OV - exec - Loop 153

	Loop Id: 153	Module: exec	Source: accelerate.cpp:43-53 [...]	Coverage: 7.25%

0x4291a0 LD1D	{Z20.D}, P7/Z, [X21, X0,LSL #3]    [9]

0x4291a4 LD1D	{Z2.D}, P7/Z, [X22, X0,LSL #3]    [11]

0x4291a8 LD1D	{Z3.D}, P7/Z, [X20, X0,LSL #3]    [7]

0x4291ac LD1D	{Z7.D}, P7/Z, [X15, X0,LSL #3]    [16]

0x4291b0 LD1D	{Z24.D}, P7/Z, [X13, X0,LSL #3]    [12]

0x4291b4 LD1D	{Z16.D}, P7/Z, [X16, X0,LSL #3]    [20]

0x4291b8 LD1D	{Z6.D}, P7/Z, [X14, X0,LSL #3]    [14]

0x4291bc LD1D	{Z4.D}, P7/Z, [X9, X0,LSL #3]    [5]

0x4291c0 LD1D	{Z28.D}, P7/Z, [X11, X0,LSL #3]    [8]

0x4291c4 LD1D	{Z0.D}, P7/Z, [X1, X0,LSL #3]    [21]

0x4291c8 LD1D	{Z29.D}, P7/Z, [X23, X0,LSL #3]    [13]

0x4291cc LD1D	{Z5.D}, P7/Z, [X5, X0,LSL #3]    [1]

0x4291d0 LD1D	{Z1.D}, P7/Z, [X6, X0,LSL #3]    [2]

0x4291d4 LD1D	{Z27.D}, P7/Z, [X8, X0,LSL #3]    [4]

0x4291d8 LD1D	{Z25.D}, P7/Z, [X19, X0,LSL #3]    [24]

0x4291dc FSUB	Z5.D, P7/M, Z5.D, Z4.D

0x4291e0 FSUB	Z27.D, P7/M, Z27.D, Z28.D

0x4291e4 FMUL	Z29.D, P7/M, Z29.D, Z20.D

0x4291e8 FMUL	Z1.D, P7/M, Z1.D, Z5.D

0x4291ec FMLA	Z29.D, P7/M, Z3.D, Z2.D

0x4291f0 FMLA	Z1.D, P7/M, Z27.D, Z0.D

0x4291f4 FMLA	Z29.D, P7/M, Z24.D, Z7.D

0x4291f8 FMLA	Z29.D, P7/M, Z6.D, Z16.D

0x4291fc FMUL	Z29.D, P7/M, Z29.D, Z30.D

0x429200 MOVPRFX	Z26, Z31

0x429204 FDIV	Z26.D, P7/M, Z26.D, Z29.D

0x429208 FMLS	Z25.D, P7/M, Z1.D, Z26.D

0x42920c ADD	X24, X18, X0,LSL #3

0x429210 ADD	X12, X30, X0,LSL #3

0x429214 ST1D	{Z25.D}, P7, [X24, MUL VL]    [15]

0x429218 LD1D	{Z22.D}, P7/Z, [X5, X0,LSL #3]    [1]

0x42921c LD1D	{Z23.D}, P7/Z, [X8, X0,LSL #3]    [4]

0x429220 LD1D	{Z18.D}, P7/Z, [X3, X0,LSL #3]    [17]

0x429224 LD1D	{Z19.D}, P7/Z, [X9, X0,LSL #3]    [5]

0x429228 LD1D	{Z20.D}, P7/Z, [X11, X0,LSL #3]    [8]

0x42922c LD1D	{Z21.D}, P7/Z, [X28, X0,LSL #3]    [23]

0x429230 LD1D	{Z17.D}, P7/Z, [X17, X0,LSL #3]    [22]

0x429234 FSUB	Z22.D, P7/M, Z22.D, Z23.D

0x429238 FSUB	Z19.D, P7/M, Z19.D, Z20.D

0x42923c FMUL	Z18.D, P7/M, Z18.D, Z22.D

0x429240 FMLA	Z18.D, P7/M, Z19.D, Z21.D

0x429244 FMLS	Z17.D, P7/M, Z18.D, Z26.D

0x429248 ST1D	{Z17.D}, P7, [X12, MUL VL]    [10]

0x42924c LD1D	{Z3.D}, P7/Z, [X6, X0,LSL #3]    [2]

0x429250 LD1D	{Z7.D}, P7/Z, [X4, X0,LSL #3]    [19]

0x429254 LD1D	{Z16.D}, P7/Z, [X25, X0,LSL #3]    [18]

0x429258 LD1D	{Z6.D}, P7/Z, [X1, X0,LSL #3]    [21]

0x42925c LD1D	{Z4.D}, P7/Z, [X7, X0,LSL #3]    [3]

0x429260 LD1D	{Z2.D}, P7/Z, [X24, MUL VL]    [15]

0x429264 FSUB	Z7.D, P7/M, Z7.D, Z16.D

0x429268 LD1D	{Z5.D}, P7/Z, [X10, X0,LSL #3]    [6]

0x42926c FMUL	Z3.D, P7/M, Z3.D, Z7.D

0x429270 FSUB	Z4.D, P7/M, Z4.D, Z5.D

0x429274 FMLA	Z3.D, P7/M, Z4.D, Z6.D

0x429278 FMLS	Z2.D, P7/M, Z3.D, Z26.D

0x42927c ST1D	{Z2.D}, P7, [X24, MUL VL]    [15]

0x429280 LD1D	{Z0.D}, P7/Z, [X4, X0,LSL #3]    [19]

0x429284 LD1D	{Z1.D}, P7/Z, [X7, X0,LSL #3]    [3]

0x429288 LD1D	{Z24.D}, P7/Z, [X3, X0,LSL #3]    [17]

0x42928c LD1D	{Z27.D}, P7/Z, [X25, X0,LSL #3]    [18]

