hasSyncBlockTime = true
		}
		if dt, ok := summary.RangeTime["GC mark assist"]; ok && dt > 0 {
			hasGCMarkAssistTime = true
		}
	}
	if !hasSchedWaitTime {
		t.Error("missing sched wait time")
	}
	if !hasSyncBlockTime {
		t.Error("missing sync block time")
	}
	if !hasGCMarkAssistTime {
		t.Error("missing GC mark assist time")
	}
}

	</tr>
	<tr>
		<td>Scheduler wait profile:</td>
		<td> <a href="/regionsched?{{$p}}">graph</a> <a href="/regionsched?{{$p}}&raw=1" download="sched.profile">(download)</a></td>
	</tr>
</table>
{{ end }}

<h3 id="breakdown">Breakdown</h3>

The table below breaks down where each goroutine is spent its time during the
traced period.

				{"sync.(*Cond).Signal", 0},
				{"main.main", 0},
			}},
			{trace.EventStateTransition, "Goroutine Running->Waiting", []frame{
				{"time.Sleep", 0},
				{"main.main", 0},
			}},
			{trace.EventMetric, "/sched/gomaxprocs:threads", []frame{
				{"runtime.startTheWorld", 0}, // this is when the current gomaxprocs is logged.
				{"runtime.startTheWorldGC", 0},
				{"runtime.GOMAXPROCS", 0},
				{"main.main", 0},
			}},
		}

//go:build linux

package syscall

import (
	"internal/itoa"
	"runtime"
	"unsafe"
)

// Linux unshare/clone/clone2/clone3 flags, architecture-independent,
// copied from linux/sched.h.
const (
	CLONE_VM             = 0x00000100 // set if VM shared between processes
	CLONE_FS             = 0x00000200 // set if fs info shared between processes

func getg() *g

// mcall switches from the g to the g0 stack and invokes fn(g),
// where g is the goroutine that made the call.
// mcall saves g's current PC/SP in g->sched so that it can be restored later.
// It is up to fn to arrange for that later execution, typically by recording
// g in a data structure, causing something to call ready(g) later.

		# MB stacks  estimated scannable stack size, or /gc/scan/stack:bytes
		# MB globals scannable global size, or /gc/scan/globals:bytes
		# P          number of processors used, or /sched/gomaxprocs:threads
	The phases are stop-the-world (STW) sweep termination, concurrent
	mark and scan, and STW mark termination. The CPU times
	for mark/scan are broken down in to assist time (GC performed in

	for i := range events {
		ev := &events[i]
		lastEv = ev

		// Process the event.
		switch ev.Kind() {
		case EventSync:
			seenSync = true
		case EventMetric:
			m := ev.Metric()
			if m.Name != "/sched/gomaxprocs:threads" {
				break
			}
			gomaxprocs := int(m.Value.Uint64())
			if len(ps) > gomaxprocs {
				if flags&UtilPerProc != 0 {
					// End each P's series.
					for _, p := range ps[gomaxprocs:] {

func (e Event) Metric() Metric {
	if e.Kind() != EventMetric {
		panic("Metric called on non-Metric event")
	}
	var m Metric
	switch e.base.typ {
	case go122.EvProcsChange:
		m.Name = "/sched/gomaxprocs:threads"
		m.Value = Value{kind: ValueUint64, scalar: e.base.args[0]}
	case go122.EvHeapAlloc:
		m.Name = "/memory/classes/heap/objects:bytes"
		m.Value = Value{kind: ValueUint64, scalar: e.base.args[0]}

type SingleTest struct {
	in  any
	out any
	err string
}

var singleTests = []SingleTest{
	{17, &testInt, ""},
	{float32(17.5), &testFloat32, ""},
	{"bike shed", &testString, ""},
	{[]string{"bike", "shed", "paint", "color"}, &testSlice, ""},
	{map[string]int{"seven": 7, "twelve": 12}, &testMap, ""},
	{[7]int{4, 55, 0, 0, 0, 0, 0}, &testArray, ""}, // case that once triggered a bug