func MMUHandlerFunc(ranges []Range, f MutatorUtilFunc) http.HandlerFunc {
	mmu := &mmu{
		cache:  make(map[trace.UtilFlags]*mmuCacheEntry),
		f:      f,
		ranges: ranges,
	}
	return func(w http.ResponseWriter, r *http.Request) {
		switch r.FormValue("mode") {
		case "plot":
			mmu.HandlePlot(w, r)
			return
		case "details":
			mmu.HandleDetails(w, r)
			return
		}

}

// MMU returns the minimum mutator utilization for the given time
// window. This is the minimum utilization for all windows of this
// duration across the execution. The returned value is in the range
// [0, 1].
func (c *MMUCurve) MMU(window time.Duration) (mmu float64) {
	acc := accumulator{mmu: 1.0, bound: 1.0}
	c.mmu(window, &acc)
	return acc.mmu
}

	// Goroutines handlers.
	mux.HandleFunc("/goroutines", GoroutinesHandlerFunc(parsed.summary.Goroutines))
	mux.HandleFunc("/goroutine", GoroutineHandler(parsed.summary.Goroutines))

	// MMU handler.
	mux.HandleFunc("/mmu", traceviewer.MMUHandlerFunc(ranges, mutatorUtil))

	// Basic pprof endpoints.
	mux.HandleFunc("/io", traceviewer.SVGProfileHandlerFunc(pprofByGoroutine(computePprofIO(), parsed)))

</p>
<ul>
<li><a href="/usertasks">User-defined tasks</a></li>
<li><a href="/userregions">User-defined regions</a></li>
</ul>

<h2>Garbage collection metrics</h2>
<ul>
<li><a href="/mmu">Minimum mutator utilization</a></li>
</ul>
<p>
  This chart indicates the maximum GC pause time (the largest x value
  for which y is zero), and more generally, the fraction of time that

</p>

<h3 id="x86">32-bit Intel 386</h3>

<p>
The runtime pointer to the <code>g</code> structure is maintained
through the value of an otherwise unused (as far as Go is concerned) register in the MMU.
In the runtime package, assembly code can include <code>go_tls.h</code>, which defines
an OS- and architecture-dependent macro <code>get_tls</code> for accessing this register.