: 607<CSUM_IP,CSUM_IP_UDP,CSUM_IP_TCP,CSUM_IP6_UDP,CSUM_IP6_TCP>
dev.hn.1.caps: 7ff<VLAN,MTU,IPCS,TCP4CS,TCP6CS,UDP4CS,UDP6CS,TSO4,TSO6,HASHVAL,UDPHASH>
dev.hn.1.ndis_version: 6.30
dev.hn.1.nvs_version: 393217
dev.hn.2.hwassist: 607<CSUM_IP,CSUM_IP_UDP,CSUM_IP_TCP,CSUM_IP6_UDP,CSUM_IP6_TCP>
dev.hn.2.caps: 7ff<VLAN,MTU,IPCS,TCP4CS,TCP6CS,UDP4CS,UDP6CS,TSO4,TSO6,HASHVAL,UDPHASH>
dev.hn.2.ndis_version: 6.30
dev.hn.2.nvs_version: 393217

for comparision FreeBSD 12.3 (hitting the issue)

dev.hn.0.hwassist: 17<CSUM_IP,CSUM_IP_UDP,CSUM_IP_TCP,CSUM_IP_TSO>
dev.hn.0.caps: 7ff<VLAN,MTU,IPCS,TCP4CS,TCP6CS,UDP4CS,UDP6CS,TSO4,TSO6,HASHVAL,UDPHASH>
dev.hn.0.ndis_version: 6.30
dev.hn.0.nvs_version: 393217
dev.hn.1.hwassist: 17<CSUM_IP,CSUM_IP_UDP,CSUM_IP_TCP,CSUM_IP_TSO>
dev.hn.1.caps: 7ff<VLAN,MTU,IPCS,TCP4CS,TCP6CS,UDP4CS,UDP6CS,TSO4,TSO6,HASHVAL,UDPHASH>
dev.hn.1.ndis_version: 6.30
dev.hn.1.nvs_version: 393217
dev.hn.2.hwassist: 17<CSUM_IP,CSUM_IP_UDP,CSUM_IP_TCP,CSUM_IP_TSO>
dev.hn.2.caps: 7ff<VLAN,MTU,IPCS,TCP4CS,TCP6CS,UDP4CS,UDP6CS,TSO4,TSO6,HASHVAL,UDPHASH>
dev.hn.2.ndis_version: 6.30
dev.hn.2.nvs_version: 393217

FreeBSD 13.0 (not hitting the issue but obviously not STABLE version)

dev.hn.0.hwassist: 17<CSUM_IP,CSUM_IP_UDP,CSUM_IP_TCP,CSUM_IP_TSO>
dev.hn.0.caps: 7ff<VLAN,MTU,IPCS,TCP4CS,TCP6CS,UDP4CS,UDP6CS,TSO4,TSO6,HASHVAL,UDPHASH>
dev.hn.0.ndis_version: 6.30
dev.hn.0.nvs_version: 327680
dev.hn.1.hwassist: 17<CSUM_IP,CSUM_IP_UDP,CSUM_IP_TCP,CSUM_IP_TSO>
dev.hn.1.caps: 7ff<VLAN,MTU,IPCS,TCP4CS,TCP6CS,UDP4CS,UDP6CS,TSO4,TSO6,HASHVAL,UDPHASH>
dev.hn.1.ndis_version: 6.30
dev.hn.1.nvs_version: 327680
dev.hn.2.hwassist: 17<CSUM_IP,CSUM_IP_UDP,CSUM_IP_TCP,CSUM_IP_TSO>
dev.hn.2.caps: 7ff<VLAN,MTU,IPCS,TCP4CS,TCP6CS,UDP4CS,UDP6CS,TSO4,TSO6,HASHVAL,UDPHASH>
dev.hn.2.ndis_version: 6.30
dev.hn.2.nvs_version: 327680

Bob.Dig

I figured out an interim solution for me. I created two external Switches, one for pfSense and one for all the other VMs. With that it does work, no slow speed anymore. Drawback is, it is using one more port and everything goes through a physical Switch.

stephenw10

So that's no routing between VMs in the same host? That seems like it's what should trigger this.