Hi, man 4 ioat references ioatcontrol(8) in SEE ALSO but neither the manpage or executable for ioatcontrol exists. The man page also references /dev/ioat_test in the FILES section but that doesn't exist either. Context is FreeBSD 12.0-BETA2 #3 r339812 amd64 with GENERIC kernel ioat is loaded: [snip] > file /dev/ioat_test /dev/ioat_test: cannot open `/dev/ioat_test' (No such file or directory) > dmesg | grep ioat ioat0: <SNB IOAT Ch0> mem 0xc7d1c000-0xc7d1ffff irq 31 at device 4.0 numa-domain 0 on pci0 ioat0: Capabilities: 2f7<PQ,Extended_APIC_ID,Block_Fill,Move_CRC,DCA,Marker_Skipping,CRC,Page_Break> ioat1: <SNB IOAT Ch1> mem 0xc7d18000-0xc7d1bfff irq 39 at device 4.1 numa-domain 0 on pci0 ioat1: Capabilities: 2f7<PQ,Extended_APIC_ID,Block_Fill,Move_CRC,DCA,Marker_Skipping,CRC,Page_Break> ioat2: <SNB IOAT Ch2> mem 0xc7d14000-0xc7d17fff irq 31 at device 4.2 numa-domain 0 on pci0 ioat2: Capabilities: f7<Extended_APIC_ID,Block_Fill,Move_CRC,DCA,Marker_Skipping,CRC,Page_Break> ioat3: <SNB IOAT Ch3> mem 0xc7d10000-0xc7d13fff irq 39 at device 4.3 numa-domain 0 on pci0 ioat3: Capabilities: f7<Extended_APIC_ID,Block_Fill,Move_CRC,DCA,Marker_Skipping,CRC,Page_Break> ioat4: <SNB IOAT Ch4> mem 0xc7d0c000-0xc7d0ffff irq 31 at device 4.4 numa-domain 0 on pci0 ioat4: Capabilities: f7<Extended_APIC_ID,Block_Fill,Move_CRC,DCA,Marker_Skipping,CRC,Page_Break> ioat5: <SNB IOAT Ch5> mem 0xc7d08000-0xc7d0bfff irq 39 at device 4.5 numa-domain 0 on pci0 ioat5: Capabilities: f7<Extended_APIC_ID,Block_Fill,Move_CRC,DCA,Marker_Skipping,CRC,Page_Break> ioat6: <SNB IOAT Ch6> mem 0xc7d04000-0xc7d07fff irq 31 at device 4.6 numa-domain 0 on pci0 ioat6: Capabilities: f7<Extended_APIC_ID,Block_Fill,Move_CRC,DCA,Marker_Skipping,CRC,Page_Break> ioat7: <SNB IOAT Ch7> mem 0xc7d00000-0xc7d03fff irq 39 at device 4.7 numa-domain 0 on pci0 ioat7: Capabilities: f7<Extended_APIC_ID,Block_Fill,Move_CRC,DCA,Marker_Skipping,CRC,Page_Break> ioat8: <SNB IOAT Ch0> mem 0xfbf1c000-0xfbf1ffff irq 55 at device 4.0 numa-domain 1 on pci9 ioat8: Capabilities: 2f7<PQ,Extended_APIC_ID,Block_Fill,Move_CRC,DCA,Marker_Skipping,CRC,Page_Break> ioat9: <SNB IOAT Ch1> mem 0xfbf18000-0xfbf1bfff irq 63 at device 4.1 numa-domain 1 on pci9 ioat9: Capabilities: 2f7<PQ,Extended_APIC_ID,Block_Fill,Move_CRC,DCA,Marker_Skipping,CRC,Page_Break> ioat10: <SNB IOAT Ch2> mem 0xfbf14000-0xfbf17fff irq 55 at device 4.2 numa-domain 1 on pci9 ioat10: Capabilities: f7<Extended_APIC_ID,Block_Fill,Move_CRC,DCA,Marker_Skipping,CRC,Page_Break> ioat11: <SNB IOAT Ch3> mem 0xfbf10000-0xfbf13fff irq 63 at device 4.3 numa-domain 1 on pci9 ioat11: Capabilities: f7<Extended_APIC_ID,Block_Fill,Move_CRC,DCA,Marker_Skipping,CRC,Page_Break> ioat12: <SNB IOAT Ch4> mem 0xfbf0c000-0xfbf0ffff irq 55 at device 4.4 numa-domain 1 on pci9 ioat12: Capabilities: f7<Extended_APIC_ID,Block_Fill,Move_CRC,DCA,Marker_Skipping,CRC,Page_Break> ioat13: <SNB IOAT Ch5> mem 0xfbf08000-0xfbf0bfff irq 63 at device 4.5 numa-domain 1 on pci9 ioat13: Capabilities: f7<Extended_APIC_ID,Block_Fill,Move_CRC,DCA,Marker_Skipping,CRC,Page_Break> ioat14: <SNB IOAT Ch6> mem 0xfbf04000-0xfbf07fff irq 55 at device 4.6 numa-domain 1 on pci9 ioat14: Capabilities: f7<Extended_APIC_ID,Block_Fill,Move_CRC,DCA,Marker_Skipping,CRC,Page_Break> ioat15: <SNB IOAT Ch7> mem 0xfbf00000-0xfbf03fff irq 63 at device 4.7 numa-domain 1 on pci9 ioat15: Capabilities: f7<Extended_APIC_ID,Block_Fill,Move_CRC,DCA,Marker_Skipping,CRC,Page_Break> [/snip] thanks, -- J.