const ranks = `
# Sysmon
NONE
< sysmon
< scavenge, forcegc;

# Defer
NONE < defer;

# GC
NONE <
  sweepWaiters,
  assistQueue,
  sweep;

# Test only
NONE < testR, testW;

NONE < timerSend;

# Scheduler, timers, netpoll
NONE < allocmW, execW, cpuprof, pollCache, pollDesc, wakeableSleep;
scavenge, sweep, testR, wakeableSleep, timerSend < hchan;
assistQueue,
  cpuprof,

	if test {
		// Set up the scavenge index via sysAlloc so the test can free it later.
		scavIndexSize := uintptr(len(scavengeIndexArray)) * unsafe.Sizeof(atomicScavChunkData{})
		s.chunks = ((*[(1 << heapAddrBits) / pallocChunkBytes]atomicScavChunkData)(sysAlloc(scavIndexSize, sysStat)))[:]
		mappedReady = scavIndexSize
	} else {
		// Set up the scavenge index.
		s.chunks = scavengeIndexArray[:]
	}

		sysMap(unsafe.Pointer(need.base.addr()), need.size(), p.sysStat)
		sysUsed(unsafe.Pointer(need.base.addr()), need.size(), need.size())
		p.summaryMappedReady += need.size()
	}

	// Update the scavenge index.
	p.summaryMappedReady += p.scav.index.sysGrow(base, limit, p.sysStat)
}

// sysGrow increases the index's backing store in response to a heap growth.
//
// Returns the amount of memory added to sysStat.

			cache: ^chunk.pages64(chunkPageIndex(addr)),
			scav:  chunk.scavenged.block64(chunkPageIndex(addr)),
		}
	}

	// Set the page bits as allocated and clear the scavenged bits, but
	// be careful to only set and clear the relevant bits.
	cpi := chunkPageIndex(c.base)
	chunk.allocPages64(cpi, c.cache)
	chunk.scavenged.clearBlock64(cpi, c.cache&c.scav /* free and scavenged */)

	// susceptible to collection.
	big = nil

	// FreeOSMemory runs a GC cycle before releasing memory,
	// so it's fine to skip a GC here.
	//
	// It's possible the background scavenger runs concurrently
	// with this function and does most of the work for it.
	// If that happens, it's OK. What we want is a test that fails
	// often if FreeOSMemory does not work correctly, and a test