Firestorm: FSQRT (scalar, S) measurements

Code:

  fsqrt s0, s0

Initialization

  movi v0.16b, 1
  movi v1.16b, 2

(no loop instructions)

1000 unrolls and 1 iteration

Retires: 1.000

Issues: 1.000

Integer unit issues: 0.000

Load/store unit issues: 0.000

SIMD/FP unit issues: 1.000

All non-zero counters (first 10 of 64 runs)

retire uop (01)	cycle (02)	03	mmu table walk data (08)	l2 tlb miss data (0b)	1e	1f	3f	4e	51	schedule uop (52)	schedule simd uop (54)	dispatch simd uop (57)	ldst uops in schedulers (5b)	69	6d	6e	map stall dispatch (70)	map rewind (75)	map stall (76)	dispatch uop (78)	map simd uop (7e)	map simd uop inputs (81)	82	83	flush restart other nonspec (84)	85	inst all (8c)	inst simd alu (9a)	l1d cache writeback (a8)	ac	cf	d5	map dispatch bubble (d6)	dd	fetch restart (de)	e0	? simd retires (ee)	f5	f6	f7	f8	fd
1004	10037	75	0	0	0	0	61	8648	25	1000	1000	1000	351941	10018	10037	10037	9395	3	9895	1000	1000	1000	10037	10037	1	1	1001	1000	0	0	73	2	16	1	1	9578	1000	10038	10038	10038	10038	10038
1004	10037	76	0	0	27	0	61	8648	25	1000	1000	1000	351941	10018	10037	10037	9395	3	9895	1000	1000	1000	10037	10037	1	1	1001	1000	0	0	73	1	16	1	1	9578	1000	10038	10038	10038	10038	10038
1004	10037	75	0	0	6	0	61	8648	25	1000	1000	1000	351941	10018	10037	10037	9395	3	9895	1000	1000	1000	10037	10037	1	1	1001	1000	0	0	73	1	16	1	1	9578	1000	10038	10038	10038	10038	10038
1004	10037	75	0	0	6	0	61	8648	25	1000	1000	1000	351941	10018	10037	10037	9395	3	9895	1000	1000	1000	10037	10037	1	1	1001	1000	0	0	73	1	16	1	1	9578	1000	10038	10038	10038	10038	10038
1004	10037	75	0	0	6	0	61	8648	25	1000	1000	1000	351941	10018	10037	10037	9395	3	9895	1000	1000	1000	10037	10037	1	1	1001	1000	0	0	73	1	16	1	1	9578	1000	10038	10038	10038	10038	10038
1004	10037	75	0	0	0	0	61	8648	25	1000	1000	1000	351941	10018	10037	10037	9395	3	9895	1000	1000	1000	10037	10037	1	1	1001	1000	0	0	73	1	16	1	1	9578	1000	10038	10038	10038	10038	10038
1004	10037	76	0	0	0	0	61	8648	25	1000	1000	1000	351941	10018	10037	10037	9395	3	9895	1000	1000	1000	10037	10037	1	1	1001	1000	0	0	73	1	16	1	1	9578	1000	10038	10038	10038	10038	10038
1004	10037	75	0	0	0	0	536	8648	25	1000	1000	1000	351941	10018	10037	10037	9395	3	9895	1000	1000	1000	10037	10037	1	1	1001	1000	0	0	73	1	16	1	1	9578	1000	10038	10038	10038	10038	10038
1004	10037	75	0	0	0	0	61	8648	25	1000	1000	1000	351941	10018	10037	10037	9395	3	9895	1000	1000	1000	10037	10037	1	1	1001	1000	0	0	73	1	16	1	1	9578	1000	10038	10038	10038	10038	10038
1004	10037	75	0	0	0	0	61	8648	25	1000	1000	1000	351941	10018	10037	10037	9395	3	9895	1000	1000	1000	10037	10037	1	1	1001	1000	0	0	73	1	16	1	1	9578	1000	10038	10038	10038	10038	10038

