digraph matrix {
	graph [newrank=true,
		nodesep=0.1,
		overlap=true,
		ranksep=0.1,
		splines=false
	];
	node [height=0.3,
		width=1.1
	];
	edge [arrowhead=none,
		arrowsize=0.5,
		style=invis,
		weight=1
	];
	{
		node [fixedsize=true,
			style=invis,
			width=0.3
			fixedsize=true
		];
		usr_	
		functions_
		D0
		E0
		F0
		G0
		H0
	}
	{ //
		node [fixedsize=true,
			style=invis,
			width=0.0
			height=0.0
		];
		row=subfunc;
		system_;
		networking_;
		storage_;
		memory_;
		processing_;
		HI_;
	} //
	{
		edge [style="filled,setlinewidth(3)",
			weight=10
		];
		{
			node [color="#e27dd6ff",
				height=0.5
				shape=box,
				style="filled,setlinewidth(3)",
			];
			system	[color="#e27dd6ff",
				fillcolor=white,
				fixedsize=true,
				height=0.5,
				row=func,
				tooltip=TODO,
				width=1];
			system_;
			SCI	[color="#e27dd6ff",
				fillcolor="#d9e7ee",
				fixedsize=true,
				height=0.5,
				label="System calls",
				row=usr,
				shape=ellipse,
				];
			system -> system_	[arrowhead="",
				color="#e27dd6ff",
				row=func,
				weight=10];
			sysfs	[color="#e27dd6ff",
				fillcolor="#b2d3e4",
				height=0.5,
				label="proc, sysfs,\nfile systems",
				];
			SCI -> sysfs	[color="#e27dd6ff",
				weight=10];
			DM	[color="#e27dd6ff",
				fillcolor="#91b5c9",
				fixedsize=true,
				fontsize=10,
				height=0.4,
				label="Device\nModel",
				shape=octagon,
				width=1];
			sysfs -> DM	[color="#e27dd6ff",
				weight=10];
			log_sys	[color="#e27dd6ff",
				fillcolor="#6a9ab1",
				fontsize=10,
				height=0.5,
				label="system run,\nmodules,\ngeneric\nHW access ",
				];
			DM -> log_sys	[color="#e27dd6ff",
				weight=10];
			bus_drv	[color="#e27dd6ff",
				fillcolor="#71809b",
				height=0.5,
				label="bus drivers",
				];
			log_sys -> bus_drv	[color="#e27dd6ff",
				weight=10];
			H2	[color="#e27dd6ff",
				fillcolor="#777777",
				fontcolor=white,
				fontsize=10,
				height=0.5,
				label="busess:\nPCI, USB ...",
				row=chip,
				];
			bus_drv -> H2	[color="#e27dd6ff",
				weight=10];
		}
		{
			node [color="#61c2c5",
				height=0.5
			];
			edge [color="#61c2c5"];
			networking	[color="#61c2c5",
				fillcolor=white,
				fixedsize=true,
				height=0.5,
				row=func,
				shape=box,
				style="filled,setlinewidth(3)",
				width=1];
			sock	[color="#61c2c5",
				fillcolor="#d9e7ee",
				fixedsize=true,
				height=0.5,
				label=Sockets,
				row=usr,
				shape=ellipse,
				style="filled,setlinewidth(3)"];
			networking -> networking_	[arrowhead="",
				color="#61c2c5",
				row=func,
				style="filled,setlinewidth(3)",
				weight=10];
			prot_fam	[color="#61c2c5",
				fillcolor="#b2d3e4",
				height=0.5,
				label="protocol\nfamilies",
				shape=box,
				style="filled,setlinewidth(3)"];
			sock -> prot_fam	[color="#61c2c5",
				style="filled,setlinewidth(3)",
				weight=10];
			log_prot	[color="#61c2c5",
				fillcolor="#6a9ab1",
				height=0.5,
				label="protocols:\nTCP, UDP, IP",
				shape=box,
				style="filled,setlinewidth(3)"];
			prot_fam -> log_prot	[color="#61c2c5",
				style="filled,setlinewidth(3)",
				weight=10];