0x429290 LD1D	{Z28.D}, P7/Z, [X10, X0,LSL #3]    [6]

0x429294 LD1D	{Z25.D}, P7/Z, [X28, X0,LSL #3]    [23]

0x429298 LD1D	{Z29.D}, P7/Z, [X12, MUL VL]    [10]

0x42929c FSUB	Z0.D, P7/M, Z0.D, Z1.D

0x4292a0 FSUB	Z27.D, P7/M, Z27.D, Z28.D

0x4292a4 FMUL	Z24.D, P7/M, Z24.D, Z0.D

0x4292a8 FMLA	Z24.D, P7/M, Z27.D, Z25.D

0x4292ac FMLS	Z29.D, P7/M, Z24.D, Z26.D

0x4292b0 ST1D	{Z29.D}, P7, [X12, MUL VL]    [10]

0x4292b4 ADD	X0, X0, X27

0x4292b8 WHILELO	P7.D, X0, X2

0x4292bc B.NE	4291a0

/home/eoseret/qaas/qaas_runs/178-219-7589/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]; }

/home/eoseret/qaas/qaas_runs/178-219-7589/intel/CloverLeaf2.0-CXX/build/CloverLeaf2.0-CXX/src/omp/accelerate.cpp: 43 - 53

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

43:       double stepbymass_s = halfdt / ((density0(i - 1, j - 1) * volume(i - 1, j - 1) + density0(i - 1, j + 0) * volume(i - 1, j + 0) +

44:                                        density0(i, j) * volume(i, j) + density0(i + 0, j - 1) * volume(i + 0, j - 1)) *

45:                                       0.25);

46:       xvel1(i, j) = xvel0(i, j) - stepbymass_s * (xarea(i, j) * (pressure(i, j) - pressure(i - 1, j + 0)) +

47:                                                   xarea(i + 0, j - 1) * (pressure(i + 0, j - 1) - pressure(i - 1, j - 1)));

48:       yvel1(i, j) = yvel0(i, j) - stepbymass_s * (yarea(i, j) * (pressure(i, j) - pressure(i + 0, j - 1)) +

49:                                                   yarea(i - 1, j + 0) * (pressure(i - 1, j + 0) - pressure(i - 1, j - 1)));

50:       xvel1(i, j) = xvel1(i, j) - stepbymass_s * (xarea(i, j) * (viscosity(i, j) - viscosity(i - 1, j + 0)) +

51:                                                   xarea(i + 0, j - 1) * (viscosity(i + 0, j - 1) - viscosity(i - 1, j - 1)));

52:       yvel1(i, j) = yvel1(i, j) - stepbymass_s * (yarea(i, j) * (viscosity(i, j) - viscosity(i + 0, j - 1)) +

53:                                                   yarea(i - 1, j + 0) * (viscosity(i - 1, j + 0) - viscosity(i - 1, j - 1)));

Coverage (%)	Name	Source Location	Module
►98.43+	omp_fulfill_event		libgomp.so.1.0.0
○	start_thread		libc.so.6
○	thread_start		libc.so.6
►1.57+	GOMP_parallel		libgomp.so.1.0.0
○	accelerate(global_variables&)	accelerate.cpp:66	exec
○	hydro(global_variables&, paral[...]	basic_string.h:1231	exec
○	main	clover_leaf.cpp:209	exec
○	__libc_start_call_main		libc.so.6
○	__libc_start_main		libc.so.6
○	_start	clover_leaf.cpp:51	exec

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 /

Metric	Value
CQA speedup if no scalar integer	1.00
CQA speedup if FP arith vectorized	1.00
CQA speedup if fully vectorized	1.00
CQA speedup if no inter-iteration dependency	NA
CQA speedup if next bottleneck killed	NA
Bottlenecks	P10, P11,
Function	accelerate_kernel(int, int, int, int, double, clover::Buffer2D&, clover::Buffer2D&, clover::Buffer2D&, clover::Buffer2D&, clover::Buffer2D&, clover::Buffer2D&, clover::Buffer2D&, clover::Buffer2D&, clover::Buffer2D&, clover::Buffer2D&) [clone ._omp_fn.0]
Source	context.h:69-69,accelerate.cpp:43-53
Source loop unroll info	not unrolled or unrolled with no peel/tail loop
Source loop unroll confidence level	max
Unroll/vectorization loop type	NA
Unroll factor	NA
CQA cycles	20.00
CQA cycles if no scalar integer	20.00
CQA cycles if FP arith vectorized	20.00
CQA cycles if fully vectorized	20.00
Front-end cycles	9.00
P0 cycles	0.50
P1 cycles	0.50
P2 cycles	1.00
P3 cycles	1.00
P4 cycles	1.00
P5 cycles	1.00
P6 cycles	13.50
P7 cycles	13.50
P8 cycles	12.50
P9 cycles	12.50
P10 cycles	20.00
P11 cycles	20.00
P12 cycles	0.00
P13 cycles	0.00
P14 cycles	0.00
DIV/SQRT cycles	6.99 - 14.08
Inter-iter dependencies cycles	1
FE+BE cycles (UFS)	NA
Stall cycles (UFS)	NA
Nb insns	72.00
Nb uops	72.00
Nb loads	NA
Nb stores	4.00
Nb stack references	0.00
FLOP/cycle	7.40
Nb FLOP add-sub	32.00
Nb FLOP mul	24.00
Nb FLOP fma	44.00
Nb FLOP div	4.00
Nb FLOP rcp	0.00
Nb FLOP sqrt	0.00
Nb FLOP rsqrt	0.00
Bytes/cycle	64.00
Bytes prefetched	0.00
Bytes loaded	1152.00
Bytes stored	128.00
Stride 0	0.00
Stride 1	0.00
Stride n	0.00
Stride unknown	24.00
Stride indirect	0.00
Vectorization ratio all	98.51
Vectorization ratio load	100.00
Vectorization ratio store	100.00
Vectorization ratio mul	100.00
Vectorization ratio add_sub	100.00
Vectorization ratio fma	100.00
Vectorization ratio div_sqrt	100.00
Vectorization ratio other	0.00
Vector-efficiency ratio all	100.00
Vector-efficiency ratio load	100.00
Vector-efficiency ratio store	100.00
Vector-efficiency ratio mul	100.00
Vector-efficiency ratio add_sub	100.00
Vector-efficiency ratio fma	100.00
Vector-efficiency ratio div_sqrt	100.00
Vector-efficiency ratio other	100.00