Test 2: Latency 1->2

Code:

  fsqrt s0, s0

Initialization

  movi v0.16b, 1
  movi v1.16b, 2

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code): 10.0037

All non-zero counters (first 10 of 64 runs)

retire uop (01)	cycle (02)	03	mmu table walk instruction (07)	l2 tlb miss instruction (0a)	1e	1f	3f	4e	51	schedule uop (52)	schedule int uop (53)	schedule simd uop (54)	dispatch int uop (56)	dispatch simd uop (57)	int uops in schedulers (59)	ldst uops in schedulers (5b)	60	69	6d	6e	map stall dispatch (70)	map rewind (75)	map stall (76)	dispatch uop (78)	map int uop (7c)	map simd uop (7e)	map int uop inputs (7f)	map simd uop inputs (81)	82	83	flush restart other nonspec (84)	85	inst all (8c)	inst branch (8d)	inst branch taken (90)	inst branch cond (94)	inst int alu (97)	inst simd alu (9a)	9f	ld unit uop (a6)	l1d cache writeback (a8)	ac	c2	branch cond mispred nonspec (c5)	cd	cf	d5	map dispatch bubble (d6)	dd	fetch restart (de)	e0	? int output thing (e9)	? simd retires (ee)	? int retires (ef)	f5	f6	f7	f8	fd
10204	100037	749	0	0	0	0	61	89648	25	10100	100	10000	100	10000	500	3582941	0	100018	100037	100037	98245	3	98745	10100	200	10000	200	10000	100037	100037	1	1	10201	100	99	100	100	10000	100	0	3	0	0	0	0	710	1	16	1	1	99578	0	10000	100	100038	100038	100038	100038	100038
10204	100037	749	0	0	0	528	61	89648	25	10100	100	10000	100	10000	500	3582941	0	100018	100037	100037	98245	3	98745	10100	200	10000	200	10000	100037	100037	1	1	10201	100	99	100	100	10000	100	0	0	0	0	1	0	710	1	16	1	1	99578	0	10000	100	100038	100038	100038	100038	100038
10204	100037	749	0	0	0	0	61	89648	25	10100	100	10000	100	10000	500	3582941	0	100018	100037	100037	98245	3	98745	10100	200	10000	200	10000	100037	100037	1	1	10201	100	99	100	100	10000	100	0	0	0	0	0	0	710	1	16	1	1	99578	0	10000	100	100038	100038	100038	100038	100038
10204	100037	750	0	0	0	0	61	89648	25	10100	100	10000	100	10000	500	3582941	0	100018	100037	100037	98245	3	98745	10100	200	10000	200	10000	100037	100037	1	1	10201	100	99	100	100	10000	100	0	0	0	0	0	0	710	1	16	1	1	99578	0	10000	100	100038	100038	100038	100038	100038
10204	100037	750	0	0	0	0	193	89648	25	10100	100	10000	100	10000	500	3582941	0	100018	100037	100037	98245	3	98745	10100	200	10000	200	10000	100037	100037	1	1	10201	100	99	100	100	10000	100	0	0	0	0	0	0	710	1	16	1	1	99578	0	10000	100	100038	100038	100038	100038	100038
10204	100037	749	0	0	0	0	441	89648	25	10100	100	10000	100	10000	500	3582941	0	100018	100037	100037	98245	3	98745	10100	200	10000	200	10000	100037	100037	1	1	10201	100	99	100	100	10000	100	0	0	0	0	0	0	710	1	16	1	1	99578	0	10000	100	100038	100038	100038	100038	100038
10204	100037	749	0	0	0	108	61	89648	25	10100	100	10000	100	10000	500	3582941	1	100018	100070	100037	98245	3	98745	10100	200	10000	200	10000	100037	100037	1	1	10201	100	99	100	100	10000	100	0	0	0	0	0	0	710	2	56	1	1	99686	24	10000	100	100038	100038	100038	100038	100038
10204	100037	749	0	0	60	0	61	89648	25	10100	100	10000	100	10000	500	3582941	0	100018	100037	100037	98245	3	98745	10100	200	10000	200	10000	100037	100037	1	1	10201	100	99	100	100	10000	100	0	0	0	0	0	0	710	1	16	1	1	99578	0	10000	100	100038	100038	100038	100038	100038
10204	100037	750	0	0	0	0	726	89648	25	10100	100	10000	100	10000	500	3582941	1	100018	100037	100037	98245	3	98745	10100	200	10000	200	10000	100037	100037	1	1	10201	100	99	100	100	10000	100	0	0	0	0	0	0	710	1	16	1	1	99578	0	10000	100	100038	100038	100038	100038	100038
10204	100037	749	0	0	0	0	61	89648	25	10100	100	10000	100	10000	500	3582941	1	100018	100037	100037	98245	3	98745	10100	200	10000	200	10000	100037	100037	1	1	10201	100	99	100	100	10000	100	0	2	0	0	0	0	710	1	16	1	1	99578	0	10000	100	100038	100038	100038	100038	100038

