Reviving this thread, apologies for discontinuity in mail readers: https://marc.info/?t=165642193500008
After rebasing on 7.3, my results have mirrored Hrvoje's testing at the end of that thread. No issues with throughput, unusual latency, or reliability. `vmstat -i` shows some level of balancing between the queues. I've been testing on as many em(4) systems as I have access to, some manually, some in a packet forwarder/firewall scenarios: em0 at pci1 dev 0 function 0 "Intel I210" rev 0x03, msix, 2 queues, address 00:f1:f3:... em1 at pci2 dev 0 function 0 "Intel I210" rev 0x03, msix, 2 queues, address 00:f1:f3:... em2 at pci3 dev 0 function 0 "Intel I210" rev 0x03, msix, 2 queues, address 00:f1:f3:... em3 at pci4 dev 0 function 0 "Intel I210" rev 0x03, msix, 2 queues, address 00:f1:f3:... em4 at pci5 dev 0 function 0 "Intel I210" rev 0x03, msix, 2 queues, address 00:f1:f3:... em5 at pci6 dev 0 function 0 "Intel I210" rev 0x03, msix, 2 queues, address 00:f1:f3:... em0 at pci1 dev 0 function 0 "Intel I210" rev 0x03, msix, 4 queues, address 00:0d:b9:... em1 at pci2 dev 0 function 0 "Intel I210" rev 0x03, msix, 4 queues, address 00:0d:b9:... em2 at pci3 dev 0 function 0 "Intel I210" rev 0x03, msix, 4 queues, address 00:0d:b9:... em0 at pci1 dev 0 function 0 "Intel I211" rev 0x03, msix, 2 queues, address 00:0d:b9:... em1 at pci2 dev 0 function 0 "Intel I211" rev 0x03, msix, 2 queues, address 00:0d:b9:... em2 at pci3 dev 0 function 0 "Intel I211" rev 0x03, msix, 2 queues, address 00:0d:b9:... em0 at pci1 dev 0 function 0 "Intel 82574L" rev 0x00: msi, address 68:05:ca:... The only questions I have are around queue identification. All the specs I've been able to find indicate the I210 should have 4 queues, did Intel make a cheaper version with 2 toward the end of production? Or could it be an I211 masquerading as an I210 (and would that be bad for the driver)? Also, https://www.mouser.com/pdfdocs/Intel_82574L_82574IT_GbE_Controller_brief.pdf indicates that the 82574L should have 2 queues? Anyway, great work, please let me know if there's more I can do to help this move forward. Brian Conway Lead Software Engineer, Owner RCE Software, LLC
