// because they have global effect. It should also not call [B.Run].
//
// RunParallel reports ns/op values as wall time for the benchmark as a whole,
// not the sum of wall time or CPU time over each parallel goroutine.
func (b *B) RunParallel(body func(*PB)) {
	if b.N == 0 {
		return // Nothing to do when probing.
	}
	// Calculate grain size as number of iterations that take ~100µs.

	re(`-D([A-Za-z_][A-Za-z0-9_]*)(=[^@\-]*)?`),
	re(`-U([A-Za-z_][A-Za-z0-9_]*)`),
	re(`-F([^@\-].*)`),
	re(`-I([^@\-].*)`),
	re(`-O`),
	re(`-O([^@\-].*)`),
	re(`-W`),
	re(`-W([^@,]+)`), // -Wall but not -Wa,-foo.
	re(`-Wa,-mbig-obj`),
	re(`-Wp,-D([A-Za-z_][A-Za-z0-9_]*)(=[^@,\-]*)?`),
	re(`-Wp,-U([A-Za-z_][A-Za-z0-9_]*)`),
	re(`-ansi`),
	re(`-f(no-)?asynchronous-unwind-tables`),
	re(`-f(no-)?blocks`),

        /* metric description */ "status" /* metric label */);

auto* phase2_bridge_compilation_time = tsl::monitoring::Sampler<1>::New(
    {"/tensorflow/core/tf2xla/api/v1/phase2_compilation_time",
     "The wall-clock time spent on executing graphs in milliseconds.",
     "configuration"},
    // Power of 1.5 with bucket count 45 (> 23 hours)
    {tsl::monitoring::Buckets::Exponential(1, 1.5, 45)});

utilize multiple agents. With parallel pipelines you can measure the wall-clock time it takes for a set of changes to go from having been pushed to version control to being built, verified and deployed. The build cache's effect in this case can be measured in the reduction of the time developers have to wait for feedback from CI.

You can also measure the cumulative time your build agents spent building a changeset, which will give you a sense of the amount of work the CI infrastructure has to...

//
// It is safe to call concurrently with other operations.
func (l *gcCPULimiterState) limiting() bool {
	return l.enabled.Load()
}

// startGCTransition notifies the limiter of a GC transition.
//
// This call takes ownership of the limiter and disables all other means of
// updating the limiter. Release ownership by calling finishGCTransition.
//
// It is safe to call concurrently with other operations.

}

func (tools gccgoToolchain) link(b *Builder, root *Action, out, importcfg string, allactions []*Action, buildmode, desc string) error {
	sh := b.Shell(root)

	// gccgo needs explicit linking with all package dependencies,
	// and all LDFLAGS from cgo dependencies.
	afiles := []string{}
	shlibs := []string{}
	ldflags := b.gccArchArgs()
	cgoldflags := []string{}
	usesCgo := false
	cxx := false
	objc := false

// profile.
func (p *Profile) SetLabel(key string, value []string) {
	for _, sample := range p.Sample {
		if sample.Label == nil {
			sample.Label = map[string][]string{key: value}
		} else {
			sample.Label[key] = value
		}
	}
}

// RemoveLabel removes all labels associated with the specified key for all
// samples in the profile.

		measurements. Compare only with other /cpu/classes metrics.
		Sum of all metrics in /cpu/classes/scavenge.

	/cpu/classes/total:cpu-seconds
		Estimated total available CPU time for user Go code or the Go
		runtime, as defined by GOMAXPROCS. In other words, GOMAXPROCS
		integrated over the wall-clock duration this process has been
		executing for. This metric is an overestimate, and not directly

		// wall time spent in blockMutexN. Generally speaking, the total
		// contention time could be arbitrarily high when considering
		// OS scheduler delays, or any other delays from the environment:
		// time keeps ticking during these delays. By making the upper
		// bound proportional to the wall time in blockMutexN, in theory
		// we're accounting for all these possible delays.
		d := time.Duration(total)

// only to local times. Applying them to UTC times will use "UTC" as the
// time zone abbreviation, while strictly speaking those RFCs require the
// use of "GMT" in that case.
// When using the [RFC1123] or [RFC1123Z] formats for parsing, note that these
// formats define a leading zero for the day-in-month portion, which is not
// strictly allowed by RFC 1123. This will result in an error when parsing