OV - exec - Function field_summary(global_variables&, parallel_&) [clone ._omp

	Function: field_summary(global_variables&, parallel_&) [clone ._omp_fn.0]	Module: exec	Source: field_summary.cpp:75-91 [...]	Coverage (incl. loops): 0.33% \| (excl. loops): 0.00%

/home/hbollore/qaas/qaas-runs/174-169-1878/intel/CloverLeaf2.0-CXX/build/CloverLeaf2.0-CXX/src/omp/field_summary.cpp: 75 - 91

--------------------------------------------------------------------------------

75: #pragma omp parallel for simd reduction(+ : press) reduction(+ : ke) reduction(+ : ie) reduction(+ : mass) reduction(+ : vol)

76:     for (int idx = (0); idx < ((ymax - ymin + 1) * (xmax - xmin + 1)); idx++) {

77:       const int j = xmin + 1 + idx % (xmax - xmin + 1);

78:       const int k = ymin + 1 + idx / (xmax - xmin + 1);

79:       double vsqrd = 0.0;

80:       for (int kv = k; kv <= k + 1; ++kv) {

81:         for (int jv = j; jv <= j + 1; ++jv) {

82:           vsqrd += 0.25 * (field.xvel0(jv, kv) * field.xvel0(jv, kv) + field.yvel0(jv, kv) * field.yvel0(jv, kv));

83:         }

84:       }

85:       double cell_vol = field.volume(j, k);

86:       double cell_mass = cell_vol * field.density0(j, k);

87:       vol += cell_vol;

88:       mass += cell_mass;

89:       ie += cell_mass * field.energy0(j, k);

90:       ke += cell_mass * 0.5 * vsqrd;

91:       press += cell_vol * field.pressure(j, k);

/home/hbollore/qaas/qaas-runs/174-169-1878/intel/CloverLeaf2.0-CXX/build/CloverLeaf2.0-CXX/src/omp/context.h: 69 - 69

--------------------------------------------------------------------------------

69:   T &operator()(size_t i, size_t j) const { return data[i + j * sizeX]; }

0x426620 STP	X29, X30, [SP, #912]!

0x426624 ADD	X29, SP, #0

0x426628 STP	X19, X20, [SP, #16]

0x42662c ORR	X19, XZR, X0

0x426630 STP	X21, X22, [SP, #32]

0x426634 STP	X23, X24, [SP, #48]

0x426638 STR	D15, [SP, #72]

0x42663c LDP	W21, W24, [X0, #48]

0x426640 LDP	W0, W23, [X0, #56]

0x426644 SUB	W1, W21, W24

0x426648 ADD	W2, W1, #1

0x42664c SUB	W3, W0, W23

0x426650 ADD	W20, W3, #1

0x426654 MADD	W21, W3, W2, W2

0x426658 BL	403890

0x42665c ORR	W22, WZR, W0

0x426660 BL	4038c0

0x426664 SDIV	W4, W21, W22

0x426668 MSUB	W5, W4, W22, W21

0x42666c CMP	W0, W5

0x426670 B.LT	426810

0x426674 MADD	W5, W4, W0, W5

0x426678 ADD	W0, W4, W5

0x42667c CMP	W5, W0

0x426680 B.GE	4267bc

0x426684 LDR	X12, [X19]

0x426688 MOVI	D15, #0

0x42668c FMOV	V21.2D, #0.2500000

0x426690 ADD	W11, W24, #1

0x426694 ADD	W21, W23, #1

0x426698 FMOV	D19, #0.5000000

0x42669c SBFM	X10, X23, #0, #31

0x4266a0 FMOV	D22, D15

0x4266a4 FMOV	D27, D15

0x4266a8 ORR	X15, XZR, X12

0x4266ac FMOV	D23, D15

0x4266b0 FMOV	D24, D15

0x4266b4 LDR	X30, [X12, #16]

0x4266b8 LDR	X18, [X15], #48

0x4266bc LDR	X17, [X12, #48]

0x4266c0 LDR	X16, [X12, #96]

0x4266c4 LDR	X15, [X15, #16]

0x4266c8 LDR	X14, [X12, #112]

0x4266cc LDR	X9, [X12, #168]

0x4266d0 LDR	X8, [X12, #184]

0x4266d4 LDR	X7, [X12, #216]

0x4266d8 LDR	X6, [X12, #232]

0x4266dc LDR	X13, [X12, #656]

0x4266e0 LDR	X12, [X12, #672]

0x4266e4 STR	X25, [SP, #64]

(312) 0x4266e8 SDIV	W25, W5, W20

(312) 0x4266ec ADD	W24, W25, W11

(312) 0x4266f0 MSUB	W23, W25, W20, W5

(312) 0x4266f4 ADD	X1, X10, W23,SXTW

(312) 0x4266f8 ADD	X2, X1, #1

(312) 0x4266fc ADD	W3, W24, #1

(312) 0x426700 SBFM	X22, X24, #0, #31

(312) 0x426704 SBFM	X25, X3, #0, #31

(312) 0x426708 ADD	W5, W5, #1

(312) 0x42670c MADD	X24, X22, X7, X2

(312) 0x426710 ADD	W4, W23, W21

(312) 0x426714 MADD	X23, X25, X7, X2

(312) 0x426718 SBFM	X1, X4, #0, #31

(312) 0x42671c MADD	X3, X25, X9, X2

(312) 0x426720 UBFM	X24, X24, #61, #60

(312) 0x426724 MADD	X2, X22, X9, X2

(312) 0x426728 UBFM	X4, X23, #61, #60

(312) 0x42672c MADD	X25, X22, X13, X1

(312) 0x426730 LDR	Q30, [X6, X24]

