Glossary#

PCPU#: Physical CPU. The actual hardware CPU core.
vCPU#: Virtual CPU presented to a guest VM; the hypervisor schedules vCPU execution on physical CPUs (PCPUs).
HV#: HVRTOS kernel deployed as a hypervisor at non-secure EL2. The hypervisor hosts guest VMs and native user-space processes in the non-secure world.
RTOS#: HVRTOS kernel deployed as a real-time operating system at EL1 or S-EL1 or Supervisor mode to host user-space processes in that world.
Secure world#: ARM TrustZone secure execution environment.
Non-secure world#: Normal execution environment outside TrustZone.
Secure application#: Software running at Exception Level 0 (S-EL0) in secure world.
Secure kernel#: Software running at Exception Level 1 (S-EL1) in secure world.
Sidekick#: Per-VM component running at Exception Level 1 in non-secure/secure world that handles VM traps, provides peripheral emulation drivers, and services hypervisor calls (HVC) from virtual machines.
Idle#: Unused CPU time.
TCU#: Tegra Combined UART. Multiplexed serial interface for debug output.
IVC#: Inter-VM Communication. Message-passing mechanism between partitions.
PCT#: Platform Configuration Table. Boot-time configuration data.
PMU#: Performance Monitoring Unit. ARM hardware performance counters.
SVC#: Supervisor Call. System call mechanism from user-space to kernel.
GIC#: Generic Interrupt Controller. ARM interrupt controller.
SGI#: Software Generated Interrupt. Interrupt IDs 0-15.
PPI#: Private Peripheral Interrupt. Interrupt IDs 16-31.
SPI#: Shared Peripheral Interrupt. Interrupt IDs 32-1023.
eventlib#: Event tracing library used for capturing system events.
NvLumos#: NVIDIA visualization tool for event traces.
Nsight#: NVIDIA performance analysis tool.
NvLog#: Text-based logging that is saved in persistent storage.
JTAG#: Joint Test Action Group. Hardware debugging interface using external probe.
Max-Proc-Time#: Maximum time a task may run in a single execution slice before the scheduler records a max-proc-time violation. The Debug Server proc command reports violation counts; PROC clears counters or sets the threshold.
VCPU Context#: Register state of a virtual CPU, including general purpose registers, program counter, stack pointer, and exception state.
Stack Trace#: Sequence of function call addresses representing the call chain at a point in time.
Boot Profiler#: Tool for capturing timestamped events during system boot.
VM Profiler#: Tool for sampling VM execution to analyze performance.
Debug Server#: User-space process that provides interactive debug console interface.
Shared Memory#: Memory region shared between kernel and user-space for debug data communication.
Event Mask#: Bitmask controlling which event groups are logged in event tracing.
Event Group#: Category of events (e.g., Core, Sched, Irq) used for filtering in event tracing.
Trace Buffer#: Memory region used for storing event traces.
Sequence ID#: Counter used in VM profiler to correlate samples and detect missed samples.
Carveout#: Reserved memory region with specific purpose (e.g., SMMU page tables, VM encryption).
Heap#: Dynamic memory allocation region.
BSS#: Block Started by Symbol. Uninitialized data segment.
Text Segment#: Executable code segment.
RO Segment#: Read-only data segment.
RW Segment#: Read-write data segment.
Blob#: Binary large object, typically CPIO archive containing additional data.