			netif	[color="#61c2c5",
				fillcolor="#71809b",
				fontsize=10,
				height=0.5,
				label="network\ninterfaces\nand drivers",
				shape=box,
				style="filled,setlinewidth(3)"];
			log_prot -> netif	[color="#61c2c5",
				style="filled,setlinewidth(3)",
				weight=10];
			net_hw	[color="#61c2c5",
				fillcolor="#777777",
				fontcolor=white,
				fontsize=10,
				height=0.5,
				label="network:\nEthernet, WiFi ...",
				row=chip,
				shape=box,
				style="filled,setlinewidth(3)"];
			netif -> net_hw	[color="#61c2c5",
				style="filled,setlinewidth(3)",
				weight=10];
			NFS	[color="#8383cc",
				fillcolor="#91b5c9",
				fixedsize=true,
				height=0.4,
				label=NFS,
				shape=octagon,
				style="filled,setlinewidth(3)",
				width=0.6];
			NFS -> log_prot	[color="#61c2c5",
				style="filled,setlinewidth(3)",
				weight=0];
		}
		{
			node [color="#8383cc",
				height=0.5
			];
			edge [color="#8383cc"];
			NFS;
			storage	[color="#8383cc",
				fillcolor=white,
				fixedsize=true,
				height=0.5,
				row=func,
				shape=box,
				style="filled,setlinewidth(3)",
				width=1];
			FS	[color="#8383cc",
				fillcolor="#d9e7ee",
				fixedsize=true,
				height=0.5,
				label="files and\ndirectories",
				row=usr,
				shape=ellipse,
				style="filled,setlinewidth(3)"];
			storage -> storage_	[arrowhead="",
				color="#8383cc",
				row=func,
				style="filled,setlinewidth(3)",
				weight=10];
			VFS	[color="#8383cc",
				fillcolor="#b2d3e4",
				height=0.5,
				label="Virtual\nFile System",
				shape=box,
				style="filled,setlinewidth(3)"];
			FS -> VFS	[color="#8383cc",
				style="filled,setlinewidth(3)",
				weight=10];
			VFS -> NFS	[color="#8383cc",
				style="filled,setlinewidth(3)",
				weight=0];
			logFS	[color="#8383cc",
				fillcolor="#6a9ab1",
				fontsize=10,
				height=0.5,
				label="logical\nfilesystems:\next3, xfs ...",
				shape=box,
				style="filled,setlinewidth(3)"];
			VFS -> logFS	[color="#8383cc",
				style="filled,setlinewidth(3)",
				weight=10];
			PC	[color="#51bf5b",
				fillcolor="#91b5c9",
				fixedsize=true,
				fontsize=10,
				height=0.4,
				label="page\ncache",
				shape=octagon,
				style="filled,setlinewidth(3)",
				width=0.6];
			VFS -> PC	[color="#8383cc",
				style="filled,setlinewidth(3)",
				weight=0];
			mmap	[color="#51bf5b",
				fillcolor="#91b5c9",
				fixedsize=true,
				fontsize=10,
				height=0.4,
				label="memory\nmapping",
				shape=octagon,
				style="filled,setlinewidth(3)",
				width=1];
			VFS -> mmap	[color="#8383cc",
				style="filled,setlinewidth(3)",
				weight=0];
			block	[color="#8383cc",
				fillcolor="#71809b",
				fontsize=10,
				height=0.5,
				label="Block\ndevices\nand drivers",
				shape=box,
				style="filled,setlinewidth(3)"];
			logFS -> block	[color="#8383cc",
				style="filled,setlinewidth(3)",
				weight=10];
			PA	[color="#51bf5b",
				fillcolor="#71809b",
				height=0.5,
				label="Page\nAllocator",
				shape=box,
				style="filled,setlinewidth(3)"];
			PC -> PA	[color="#51bf5b",
				style="filled,setlinewidth(3)",
				weight=0];
			H4	[color="#8383cc",
				fillcolor="#777777",
