third_party/gperftools/doc/overview.dot

digraph Overview {
node [shape = box]

{rank=same
T1 [label="Thread Cache"]
Tsep [label="...", shape=plaintext]
Tn [label="Thread Cache"]
T1 -> Tsep -> Tn [style=invis]
}

C [label="Central\nHeap"]
T1 -> C [dir=both]
Tn -> C [dir=both]

}