Metric	Value
CQA speedup if no scalar integer	1.00
CQA speedup if FP arith vectorized	1.00
CQA speedup if fully vectorized	1.00
CQA speedup if no inter-iteration dependency	NA
CQA speedup if next bottleneck killed	NA
Bottlenecks	P10, P11,
Function	accelerate_kernel(int, int, int, int, double, clover::Buffer2D&, clover::Buffer2D&, clover::Buffer2D&, clover::Buffer2D&, clover::Buffer2D&, clover::Buffer2D&, clover::Buffer2D&, clover::Buffer2D&, clover::Buffer2D&, clover::Buffer2D&) [clone ._omp_fn.0]
Source	context.h:69-69,accelerate.cpp:43-53
Source loop unroll info	not unrolled or unrolled with no peel/tail loop
Source loop unroll confidence level	max
Unroll/vectorization loop type	NA
Unroll factor	NA
CQA cycles	20.00
CQA cycles if no scalar integer	20.00
CQA cycles if FP arith vectorized	20.00
CQA cycles if fully vectorized	20.00
Front-end cycles	9.00
P0 cycles	0.50
P1 cycles	0.50
P2 cycles	1.00
P3 cycles	1.00
P4 cycles	1.00
P5 cycles	1.00
P6 cycles	13.50
P7 cycles	13.50
P8 cycles	12.50
P9 cycles	12.50
P10 cycles	20.00
P11 cycles	20.00
P12 cycles	0.00
P13 cycles	0.00
P14 cycles	0.00
DIV/SQRT cycles	6.99 - 14.08
Inter-iter dependencies cycles	1
FE+BE cycles (UFS)	NA
Stall cycles (UFS)	NA
Nb insns	72.00
Nb uops	72.00
Nb loads	NA
Nb stores	4.00
Nb stack references	0.00
FLOP/cycle	7.40
Nb FLOP add-sub	32.00
Nb FLOP mul	24.00
Nb FLOP fma	44.00
Nb FLOP div	4.00
Nb FLOP rcp	0.00
Nb FLOP sqrt	0.00
Nb FLOP rsqrt	0.00
Bytes/cycle	64.00
Bytes prefetched	0.00
Bytes loaded	1152.00
Bytes stored	128.00
Stride 0	0.00
Stride 1	0.00
Stride n	0.00
Stride unknown	24.00
Stride indirect	0.00
Vectorization ratio all	98.51
Vectorization ratio load	100.00
Vectorization ratio store	100.00
Vectorization ratio mul	100.00
Vectorization ratio add_sub	100.00
Vectorization ratio fma	100.00
Vectorization ratio div_sqrt	100.00
Vectorization ratio other	0.00
Vector-efficiency ratio all	100.00
Vector-efficiency ratio load	100.00
Vector-efficiency ratio store	100.00
Vector-efficiency ratio mul	100.00
Vector-efficiency ratio add_sub	100.00
Vector-efficiency ratio fma	100.00
Vector-efficiency ratio div_sqrt	100.00
Vector-efficiency ratio other	100.00

Path /

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

Function	accelerate_kernel(int, int, int, int, double, clover::Buffer2D&, clover::Buffer2D&, clover::Buffer2D&, clover::Buffer2D&, clover::Buffer2D&, clover::Buffer2D&, clover::Buffer2D&, clover::Buffer2D&, clover::Buffer2D&, clover::Buffer2D&) [clone ._omp_fn.0]
Source file and lines	accelerate.cpp:43-53
Module	exec

The loop is defined in:

/home/eoseret/qaas/qaas_runs/178-219-7589/intel/CloverLeaf2.0-CXX/build/CloverLeaf2.0-CXX/src/omp/context.h:69
/home/eoseret/qaas/qaas_runs/178-219-7589/intel/CloverLeaf2.0-CXX/build/CloverLeaf2.0-CXX/src/omp/accelerate.cpp:43-53

The related source loop is not unrolled or unrolled with no peel/tail loop.

gain
potential
hint
expert

Vectorization

Your loop is highly vectorized. 100% of vector register length is used (average across all VPU instructions).

Details

98% of VPU instructions are used in vector version (process two or more data elements in vector registers):

0% of VPU instructions that are not load, store, addition, subtraction nor multiply instructions are used in vector version.

FMA

Detected 44 FMA (fused multiply-add) operations. Presence of both ADD/SUB and MUL operations.

Workaround

Try to change order in which elements are evaluated (using parentheses) in arithmetic expressions containing both ADD/SUB and MUL operations to enable your compiler to generate FMA instructions wherever possible. For instance a + b*c is a valid FMA (MUL then ADD). However (a+b)* c cannot be translated into an FMA (ADD then MUL).

Slow data structures access

Detected data structures (typically arrays) that cannot be efficiently read/written

Details

Constant unknown stride: 24 occurrence(s)

Non-unit stride (uncontiguous) accesses are not efficiently using data caches

Workaround

Try to reorganize arrays of structures to structures of arrays
Consider to permute loops (see vectorization gain report)

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

The binary loop is composed of 148 FP arithmetical operations:

76: addition or subtraction (44 inside FMA instructions)
68: multiply (44 inside FMA instructions)
4: divide

The binary loop is loading 1152 bytes. The binary loop is storing 128 bytes.