1000 unrolls and 10 iterations

Result (median cycles for code): 10.0037

All non-zero counters (first 10 of 64 runs)

retire uop (01)	cycle (02)	03	l1i tlb fill (04)	mmu table walk instruction (07)	l2 tlb miss data (0b)	19	1e	1f	3f	4e	51	schedule uop (52)	schedule int uop (53)	schedule simd uop (54)	dispatch int uop (56)	dispatch simd uop (57)	int uops in schedulers (59)	ldst uops in schedulers (5b)	60	69	6b	6d	6e	map stall dispatch (70)	simd prf full (72)	map rewind (75)	map stall (76)	dispatch uop (78)	map int uop (7c)	map simd uop (7e)	map int uop inputs (7f)	map simd uop inputs (81)	82	83	flush restart other nonspec (84)	85	inst all (8c)	inst branch (8d)	inst branch taken (90)	inst branch cond (94)	inst int alu (97)	inst simd alu (9a)	9f	l1d tlb access (a0)	l1d tlb miss (a1)	ld unit uop (a6)	st unit uop (a7)	l1d cache writeback (a8)	a9	ac	c2	branch cond mispred nonspec (c5)	cd	cf	d5	map dispatch bubble (d6)	dd	fetch restart (de)	e0	? int output thing (e9)	? simd retires (ee)	? int retires (ef)	f5	f6	f7	f8	fd
10024	100037	750	0	0	0	0	0	0	61	89648	25	10010	10	10000	10	10000	50	3582941	1	100018	0	100037	100037	98267	0	3	98767	10010	20	10000	20	10000	100037	100037	1	1	10021	10	9	10	10	10000	10	0	0	0	0	0	0	0	0	0	0	640	2	16	2	2	99578	0	10000	10	100038	100038	100038	100038	100038
10024	100037	749	0	0	0	0	0	0	61	89648	25	10010	10	10000	10	10000	50	3582941	0	100018	0	100037	100037	98267	0	3	98767	10010	20	10000	20	10000	100037	100037	1	1	10021	10	9	10	10	10000	10	0	0	0	0	0	0	0	0	0	0	640	2	16	2	2	99578	0	10000	10	100038	100038	100038	100038	100038
10024	100071	749	0	0	0	0	0	0	3721	89648	25	10010	10	10000	10	10000	50	3582941	0	100018	0	100037	100037	98267	0	3	98767	10010	20	10000	20	10000	100037	100037	1	1	10021	10	9	10	10	10000	10	0	0	0	0	0	0	0	0	0	0	640	2	16	2	2	99578	0	10000	10	100038	100038	100038	100081	100038
10024	100037	749	0	0	0	0	0	0	61	89648	25	10010	10	10000	10	10000	50	3582941	0	100018	0	100037	100037	98267	0	3	98767	10010	20	10000	20	10000	100037	100037	1	1	10021	10	9	10	10	10000	10	0	0	0	0	0	0	0	0	0	0	640	2	16	2	2	99578	0	10000	10	100038	100038	100038	100038	100038
10024	100037	749	0	0	0	0	0	0	61	89648	25	10010	10	10000	10	10039	50	3582941	1	100018	0	100037	100037	98267	0	3	98767	10010	20	10000	20	10000	100037	100037	1	1	10021	10	9	10	10	10000	10	0	0	0	0	0	0	0	0	0	0	640	2	16	2	2	99578	0	10000	10	100038	100038	100038	100038	100038
10024	100037	750	0	0	0	0	0	0	103	89648	25	10010	10	10000	10	10000	50	3582941	0	100018	0	100037	100037	98267	0	3	98767	10010	20	10000	20	10000	100070	100037	1	1	10021	10	9	10	10	10000	10	0	0	0	0	0	0	0	0	0	0	640	2	16	2	2	99578	0	10000	10	100038	100038	100038	100038	100038
10024	100037	749	0	0	0	0	0	0	61	89648	25	10010	10	10000	10	10000	50	3582941	1	100018	0	100037	100037	98267	0	3	98767	10010	20	10000	20	10000	100037	100037	1	1	10021	10	9	10	10	10000	10	0	0	0	0	0	0	0	0	0	0	640	1	16	2	2	99578	0	10000	10	100038	100038	100038	100038	100038
10024	100037	749	0	0	0	0	0	0	61	89648	25	10010	10	10000	10	10000	50	3582941	0	100018	0	100037	100037	98267	0	3	98767	10010	20	10000	20	10000	100037	100037	1	1	10021	10	9	10	10	10000	10	0	0	0	0	0	0	0	0	0	0	640	2	16	2	2	99578	0	10000	10	100038	100038	100038	100038	100038
10024	100037	749	0	0	0	0	0	0	61	89648	54	10010	10	10000	10	10000	50	3582941	1	100018	0	100037	100037	98267	3	3	98767	10010	20	10000	20	10000	100037	100037	1	1	10021	10	9	10	10	10000	10	0	0	0	0	0	0	0	0	0	0	640	2	16	2	2	99578	0	10000	10	100038	100038	100038	100038	100038
10024	100037	749	0	0	0	0	0	0	61	89648	25	10010	10	10000	10	10000	50	3582941	1	100018	0	100037	100037	98267	0	3	98767	10010	20	10000	20	10000	100037	100037	1	1	10021	10	9	10	10	10000	10	0	0	0	0	0	0	0	0	0	0	640	2	16	2	2	99578	0	10000	10	100038	100038	100038	100038	100038