(312) 0x426734 UBFM	X3, X3, #61, #60

(312) 0x426738 MADD	X24, X22, X18, X1

(312) 0x42673c UBFM	X2, X2, #61, #60

(312) 0x426740 MADD	X23, X17, X22, X1

(312) 0x426744 LDR	Q31, [X6, X4]

(312) 0x426748 MADD	X22, X22, X16, X1

(312) 0x42674c LDR	Q26, [X8, X3]

(312) 0x426750 LDR	Q25, [X8, X2]

(312) 0x426754 FMUL	V0.2D, V30.2D, V30.2D

(312) 0x426758 FMUL	V1.2D, V31.2D, V31.2D

(312) 0x42675c LDR	D28, [X12, X25,LSL #3]

(312) 0x426760 LDR	D29, [X30, X24,LSL #3]

(312) 0x426764 FMLA	V0.2D, V25.2D, V25.2D

(312) 0x426768 LDR	D2, [X15, X23,LSL #3]

(312) 0x42676c LDR	D20, [X14, X22,LSL #3]

(312) 0x426770 FADD	D24, D24, D28

(312) 0x426774 FMLA	V1.2D, V26.2D, V26.2D

(312) 0x426778 FMUL	D3, D28, D29

(312) 0x42677c FMADD	D15, D28, D20, D15

(312) 0x426780 FMUL	V4.2D, V0.2D, V21.2D

(312) 0x426784 FMADD	D27, D3, D2, D27

(312) 0x426788 FADD	D23, D23, D3

(312) 0x42678c FMUL	V5.2D, V1.2D, V21.2D

(312) 0x426790 FADDP	D6, V4.2D

(312) 0x426794 FADDP	D7, V5.2D

(312) 0x426798 FADD	D16, D7, D6

(312) 0x42679c FMUL	D17, D16, D19

(312) 0x4267a0 FMADD	D22, D3, D17, D22

(312) 0x4267a4 CMP	W0, W5

(312) 0x4267a8 B.NE	4266e8

0x4267ac LDR	X25, [SP, #64]

0x4267b0 MOV	V27.D[1], V22.D[0]

0x4267b4 STP	D24, D23, [SP, #96]

0x4267b8 B	4267c8

0x4267bc MOVI	V27.2D, #0

0x4267c0 FMOV	D15, D27

0x4267c4 STR	Q27, [SP, #96]

0x4267c8 STR	Q27, [SP, #80]

0x4267cc BL	403c40

0x4267d0 LDP	Q30, Q31, [SP, #80]

0x4267d4 LDUR	Q18, [X19, #8]

0x4267d8 LDUR	Q21, [X19, #24]

0x4267dc LDR	D27, [X19, #40]

0x4267e0 FADD	V26.2D, V18.2D, V31.2D

0x4267e4 FADD	V25.2D, V21.2D, V30.2D

0x4267e8 FADD	D19, D27, D15

0x4267ec LDR	D15, [SP, #72]

0x4267f0 STUR	Q26, [X19, #8]

0x4267f4 STUR	Q25, [X19, #24]

0x4267f8 STR	D19, [X19, #40]

0x4267fc LDP	X19, X20, [SP, #16]

0x426800 LDP	X21, X22, [SP, #32]

0x426804 LDP	X23, X24, [SP, #48]

0x426808 LDP	X29, X30, [SP], #112

0x42680c B	403790

0x426810 ADD	W4, W4, #1

0x426814 MOVZ	W5, #0

0x426818 B	426674

0x42681c HINT	#0

Coverage (%)	Name	Source Location	Module
►98.96+	gomp_thread_start	team.c:130	libgomp.so.1.0.0
○	start_thread		libc.so.6
○	thread_start		libc.so.6

min	med	avg	max

Percentile Index	10	20	30	40	50	60	70	80	90	100
Value

min	med	avg	max

Percentile Index	10	20	30	40	50	60	70	80	90	100
Value

Path /

Average path: Display a virtual path defined by average values of all real paths

The code analyzed by CQA in that panel excludes loops and represents 0.00% of application time for run gcc_7

Source file and lines	field_summary.cpp:75-91
Module	exec

The function is defined in:

/home/hbollore/qaas/qaas-runs/174-169-1878/intel/CloverLeaf2.0-CXX/build/CloverLeaf2.0-CXX/src/omp/field_summary.cpp:75-91
/home/hbollore/qaas/qaas-runs/174-169-1878/intel/CloverLeaf2.0-CXX/build/CloverLeaf2.0-CXX/src/omp/context.h:69

Warnings:
Ignoring paths for analysis

gain
potential
hint
expert

Vectorization

Your function is not vectorized. Only 60% of vector register length is used (average across all VPU instructions).

