Process Virtual Memory Resident set mheap P1(Logical Processor/Hardware Thread) Goroutine 1 stack arena arena ... mcentral mcentral mcentral .. mcache mspan 8b mspan 16b mspan 32b mspan .. mspan .. mspan .. mspan .. mspan .. mspan 32768b mspan 8b (non empty) mspan 8b (empty) mspan 16b mspan 16b mspan mspan P2 G6 stack mcache .. .. .. .. Pn Gn stack mcache mspan 8b mspan 8b mspan 8b mspan 8b mspan 8b mspan 8b 

mspan mspan 8b 8b 8b 8b …. 8b 8b 8b 1024 objects mspan 16b 16b 16b 16b …. 16b 16b 16b 512 objects mspan 32b 32b 32b 32b …. 32b 32b 32b 256 objects mspan 48b 48b 48b 48b …. 48b 48b 48b 170 objects mspan 32768 bytes 1 object mspan .. .. .. .. …. .. .. .. ... 

Go Scheduler P M G Processor Core G G P = Logical Processor per Hardware Thread M = Machine per OS Thread G = Goroutine (Coroutine) LRQ = Local Run Queue LRQ 

Tiny allocation 

Tiny allocation P1 M G2 Processor Core P = Logical Processor per Hardware Thread M = Machine per OS Thread G = Goroutine (Coroutine) mcache mheap arena mcentral mspan 8b (non empty) mspan 8b (empty) mspan 8b mspan 8b mspan 8b mspan 8b mspan 8b mspan 8b mcentral mspan 16b (non empty) mspan 16b (empty) mspan 16b mspan 16b mspan 16b mspan 16b mspan 16b mspan 16b mspan 8b mspan 16b mspan 16b Tiny allocation slot 12b 

Tiny allocation P1 M G2 Processor Core P = Logical Processor per Hardware Thread M = Machine per OS Thread G = Goroutine (Coroutine) mcache mheap arena mcentral mspan 8b (non empty) mspan 8b (empty) mspan 8b mspan 8b mspan 8b mspan 8b mspan 8b mspan 8b mcentral mspan 16b (non empty) mspan 16b (empty) mspan 16b mspan 16b mspan 16b mspan 16b mspan 16b mspan 16b mspan 8b mspan 16b mspan 16b Tiny allocation slot 12b 4b 

Tiny allocation P1 M G2 Processor Core P = Logical Processor per Hardware Thread M = Machine per OS Thread G = Goroutine (Coroutine) mcache mheap arena mcentral mspan 8b (non empty) mspan 8b (empty) mspan 8b mspan 8b mspan 8b mspan 8b mspan 8b mspan 8b mcentral mspan 16b (non empty) mspan 16b (empty) mspan 16b mspan 16b mspan 16b mspan 16b mspan 16b mspan 16b mspan 8b mspan 16b mspan 16b Tiny allocation slot 12b 4b 

Tiny allocation P1 M G2 Processor Core P = Logical Processor per Hardware Thread M = Machine per OS Thread G = Goroutine (Coroutine) mcache mheap arena mcentral mspan 8b (non empty) mspan 8b (empty) mspan 8b mspan 8b mspan 8b mspan 8b mspan 8b mspan 8b mcentral mspan 16b (non empty) mspan 16b (empty) mspan 16b mspan 16b mspan 16b mspan 16b mspan 16b mspan 16b mspan 8b mspan 16b mspan 16b Tiny allocation slot 12b 4b 10b 

Tiny allocation P1 M G2 Processor Core P = Logical Processor per Hardware Thread M = Machine per OS Thread G = Goroutine (Coroutine) mcache mheap arena mcentral mspan 8b (non empty) mspan 8b (empty) mspan 8b mspan 8b mspan 8b mspan 8b mspan 8b mspan 8b mcentral mspan 16b (non empty) mspan 16b (empty) mspan 16b mspan 16b mspan 16b mspan 16b mspan 16b mspan 16b mspan 8b mspan 16b mspan 16b Tiny allocation slot 12b 4b 10b 

