Success DVA3219 (Denverton) with RTL8156B, DSM 7.0.1, driver 2.15.0-4 works fine in one direction

[ossource]

Description of the problem

PC -> NAS : 115MB/s
NAS-> PC: 240MB/S

I know the cards are not on the tested list, yet.

Description of your products

DVA3219
- and output of uname -a command

Linux 4.4.180+ #42218 SMP Fri CST 2021 x86_64 GNU/Linux synology_denverton_dva3219

DSM version 7.0.1 - "42218"
Noname USB 3.0 Ethernet Adapter Net work Card Hub 2500Mbps 2.5G RJ45 Lan Adapter Laptop

Description of your environment

• connect using a hub
  • PC: NIC model - PCIE Karte 2.5Gbps Gigabit 10/100/1000Mbps RTL8125B RJ45 Ethe Q5Y1
  • Hub: Trendnet TEG 5350
  • cable Cat.6

Output of dmesg command

[   65.728592] usb 2-3: reset SuperSpeed USB device number 2 using xhci_hcd
[   69.957008] fuse init (API version 7.23)
[   72.820682] tcmu daemon: command reply support 1.
[   76.454612] netif_napi_add() called with weight 256 on device eth%d
[   76.461337] r8152 2-3:1.0 eth4: v2.15.0 (2021/04/15)
[   76.466453] r8152 2-3:1.0 eth4: This product is covered by one or more of the following patents:
                        US6,570,884, US6,115,776, and US6,327,625.

[   76.482160] r8152 2-3:1.0 eth4: chip rev 14
[   77.442275] Synotify use 16384 event queue size
[   80.684047] IPv6: ADDRCONF(NETDEV_UP): eth4: link is not ready
[   80.832367] IPv6: ADDRCONF(NETDEV_CHANGE): eth4: link becomes ready
[   80.838979] r8152 2-3:1.0 eth4: carrier on
[   82.139660] audit_printk_skb: **96 callbacks suppressed**
[   82.144871] audit: type=1325 audit(1634759966.775:44): table=nat family=2 entries=0
[   82.440013] audit: type=1325 audit(1634759967.075:45): table=filter family=2 entries=31
[   82.470124] audit: type=1325 audit(1634759967.105:46): table=filter family=10 entries=23
[   82.517229] audit: type=1325 audit(1634759967.152:47): table=filter family=2 entries=4
[   82.536137] audit: type=1325 audit(1634759967.171:48): table=filter family=2 entries=8
[   82.552966] audit: type=1325 audit(1634759967.188:49): table=filter family=2 entries=9
[   82.578567] audit: type=1325 audit(1634759967.214:50): table=filter family=2 entries=10
[   82.594638] audit: type=1325 audit(1634759967.230:51): table=filter family=2 entries=11
[   82.609732] audit: type=1325 audit(1634759967.245:52): table=filter family=2 entries=12
[   82.625046] audit: type=1325 audit(1634759967.260:53): table=filter family=2 entries=13

Output of lsusb command

|__usb2          1d6b:0003:0404 09  3.00 5000MBit/s 0mA 1IF  (Linux 4.4.180+ xhci-hcd xHCI Host Controller 0000:00:15.0) hub
  |__2-3         0bda:8156:3100 00  3.20 **5000MBit/s** 256mA 1IF  (Realtek USB 10/100/1G/2.5G LAN 001000001)

Output of ifconfig -a command

eth4      Link encap:Ethernet  HWaddr 00:E0:4C:68:02:4E
          inet addr:192.168.0.114  Bcast:192.168.0.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:5151007 errors:0 dropped:0 overruns:0 frame:0
          TX packets:2537166 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:7458333986 (6.9 GiB)  TX bytes:1941254379 (1.8 GiB)

Output of hdparm -t volume command

 hdparm -t /dev/mapper/cachedev_0

/dev/mapper/cachedev_0:
 Timing buffered disk reads: 1604 MB in  3.00 seconds = 534.03 MB/sec

[bb-qq]

Are you using the built-in Ethernet port at the same time? If you are, are the two ports configured for the same network segment?

[ossource]

2.5GbE adapter only, with two ports there would be routing issues ;)
I wait till SMB Multichannel will be supported in DSM7.1 :)

[bb-qq]

Ok, I understood there is no routing issue.

Increasing MTU to 9000 and setting the SMB protocol version to v3 may help to improve performance. Try it if you like.