Arithmetic intensity

Arithmetic intensity is 0.12 FP operations per loaded or stored byte.

General properties

nb instructions	72
nb uops	72
loop length	288
used w registers	0
used x registers	29
used b registers	0
used h registers	0
used s registers	0
used d registers	0
used q registers	0
used v registers	0
used z registers	24
nb stack references	0
ADD-SUB / MUL ratio	1.33

Front-end

MACRO FUSION NOT POSSIBLE FIT IN UOP CACHE

micro-operation queue	9.00 cycles
front end	9.00 cycles

Back-end

	P0	P1	P2	P3	P4	P5	P6	P7	P8	P9	P10	P11	P12	P13	P14
uops	0.50	0.50	1.00	1.00	1.00	1.00	13.50	13.50	2.00	2.00	20.00	20.00	0.00	0.00	0.00
cycles	0.50	0.50	1.00	1.00	1.00	1.00	13.50	13.50	12.50	12.50	20.00	20.00	0.00	0.00	0.00

Execution ports to units layout:

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

Cycles executing div or sqrt instructions	6.99-14.08
Longest recurrence chain latency (RecMII)	1.00

Cycles summary

Front-end	9.00
Dispatch	20.00
DIV/SQRT	6.99-14.08
Data deps.	1.00
Overall L1	20.00

Vectorization ratios

INT

all	97%
load	100%
store	100%
mul	NA (no mul vectorizable/vectorized instructions)
add-sub	NA (no add-sub vectorizable/vectorized instructions)
fma	NA (no fma vectorizable/vectorized instructions)
other	0%

all	100%
load	NA (no load vectorizable/vectorized instructions)
store	NA (no store vectorizable/vectorized instructions)
mul	100%
add-sub	100%
fma	100%
div/sqrt	100%
other	NA (no other vectorizable/vectorized instructions)

INT+FP

all	98%
load	100%
store	100%
mul	100%
add-sub	100%
fma	100%
div/sqrt	100%
other	0%

Vector efficiency ratios

INT

all	100%
load	100%
store	100%
mul	NA (no mul vectorizable/vectorized instructions)
add-sub	NA (no add-sub vectorizable/vectorized instructions)
fma	NA (no fma vectorizable/vectorized instructions)
other	100%

all	100%
load	NA (no load vectorizable/vectorized instructions)
store	NA (no store vectorizable/vectorized instructions)
mul	100%
add-sub	100%
fma	100%
div/sqrt	100%
other	NA (no other vectorizable/vectorized instructions)

INT+FP

all	100%
load	100%
store	100%
mul	100%
add-sub	100%
fma	100%
div/sqrt	100%
other	100%

Cycles and memory resources usage

Assuming all data fit into the L1 cache, each iteration of the binary loop takes 20.00 cycles. At this rate:

60% of peak load performance is reached (57.60 out of 96.00 bytes loaded per cycle (GB/s @ 1GHz))
13% of peak store performance is reached (6.40 out of 48.00 bytes stored per cycle (GB/s @ 1GHz))

Front-end bottlenecks

Found no such bottlenecks.