				fontcolor=white,
				fontsize=10,
				height=0.5,
				label="storage devices:\nSCSI, NVMe ...",
				row=chip,
				shape=box,
				style="filled,setlinewidth(3)"];
			block -> H4	[color="#8383cc",
				style="filled,setlinewidth(3)",
				weight=10];
			SW	[color="#8383cc",
				fillcolor="#91b5c9",
				fixedsize=true,
				height=0.5,
				label=Swap,
				shape=octagon,
				style="filled,setlinewidth(3)",
				width=0.6];
			SW -> block	[color="#8383cc",
				style="filled,setlinewidth(3)",
				weight=0];
		}
		{
			node [color="#c46747",
				height=0.5
				style="filled,setlinewidth(3)",
			];
			edge [color="#c46747"];
			processing	[color="#c46747",
				fillcolor=white,
				fixedsize=true,
				height=0.5,
				row=func,
				shape=box,
				width=1];
			proc	[color="#c46747",
				fillcolor="#d9e7ee",
				fixedsize=true,
				height=0.5,
				label=Processes,
				row=usr,
				shape=ellipse,
				style="filled,setlinewidth(3)"];
			processing -> processing_	[arrowhead="",
				color="#c46747",
				row=func,
				style="filled,setlinewidth(3)",
				weight=10];
			Tasks	[color="#c46747",
				fillcolor="#b2d3e4",
				height=0.5,
				shape=box,
				style="filled,setlinewidth(3)"];
			proc -> Tasks	[color="#c46747",
				style="filled,setlinewidth(3)",
				weight=10];
			sync	[color="#c46747",
				fillcolor="#91b5c9",
				fixedsize=true,
				fontsize=10,
				height=0.5,
				label=synchronization,
				shape=octagon,
				style="filled,setlinewidth(3)"];
			Tasks -> sync	[color="#c46747",
				style="filled,setlinewidth(3)",
				weight=10];
			sched	[color="#c46747",
				fillcolor="#6a9ab1",
				height=0.5,
				label=Scheduler,
				shape=box,
				style="filled,setlinewidth(3)"];
			sync -> sched	[color="#c46747",
				style="filled,setlinewidth(3)",
				weight=10];
			IRQ	[color="#c46747",
				fillcolor="#71809b",
				fontsize=10,
				height=0.5,
				label="interrupts\ncore,\nCPU arch",
				shape=box,
				style="filled,setlinewidth(3)"];
			sched -> IRQ	[color="#c46747",
				style="filled,setlinewidth(3)",
				weight=10];
			CPU	[color="#c46747",
				fillcolor="#777777",
				fontcolor=white,
				fontsize=10,
				height=0.5,
				row=chip,
				shape=box,
				style="filled,setlinewidth(3)"];
			IRQ -> CPU	[color="#c46747",
				style="filled,setlinewidth(3)",
				weight=10];
		}
		{
			node [color="#cfbf57ff",
				height=0.5
				style="filled,setlinewidth(3)",
			];
			edge [color="#cfbf57ff"];
			HI	[color="#cfbf57ff",
				fillcolor=white,
				fixedsize=true,
				height=0.5,
				label="human\ninterface",
				row=func,
				shape=box,
				width=1];
			char	[color="#cfbf57ff",
				fillcolor="#d9e7ee",
				fixedsize=true,
				height=0.5,
				label="char\ndevices",
				row=usr,
				shape=ellipse,
				style="filled,setlinewidth(3)"];
			HI -> HI_	[arrowhead="",
				color="#cfbf57ff",
				row=func,
				style="filled,setlinewidth(3)",
				weight=10];
			input	[color="#cfbf57ff",
				fillcolor="#b2d3e4",
				height=0.5,
				label="input\nsubsystem",
				shape=box,
				style="filled,setlinewidth(3)"];
			char -> input	[color="#cfbf57ff",
				style="filled,setlinewidth(3)",
