Struct SyscallBreakdown 

pub struct SyscallBreakdown {
    pub mmap_us: u64,
    pub futex_us: u64,
    pub ioctl_us: u64,
    pub read_us: u64,
    pub write_us: u64,
    pub other_us: u64,
    pub total_us: u64,
}

Syscall breakdown categories per section 35.2

Fields

mmap_us: u64

mmap, munmap, mprotect, brk - Memory allocation overhead

futex_us: u64

futex - Thread contention

ioctl_us: u64

ioctl - CUDA driver overhead

read_us: u64

read, pread64, readv - I/O read bottleneck

write_us: u64

write, pwrite64, writev - I/O write bottleneck

other_us: u64

Other syscalls not categorized

total_us: u64

Total duration

Implementations

impl SyscallBreakdown

pub fn new() -> Self

Create a new empty breakdown

pub fn compute_us(&self) -> u64

Calculate compute time (total - all syscall overhead)

pub fn syscall_overhead_percent(&self) -> f64

Calculate syscall overhead percentage

pub fn dominant_syscall(&self) -> &'static str

Get the dominant syscall category

pub fn add_syscall(&mut self, syscall: &str, duration_us: u64)

Add syscall time to appropriate category

Uses saturating arithmetic to prevent integer overflow on extreme values.

pub fn as_otlp_attributes(&self) -> HashMap<String, u64>

Get breakdown as a map for OTLP attributes

Trait Implementations

impl Clone for SyscallBreakdown

fn clone(&self) -> SyscallBreakdown

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SyscallBreakdown

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

Formats the value using the given formatter.

impl Default for SyscallBreakdown

fn default() -> SyscallBreakdown

Returns the “default value” for a type.