Details

18% of VPU instructions are used in vector version (process two or more data elements in vector registers):

15% of VPU loads are used in vector version.
41% of VPU stores are used in vector version.
20% of VPU addition or subtraction instructions are used in vector version.
0% of VPU fused multiply-add instructions are used in vector version.
6% of VPU instructions that are not load, store, addition, subtraction nor multiply instructions are used in vector version.

Expensive FP math instructions/calls

Detected performance impact from expensive FP math instructions/calls. By removing/reexpressing them, you can lower the cost of an iteration from 12.50 to 1.50 cycles (8.33x speedup).

Matching between your function (in the source code) and the binary function

The binary function is composed of 5 FP arithmetical operations:

5: addition or subtraction

The binary function is loading 272 bytes. The binary function is storing 168 bytes.

Arithmetic intensity

Arithmetic intensity is 0.01 FP operations per loaded or stored byte.

General properties

nb instructions	79
loop length	316
nb stack references	0

Front-end

FIT IN UOP CACHE

front end

9.75 cycles

Back-end

	P0	P1	P2	P3	P4	P5	P6	P7	P8	P9	P10	P11	P12	P13	P14	P15	P16
uops	4.00	4.00	4.25	4.08	4.17	4.17	4.17	4.17	5.00	5.00	5.00	5.00	12.33	12.33	12.33	2.50	2.50
cycles	4.00	4.00	4.25	4.08	4.17	4.17	4.17	4.17	5.00	5.00	5.00	5.00	12.33	12.33	12.33	2.50	2.50

Execution ports to units layout:

P0: BRU
P1: BRU
P2: ALU
P3: ALU
P4: ALU
P5: ALU
P6: ALU
P7: ALU
P8 (128 bits): VPU, FP store data, ALU, DIV/SQRT
P9 (128 bits): VPU, ALU, FP store data
P10 (128 bits): VPU, ALU, DIV/SQRT
P11 (128 bits): ALU, VPU
P12 (256 bits): store address, load
P13 (256 bits): store address, load
P14 (256 bits): load
P15 (64 bits): store data
P16 (64 bits): store data

Cycles executing div or sqrt instructions

5.00-12.50

Cycles summary

Front-end	9.75
Overall L1	12.33-12.50

Vectorization ratios

INT

all	16%
load	15%
store	41%
mul	NA (no mul vectorizable/vectorized instructions)
add-sub	0%
fma	0%
other	0%

all	30%
load	NA (no load vectorizable/vectorized instructions)
store	NA (no store vectorizable/vectorized instructions)
mul	NA (no mul vectorizable/vectorized instructions)
add-sub	66%
fma	NA (no fma vectorizable/vectorized instructions)
div/sqrt	NA (no div/sqrt vectorizable/vectorized instructions)
other	14%

INT+FP

all	18%
load	15%
store	41%
mul	NA (no mul vectorizable/vectorized instructions)
add-sub	20%
fma	0%
div/sqrt	NA (no div/sqrt vectorizable/vectorized instructions)
other	6%

Cycles and memory resources usage

Assuming all data fit into the L1 cache, each call to the function takes 12.50 cycles. At this rate:

22% of peak load performance is reached (21.76 out of 96.00 bytes loaded per cycle (GB/s @ 1GHz))
28% of peak store performance is reached (13.44 out of 48.00 bytes stored per cycle (GB/s @ 1GHz))