				weight=10];
			F7	[color="#cfbf57ff",
				fillcolor="#6a9ab1",
				height=0.5,
				label="HI class\ndrivers",
				shape=box,
				style="filled,setlinewidth(3)"];
			input -> F7	[color="#cfbf57ff",
				style="filled,setlinewidth(3)",
				weight=10];
			G7	[color="#cfbf57ff",
				fillcolor="#71809b",
				fontsize=10,
				height=0.5,
				label="HI\nperipherals\ndrivers",
				shape=box,
				style="filled,setlinewidth(3)"];
			F7 -> G7	[color="#cfbf57ff",
				style="filled,setlinewidth(3)",
				weight=10];
			H7	[color="#cfbf57ff",
				fillcolor="#777777",
				fontcolor=white,
				fontsize=10,
				height=0.5,
				label="display, keyboard,\nmouse, audio",
				row=chip,
				shape=box,
				style="filled,setlinewidth(3)"];
			G7 -> H7	[color="#cfbf57ff",
				style="filled,setlinewidth(3)",
				weight=10];
		}
		subgraph xcluster_layers {
			usr_;
			D0;
			E0;
			F0;
			G0;
			H0;
			functions	[color=gray,
				fillcolor=gray,
				fixedsize=true,
				height=0.5,
				row=func,
				shape=box,
				style=dashed,
				width=0.8];
			layers	[fillcolor=lightgray,
				height=0.1,
				shape=box,
				style="filled,setlinewidth(0)",
				width=0.5];
			functions -> layers	[style=invis,
				weight=10];
			usr	[fillcolor="#d9e7eeff",
				fixedsize=true,
				height=0.5,
				label="user space\ninterfaces",
				row=usr,
				shape=ellipse,
				style="filled,setlinewidth(0)"];
			layers -> usr	[arrowhead="",
				color=gray,
				style="filled,setlinewidth(1)",
				weight=10];
			usr -> usr_	[arrowhead="",
				color="#d9e7eeff",
				minlen=2,
				style="filled,setlinewidth(3)",
				weight=10];
			virt	[fillcolor="#b2d3e4",
				height=0.5,
				label="virtual\nsubsystems",
				shape=box,
				style="filled,setlinewidth(0)"];
			usr -> virt	[color="#d9e7eeff",
				style="filled,setlinewidth(3)",
				weight=10];
			virt -> D0	[arrowhead="",
				color="#b2d3e4",
				minlen=2,
				style="filled,setlinewidth(3)",
				weight=10];
			bridges	[fillcolor="#91b5c9",
				height=0.5,
				shape=octagon,
				style="filled,setlinewidth(0)"];
			virt -> bridges	[color="#b2d3e4",
				style="filled,setlinewidth(3)",
				weight=10];
			bridges -> E0	[arrowhead="",
				color="#91b5c9",
				minlen=2,
				style="filled,setlinewidth(3)",
				weight=""];
			logical	[fillcolor="#6a9ab1",
				height=0.5,
				shape=box,
				style="filled,setlinewidth(0)"];
			bridges -> logical	[color="#91b5c9",
				style="filled,setlinewidth(3)",
				weight=10];
			logical -> F0	[arrowhead="",
				color="#6a9ab1",
				minlen=2,
				row=logical,
				style="filled,setlinewidth(3)",
				weight=""];
			HWI	[fillcolor="#71809b",
				height=0.5,
				label="hardware\ninterfaces",
				shape=box,
				style="filled,setlinewidth(0)"];
			logical -> HWI	[color="#6a9ab1",
				row=logical,
				style="filled,setlinewidth(3)",
				weight=10];
			HWI -> G0	[arrowhead="",
				color="#71809b",
				minlen=2,
				row=HWI,
				style="filled,setlinewidth(3)",
				weight=""];
			HW	[fillcolor="#777777",
				fontcolor=white,
				height=0.5,
				label="electronics,\nhardware",
				row=chip,
				shape=box,
				style="filled,setlinewidth(0)"];