Test 3: throughput

Count: 8

Code:

  fsqrt s0, s8
  fsqrt s1, s8
  fsqrt s2, s8
  fsqrt s3, s8
  fsqrt s4, s8
  fsqrt s5, s8
  fsqrt s6, s8
  fsqrt s7, s8

Initialization

  movi v8.16b, 9

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code divided by count): 2.0006

All non-zero counters (first 10 of 64 runs)

retire uop (01)	cycle (02)	03	mmu table walk instruction (07)	mmu table walk data (08)	l2 tlb miss instruction (0a)	l2 tlb miss data (0b)	18	19	1e	1f	3f	4e	51	schedule uop (52)	schedule int uop (53)	schedule simd uop (54)	dispatch int uop (56)	dispatch simd uop (57)	int uops in schedulers (59)	ldst uops in schedulers (5b)	60	69	6b	6d	6e	map stall dispatch (70)	map rewind (75)	map stall (76)	dispatch uop (78)	map int uop (7c)	map simd uop (7e)	map int uop inputs (7f)	map simd uop inputs (81)	82	83	flush restart other nonspec (84)	85	inst all (8c)	inst branch (8d)	inst branch taken (90)	inst branch cond (94)	inst int alu (97)	inst simd alu (9a)	9f	l1d tlb access (a0)	l1d cache writeback (a8)	ac	branch cond mispred nonspec (c5)	branch mispred nonspec (cb)	cd	cf	d5	map dispatch bubble (d6)	dd	fetch restart (de)	e0	? int output thing (e9)	? simd retires (ee)	? int retires (ef)	f5	f6	f7	f8	fd
80204	160045	1199	0	0	1	0	0	0	9	0	349	79937	25	80100	100	80000	100	80000	500	5677984	1	160026	0	160045	160045	149895	6	149999	80100	200	80008	200	80008	160045	160045	1	1	80201	100	99	100	100	80000	100	0	0	0	1	1	1	5117	2	16	1	1	159985	0	80000	100	160046	160046	160046	160046	160046
80204	160045	1198	1	0	1	0	0	0	0	0	726	79937	25	80100	100	80000	100	80000	500	5677984	0	160026	0	160045	160045	149895	6	149999	80100	200	80008	200	80008	160045	160045	1	1	80201	100	99	100	100	80000	100	0	0	0	1	1	1	5117	1	16	1	1	159985	0	80000	100	160046	160046	160046	160046	160046
80204	160045	1199	1	0	1	0	0	0	0	0	61	79937	25	80100	100	80000	100	80000	500	5677984	1	160026	0	160045	160045	149895	6	149999	80100	200	80008	200	80008	160045	160045	1	1	80201	100	99	100	100	80000	100	0	0	0	1	1	1	5117	1	16	1	1	159985	24	80000	100	160046	160046	160046	160046	160046