ASM code

In the binary file, the address of the function is: 426620

Instruction	Nb FU	P0	P1	P2	P3	P4	P5	P6	P7	P8	P9	P10	P11	P12	P13	P14	P15	P16	Latency	Recip. throughput	Vectorization
STP X29, X30, [SP, #912]!	1	0	0	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0.50	0.50	0	0.50	0.50	1	0.50	scal (100.0%)
ADD X29, SP, #0	1	0	0	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	1	0.17	scal (50.0%)
STP X19, X20, [SP, #16]	1	0	0	0	0	0	0	0	0	0	0	0	0	0.50	0.50	0	0.50	0.50	1	0.50	scal (100.0%)
ORR X19, XZR, X0	1	0	0	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	1	0.17	N/A
STP X21, X22, [SP, #32]	1	0	0	0	0	0	0	0	0	0	0	0	0	0.50	0.50	0	0.50	0.50	1	0.50	scal (100.0%)
STP X23, X24, [SP, #48]	1	0	0	0	0	0	0	0	0	0	0	0	0	0.50	0.50	0	0.50	0.50	1	0.50	scal (100.0%)
STR D15, [SP, #72]	1	0	0	0	0	0	0	0	0	0.50	0.50	0	0	0.50	0.50	0	0	0	2	0.50	scal (50.0%)
LDP W21, W24, [X0, #48]	1	0	0	0	0	0	0	0	0	0	0	0	0	0.33	0.33	0.33	0	0	4	0.33	scal (50.0%)
LDP W0, W23, [X0, #56]	1	0	0	0	0	0	0	0	0	0	0	0	0	0.33	0.33	0.33	0	0	4	0.33	N/A
SUB W1, W21, W24	1	0	0	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	1	0.17	scal (25.0%)
ADD W2, W1, #1	1	0	0	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	1	0.17	scal (25.0%)
SUB W3, W0, W23	1	0	0	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	1	0.17	scal (25.0%)
ADD W20, W3, #1	1	0	0	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	1	0.17	scal (25.0%)
MADD W21, W3, W2, W2	1	0	0	0	0	0	0	1	0	0	0	0	0	0	0	0	0	0	2	1	scal (25.0%)
BL 403890 <@plt_start@+0x200>	1	0.50	0.50	0.50	0.50	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.50	N/A
ORR W22, WZR, W0	1	0	0	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	1	0.17	scal (25.0%)
BL 4038c0 <@plt_start@+0x230>	1	0.50	0.50	0.50	0.50	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.50	N/A
SDIV W4, W21, W22	1	0	0	0	0	0	0	1	0	0	0	0	0	0	0	0	0	0	5-12	5-12.50	N/A
MSUB W5, W4, W22, W21	1	0	0	0	0	0	0	1	0	0	0	0	0	0	0	0	0	0	2	1	scal (25.0%)
CMP W0, W5	1	0	0	0.25	0.25	0	0	0.25	0.25	0	0	0	0	0	0	0	0	0	1	0.33	scal (25.0%)
B.LT 426810 <_Z13field_summaryR16global_variablesR9parallel_._omp_fn.0+0x1f0>	1	0.50	0.50	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.50	N/A
MADD W5, W4, W0, W5	1	0	0	0	0	0	0	1	0	0	0	0	0	0	0	0	0	0	2	1	scal (25.0%)
ADD W0, W4, W5	1	0	0	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	1	0.17	N/A
CMP W5, W0	1	0	0	0.25	0.25	0	0	0.25	0.25	0	0	0	0	0	0	0	0	0	1	0.33	scal (25.0%)
B.GE 4267bc <_Z13field_summaryR16global_variablesR9parallel_._omp_fn.0+0x19c>	1	0.50	0.50	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.50	N/A
LDR X12, [X19]	1	0	0	0	0	0	0	0	0	0	0	0	0	0.33	0.33	0.33	0	0	4	0.33	N/A
MOVI D15, #0	1	0	0	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	2	0.25	scal (50.0%)
FMOV V21.2D, #0.2500000	1	0	0	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	2	0.25	vect (100.0%)
ADD W11, W24, #1	1	0	0	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	1	0.17	scal (25.0%)
ADD W21, W23, #1	1	0	0	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	1	0.17	scal (25.0%)
FMOV D19, #0.5000000	1	0	0	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	2	0.25	scal (50.0%)
SBFM X10, X23, #0, #31	1	0	0	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	1	0.17	scal (100.0%)
FMOV D22, D15	1	0	0	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	2	0.25	scal (50.0%)
FMOV D27, D15	1	0	0	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	2	0.25	scal (50.0%)
ORR X15, XZR, X12	1	0	0	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	1	0.17	N/A
FMOV D23, D15	1	0	0	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	2	0.25	scal (50.0%)
FMOV D24, D15	1	0	0	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	2	0.25	scal (50.0%)
LDR X30, [X12, #16]	1	0	0	0	0	0	0	0	0	0	0	0	0	0.33	0.33	0.33	0	0	4	0.33	scal (50.0%)