ASM code

In the binary file, the address of the loop is: 4291a0

Instruction	Nb FU	P0	P1	P2	P3	P4	P5	P6	P7	P8	P9	P10	P11	Latency	Recip. throughput	Vectorization
LD1D {Z20.D}, P7/Z, [X21, X0,LSL #3]	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	6	0.50	vect (100.0%)
LD1D {Z2.D}, P7/Z, [X22, X0,LSL #3]	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	6	0.50	vect (100.0%)
LD1D {Z3.D}, P7/Z, [X20, X0,LSL #3]	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	6	0.50	vect (100.0%)
LD1D {Z7.D}, P7/Z, [X15, X0,LSL #3]	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	6	0.50	vect (100.0%)
LD1D {Z24.D}, P7/Z, [X13, X0,LSL #3]	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	6	0.50	vect (100.0%)
LD1D {Z16.D}, P7/Z, [X16, X0,LSL #3]	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	6	0.50	vect (100.0%)
LD1D {Z6.D}, P7/Z, [X14, X0,LSL #3]	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	6	0.50	vect (100.0%)
LD1D {Z4.D}, P7/Z, [X9, X0,LSL #3]	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	6	0.50	vect (100.0%)
LD1D {Z28.D}, P7/Z, [X11, X0,LSL #3]	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	6	0.50	vect (100.0%)
LD1D {Z0.D}, P7/Z, [X1, X0,LSL #3]	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	6	0.50	vect (100.0%)
LD1D {Z29.D}, P7/Z, [X23, X0,LSL #3]	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	6	0.50	vect (100.0%)
LD1D {Z5.D}, P7/Z, [X5, X0,LSL #3]	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	6	0.50	vect (100.0%)
LD1D {Z1.D}, P7/Z, [X6, X0,LSL #3]	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	6	0.50	vect (100.0%)
LD1D {Z27.D}, P7/Z, [X8, X0,LSL #3]	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	6	0.50	vect (100.0%)
LD1D {Z25.D}, P7/Z, [X19, X0,LSL #3]	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	6	0.50	vect (100.0%)
FSUB Z5.D, P7/M, Z5.D, Z4.D	1	0	0	0	0	0	0	0.50	0.50	0	0	0	0	2	0.50	vect (100.0%)
FSUB Z27.D, P7/M, Z27.D, Z28.D	1	0	0	0	0	0	0	0.50	0.50	0	0	0	0	2	0.50	vect (100.0%)
FMUL Z29.D, P7/M, Z29.D, Z20.D	1	0	0	0	0	0	0	0.50	0.50	0	0	0	0	3	0.50	vect (100.0%)
FMUL Z1.D, P7/M, Z1.D, Z5.D	1	0	0	0	0	0	0	0.50	0.50	0	0	0	0	3	0.50	vect (100.0%)
FMLA Z29.D, P7/M, Z3.D, Z2.D	1	0	0	0	0	0	0	0.50	0.50	0	0	0	0	4	0.50	vect (100.0%)
FMLA Z1.D, P7/M, Z27.D, Z0.D	1	0	0	0	0	0	0	0.50	0.50	0	0	0	0	4	0.50	vect (100.0%)
FMLA Z29.D, P7/M, Z24.D, Z7.D	1	0	0	0	0	0	0	0.50	0.50	0	0	0	0	4	0.50	vect (100.0%)
FMLA Z29.D, P7/M, Z6.D, Z16.D	1	0	0	0	0	0	0	0.50	0.50	0	0	0	0	4	0.50	vect (100.0%)
FMUL Z29.D, P7/M, Z29.D, Z30.D	1	0	0	0	0	0	0	0.50	0.50	0	0	0	0	3	0.50	vect (100.0%)
MOVPRFX Z26, Z31	1	0	0	0	0	0	0	0.50	0.50	0	0	0	0	2	0.50	scal (100.0%)
FDIV Z26.D, P7/M, Z26.D, Z29.D	1	0	0	0	0	0	0	1	0	0	0	0	0	7-15	6.99-14.08	vect (100.0%)
FMLS Z25.D, P7/M, Z1.D, Z26.D	1	0	0	0	0	0	0	0.50	0.50	0	0	0	0	4	0.50	vect (100.0%)
ADD X24, X18, X0,LSL #3	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	1	0.25	N/A
ADD X12, X30, X0,LSL #3	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	1	0.25	N/A
ST1D {Z25.D}, P7, [X24, MUL VL]	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0.50	0.50	2	0.50	vect (100.0%)
LD1D {Z22.D}, P7/Z, [X5, X0,LSL #3]	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	6	0.50	vect (100.0%)
LD1D {Z23.D}, P7/Z, [X8, X0,LSL #3]	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	6	0.50	vect (100.0%)
LD1D {Z18.D}, P7/Z, [X3, X0,LSL #3]	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	6	0.50	vect (100.0%)
LD1D {Z19.D}, P7/Z, [X9, X0,LSL #3]	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	6	0.50	vect (100.0%)
LD1D {Z20.D}, P7/Z, [X11, X0,LSL #3]	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	6	0.50	vect (100.0%)
LD1D {Z21.D}, P7/Z, [X28, X0,LSL #3]	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	6	0.50	vect (100.0%)
LD1D {Z17.D}, P7/Z, [X17, X0,LSL #3]	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	6	0.50	vect (100.0%)
FSUB Z22.D, P7/M, Z22.D, Z23.D	1	0	0	0	0	0	0	0.50	0.50	0	0	0	0	2	0.50	vect (100.0%)
FSUB Z19.D, P7/M, Z19.D, Z20.D	1	0	0	0	0	0	0	0.50	0.50	0	0	0	0	2	0.50	vect (100.0%)
FMUL Z18.D, P7/M, Z18.D, Z22.D	1	0	0	0	0	0	0	0.50	0.50	0	0	0	0	3	0.50	vect (100.0%)
FMLA Z18.D, P7/M, Z19.D, Z21.D	1	0	0	0	0	0	0	0.50	0.50	0	0	0	0	4	0.50	vect (100.0%)
FMLS Z17.D, P7/M, Z18.D, Z26.D	1	0	0	0	0	0	0	0.50	0.50	0	0	0	0	4	0.50	vect (100.0%)
ST1D {Z17.D}, P7, [X12, MUL VL]	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0.50	0.50	2	0.50	vect (100.0%)
LD1D {Z3.D}, P7/Z, [X6, X0,LSL #3]	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	6	0.50	vect (100.0%)
LD1D {Z7.D}, P7/Z, [X4, X0,LSL #3]	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	6	0.50	vect (100.0%)
LD1D {Z16.D}, P7/Z, [X25, X0,LSL #3]	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	6	0.50	vect (100.0%)
LD1D {Z6.D}, P7/Z, [X1, X0,LSL #3]	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	6	0.50	vect (100.0%)
LD1D {Z4.D}, P7/Z, [X7, X0,LSL #3]	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	6	0.50	vect (100.0%)
LD1D {Z2.D}, P7/Z, [X24, MUL VL]	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	6	0.50	vect (100.0%)
FSUB Z7.D, P7/M, Z7.D, Z16.D	1	0	0	0	0	0	0	0.50	0.50	0	0	0	0	2	0.50	vect (100.0%)
LD1D {Z5.D}, P7/Z, [X10, X0,LSL #3]	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	6	0.50	vect (100.0%)
FMUL Z3.D, P7/M, Z3.D, Z7.D	1	0	0	0	0	0	0	0.50	0.50	0	0	0	0	3	0.50	vect (100.0%)
FSUB Z4.D, P7/M, Z4.D, Z5.D	1	0	0	0	0	0	0	0.50	0.50	0	0	0	0	2	0.50	vect (100.0%)
FMLA Z3.D, P7/M, Z4.D, Z6.D	1	0	0	0	0	0	0	0.50	0.50	0	0	0	0	4	0.50	vect (100.0%)
FMLS Z2.D, P7/M, Z3.D, Z26.D	1	0	0	0	0	0	0	0.50	0.50	0	0	0	0	4	0.50	vect (100.0%)
ST1D {Z2.D}, P7, [X24, MUL VL]	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0.50	0.50	2	0.50	vect (100.0%)
LD1D {Z0.D}, P7/Z, [X4, X0,LSL #3]	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	6	0.50	vect (100.0%)
LD1D {Z1.D}, P7/Z, [X7, X0,LSL #3]	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	6	0.50	vect (100.0%)
LD1D {Z24.D}, P7/Z, [X3, X0,LSL #3]	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	6	0.50	vect (100.0%)
LD1D {Z27.D}, P7/Z, [X25, X0,LSL #3]	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	6	0.50	vect (100.0%)
LD1D {Z28.D}, P7/Z, [X10, X0,LSL #3]	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	6	0.50	vect (100.0%)
LD1D {Z25.D}, P7/Z, [X28, X0,LSL #3]	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	6	0.50	vect (100.0%)
LD1D {Z29.D}, P7/Z, [X12, MUL VL]	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	6	0.50	vect (100.0%)
FSUB Z0.D, P7/M, Z0.D, Z1.D	1	0	0	0	0	0	0	0.50	0.50	0	0	0	0	2	0.50	vect (100.0%)
FSUB Z27.D, P7/M, Z27.D, Z28.D	1	0	0	0	0	0	0	0.50	0.50	0	0	0	0	2	0.50	vect (100.0%)
FMUL Z24.D, P7/M, Z24.D, Z0.D	1	0	0	0	0	0	0	0.50	0.50	0	0	0	0	3	0.50	vect (100.0%)
FMLA Z24.D, P7/M, Z27.D, Z25.D	1	0	0	0	0	0	0	0.50	0.50	0	0	0	0	4	0.50	vect (100.0%)
FMLS Z29.D, P7/M, Z24.D, Z26.D	1	0	0	0	0	0	0	0.50	0.50	0	0	0	0	4	0.50	vect (100.0%)
ST1D {Z29.D}, P7, [X12, MUL VL]	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0.50	0.50	2	0.50	vect (100.0%)
ADD X0, X0, X27	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	1	0.25	N/A
WHILELO P7.D, X0, X2	1	0	0	0	0	1	0	0	0	0	0	0	0	3	2	N/A
B.NE 4291a0 <_Z17accelerate_kerneliiiidRN6clover8Buffer2DIdEES2_S2_S2_S2_S2_S2_S2_S2_S2_._omp_fn.0+0x2c0>	1	0.50	0.50	0	0	0	0	0	0	0	0	0	0	1	0.50	N/A