			HWI -> HW	[color="#71809b",
				row=HWI,
				style="filled,setlinewidth(3)",
				weight=10];
			HW -> H0	[arrowhead="",
				color="#777777",
				minlen=2,
				row=chip,
				style="filled,setlinewidth(3)",
				weight=""];
		}
		subgraph mem {
			node [color="#51bf5b",
				height=0.5
			];
			edge [color="#51bf5b"];
			PC;
			mmap;
			SW;
			mmap -> SW	[color="#51bf5b",
				style="filled,setlinewidth(3)",
				weight=0];
			log_mem	[color="#51bf5b",
				fillcolor="#6a9ab1",
				height=0.5,
				label="logical\nmemory",
				shape=box,
				style="filled,setlinewidth(3)"];
			mmap -> log_mem	[color="#51bf5b",
				style="filled,setlinewidth(3)",
				weight=10];
			PA;
			H5	[color="#51bf5b",
				fillcolor="#777777",
				fontcolor=white,
				fontsize=10,
				height=0.5,
				label="MMU, RAM",
				row=chip,
				shape=box,
				style="filled,setlinewidth(3)"];
			PA -> H5	[color="#51bf5b",
				style="filled,setlinewidth(3)",
				weight=10];
			log_mem -> PA	[color="#51bf5b",
				style="filled,setlinewidth(3)",
				weight=10];
			memory	[color="#51bf5b",
				fillcolor=white,
				fixedsize=true,
				height=0.5,
				row=func,
				shape=box,
				style="filled,setlinewidth(3)",
				width=1];
			MA	[color="#51bf5b",
				fillcolor="#d9e7ee",
				fixedsize=true,
				height=0.5,
				label="memory\naccess",
				row=usr,
				shape=ellipse,
				style="filled,setlinewidth(3)"];
			memory -> memory_	[arrowhead="",
				color="#51bf5b",
				row=func,
				style="filled,setlinewidth(3)",
				weight=10];
			VM	[color="#51bf5b",
				fillcolor="#b2d3e4",
				height=0.5,
				label="Virtual\nmemory",
				shape=box,
				style="filled,setlinewidth(3)"];
			MA -> VM	[color="#51bf5b",
				style="filled,setlinewidth(3)",
				weight=10];
			VM -> mmap	[color="#51bf5b",
				style="filled,setlinewidth(3)",
				weight=10];
		}
	}
	{
		graph [rank=same];
		functions_;
		system;
		functions_ -> system;
		networking;
		system -> networking;
		storage;
		networking -> storage;
		memory;
		storage -> memory;
		processing;
		HI;
		processing -> HI;
		functions;
		functions -> functions_	[arrowhead="",
			color=gray,
			style="",
			weight=""];
		memory -> processing;
	}
	{
		graph [rank=same];
		usr_;
		SCI;
		sock;
		FS;
		proc;
		char;
		usr;
		MA;
	}
	{
		edge [weight=10 style=invis];
		system_ -> SCI
		networking_ -> sock;
		storage_ -> FS;
		memory_ -> MA;
		processing_ -> proc;
		HI_ -> char;
	}
	{
		graph [rank=same];
		D0;
		sysfs;
		prot_fam;
		VFS;
		Tasks;
		input;
		virt;
		VM;
	}
	{
		graph [rank=same];
		node [fontcolor=white];
		E0;
		DM;
		NFS;
		mmap;
		sync;
		bridges;
	}
	{
		graph [rank=same];
		F0;
		log_sys;
		log_prot;
		logFS;
		sched;
		F7;
		logical;
		log_mem;
	}
	{
		graph [rank=same];
		G0;
		bus_drv;
		netif;
		block;
		PA;
		IRQ;
		G7;
		HWI;
	}
	{
		graph [rank=same];
		H0;
		H2;
		net_hw;
		H4;
		CPU;
		H7;
		HW;
		H5;
	}
	bottom	[label="© 2007-2019 Constantine Shulyupin http://www.MakeLinux.net/kernel/diagram",
		shape=plaintext];
	H4 -> bottom	[weight=""];
	LKD	[fontsize=20,
		label="Linux kernel diagram",
		shape=plain];
	LKD -> storage;
}