LDR X18, [X15], #48	1	0	0	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0.33	0.33	0.33	0	0	4	0.33	scal (50.0%)
LDR X17, [X12, #48]	1	0	0	0	0	0	0	0	0	0	0	0	0	0.33	0.33	0.33	0	0	4	0.33	scal (50.0%)
LDR X16, [X12, #96]	1	0	0	0	0	0	0	0	0	0	0	0	0	0.33	0.33	0.33	0	0	4	0.33	scal (50.0%)
LDR X15, [X15, #16]	1	0	0	0	0	0	0	0	0	0	0	0	0	0.33	0.33	0.33	0	0	4	0.33	N/A
LDR X14, [X12, #112]	1	0	0	0	0	0	0	0	0	0	0	0	0	0.33	0.33	0.33	0	0	4	0.33	scal (50.0%)
LDR X9, [X12, #168]	1	0	0	0	0	0	0	0	0	0	0	0	0	0.33	0.33	0.33	0	0	4	0.33	scal (50.0%)
LDR X8, [X12, #184]	1	0	0	0	0	0	0	0	0	0	0	0	0	0.33	0.33	0.33	0	0	4	0.33	scal (50.0%)
LDR X7, [X12, #216]	1	0	0	0	0	0	0	0	0	0	0	0	0	0.33	0.33	0.33	0	0	4	0.33	scal (50.0%)
LDR X6, [X12, #232]	1	0	0	0	0	0	0	0	0	0	0	0	0	0.33	0.33	0.33	0	0	4	0.33	scal (50.0%)
LDR X13, [X12, #656]	1	0	0	0	0	0	0	0	0	0	0	0	0	0.33	0.33	0.33	0	0	4	0.33	scal (50.0%)
LDR X12, [X12, #672]	1	0	0	0	0	0	0	0	0	0	0	0	0	0.33	0.33	0.33	0	0	4	0.33	N/A
STR X25, [SP, #64]	1	0	0	0	0	0	0	0	0	0	0	0	0	0.50	0.50	0	0.50	0.50	1	0.50	scal (50.0%)
LDR X25, [SP, #64]	1	0	0	0	0	0	0	0	0	0	0	0	0	0.33	0.33	0.33	0	0	4	0.33	scal (50.0%)
MOV V27.D[1], V22.D[0]	1	0	0	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	2	0.25	scal (50.0%)
STP D24, D23, [SP, #96]	1	0	0	0	0	0	0	0	0	0.50	0.50	0	0	0.50	0.50	0	0	0	2	0.50	vect (100.0%)
B 4267c8 <_Z13field_summaryR16global_variablesR9parallel_._omp_fn.0+0x1a8>	1	0.50	0.50	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.50	N/A
MOVI V27.2D, #0	1	0	0	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	2	0.25	scal (50.0%)
FMOV D15, D27	1	0	0	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	2	0.25	scal (50.0%)
STR Q27, [SP, #96]	1	0	0	0	0	0	0	0	0	0.50	0.50	0	0	0.50	0.50	0	0	0	2	0.50	vect (100.0%)
STR Q27, [SP, #80]	1	0	0	0	0	0	0	0	0	0.50	0.50	0	0	0.50	0.50	0	0	0	2	0.50	vect (100.0%)
BL 403c40 <@plt_start@+0x5b0>	1	0.50	0.50	0.50	0.50	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.50	N/A
LDP Q30, Q31, [SP, #80]	1	0	0	0	0	0	0	0	0	0	0	0	0	0.33	0.33	0.33	0	0	6	0.67	vect (100.0%)
LDUR Q18, [X19, #8]	1	0	0	0	0	0	0	0	0	0	0	0	0	0.33	0.33	0.33	0	0	6	0.33	vect (100.0%)
LDUR Q21, [X19, #24]	1	0	0	0	0	0	0	0	0	0	0	0	0	0.33	0.33	0.33	0	0	6	0.33	vect (100.0%)
LDR D27, [X19, #40]	1	0	0	0	0	0	0	0	0	0	0	0	0	0.33	0.33	0.33	0	0	6	0.33	scal (50.0%)
FADD V26.2D, V18.2D, V31.2D	1	0	0	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	2	0.25	vect (100.0%)
FADD V25.2D, V21.2D, V30.2D	1	0	0	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	2	0.25	vect (100.0%)
FADD D19, D27, D15	1	0	0	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	2	0.25	scal (50.0%)
LDR D15, [SP, #72]	1	0	0	0	0	0	0	0	0	0	0	0	0	0.33	0.33	0.33	0	0	6	0.33	scal (50.0%)
STUR Q26, [X19, #8]	1	0	0	0	0	0	0	0	0	0.50	0.50	0	0	0.50	0.50	0	0	0	2	0.50	vect (100.0%)
STUR Q25, [X19, #24]	1	0	0	0	0	0	0	0	0	0.50	0.50	0	0	0.50	0.50	0	0	0	2	0.50	vect (100.0%)
STR D19, [X19, #40]	1	0	0	0	0	0	0	0	0	0.50	0.50	0	0	0.50	0.50	0	0	0	2	0.50	scal (50.0%)
LDP X19, X20, [SP, #16]	1	0	0	0	0	0	0	0	0	0	0	0	0	0.33	0.33	0.33	0	0	4	0.50	N/A
LDP X21, X22, [SP, #32]	1	0	0	0	0	0	0	0	0	0	0	0	0	0.33	0.33	0.33	0	0	4	0.50	scal (100.0%)
LDP X23, X24, [SP, #48]	1	0	0	0	0	0	0	0	0	0	0	0	0	0.33	0.33	0.33	0	0	4	0.50	scal (100.0%)
LDP X29, X30, [SP], #112	1	0	0	0	0	0	0	0	0	0	0	0	0	0.33	0.33	0.33	0	0	4	0.50	scal (100.0%)
B 403790 <@plt_start@+0x100>	1	0.50	0.50	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.50	N/A
ADD W4, W4, #1	1	0	0	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	1	0.17	N/A
MOVZ W5, #0	1	0	0	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	1	0.17	scal (25.0%)
B 426674 <_Z13field_summaryR16global_variablesR9parallel_._omp_fn.0+0x54>	1	0.50	0.50	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.50	N/A
HINT #0																					N/A

