Frank
1b373f3559
The 2026-09-11 trade bought a vendor-claimed 13-16% prefill figure that was never measured here; the 2026-10-18 research (same decision record) shows what identity mode actually costs the iGPU is the 1:1 page walk plus ATS/PRI/PASID/ GCR3 -- worth 2-4% on this silicon class, and removable outright by AMD PerfOpt when the distro ships Linux 7.4. Meanwhile pt is what err=-19 asks for: the XDNA2 NPU binds its own IOPT_TYPE_SVA domain and only needs the IOMMU enabled. Measured off-vs-pt prefill arms follow in the docs commit; frank-archon (Dankserver) is untouched.
44 lines
1.8 KiB
Plaintext
44 lines
1.8 KiB
Plaintext
# If you change this file or any /etc/default/grub.d/*.cfg file,
|
|
# run 'update-grub' afterwards to update /boot/grub/grub.cfg.
|
|
# For full documentation of the options in these files, see:
|
|
# info -f grub -n 'Simple configuration'
|
|
|
|
GRUB_DEFAULT=0
|
|
GRUB_TIMEOUT_STYLE=hidden
|
|
GRUB_TIMEOUT=0
|
|
GRUB_DISTRIBUTOR=`( . /etc/os-release && echo ${NAME} )`
|
|
# Identity (passthrough) DMA since 2026-10-18: the IOMMU stays enabled, so the
|
|
# XDNA2 NPU (/dev/accel/accel0, PASID/SVA) is usable again, while the iGPU's DMA
|
|
# runs untranslated. Decided in serverAppConfigs-docs/LLM/
|
|
# dankclaw-iommu-translation-off.md; install with scripts/set-dankclaw-bootline.sh.
|
|
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash iommu=pt"
|
|
|
|
# If your computer has multiple operating systems installed, then you
|
|
# probably want to run os-prober. However, if your computer is a host
|
|
# for guest OSes installed via LVM or raw disk devices, running
|
|
# os-prober can cause damage to those guest OSes as it mounts
|
|
# filesystems to look for things.
|
|
#GRUB_DISABLE_OS_PROBER=false
|
|
|
|
# Uncomment to enable BadRAM filtering, modify to suit your needs
|
|
# This works with Linux (no patch required) and with any kernel that obtains
|
|
# the memory map information from GRUB (GNU Mach, kernel of FreeBSD ...)
|
|
#GRUB_BADRAM="0x01234567,0xfefefefe,0x89abcdef,0xefefefef"
|
|
|
|
# Uncomment to disable graphical terminal
|
|
#GRUB_TERMINAL=console
|
|
|
|
# The resolution used on graphical terminal
|
|
# note that you can use only modes which your graphic card supports via VBE/GOP/UGA
|
|
# you can see them in real GRUB with the command `videoinfo'
|
|
#GRUB_GFXMODE=640x480
|
|
|
|
# Uncomment if you don't want GRUB to pass "root=UUID=xxx" parameter to Linux
|
|
#GRUB_DISABLE_LINUX_UUID=true
|
|
|
|
# Uncomment to disable generation of recovery mode menu entries
|
|
#GRUB_DISABLE_RECOVERY="true"
|
|
|
|
# Uncomment to get a beep at grub start
|
|
#GRUB_INIT_TUNE="480 440 1"
|