Tiny allocation P1 M G2 Processor Core P = Logical Processor per Hardware Thread M = Machine per OS Thread G = Goroutine (Coroutine) mcache mheap arena mcentral mspan 8b (non empty) mspan 8b (empty) mspan 8b mspan 8b mspan 8b mspan 8b mspan 8b mspan 8b mcentral mspan 16b (non empty) mspan 16b (empty) mspan 16b mspan 16b mspan 16b mspan 16b mspan 16b mspan 16b mspan 8b mspan 16b mspan 16b Tiny allocation slot 12b 4b 10b 

Tiny allocation P1 M G2 Processor Core P = Logical Processor per Hardware Thread M = Machine per OS Thread G = Goroutine (Coroutine) mcache mheap arena mcentral mspan 8b (non empty) mspan 8b (empty) mspan 8b mspan 8b mspan 8b mspan 8b mspan 8b mspan 8b mcentral mspan 16b (non empty) mspan 16b (empty) mspan 16b mspan 16b mspan 16b mspan 16b mspan 16b mspan 16b mspan 8b mspan 16b mspan 16b Tiny allocation slot 12b 4b 10b 12b 

Tiny allocation P1 M G2 Processor Core P = Logical Processor per Hardware Thread M = Machine per OS Thread G = Goroutine (Coroutine) mcache mheap arena mcentral mspan 8b (non empty) mspan 8b (empty) mspan 8b mspan 8b mspan 8b mspan 8b mspan 8b mspan 8b mcentral mspan 16b (non empty) mspan 16b (empty) mspan 16b mspan 16b mspan 16b mspan 16b mspan 16b mspan 16b mspan 8b mspan 16b mspan 16b Tiny allocation slot 12b 4b 10b 12b No free mspan 16b 

Tiny allocation P1 M G2 Processor Core P = Logical Processor per Hardware Thread M = Machine per OS Thread G = Goroutine (Coroutine) mcache mheap arena mcentral mspan 8b (non empty) mspan 8b (empty) mspan 8b mspan 8b mspan 8b mspan 8b mspan 8b mspan 8b mcentral mspan 16b (non empty) mspan 16b (empty) mspan 16b mspan 16b mspan 16b mspan 16b mspan 16b mspan 16b mspan 8b mspan 16b mspan 16b Tiny allocation slot 12b 4b 10b 12b 

Tiny allocation P1 M G2 Processor Core P = Logical Processor per Hardware Thread M = Machine per OS Thread G = Goroutine (Coroutine) mcache mheap arena mcentral mspan 8b (non empty) mspan 8b (empty) mspan 8b mspan 8b mspan 8b mspan 8b mspan 8b mspan 8b mcentral mspan 16b (non empty) mspan 16b (empty) mspan 16b mspan 16b mspan 16b mspan 16b mspan 16b mspan 16b mspan 8b mspan 16b mspan 16b Tiny allocation slot 12b 4b 10b 12b 

Tiny allocation P1 M G2 Processor Core P = Logical Processor per Hardware Thread M = Machine per OS Thread G = Goroutine (Coroutine) mcache mheap arena mcentral mspan 8b (non empty) mspan 8b (empty) mspan 8b mspan 8b mspan 8b mspan 8b mspan 8b mspan 8b mcentral mspan 16b (non empty) mspan 16b (empty) mspan 16b mspan 16b mspan 16b mspan 16b mspan 16b mspan 16b mspan 8b mspan 16b mspan 16b Tiny allocation slot 12b 4b 10b 12b 

Small allocation 

Small allocation P1 M G2 Processor Core P = Logical Processor per Hardware Thread M = Machine per OS Thread G = Goroutine (Coroutine) mcache mheap arena mcentral mspan 8b (non empty) mspan 8b (empty) mspan 8b mspan 8b mspan 8b mspan 8b mspan 8b mspan 8b mcentral mspan 32b (non empty) mspan 32b (empty) mspan 32b mspan 32b mspan 32b mspan 32b mspan 32b mspan 32b mspan 8b mspan 16b mspan 32b Tiny allocation slot 12b 

Small allocation P1 M G2 Processor Core P = Logical Processor per Hardware Thread M = Machine per OS Thread G = Goroutine (Coroutine) mcache mheap arena mcentral mspan 8b (non empty) mspan 8b (empty) mspan 8b mspan 8b mspan 8b mspan 8b mspan 8b mspan 8b mcentral mspan 8b mspan 16b mspan 32b Tiny allocation slot 12b 20b mspan 32b (non empty) mspan 32b (empty) mspan 32b mspan 32b mspan 32b mspan 32b mspan 32b mspan 32b 