The code analyzed by CQA in that panel excludes loops and represents 0.00% of application time for run gcc_7

Source file and lines	field_summary.cpp:75-91
Module	exec

The function is defined in:

/home/hbollore/qaas/qaas-runs/174-169-1878/intel/CloverLeaf2.0-CXX/build/CloverLeaf2.0-CXX/src/omp/field_summary.cpp:75-91
/home/hbollore/qaas/qaas-runs/174-169-1878/intel/CloverLeaf2.0-CXX/build/CloverLeaf2.0-CXX/src/omp/context.h:69

Warnings:
Ignoring paths for analysis

gain
potential
hint
expert

Vectorization

Your function is not vectorized. Only 60% of vector register length is used (average across all VPU instructions).

Details

18% of VPU instructions are used in vector version (process two or more data elements in vector registers):

15% of VPU loads are used in vector version.
41% of VPU stores are used in vector version.
20% of VPU addition or subtraction instructions are used in vector version.
0% of VPU fused multiply-add instructions are used in vector version.
6% of VPU instructions that are not load, store, addition, subtraction nor multiply instructions are used in vector version.

Expensive FP math instructions/calls

Detected performance impact from expensive FP math instructions/calls. By removing/reexpressing them, you can lower the cost of an iteration from 12.50 to 1.50 cycles (8.33x speedup).

Matching between your function (in the source code) and the binary function

The binary function is composed of 5 FP arithmetical operations:

5: addition or subtraction

The binary function is loading 272 bytes. The binary function is storing 168 bytes.

Arithmetic intensity

Arithmetic intensity is 0.01 FP operations per loaded or stored byte.

General properties

nb instructions	79
loop length	316
nb stack references	0

Front-end

FIT IN UOP CACHE

front end

9.75 cycles

Back-end

	P0	P1	P2	P3	P4	P5	P6	P7	P8	P9	P10	P11	P12	P13	P14	P15	P16
uops	4.00	4.00	4.25	4.08	4.17	4.17	4.17	4.17	5.00	5.00	5.00	5.00	12.33	12.33	12.33	2.50	2.50
cycles	4.00	4.00	4.25	4.08	4.17	4.17	4.17	4.17	5.00	5.00	5.00	5.00	12.33	12.33	12.33	2.50	2.50

Execution ports to units layout:

P0: BRU
P1: BRU
P2: ALU
P3: ALU
P4: ALU
P5: ALU
P6: ALU
P7: ALU
P8 (128 bits): VPU, FP store data, ALU, DIV/SQRT
P9 (128 bits): VPU, ALU, FP store data
P10 (128 bits): VPU, ALU, DIV/SQRT
P11 (128 bits): ALU, VPU
P12 (256 bits): store address, load
P13 (256 bits): store address, load
P14 (256 bits): load
P15 (64 bits): store data
P16 (64 bits): store data

Cycles executing div or sqrt instructions

5.00-12.50

Cycles summary

Front-end	9.75
Overall L1	12.33-12.50

Vectorization ratios

INT

all	16%
load	15%
store	41%
mul	NA (no mul vectorizable/vectorized instructions)
add-sub	0%
fma	0%
other	0%

all	30%
load	NA (no load vectorizable/vectorized instructions)
store	NA (no store vectorizable/vectorized instructions)
mul	NA (no mul vectorizable/vectorized instructions)
add-sub	66%
fma	NA (no fma vectorizable/vectorized instructions)
div/sqrt	NA (no div/sqrt vectorizable/vectorized instructions)
other	14%

INT+FP

all	18%
load	15%
store	41%
mul	NA (no mul vectorizable/vectorized instructions)
add-sub	20%
fma	0%
div/sqrt	NA (no div/sqrt vectorizable/vectorized instructions)
other	6%

Cycles and memory resources usage

Assuming all data fit into the L1 cache, each call to the function takes 12.50 cycles. At this rate:

22% of peak load performance is reached (21.76 out of 96.00 bytes loaded per cycle (GB/s @ 1GHz))
28% of peak store performance is reached (13.44 out of 48.00 bytes stored per cycle (GB/s @ 1GHz))

