On Thu, Apr 13, 2023, at 2:45 PM, Stuart Henderson wrote: > On 2023/04/13 13:30, Brian Conway wrote: >> 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)? > > Is it a 2-cpu machine?
Ah, you're right. The level of detail I provided was insufficient. >> Also, >> https://www.mouser.com/pdfdocs/Intel_82574L_82574IT_GbE_Controller_brief.pdf >> indicates that the 82574L should have 2 queues? > > No msix in your dmesg excerpt for that one I'll lug that one back out and take a look. Probably safe to assume a misunderstanding on my part. Thanks. -b