Small allocation P1 M G2 Processor Core P = Logical Processor per Hardware Thread M = Machine per OS Thread G = Goroutine (Coroutine) mcache mheap arena mcentral mspan 8b (non empty) mspan 8b (empty) mspan 8b mspan 8b mspan 8b mspan 8b mspan 8b mspan 8b mcentral mspan 8b mspan 16b mspan 32b Tiny allocation slot 12b 20b mspan 32b (non empty) mspan 32b (empty) mspan 32b mspan 32b mspan 32b mspan 32b mspan 32b mspan 32b 

Small allocation P1 M G2 Processor Core P = Logical Processor per Hardware Thread M = Machine per OS Thread G = Goroutine (Coroutine) mcache mheap arena mcentral mspan 8b (non empty) mspan 8b (empty) mspan 8b mspan 8b mspan 8b mspan 8b mspan 8b mspan 8b mcentral mspan 8b mspan 16b mspan 32b Tiny allocation slot 12b 20b 32b No free mspan 32b mspan 32b (non empty) mspan 32b (empty) mspan 32b mspan 32b mspan 32b mspan 32b mspan 32b mspan 32b 

Small allocation P1 M G2 Processor Core P = Logical Processor per Hardware Thread M = Machine per OS Thread G = Goroutine (Coroutine) mcache mheap arena mcentral mspan 8b (non empty) mspan 8b (empty) mspan 8b mspan 8b mspan 8b mspan 8b mspan 8b mspan 8b mcentral mspan 8b mspan 16b mspan 32b Tiny allocation slot 12b 20b 32b No free mspan 32b mspan 32b (non empty) mspan 32b (empty) mspan 32b mspan 32b mspan 32b mspan 32b mspan 32b mspan 32b 

Small allocation P1 M G2 Processor Core P = Logical Processor per Hardware Thread M = Machine per OS Thread G = Goroutine (Coroutine) mcache mheap arena mcentral mspan 8b (non empty) mspan 8b (empty) mspan 8b mspan 8b mspan 8b mspan 8b mspan 8b mspan 8b mcentral mspan 8b mspan 16b mspan 32b Tiny allocation slot 12b 20b 32b mspan 32b (non empty) mspan 32b (empty) mspan 32b mspan 32b mspan 32b mspan 32b mspan 32b mspan 32b 

Small allocation P1 M G2 Processor Core P = Logical Processor per Hardware Thread M = Machine per OS Thread G = Goroutine (Coroutine) mcache mheap arena mcentral mspan 8b (non empty) mspan 8b (empty) mspan 8b mspan 8b mspan 8b mspan 8b mspan 8b mspan 8b mcentral mspan 8b mspan 16b mspan 32b Tiny allocation slot 12b 20b mspan 32b (non empty) mspan 32b (empty) mspan 32b mspan 32b mspan 32b mspan 32b mspan 32b mspan 32b 32b 

Large allocation 

Large allocation P1 M G2 Processor Core P = Logical Processor per Hardware Thread M = Machine per OS Thread G = Goroutine (Coroutine) mcache mheap arena mcentral mspan 8b (non empty) mspan 8b (empty) mspan 8b mspan 8b mspan 8b mspan 8b mspan 8b mspan 8b mcentral mspan 8b mspan 16b mspan 32b Tiny allocation slot 12b 20b mspan 32b 32b 

Large allocation P1 M G2 Processor Core P = Logical Processor per Hardware Thread M = Machine per OS Thread G = Goroutine (Coroutine) mcache mheap arena mcentral mspan 8b (non empty) mspan 8b (empty) mspan 8b mspan 8b mspan 8b mspan 8b mspan 8b mspan 8b mcentral mspan 8b mspan 16b mspan 32b Tiny allocation slot 12b 20b mspan 32b 32b 40Kb 

Large allocation P1 M G2 Processor Core P = Logical Processor per Hardware Thread M = Machine per OS Thread G = Goroutine (Coroutine) mcache mheap arena mcentral mspan 8b (non empty) mspan 8b (empty) mspan 8b mspan 8b mspan 8b mspan 8b mspan 8b mspan 8b mcentral mspan 8b mspan 16b mspan 32b Tiny allocation slot 12b 20b mspan 32b 32b mspan 40Kb