Function	accelerate_kernel(int, int, int, int, double, clover::Buffer2D&, clover::Buffer2D&, clover::Buffer2D&, clover::Buffer2D&, clover::Buffer2D&, clover::Buffer2D&, clover::Buffer2D&, clover::Buffer2D&, clover::Buffer2D&, clover::Buffer2D&) [clone ._omp_fn.0]
Source file and lines	accelerate.cpp:43-53
Module	exec

The loop is defined in:

/home/eoseret/qaas/qaas_runs/178-219-7589/intel/CloverLeaf2.0-CXX/build/CloverLeaf2.0-CXX/src/omp/context.h:69
/home/eoseret/qaas/qaas_runs/178-219-7589/intel/CloverLeaf2.0-CXX/build/CloverLeaf2.0-CXX/src/omp/accelerate.cpp:43-53

The related source loop is not unrolled or unrolled with no peel/tail loop.

gain
potential
hint
expert

Vectorization

Your loop is highly vectorized. 100% of vector register length is used (average across all VPU instructions).

Details

98% of VPU instructions are used in vector version (process two or more data elements in vector registers):

0% of VPU instructions that are not load, store, addition, subtraction nor multiply instructions are used in vector version.

FMA

Detected 44 FMA (fused multiply-add) operations. Presence of both ADD/SUB and MUL operations.

Workaround

Slow data structures access

Detected data structures (typically arrays) that cannot be efficiently read/written

Details

Constant unknown stride: 24 occurrence(s)

Non-unit stride (uncontiguous) accesses are not efficiently using data caches

Workaround

Try to reorganize arrays of structures to structures of arrays
Consider to permute loops (see vectorization gain report)

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

The binary loop is composed of 148 FP arithmetical operations:

76: addition or subtraction (44 inside FMA instructions)
68: multiply (44 inside FMA instructions)
4: divide

The binary loop is loading 1152 bytes. The binary loop is storing 128 bytes.

Arithmetic intensity

Arithmetic intensity is 0.12 FP operations per loaded or stored byte.

General properties

nb instructions	72
nb uops	72
loop length	288
used w registers	0
used x registers	29
used b registers	0
used h registers	0
used s registers	0
used d registers	0
used q registers	0
used v registers	0
used z registers	24
nb stack references	0
ADD-SUB / MUL ratio	1.33

Front-end

MACRO FUSION NOT POSSIBLE FIT IN UOP CACHE

micro-operation queue	9.00 cycles
front end	9.00 cycles

Back-end

	P0	P1	P2	P3	P4	P5	P6	P7	P8	P9	P10	P11	P12	P13	P14
uops	0.50	0.50	1.00	1.00	1.00	1.00	13.50	13.50	2.00	2.00	20.00	20.00	0.00	0.00	0.00
cycles	0.50	0.50	1.00	1.00	1.00	1.00	13.50	13.50	12.50	12.50	20.00	20.00	0.00	0.00	0.00

Execution ports to units layout:

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

Cycles executing div or sqrt instructions	6.99-14.08
Longest recurrence chain latency (RecMII)	1.00

Cycles summary

Front-end	9.00
Dispatch	20.00
DIV/SQRT	6.99-14.08
Data deps.	1.00
Overall L1	20.00

Vectorization ratios

INT

all	97%
load	100%
store	100%
mul	NA (no mul vectorizable/vectorized instructions)
add-sub	NA (no add-sub vectorizable/vectorized instructions)
fma	NA (no fma vectorizable/vectorized instructions)
other	0%

all	100%
load	NA (no load vectorizable/vectorized instructions)
store	NA (no store vectorizable/vectorized instructions)
mul	100%
add-sub	100%
fma	100%
div/sqrt	100%
other	NA (no other vectorizable/vectorized instructions)

INT+FP

all	98%
load	100%
store	100%
mul	100%
add-sub	100%
fma	100%
div/sqrt	100%
other	0%

