Struct Opts 

pub(crate) struct Opts {
    pub(crate) slice_us: u64,
    pub(crate) slice_lag_us: u64,
    pub(crate) primary_domain: Option<String>,
    pub(crate) exit_dump_len: u32,
    pub(crate) stats: Option<f64>,
    pub(crate) monitor: Option<f64>,
    pub(crate) verbose: bool,
    pub(crate) version: bool,
    pub(crate) help_stats: bool,
    pub libbpf: LibbpfOpts,
}

scx_cidland: a cid-based, topology-aware scheduler.

Rather than raw CPU numbers, this scheduler addresses CPUs by their cid (topological CPU ID), a dense id space where the CPUs of a core, of an LLC and of a NUMA node occupy contiguous ranges. Idle CPU selection is a plain range scan over a bitmap of idle cids, preferring a fully idle core in the LLC the task last ran on.

Tasks that can’t be dispatched to an idle cid are queued to a single shared DSQ, ordered by a virtual deadline that prioritizes tasks which sleep often and run in short bursts, and consumed by the first cid that runs out of work.

This requires a kernel with cid-form sched_ext support (struct sched_ext_ops_cid).

Fields

slice_us: u64

Time slice assigned to each task in microseconds.

slice_lag_us: u64

Maximum time slice credit, in microseconds, that a task can accumulate while sleeping.

Larger values give a bigger priority boost to tasks that sleep a lot, at the cost of fairness towards CPU intensive tasks.

primary_domain: Option<String>

Specifies a group of CPUs to be preferred when looking for an idle CPU.

Accepts a comma-separated list of CPUs or ranges (e.g. 0-3,8-11), or one of the following keywords:

“performance” = prioritize the fastest CPUs, “powersave” = prioritize the slowest CPUs, “turbo” = prioritize the CPUs with the highest max frequency, “all” = all CPUs assigned to the primary domain.

This is a preference, not an isolation mechanism: tasks still overflow to the other CPUs when the primary domain has nothing idle to offer.

By default all CPUs are used.

exit_dump_len: u32

Exit debug dump buffer length. 0 indicates default.

stats: Option<f64>

Enable stats monitoring with the specified interval.

monitor: Option<f64>

Run in stats monitoring mode with the specified interval. Scheduler is not launched.

verbose: bool

Enable verbose output, including libbpf details.

version: bool

Print scheduler version and exit.

help_stats: bool

Show descriptions for statistics.

libbpf: LibbpfOpts

Trait Implementations

impl Args for Opts

fn group_id() -> Option<Id>

Report the [ArgGroup::id][crate::ArgGroup::id] for this set of arguments

fn augment_args<'b>(__clap_app: Command) -> Command

Append to [Command] so it can instantiate Self via [FromArgMatches::from_arg_matches_mut]

fn augment_args_for_update<'b>(__clap_app: Command) -> Command

Append to [Command] so it can instantiate self via [FromArgMatches::update_from_arg_matches_mut]

impl CommandFactory for Opts

fn command<'b>() -> Command

Build a [Command] that can instantiate Self.

fn command_for_update<'b>() -> Command

Build a [Command] that can update self.

impl Debug for Opts

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

Formats the value using the given formatter.

impl FromArgMatches for Opts

fn from_arg_matches(__clap_arg_matches: &ArgMatches) -> Result<Self, Error>

Instantiate Self from [ArgMatches], parsing the arguments as needed.

fn from_arg_matches_mut( __clap_arg_matches: &mut ArgMatches, ) -> Result<Self, Error>

Instantiate Self from [ArgMatches], parsing the arguments as needed.

fn update_from_arg_matches( &mut self, __clap_arg_matches: &ArgMatches, ) -> Result<(), Error>

Assign values from ArgMatches to self.

fn update_from_arg_matches_mut( &mut self, __clap_arg_matches: &mut ArgMatches, ) -> Result<(), Error>

Assign values from ArgMatches to self.

impl Parser for Opts

fn parse() -> Self

Parse from std::env::args_os(), [exit][Error::exit] on error.

fn try_parse() -> Result<Self, Error>

Parse from std::env::args_os(), return Err on error.

fn parse_from<I, T>(itr: I) -> Self

where I: IntoIterator<Item = T>, T: Into<OsString> + Clone,

Parse from iterator, [exit][Error::exit] on error.

fn try_parse_from<I, T>(itr: I) -> Result<Self, Error>

where I: IntoIterator<Item = T>, T: Into<OsString> + Clone,

Parse from iterator, return Err on error.

fn update_from<I, T>(&mut self, itr: I)

where I: IntoIterator<Item = T>, T: Into<OsString> + Clone,

Update from iterator, [exit][Error::exit] on error.

fn try_update_from<I, T>(&mut self, itr: I) -> Result<(), Error>

where I: IntoIterator<Item = T>, T: Into<OsString> + Clone,

Update from iterator, return Err on error.