Apple Microarchitecture Research by Dougall Johnson

M1/A14 P-core (Firestorm): Overview | Base Instructions | SIMD and FP Instructions
M1/A14 E-core (Icestorm):  Overview | Base Instructions | SIMD and FP Instructions

STR (S)

Test 1: uops

Code:

  str s0, [x6]
  mov x0, 0

(no loop instructions)

1000 unrolls and 1 iteration

Retires: 1.000

Issues: 1.000

Integer unit issues: 0.000

Load/store unit issues: 1.000

SIMD/FP unit issues: 0.000

retire uop (01)cycle (02)03l1d tlb fill (05)mmu table walk data (08)09l2 tlb miss data (0b)1e1f22233a3f46494f51schedule uop (52)schedule ldst uop (55)dispatch ldst uop (58)simd uops in schedulers (5a)60696d6emap stall dispatch (70)map rewind (75)map stall (76)dispatch uop (78)map ldst uop (7d)map ldst uop inputs (80)8283flush restart other nonspec (84)85inst all (8c)inst simd store (99)inst ldst (9b)l1d tlb access (a0)l1d tlb miss (a1)l1d cache miss st (a2)a4ld unit uop (a6)st unit uop (a7)l1d cache writeback (a8)a9acafbcl1d cache miss st nonspec (c0)l1d tlb miss nonspec (c1)c2cfd5map dispatch bubble (d6)ddfetch restart (de)e0? ldst retires (ed)f5f6f7f8fd
10055474111161910154416162251000100010002324405275615473623405100010002000558553111001100010001014143601101601191002163614173216335491000559548548553552
1004550411110210015431616025100010001000226920526558547373341110001000200056055811100110001000101514000101601201000163614173316335441000554553551548559
10045474111101900153816160251000100010002269205345525473603417100010002000558561111001100010001014143600101601181002143614073316335491000548560560553562
10045474111101400154400625100010001000233160526558552363341010001000200054755911100110001000101515000101600181002163614173316335441000548548560548553
1004552410100141015321601251000100010002293205345595603713419100010002000558547111001100010001014143600101401141002163614073316335441000559548554553559
10045484110012201015371616125100010001000232200526547547363341010001000200055054711100110001000101415360010140118100216014273316335551000559559559548553
1004547411010190015441616725100010001000232680526559552373341110001000200056054711100110001000101616360010160116100014014273316335561000558560548553561
1004561411010180015320166251000100010002322005275605473633410100010002000550559111001100010001015143600101402171002163614173216235441000559559553554549
10045584101001900154416168251000100010002269205225475523733405100010002000560558111001100010001016143600101400141000163614073316335441000553548548549553
100454741001018101543005251000100010002324405265595523733411100010002000560558111001100010001014143600101600161002163614073316335441000553553552561548

Test 2: throughput

Count: 8

Code:

  str s0, [x6]
  str s0, [x6]
  str s0, [x6]
  str s0, [x6]
  str s0, [x6]
  str s0, [x6]
  str s0, [x6]
  str s0, [x6]
  mov x7, x6
  mov x8, x6
  mov x9, x6
  mov x10, x6
  mov x11, x6
  mov x12, x6
  mov x13, x6

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code divided by count): 0.5005

