On 2024-02-22 11:10:44 [+0100], Jesper Dangaard Brouer wrote: > > Ethtool(eth1 ) stat: 14158562 ( 14,158,562) <= tx_packets /sec > > Ethtool(eth1 ) stat: 14158685 ( 14,158,685) <= tx_pkts_nic /sec > > > > looks like a small improvement… It is not your 15 but close. -t2 does > > improve the situation. > > You cannot reach 15Mpps on 10Gbit/s as wirespeed for 10G is 14.88Mpps. Oh, my bad. > Congratulations, I think this 14.15 Mpps is as close to wirespeed as it > possible on your hardware. > > BTW what CPU are you using? "Intel(R) Xeon(R) CPU E7-8890 v3 @ 2.50GHz" The "performance" governor is used, I lowered the number of CPUs and disabled SMT. > > There is a warning from DMA mapping code but ;) > > It is a warning from IOMMU code? > It usually means there is a real DMA unmap bug (which we should fix). Not sure, I don't think so: | ------------[ cut here ]------------ | ehci-pci 0000:00:1a.0: DMA addr 0x0000000105016ce8+8 overflow (mask ffffffff, bus limit 0). | WARNING: CPU: 0 PID: 1029 at kernel/dma/direct.h:105 dma_map_page_attrs+0x1e8/0x1f0 | RIP: 0010:dma_map_page_attrs+0x1e8/0x1f0 | Call Trace: | <TASK> | usb_hcd_map_urb_for_dma+0x1b0/0x4d0 | usb_hcd_submit_urb+0x342/0x9b0 | usb_start_wait_urb+0x50/0xc0 | usb_control_msg+0xc8/0x110 | get_bMaxPacketSize0+0x5a/0xb0 and USB isn't working. I *think* it is the "memory above 4G" thing, not sure where it took the wrong turn. > --Jesper Sebastian