80204	160045	1198	2	0	1	0	0	0	0	0	935	79937	25	80100	100	80000	100	80000	500	5677984	1	160026	0	160045	160045	149895	6	150155	80100	200	80008	200	80008	160045	160266	1	1	80201	100	99	100	100	80000	100	0	0	0	1	1	1	5117	1	16	1	1	160157	0	80000	100	160046	160046	160046	160046	160046
80204	160045	1198	1	0	1	0	0	0	0	0	61	79937	25	80100	100	80000	100	80000	500	5677984	0	160026	0	160045	160045	149895	6	149999	80100	200	80008	200	80008	160045	160045	3	1	80201	100	99	100	100	80000	100	0	1	3791	1	1	1	5117	1	49	1	1	159985	0	80000	100	160046	160101	160046	160046	160046
80204	160045	1199	1	0	1	0	0	0	24	352	82	79937	25	80100	100	80000	100	80000	500	5677984	1	160026	0	160045	160045	149895	6	149999	80100	200	80008	200	80008	160045	160045	1	1	80201	100	99	100	100	80000	100	0	0	0	1	1	1	5117	1	32	1	1	159985	0	80000	100	160046	160046	160046	160046	160046
80204	160045	1199	1	0	1	0	0	0	0	0	726	79937	25	80100	100	80000	100	80000	500	5677984	0	160026	0	160045	160045	149895	6	149999	80100	200	80008	200	80008	160045	160045	1	1	80201	100	99	100	100	80000	100	0	1	0	1	1	1	5117	1	16	1	1	159985	0	80000	100	160046	160046	160046	160046	160046
80204	160045	1200	1	0	1	0	0	0	0	0	1114	79937	25	80100	100	80000	100	80000	500	5677984	0	160026	0	160045	160045	149895	6	149999	80100	200	80008	200	80008	160045	160045	1	1	80201	100	99	100	100	80000	100	0	0	3	1	1	1	5117	1	16	1	1	159985	0	80000	100	160046	160046	160046	160046	160046
80204	160045	1199	1	0	1	0	0	0	0	0	61	79937	25	80100	100	80000	100	80000	500	5677984	1	160026	0	160045	160045	149895	6	149999	80100	200	80008	200	80008	160045	160045	1	1	80201	100	99	100	100	80000	100	0	0	0	1	1	1	5117	1	16	1	1	160211	0	80000	100	160046	160046	160046	160046	160046
80204	160045	1198	1	0	1	0	0	0	0	0	61	79937	25	80100	100	80000	100	80000	500	5677984	1	160026	0	160045	160045	149895	6	149999	80100	200	80008	200	80008	160045	160045	1	1	80201	100	99	100	100	80000	100	0	0	0	1	1	1	5117	2	16	1	1	159985	0	80000	100	160046	160046	160046	160046	160046

1000 unrolls and 10 iterations

Result (median cycles for code divided by count): 2.0006

All non-zero counters (first 10 of 64 runs)