ASM code

In the binary file, the address of the function is: 426620

Instruction	Nb FU	P0	P1	P2	P3	P4	P5	P6	P7	P8	P9	P10	P11	P12	P13	P14	P15	P16	Latency	Recip. throughput	Vectorization
STP X29, X30, [SP, #912]!	1	0	0	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0.50	0.50	0	0.50	0.50	1	0.50	scal (100.0%)
ADD X29, SP, #0	1	0	0	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	1	0.17	scal (50.0%)
STP X19, X20, [SP, #16]	1	0	0	0	0	0	0	0	0	0	0	0	0	0.50	0.50	0	0.50	0.50	1	0.50	scal (100.0%)
ORR X19, XZR, X0	1	0	0	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	1	0.17	N/A
STP X21, X22, [SP, #32]	1	0	0	0	0	0	0	0	0	0	0	0	0	0.50	0.50	0	0.50	0.50	1	0.50	scal (100.0%)
STP X23, X24, [SP, #48]	1	0	0	0	0	0	0	0	0	0	0	0	0	0.50	0.50	0	0.50	0.50	1	0.50	scal (100.0%)
STR D15, [SP, #72]	1	0	0	0	0	0	0	0	0	0.50	0.50	0	0	0.50	0.50	0	0	0	2	0.50	scal (50.0%)
LDP W21, W24, [X0, #48]	1	0	0	0	0	0	0	0	0	0	0	0	0	0.33	0.33	0.33	0	0	4	0.33	scal (50.0%)
LDP W0, W23, [X0, #56]	1	0	0	0	0	0	0	0	0	0	0	0	0	0.33	0.33	0.33	0	0	4	0.33	N/A
SUB W1, W21, W24	1	0	0	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	1	0.17	scal (25.0%)
ADD W2, W1, #1	1	0	0	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	1	0.17	scal (25.0%)
SUB W3, W0, W23	1	0	0	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	1	0.17	scal (25.0%)
ADD W20, W3, #1	1	0	0	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	1	0.17	scal (25.0%)
MADD W21, W3, W2, W2	1	0	0	0	0	0	0	1	0	0	0	0	0	0	0	0	0	0	2	1	scal (25.0%)
BL 403890 <@plt_start@+0x200>	1	0.50	0.50	0.50	0.50	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.50	N/A
ORR W22, WZR, W0	1	0	0	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	1	0.17	scal (25.0%)
BL 4038c0 <@plt_start@+0x230>	1	0.50	0.50	0.50	0.50	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.50	N/A
SDIV W4, W21, W22	1	0	0	0	0	0	0	1	0	0	0	0	0	0	0	0	0	0	5-12	5-12.50	N/A
MSUB W5, W4, W22, W21	1	0	0	0	0	0	0	1	0	0	0	0	0	0	0	0	0	0	2	1	scal (25.0%)
CMP W0, W5	1	0	0	0.25	0.25	0	0	0.25	0.25	0	0	0	0	0	0	0	0	0	1	0.33	scal (25.0%)
B.LT 426810 <_Z13field_summaryR16global_variablesR9parallel_._omp_fn.0+0x1f0>	1	0.50	0.50	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.50	N/A
MADD W5, W4, W0, W5	1	0	0	0	0	0	0	1	0	0	0	0	0	0	0	0	0	0	2	1	scal (25.0%)
ADD W0, W4, W5	1	0	0	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	1	0.17	N/A
CMP W5, W0	1	0	0	0.25	0.25	0	0	0.25	0.25	0	0	0	0	0	0	0	0	0	1	0.33	scal (25.0%)
B.GE 4267bc <_Z13field_summaryR16global_variablesR9parallel_._omp_fn.0+0x19c>	1	0.50	0.50	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.50	N/A
LDR X12, [X19]	1	0	0	0	0	0	0	0	0	0	0	0	0	0.33	0.33	0.33	0	0	4	0.33	N/A
MOVI D15, #0	1	0	0	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	2	0.25	scal (50.0%)
FMOV V21.2D, #0.2500000	1	0	0	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	2	0.25	vect (100.0%)
ADD W11, W24, #1	1	0	0	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	1	0.17	scal (25.0%)
ADD W21, W23, #1	1	0	0	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	1	0.17	scal (25.0%)
FMOV D19, #0.5000000	1	0	0	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	2	0.25	scal (50.0%)
SBFM X10, X23, #0, #31	1	0	0	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	1	0.17	scal (100.0%)
FMOV D22, D15	1	0	0	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	2	0.25	scal (50.0%)
FMOV D27, D15	1	0	0	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	2	0.25	scal (50.0%)
ORR X15, XZR, X12	1	0	0	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	1	0.17	N/A
FMOV D23, D15	1	0	0	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	2	0.25	scal (50.0%)
FMOV D24, D15	1	0	0	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	2	0.25	scal (50.0%)
LDR X30, [X12, #16]	1	0	0	0	0	0	0	0	0	0	0	0	0	0.33	0.33	0.33	0	0	4	0.33	scal (50.0%)
LDR X18, [X15], #48	1	0	0	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0.33	0.33	0.33	0	0	4	0.33	scal (50.0%)
LDR X17, [X12, #48]	1	0	0	0	0	0	0	0	0	0	0	0	0	0.33	0.33	0.33	0	0	4	0.33	scal (50.0%)
LDR X16, [X12, #96]	1	0	0	0	0	0	0	0	0	0	0	0	0	0.33	0.33	0.33	0	0	4	0.33	scal (50.0%)
LDR X15, [X15, #16]	1	0	0	0	0	0	0	0	0	0	0	0	0	0.33	0.33	0.33	0	0	4	0.33	N/A
