无论是否轮流执行（并发），都需要相同的时间来完成，而你也会完成相同的工作量。

但在这种情况下，如果你能带上 8 名前收银员/厨师，现在是清洁工一起清扫，他们中的每一个人（加上你）都能占据房子的一个区域来清扫，你就可以在额外的帮助下并行的更快地完成所有工作。

在这个场景中，每个清洁工（包括您）都将是一个处理器，完成这个工作的一部分。

由于大多数执行时间是由实际工作（而不是等待）占用的，并且计算机中的工作是由 <abbr title="Central Processing Unit">CPU</abbr> 完成的，所以他们称这些问题为"CPU 密集型"。

---

CPU 密集型操作的常见示例是需要复杂的数学处理。

例如：

* **音频**或**图像**处理；
* **计算机视觉**: 一幅图像由数百万像素组成，每个像素有3种颜色值，处理通常需要同时对这些像素进行计算；

	s.freeIndexForScan = 1

	// Set up the range for allocation.
	s.userArenaChunkFree = makeAddrRange(base, base+s.elemsize)

	// Put the large span in the mcentral swept list so that it's
	// visible to the background sweeper.
	h.central[spc].mcentral.fullSwept(h.sweepgen).push(s)

	// Set up an allocation header. Avoid write barriers here because this type
	// is not a real type, and it exists in an invalid location.

이 시나리오에서, (당신을 포함한) 각각의 청소부들은 프로세서가 될 것이고, 각자의 역할을 수행합니다.

실행 시간의 대부분이 대기가 아닌 실제 작업에 소요되고, 컴퓨터에서 작업은 <abbr title="Central Processing Unit">CPU</abbr>에서 이루어지므로, 이러한 문제를 "CPU에 묶였"다고 합니다.

---

CPU에 묶인 연산에 관한 흔한 예시는 복잡한 수학 처리를 필요로 하는 경우입니다.

예를 들어:

* **오디오** 또는 **이미지** 처리.

	// After this point we can copy the stack.

	if !d.heap {
		return
	}

	mp := acquirem()
	pp := mp.p.ptr()
	if len(pp.deferpool) == cap(pp.deferpool) {
		// Transfer half of local cache to the central cache.
		var first, last *_defer
		for len(pp.deferpool) > cap(pp.deferpool)/2 {
			n := len(pp.deferpool)
			d := pp.deferpool[n-1]
			pp.deferpool[n-1] = nil
			pp.deferpool = pp.deferpool[:n-1]

このシナリオでは、清掃員 (あなたを含む) のそれぞれがプロセッサとなり、それぞれの役割を果たします。

また、実行時間のほとんどは (待機ではなく) 実際の作業に費やされ、コンピュータでの作業は<abbr title="Central Processing Unit">CPU</abbr>によって行われます。これらの問題は「CPUバウンド」と言います。

---

CPUバウンド操作の一般的な例は、複雑な数学処理が必要なものです。

例えば:

* **オーディオ** や **画像処理**。

	PT_CR5                  = 47  // Control register 5
	PT_CR6                  = 48  // Control register 6
	PT_CR7                  = 49  // Control register 7
	PT_CR8                  = 50  // Control register 8
	PT_CR9                  = 51  // Control register 9
	PT_CR10                 = 52  // Control register 10
	PT_CR11                 = 53  // Control register 11

loses its controlling terminal. The SIGINT signal is sent when the
user at the controlling terminal presses the interrupt character,
which by default is ^C (Control-C). The SIGQUIT signal is sent when
the user at the controlling terminal presses the quit character, which
by default is ^\ (Control-Backslash). In general you can cause a
program to simply exit by pressing ^C, and you can cause it to exit
with a stack dump by pressing ^\.

	_ "github.com/envoyproxy/go-control-plane/envoy/extensions/filters/http/compressor/v3"
	_ "github.com/envoyproxy/go-control-plane/envoy/extensions/filters/http/router/v3"
	_ "github.com/envoyproxy/go-control-plane/envoy/extensions/filters/network/http_connection_manager/v3"
	_ "github.com/envoyproxy/go-control-plane/envoy/extensions/upstreams/http/v3"

    exercising rights under, and complying with all of the terms of,
    this License. For legal entities, "You" includes any entity which
    controls, is controlled by, or is under common control with You. For
    purposes of this definition, "control" means (a) the power, direct
    or indirect, to cause the direction or management of such entity,
    whether by contract or otherwise, or (b) ownership of more than

    Location loc = op->getLoc();
    llvm::SmallVector<mlir::Type, 2> new_types(op->getResultTypes());
    // Update the control type from tf_type.control to tf_executor.control.
    new_types.back() = rewriter.getType<tf_executor::ControlType>();

    // Control operand is attached on tf_executor::IslandOp.
    llvm::SmallVector<Value> island_control_operands;
    llvm::SmallVector<Value> inner_op_operands;