DGX Kernel Settings and Parameters
Parameter Name |
Description |
Package Name |
Location |
|---|---|---|---|
ast.modeset=0 |
Disable the Aspeed display driver. The AST2xxx is the BMC used in our servers DGX-1 and DGX-2 |
nv-ast-modeset |
/etc/default/grub.d/nomodeset.cfg |
pci=realloc=on |
Allows kernel to reallocate PCI resources if allocations done by BIOS are insufficient. This and pcie_ports=native are both required for NVME hot-plug on DGX2. |
nv-enable-nvme-hot-plug |
/etc/default/grub.d/enable-nvme-hot-plug.cfg |
pcie_ports=native |
Use Linux native services for PME, AER, DPC, PCIe hotplug. I.e. not firmware first. This and pci=realloc=on are both required for NVME hot-plug on DGX2. |
nv-enable-nvme-hot-plug |
/etc/default/grub.d/enable-nvme-hot-plug.cfg |
transparent_hugepage=madvise |
Disable huge pages system-wide and only enable them inside MADV_HUGEPAGE madvise regions to prevent applications from allocating more memory resources than necessary. |
nv-hugepage |
/etc/default/grub.d/hugepage.cfg |
iommu=pt |
Enable pass through mode only and disable DMA translations. This enables optimizations for the CPU inside the DGX A100. |
nv-iommu-pt |
/etc/default/grub.d/iommu.cfg |
crashkernel |
Amount of memory to use for crash dumps. |
nvidia-crashdump |
/etc/default/grub.d/ipmisol.cfg |
console=ttyS[0-1],115200n8 |
Set console to serial port 0 or 1, using 115200 baud, no parity, 8 data bits For dgx-2, dgx-h100, dgx-h800: console=ttyS0,115200n8 Other system types: console=ttyS1,115200n8 |
nvidia-ipmisol |
kernel cmdline |
net.ipv4.conf.all.arp_announce = 2 |
Always use the best local address for this target |
nvidia-kernel-defaults |
/etc/sysctl.d/20-nvidia-defaults.conf |
net.ipv4.conf.default.arp_announce = 2 |
Always use the best local address for this target |
nvidia-kernel-defaults |
/etc/sysctl.d/20-nvidia-defaults.conf |
net.ipv4.conf.all.arp_ignore = 1 |
Only reply to ARP requests on the interface which contains the target IP address |
nvidia-kernel-defaults |
/etc/sysctl.d/20-nvidia-defaults.conf |
net.ipv4.conf.default.arp_ignore = 1 |
Only reply to ARP requests on the interface which contains the target IP address |
nvidia-kernel-defaults |
/etc/sysctl.d/20-nvidia-defaults.conf |
NVreg_EnablePCIERelaxedOrderingMode=1 |
Sets a reg-key to enable PCIe relaxed-ordering in the GPUs |
nvidia-relaxed-ordering-gpu |
/etc/modprobe.d/nvidia-relaxed-ordering.conf |