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all: type-safe time units

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Loïc Grégoire
2026-08-02 00:02:44 -04:00
parent 24372a2b4e
commit e36416304b
23 changed files with 137 additions and 61 deletions
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src/kern/sched.zig
+10 -10
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@@ -215,7 +215,7 @@ pub const Average = struct {
// Amount of the period that has been accounted for
period_contrib: usize,
/// Timestamp (us) up to which history has been accounted.
last_update: u64,
last_update: r.Microseconds,
};
pub const percpu = ke.CpuLocal(PerCpu, undefined);
@@ -242,8 +242,8 @@ fn pelt_do_decay(val: u64, n: u64) u64 {
}
fn pelt_update(avg: *Average, runnable: bool) void {
const now = ke.time.read_time() / std.time.ns_per_us;
const new_delta = now - avg.last_update;
const now = ke.time.read_time().to(r.Microseconds);
const new_delta = now.value - avg.last_update.value;
if (new_delta == 0) return;
@@ -318,8 +318,8 @@ fn pelt_update_td(td: *ke.Thread, cpu: ?*PerCpu, runnable: bool) void {
fn attach_load_avg(cpu: *PerCpu, td: *ke.Thread) void {
if (!tracks_load_avg(td)) return;
if (td.avg.last_update == 0) {
td.avg.last_update = ke.time.read_time() / std.time.ns_per_us;
if (td.avg.last_update.value == 0) {
td.avg.last_update = ke.time.read_time().to(r.Microseconds);
} else {
pelt_update_td(td, null, false);
}
@@ -470,7 +470,7 @@ pub fn block() void {
/// Block the currently running thread with its lock held.
pub fn block_locked(curtd: *ke.Thread) void {
curtd.state.store(.Blocked, .monotonic);
curtd.sleep_start = ke.time.read_time();
curtd.sleep_start = ke.time.read_time().value;
curtd.runq = null;
detach_load_avg(percpu.local(), curtd);
@@ -537,7 +537,7 @@ pub fn unblock_locked(td: *ke.Thread) void {
std.debug.assert(td.lock.is_locked());
std.debug.assert(td.state.load(.monotonic) == .Blocked);
const delta = (ke.time.read_time() - td.sleep_start) / std.time.ns_per_ms;
const delta = (ke.time.read_time().value - td.sleep_start) / std.time.ns_per_ms;
td.sleep_time += delta;
@@ -685,7 +685,7 @@ pub fn late_init() linksection(r.init) void {
balance_timer.init();
ke.timer.set(
&balance_timer,
balance_interval * std.time.ns_per_ms,
.from(r.Milliseconds.init(balance_interval)),
.{ .dpc = &balance_dpc },
);
}
@@ -1136,7 +1136,7 @@ fn pick_cpu(td: *ke.Thread) u32 {
var ran_recently = true;
if (td.sleep_start != 0) {
const delta = ke.time.read_time() - td.sleep_start;
const delta = ke.time.read_time().value - td.sleep_start;
// If we haven't been on this CPU in the last second, don't bother.
if (delta > std.time.ns_per_s) {
@@ -1455,5 +1455,5 @@ fn balance(_: *ke.Dpc, _: ?*anyopaque) void {
const offset = lcg.next() % balance_interval;
const ms = (balance_interval) + offset;
ke.timer.set(&balance_timer, ms * std.time.ns_per_ms, .{ .dpc = &balance_dpc });
ke.timer.set(&balance_timer, .from(r.Milliseconds.init(ms)), .{ .dpc = &balance_dpc });
}