this is not ok. speed should be almost steady.. do you have another card to try?The iperf3 results shows between 1G to 4G connection
Yes, very similar for me too - cant get full 10Gbe on SM X8 system. after switching to X9, full 10Gbe saturated without any other changes.i had this case with limited lanes in a very legacy system.
This returns nothing. It's an X11 system with gen 6 Xeon so it's not what I would call "legacy".dmesg | grep -i limited
and look for your card pci id in lspci. i had this case with limited lanes in a very legacy system.
I've tried several cards. My X8 system seems to be my fastest....this is not ok. speed should be almost steady.. do you have another card to try?
Yes, very similar for me too - cant get full 10Gbe on SM X8 system. after switching to X9, full 10Gbe saturated without any other changes.
Yes I'm on the latest BIOS. I don't see any bifurcation settings in the BIOS. Not sure its supported on this board.are your BIOS at latest version? are you tried load BIOS defaults? are you configured any PCIe Bifurcation, that would limit PCIe count to card?
It is not something limited to legacy systems, but if that command resulted in nothing, I doubt it is the reason.This returns nothing. It's an X11 system with gen 6 Xeon so it's not what I would call "legacy".
$ lspci
..
3d:00.0 Non-Volatile memory controller: Sandisk Corp Device 5006
..
$ sudo lspci -s 3d:00.0 -vv | grep -i lnk
LnkCap: Port #0, Speed 8GT/s, Width x4, ASPM L1, Exit Latency L0s <256ns, L1 <8us
LnkCtl: ASPM L1 Enabled; RCB 64 bytes Disabled- CommClk+
LnkSta: Speed 8GT/s, Width x2, TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt-
LnkCtl2: Target Link Speed: 8GT/s, EnterCompliance- SpeedDis-
LnkSta2: Current De-emphasis Level: -6dB, EqualizationComplete+, EqualizationPhase1+
Yeah I plugged the "new" hardware directly into the same cables. However, I've tried multiple switch ports.Assuming everything is cabled the same (meaning the desktop workstation hardware is now using the same wiring as the former rack mount workstation hardware), it sure sounds like the issue is with the switch.
To verify, you could try connecting the two devices that you run iperf directly, ie without the switch.