LDR X14, [X12, #112]	1	0	0	0	0	0	0	0	0	0	0	0	0	0.33	0.33	0.33	0	0	4	0.33	scal (50.0%)
LDR X9, [X12, #168]	1	0	0	0	0	0	0	0	0	0	0	0	0	0.33	0.33	0.33	0	0	4	0.33	scal (50.0%)
LDR X8, [X12, #184]	1	0	0	0	0	0	0	0	0	0	0	0	0	0.33	0.33	0.33	0	0	4	0.33	scal (50.0%)
LDR X7, [X12, #216]	1	0	0	0	0	0	0	0	0	0	0	0	0	0.33	0.33	0.33	0	0	4	0.33	scal (50.0%)
LDR X6, [X12, #232]	1	0	0	0	0	0	0	0	0	0	0	0	0	0.33	0.33	0.33	0	0	4	0.33	scal (50.0%)
LDR X13, [X12, #656]	1	0	0	0	0	0	0	0	0	0	0	0	0	0.33	0.33	0.33	0	0	4	0.33	scal (50.0%)
LDR X12, [X12, #672]	1	0	0	0	0	0	0	0	0	0	0	0	0	0.33	0.33	0.33	0	0	4	0.33	N/A
STR X25, [SP, #64]	1	0	0	0	0	0	0	0	0	0	0	0	0	0.50	0.50	0	0.50	0.50	1	0.50	scal (50.0%)
LDR X25, [SP, #64]	1	0	0	0	0	0	0	0	0	0	0	0	0	0.33	0.33	0.33	0	0	4	0.33	scal (50.0%)
MOV V27.D[1], V22.D[0]	1	0	0	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	2	0.25	scal (50.0%)
STP D24, D23, [SP, #96]	1	0	0	0	0	0	0	0	0	0.50	0.50	0	0	0.50	0.50	0	0	0	2	0.50	vect (100.0%)
B 4267c8 <_Z13field_summaryR16global_variablesR9parallel_._omp_fn.0+0x1a8>	1	0.50	0.50	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.50	N/A
MOVI V27.2D, #0	1	0	0	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	2	0.25	scal (50.0%)
FMOV D15, D27	1	0	0	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	2	0.25	scal (50.0%)
STR Q27, [SP, #96]	1	0	0	0	0	0	0	0	0	0.50	0.50	0	0	0.50	0.50	0	0	0	2	0.50	vect (100.0%)
STR Q27, [SP, #80]	1	0	0	0	0	0	0	0	0	0.50	0.50	0	0	0.50	0.50	0	0	0	2	0.50	vect (100.0%)
BL 403c40 <@plt_start@+0x5b0>	1	0.50	0.50	0.50	0.50	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.50	N/A
LDP Q30, Q31, [SP, #80]	1	0	0	0	0	0	0	0	0	0	0	0	0	0.33	0.33	0.33	0	0	6	0.67	vect (100.0%)
LDUR Q18, [X19, #8]	1	0	0	0	0	0	0	0	0	0	0	0	0	0.33	0.33	0.33	0	0	6	0.33	vect (100.0%)
LDUR Q21, [X19, #24]	1	0	0	0	0	0	0	0	0	0	0	0	0	0.33	0.33	0.33	0	0	6	0.33	vect (100.0%)
LDR D27, [X19, #40]	1	0	0	0	0	0	0	0	0	0	0	0	0	0.33	0.33	0.33	0	0	6	0.33	scal (50.0%)
FADD V26.2D, V18.2D, V31.2D	1	0	0	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	2	0.25	vect (100.0%)
FADD V25.2D, V21.2D, V30.2D	1	0	0	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	2	0.25	vect (100.0%)
FADD D19, D27, D15	1	0	0	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	2	0.25	scal (50.0%)
LDR D15, [SP, #72]	1	0	0	0	0	0	0	0	0	0	0	0	0	0.33	0.33	0.33	0	0	6	0.33	scal (50.0%)
STUR Q26, [X19, #8]	1	0	0	0	0	0	0	0	0	0.50	0.50	0	0	0.50	0.50	0	0	0	2	0.50	vect (100.0%)
STUR Q25, [X19, #24]	1	0	0	0	0	0	0	0	0	0.50	0.50	0	0	0.50	0.50	0	0	0	2	0.50	vect (100.0%)
STR D19, [X19, #40]	1	0	0	0	0	0	0	0	0	0.50	0.50	0	0	0.50	0.50	0	0	0	2	0.50	scal (50.0%)
LDP X19, X20, [SP, #16]	1	0	0	0	0	0	0	0	0	0	0	0	0	0.33	0.33	0.33	0	0	4	0.50	N/A
LDP X21, X22, [SP, #32]	1	0	0	0	0	0	0	0	0	0	0	0	0	0.33	0.33	0.33	0	0	4	0.50	scal (100.0%)
LDP X23, X24, [SP, #48]	1	0	0	0	0	0	0	0	0	0	0	0	0	0.33	0.33	0.33	0	0	4	0.50	scal (100.0%)
LDP X29, X30, [SP], #112	1	0	0	0	0	0	0	0	0	0	0	0	0	0.33	0.33	0.33	0	0	4	0.50	scal (100.0%)
B 403790 <@plt_start@+0x100>	1	0.50	0.50	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.50	N/A
ADD W4, W4, #1	1	0	0	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	1	0.17	N/A
MOVZ W5, #0	1	0	0	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	1	0.17	scal (25.0%)
B 426674 <_Z13field_summaryR16global_variablesR9parallel_._omp_fn.0+0x54>	1	0.50	0.50	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.50	N/A
HINT #0																					N/A

Name	Coverage (%)	Time (s)
▼field_summary(global_variables&, parallel_&) [clone ._omp_fn.0]–	0.33	0.25
○Loop 312 - context.h:69-69 - exec	0.33	0.25

Report Configuration

Vectorization

Details

Expensive FP math instructions/calls

Matching between your function (in the source code) and the binary function

Arithmetic intensity

General properties

Front-end

Back-end

Cycles summary

Vectorization ratios

Cycles and memory resources usage

ASM code

Vectorization

Details

Expensive FP math instructions/calls

Matching between your function (in the source code) and the binary function

Arithmetic intensity

General properties

Front-end

Back-end

Cycles summary

Vectorization ratios

Cycles and memory resources usage

ASM code