retire uop (01)cycle (02)03mmu table walk instruction (07)mmu table walk data (08)l2 tlb miss data (0b)18191e1f2223243a3f46494f51schedule uop (52)schedule int uop (53)schedule ldst uop (55)dispatch int uop (56)dispatch ldst uop (58)int uops in schedulers (59)simd uops in schedulers (5a)60696d6emap stall dispatch (70)map rewind (75)map stall (76)dispatch uop (78)map int uop (7c)map ldst uop (7d)map int uop inputs (7f)map ldst uop inputs (80)8283flush restart other nonspec (84)85inst all (8c)inst branch (8d)inst branch taken (90)inst branch cond (94)inst int alu (97)inst simd store (99)inst ldst (9b)9fl1d tlb access (a0)l1d tlb miss (a1)l1d cache miss st (a2)a4ld unit uop (a6)st unit uop (a7)l1d cache writeback (a8)a9acafbcl1d cache miss st nonspec (c0)c2branch cond mispred nonspec (c5)branch mispred nonspec (cb)cdcfd5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)? ldst retires (ed)? int retires (ef)f5f6f7f8fd
802054004230000000031000400270160258010010080000100800005001839808040017400514004229963330000801002008000020016000040042400501180201100991001008000080000100800000340080002002800022340000511011611400370800001004004340041400414004340043
8020440042300000010600004003516160258010010080000100800005001839424040137400504004229955330000801002008000020016000040042406051180201100991001008000080000100800000340080002409800002340000511011611400460800001004005040041401924033740043
80204400403000001015910004002716160258010010080000100800005001839424040017400424004029953330000801002008000020016000040042400421180201100991001008000080000100800000340080002008800020340000511011611400390800001004005140043400434004340043
802044004229900000001000400270160258010010080000100800005001839424040017400404004229955330000801002008000020016000040042400421180201100991001008000080000100800000380080002002800002340000511011611400390800001004004340041400514004140041
802044004030000000000000400271600258010010080000100800005001839352040017400514005029953329998801002008000020016000040051400401180201100991001008000080000100800000340080000202800022340000511011611400390800001004005240041400434004340043
80204400423000000000000040036161602580100100800001008000050018393520400174004240040299553301248010020080000200160000400424005111802011009910010080000800001008000003400800026200800002340000511011611400370800001004004140043400414004140043
802044004230000000030000400270160145801001008000010080000500183942414001740050400422995533000080100200800002001600004004040042118020110099100100800008000010080000034008000210280002200000511011611400370800001004004340043400414004340041
802044004229900000031000400271600258010010080000100800005001839808040017400404004029963330000801002008000020016000040040400421180201100991001008000080000100800000340080002202800022340000511011611400480800001004004140043400434004340043
8020440051300000000300004002516160258010010080000100800005001839424040026400424004229955329998801002008000020016000040042400421180201100991001008000080000100800000340080002202800002340000511011611400390800001004005040041400434004140043
802044004230000000000000400271600258016010080000100800005001839352040017400504004229955330000801002008000020016000040042400421180201100991001008000080000100800000340080000208800020340000511011611400390800001004004140043400434004340041

1000 unrolls and 10 iterations

Result (median cycles for code divided by count): 0.5005

retire uop (01)cycle (02)03l1i tlb fill (04)mmu table walk data (08)09l2 tlb miss data (0b)18191e1f223f46494f51schedule uop (52)schedule int uop (53)schedule ldst uop (55)dispatch int uop (56)dispatch ldst uop (58)int uops in schedulers (59)simd uops in schedulers (5a)60696d6emap stall dispatch (70)map rewind (75)map stall (76)dispatch uop (78)map int uop (7c)map ldst uop (7d)map int uop inputs (7f)map ldst uop inputs (80)8283flush restart other nonspec (84)85inst all (8c)inst branch (8d)inst branch taken (90)inst branch cond (94)inst int alu (97)inst simd store (99)inst ldst (9b)9fl1d tlb access (a0)l1d tlb miss (a1)l1d cache miss st (a2)a4ld unit uop (a6)st unit uop (a7)l1d cache writeback (a8)a9acafbcl1d cache miss st nonspec (c0)c2cfl1i tlb miss demand (d4)d5map dispatch bubble (d6)ddfetch restart (de)e0? int output thing (e9)ea? ldst retires (ed)? int retires (ef)f5f6f7f8fd
8002540043300101000030400280160258001010800001080432501839448040017400404004229977330022800102080000201600004004340042118002110910108000080000108000004200800632038000224205020016161810400390080000104004340055400434004340047
8002440043300101000031400280161258001010800001080000501839448140017400424004029977330022800102080000201600004005440042118002110910108000080000108000004200800002505800022005021117161617400370080000104004340044400414004340043
8002440042300101000331400281616125800101080000108000050183944814001740042400422997833002280010208000020160000400404004211800211091010800008000010800000420080002108800022005021116161417403960080000104004340041400434005540043
8002440040300101000031400250161258001010800001080000601839448140018400424004229978330022800102080000201600004004240042118002110910108000080000108000004200800020028000224205021115161416400390080000104004340043400414004440044
800244004230010100003140027161686258001010801201080000501839448140017404594018129977330020800102280000201600004018940042318002110910108000080000108000000008006224016688000224205021116161616400390080000104004340043400444004140045
8002440042299101000031400281616025800101080000108000050183947214001840043400432997733002280010208000020160000400434004311800211091010800008000010800000420080002102800022420502111716816400390080000104059840043400434004340044
80024400423001010006314002816161258001010800001080000501839448140018400424004029978330022800102080000201600004004240042118002110910108000080000108000004200800020017800022005021116161416400390080000104004140041400444004440044
800244004230010100003140027000258001010800001080000501839352140017400404004229977330020800102080000201600004004040042118002110910108000080000108000000008000200880000200502119161714400370080000104004340041400414004340043
800244004030010100003140025161602580010108000010800005018393521400184004340042299783300228001020800002016000040040400421180021109101080000800001080000042008036300239180002242050211816178400370080000104004340458400434004340043
8002440040300101000931400270002580010108000010800005018393521401374004240042299781630022800102080000201600004004040042118002110910108000080000108000024200800027017800022420502111716917400390080000104004140044400414004340043