Vector efficiency ratios

INT

all	100%
load	100%
store	100%
mul	NA (no mul vectorizable/vectorized instructions)
add-sub	NA (no add-sub vectorizable/vectorized instructions)
fma	NA (no fma vectorizable/vectorized instructions)
other	100%

all	100%
load	NA (no load vectorizable/vectorized instructions)
store	NA (no store vectorizable/vectorized instructions)
mul	100%
add-sub	100%
fma	100%
div/sqrt	100%
other	NA (no other vectorizable/vectorized instructions)

INT+FP

all	100%
load	100%
store	100%
mul	100%
add-sub	100%
fma	100%
div/sqrt	100%
other	100%

Cycles and memory resources usage

Assuming all data fit into the L1 cache, each iteration of the binary loop takes 20.00 cycles. At this rate:

60% of peak load performance is reached (57.60 out of 96.00 bytes loaded per cycle (GB/s @ 1GHz))
13% of peak store performance is reached (6.40 out of 48.00 bytes stored per cycle (GB/s @ 1GHz))

Front-end bottlenecks

Found no such bottlenecks.

ASM code

In the binary file, the address of the loop is: 4291a0

Instruction	Nb FU	P0	P1	P2	P3	P4	P5	P6	P7	P8	P9	P10	P11	Latency	Recip. throughput	Vectorization
LD1D {Z20.D}, P7/Z, [X21, X0,LSL #3]	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	6	0.50	vect (100.0%)
LD1D {Z2.D}, P7/Z, [X22, X0,LSL #3]	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	6	0.50	vect (100.0%)
LD1D {Z3.D}, P7/Z, [X20, X0,LSL #3]	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	6	0.50	vect (100.0%)
LD1D {Z7.D}, P7/Z, [X15, X0,LSL #3]	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	6	0.50	vect (100.0%)
LD1D {Z24.D}, P7/Z, [X13, X0,LSL #3]	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	6	0.50	vect (100.0%)
LD1D {Z16.D}, P7/Z, [X16, X0,LSL #3]	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	6	0.50	vect (100.0%)
LD1D {Z6.D}, P7/Z, [X14, X0,LSL #3]	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	6	0.50	vect (100.0%)
LD1D {Z4.D}, P7/Z, [X9, X0,LSL #3]	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	6	0.50	vect (100.0%)
LD1D {Z28.D}, P7/Z, [X11, X0,LSL #3]	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	6	0.50	vect (100.0%)
LD1D {Z0.D}, P7/Z, [X1, X0,LSL #3]	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	6	0.50	vect (100.0%)
LD1D {Z29.D}, P7/Z, [X23, X0,LSL #3]	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	6	0.50	vect (100.0%)
LD1D {Z5.D}, P7/Z, [X5, X0,LSL #3]	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	6	0.50	vect (100.0%)
LD1D {Z1.D}, P7/Z, [X6, X0,LSL #3]	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	6	0.50	vect (100.0%)
LD1D {Z27.D}, P7/Z, [X8, X0,LSL #3]	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	6	0.50	vect (100.0%)
LD1D {Z25.D}, P7/Z, [X19, X0,LSL #3]	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	6	0.50	vect (100.0%)
FSUB Z5.D, P7/M, Z5.D, Z4.D	1	0	0	0	0	0	0	0.50	0.50	0	0	0	0	2	0.50	vect (100.0%)
FSUB Z27.D, P7/M, Z27.D, Z28.D	1	0	0	0	0	0	0	0.50	0.50	0	0	0	0	2	0.50	vect (100.0%)
FMUL Z29.D, P7/M, Z29.D, Z20.D	1	0	0	0	0	0	0	0.50	0.50	0	0	0	0	3	0.50	vect (100.0%)
FMUL Z1.D, P7/M, Z1.D, Z5.D	1	0	0	0	0	0	0	0.50	0.50	0	0	0	0	3	0.50	vect (100.0%)
FMLA Z29.D, P7/M, Z3.D, Z2.D	1	0	0	0	0	0	0	0.50	0.50	0	0	0	0	4	0.50	vect (100.0%)
FMLA Z1.D, P7/M, Z27.D, Z0.D	1	0	0	0	0	0	0	0.50	0.50	0	0	0	0	4	0.50	vect (100.0%)
FMLA Z29.D, P7/M, Z24.D, Z7.D	1	0	0	0	0	0	0	0.50	0.50	0	0	0	0	4	0.50	vect (100.0%)
FMLA Z29.D, P7/M, Z6.D, Z16.D	1	0	0	0	0	0	0	0.50	0.50	0	0	0	0	4	0.50	vect (100.0%)
FMUL Z29.D, P7/M, Z29.D, Z30.D	1	0	0	0	0	0	0	0.50	0.50	0	0	0	0	3	0.50	vect (100.0%)
MOVPRFX Z26, Z31	1	0	0	0	0	0	0	0.50	0.50	0	0	0	0	2	0.50	scal (100.0%)
FDIV Z26.D, P7/M, Z26.D, Z29.D	1	0	0	0	0	0	0	1	0	0	0	0	0	7-15	6.99-14.08	vect (100.0%)
FMLS Z25.D, P7/M, Z1.D, Z26.D	1	0	0	0	0	0	0	0.50	0.50	0	0	0	0	4	0.50	vect (100.0%)
ADD X24, X18, X0,LSL #3	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	1	0.25	N/A
ADD X12, X30, X0,LSL #3	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	1	0.25	N/A
ST1D {Z25.D}, P7, [X24, MUL VL]	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0.50	0.50	2	0.50	vect (100.0%)
LD1D {Z22.D}, P7/Z, [X5, X0,LSL #3]	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	6	0.50	vect (100.0%)
