Struct ZernelTaskState 

pub struct ZernelTaskState {
    pub pid: u32,
    pub is_ml_process: bool,
    pub current_phase: WorkloadPhase,
    pub gpu_utilization: u8,
    pub last_gpu_sync_ns: u64,
    pub cpu_burst_duration_ns: u64,
    pub io_wait_fraction: f32,
    pub nccl_active: bool,
    pub futex_wait_count: u32,
    pub gpu_id: Option<u32>,
    pub phase_time_ns: PhaseTimeAccumulator,
    pub phase_start_ns: u64,
}

Per-task state tracked by the Zernel scheduler.

Maintained in BPF maps at runtime; this Rust struct is the userspace mirror.

Fields

pid: u32

is_ml_process: bool

current_phase: WorkloadPhase

gpu_utilization: u8

GPU utilization percentage (0-100).

last_gpu_sync_ns: u64

Timestamp (ns) of last cudaDeviceSynchronize call.

cpu_burst_duration_ns: u64

Duration (ns) of the most recent CPU burst.

io_wait_fraction: f32

Fraction of time spent in I/O wait (0.0 - 1.0).

nccl_active: bool

Whether NCCL shared memory is mapped for this process.

futex_wait_count: u32

Recent futex wait count (high = collective coordination).

gpu_id: Option<u32>

GPU ID this task is primarily using (for NUMA affinity).

phase_time_ns: PhaseTimeAccumulator

Total time (ns) spent in each phase since tracking started.

phase_start_ns: u64

Timestamp (ns) when current phase began.

Implementations

impl ZernelTaskState

pub fn new(pid: u32) -> Self

pub fn transition_phase(&mut self, new_phase: WorkloadPhase, now_ns: u64)

Transition to a new phase, accumulating time in the old phase.

Trait Implementations

impl Clone for ZernelTaskState

fn clone(&self) -> ZernelTaskState

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ZernelTaskState

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for ZernelTaskState

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for ZernelTaskState

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.