retire uop (01)	cycle (02)	03	1e	3f	4e	51	schedule uop (52)	schedule int uop (53)	schedule simd uop (54)	dispatch int uop (56)	dispatch simd uop (57)	int uops in schedulers (59)	ldst uops in schedulers (5b)	60	61	69	6d	6e	map stall dispatch (70)	simd prf full (72)	map rewind (75)	map stall (76)	dispatch uop (78)	map int uop (7c)	map simd uop (7e)	map int uop inputs (7f)	map simd uop inputs (81)	82	83	flush restart other nonspec (84)	85	inst all (8c)	inst branch (8d)	inst branch taken (90)	inst branch cond (94)	inst int alu (97)	inst simd alu (9a)	9f	l1d tlb miss (a1)	l1d cache writeback (a8)	ac	branch cond mispred nonspec (c5)	branch mispred nonspec (cb)	cf	d0	d2	l1i cache miss demand (d3)	d5	map dispatch bubble (d6)	dd	fetch restart (de)	e0	? simd retires (ee)	? int retires (ef)	f5	f6	f7	f8	fd
80024	160045	1198	0	61	79937	25	80010	10	80000	10	80000	50	5677984	1	5	160026	160045	160045	149910	0	3	150025	80010	20	80000	20	80000	160045	160045	1	1	80021	10	9	10	10	80000	10	0	0	0	0	0	5020	0	0	0	3	16	3	3	159972	80000	10	160046	160046	160046	160046	160046
80024	160045	1198	0	726	79937	25	80010	10	80000	10	80000	50	5677984	0	0	160026	160045	160045	149910	0	3	150025	80010	20	80000	20	80000	160045	160045	1	1	80021	10	9	10	10	80000	10	0	1	0	0	0	5020	5	0	0	2	16	2	3	159972	80000	10	160046	160046	160046	160046	160046
80024	160045	1198	1239	61	79937	25	80010	10	80000	10	80000	50	5677984	1	5	160026	160100	160045	149910	0	3	150025	80010	20	80000	20	80000	160045	160045	1	1	80021	10	9	10	10	80000	10	4	0	895	0	0	5020	0	0	0	3	16	4	2	160365	80000	10	160046	160046	160434	160376	160046
80024	160045	1199	0	768	79937	25	80010	10	80000	10	80000	50	5677984	1	5	160026	160045	160045	149910	0	3	150025	80010	20	80000	20	80000	160045	160045	2	1	80021	10	9	10	10	80000	10	0	0	0	0	0	5020	0	0	0	3	16	4	3	159972	80000	10	160046	160046	160046	160046	160046
80024	160045	1199	0	61	79937	25	80010	10	80000	10	80000	50	5678185	0	5	160026	160045	160045	149910	0	3	150025	80010	20	80000	20	80000	160045	160045	1	1	80021	10	9	10	10	80000	10	0	0	0	0	0	5020	0	0	0	3	16	2	3	160013	80000	10	160046	160046	160046	160046	160046
80024	160045	1199	987	61	79937	25	80010	10	80000	10	80000	50	5677984	0	0	160026	160045	160045	149910	0	3	150025	80010	20	80000	20	80000	160045	160045	1	1	80021	10	9	10	10	80000	10	0	0	0	0	0	5020	0	0	2	3	16	4	3	159972	80000	10	160046	160046	160046	160046	160046
80024	160045	1199	0	726	79937	25	80010	10	80000	10	80000	50	5677984	1	0	160026	160045	160045	149910	0	3	150025	80010	20	80000	20	80000	160045	160045	1	1	80021	10	9	10	10	80000	10	0	0	0	0	0	5020	5	4	0	3	16	3	3	159972	80000	10	160046	160046	160046	160046	160046
80024	160045	1199	0	61	79937	25	80010	10	80000	10	80048	50	5677984	1	5	160026	160045	160045	149910	0	3	150025	80010	20	80000	20	80000	160045	160045	1	1	80021	10	9	10	10	80000	10	0	0	0	0	0	5020	5	4	0	3	16	3	3	159972	80000	10	160046	160046	160046	160046	160046
80024	160045	1199	0	726	79937	25	80010	10	80000	10	80000	50	5677984	1	5	160081	160045	160045	149910	0	3	150025	80010	20	80000	20	80000	160101	160045	1	1	80021	10	9	10	10	80000	10	0	0	0	0	0	5020	5	4	0	6	16	3	4	159972	80000	10	160046	160046	160046	160046	160046
80024	160045	1198	360	61	79937	25	80010	10	80000	10	80000	50	5677984	1	5	160026	160045	160045	149910	0	3	150025	80010	20	80000	20	80000	160045	160045	1	1	80021	10	9	10	10	80000	10	0	4	0	0	0	5020	5	4	0	3	16	3	2	159972	80000	10	160101	160046	160046	160046	160046

FSQRT (scalar, S)

Test 1: uops

1000 unrolls and 1 iteration

Test 2: Latency 1->2

100 unrolls and 100 iterations

1000 unrolls and 10 iterations

Test 3: throughput

100 unrolls and 100 iterations

1000 unrolls and 10 iterations