Agent skill · NVIDIA
jetson-optimize-memory
Reclaim DRAM by disabling unused subsystems across MB1 BCT, MB2 BCT, kernel reserved-memory, and SWIOTLB. Use for headless or no-camera Jetson deployments; not for CPU/GPU frequency tuning.
What it needs
About 4k tokens when loaded.
What this skill does
jetson-optimize-memory Memory is reserved across four layers ordered by boot chronology (higher row = earlier in boot, closer to hardware): Layer Content Key files --- --- --- MB1 BCT firmware carveouts per-module misc DTS MB2 BCT firmware loading + AST controls per-module misc DTS Kernel DTS reserved-memory and driver binding per-module DTS SWIOTLB DMA bounce pool size <module>.conf.common (CMDLINEADD) Critical rules: Only the scenarios in Scenario recipes are validated. Refuse any request to disable a carveout/cluster/node not in that table. Zeroing a carveout requires both: disabling the cluster's loading controls AND removing the AST that references it. Emit explicit overrides for every cluster in the recipe, regardless of how the source #ifdef/#else looks. Verify the merged binary. GPU SW stack must match the chip: T234 -> nvgpu, T264 and later -> OpenRM. Follow the shared derived-platform rule in target-platform-contract.md; stop on mismatches instead of guessing. Do not set SWIOTLB to 0 — some peripherals can't use the IOMMU. --- Scenario recipes Keyword MB1 BCT carveouts MB2 BCT Kernel DTS --- --- --- --- headless DCE-family (see chip table) DCE auxpcontrols + DCE AST(s) display@<addr> (and dce@<addr> if exposed) → disabled no-camera RCE/VI/ISP-family RCE auxpcontrols (each instance) + RCE AST(s) recommended: VI/ISP/NVCSI → disabled Chip-specific carveouts Scenario T234 (Orin) T264 (Thor) --- --- --- headless CARVEOUTBPMPDCE, CARVEOUTDCE, CARVEOUTDCETSEC, CARVEOUTTSECDCE, CARVEOUTDISPEARLYBOOTFB CARVEOUTDCE, CARVEOUTTSECDCE, CARVEOUTHPSEDCE, CARVEOUTDISPEARLYBOOTFB no-camera CARVEOUTRCE, CARVEOUTCAMERATASKLIST CARVEOUTRCE, CARVEOUTRCE1, CARVEOUTRCERW, CARVEOUTVITASKLIST, CARVEOUTVI1TASKLIST, CARVEOUTISPTASKLIST, CARVEOUTISP1TASKLIST Post-boot: headless → sudo systemctl set-default multi-user.target. --- MB1 BCT carveout overrides File: LinuxforTegra/bootloader/generic/BCT/tegra<chip>-mb1-bct-misc-<module>.dts (e.g. …
How to use it
Reference it in AdaL, Claude Code, Cursor or any coding agent — nothing to install:
@skills NVIDIA/jetson-optimize-memory