LD1D {Z23.D}, P7/Z, [X8, X0,LSL #3]	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	6	0.50	vect (100.0%)
LD1D {Z18.D}, P7/Z, [X3, X0,LSL #3]	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	6	0.50	vect (100.0%)
LD1D {Z19.D}, P7/Z, [X9, X0,LSL #3]	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	6	0.50	vect (100.0%)
LD1D {Z20.D}, P7/Z, [X11, X0,LSL #3]	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	6	0.50	vect (100.0%)
LD1D {Z21.D}, P7/Z, [X28, X0,LSL #3]	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	6	0.50	vect (100.0%)
LD1D {Z17.D}, P7/Z, [X17, X0,LSL #3]	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	6	0.50	vect (100.0%)
FSUB Z22.D, P7/M, Z22.D, Z23.D	1	0	0	0	0	0	0	0.50	0.50	0	0	0	0	2	0.50	vect (100.0%)
FSUB Z19.D, P7/M, Z19.D, Z20.D	1	0	0	0	0	0	0	0.50	0.50	0	0	0	0	2	0.50	vect (100.0%)
FMUL Z18.D, P7/M, Z18.D, Z22.D	1	0	0	0	0	0	0	0.50	0.50	0	0	0	0	3	0.50	vect (100.0%)
FMLA Z18.D, P7/M, Z19.D, Z21.D	1	0	0	0	0	0	0	0.50	0.50	0	0	0	0	4	0.50	vect (100.0%)
FMLS Z17.D, P7/M, Z18.D, Z26.D	1	0	0	0	0	0	0	0.50	0.50	0	0	0	0	4	0.50	vect (100.0%)
ST1D {Z17.D}, P7, [X12, MUL VL]	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0.50	0.50	2	0.50	vect (100.0%)
LD1D {Z3.D}, P7/Z, [X6, X0,LSL #3]	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	6	0.50	vect (100.0%)
LD1D {Z7.D}, P7/Z, [X4, X0,LSL #3]	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	6	0.50	vect (100.0%)
LD1D {Z16.D}, P7/Z, [X25, X0,LSL #3]	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	6	0.50	vect (100.0%)
LD1D {Z6.D}, P7/Z, [X1, X0,LSL #3]	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	6	0.50	vect (100.0%)
LD1D {Z4.D}, P7/Z, [X7, X0,LSL #3]	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	6	0.50	vect (100.0%)
LD1D {Z2.D}, P7/Z, [X24, MUL VL]	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	6	0.50	vect (100.0%)
FSUB Z7.D, P7/M, Z7.D, Z16.D	1	0	0	0	0	0	0	0.50	0.50	0	0	0	0	2	0.50	vect (100.0%)
LD1D {Z5.D}, P7/Z, [X10, X0,LSL #3]	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	6	0.50	vect (100.0%)
FMUL Z3.D, P7/M, Z3.D, Z7.D	1	0	0	0	0	0	0	0.50	0.50	0	0	0	0	3	0.50	vect (100.0%)
FSUB Z4.D, P7/M, Z4.D, Z5.D	1	0	0	0	0	0	0	0.50	0.50	0	0	0	0	2	0.50	vect (100.0%)
FMLA Z3.D, P7/M, Z4.D, Z6.D	1	0	0	0	0	0	0	0.50	0.50	0	0	0	0	4	0.50	vect (100.0%)
FMLS Z2.D, P7/M, Z3.D, Z26.D	1	0	0	0	0	0	0	0.50	0.50	0	0	0	0	4	0.50	vect (100.0%)
ST1D {Z2.D}, P7, [X24, MUL VL]	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0.50	0.50	2	0.50	vect (100.0%)
LD1D {Z0.D}, P7/Z, [X4, X0,LSL #3]	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	6	0.50	vect (100.0%)
LD1D {Z1.D}, P7/Z, [X7, X0,LSL #3]	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	6	0.50	vect (100.0%)
LD1D {Z24.D}, P7/Z, [X3, X0,LSL #3]	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	6	0.50	vect (100.0%)
LD1D {Z27.D}, P7/Z, [X25, X0,LSL #3]	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	6	0.50	vect (100.0%)
LD1D {Z28.D}, P7/Z, [X10, X0,LSL #3]	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	6	0.50	vect (100.0%)
LD1D {Z25.D}, P7/Z, [X28, X0,LSL #3]	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	6	0.50	vect (100.0%)
LD1D {Z29.D}, P7/Z, [X12, MUL VL]	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	6	0.50	vect (100.0%)
FSUB Z0.D, P7/M, Z0.D, Z1.D	1	0	0	0	0	0	0	0.50	0.50	0	0	0	0	2	0.50	vect (100.0%)
FSUB Z27.D, P7/M, Z27.D, Z28.D	1	0	0	0	0	0	0	0.50	0.50	0	0	0	0	2	0.50	vect (100.0%)
FMUL Z24.D, P7/M, Z24.D, Z0.D	1	0	0	0	0	0	0	0.50	0.50	0	0	0	0	3	0.50	vect (100.0%)
FMLA Z24.D, P7/M, Z27.D, Z25.D	1	0	0	0	0	0	0	0.50	0.50	0	0	0	0	4	0.50	vect (100.0%)
FMLS Z29.D, P7/M, Z24.D, Z26.D	1	0	0	0	0	0	0	0.50	0.50	0	0	0	0	4	0.50	vect (100.0%)
ST1D {Z29.D}, P7, [X12, MUL VL]	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0.50	0.50	2	0.50	vect (100.0%)
ADD X0, X0, X27	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	1	0.25	N/A
WHILELO P7.D, X0, X2	1	0	0	0	0	1	0	0	0	0	0	0	0	3	2	N/A
B.NE 4291a0 <_Z17accelerate_kerneliiiidRN6clover8Buffer2DIdEES2_S2_S2_S2_S2_S2_S2_S2_S2_._omp_fn.0+0x2c0>	1	0.50	0.50	0	0	0	0	0	0	0	0	0	0	1	0.50	N/A

Report Configuration

Vectorization

Details

FMA

Workaround

Slow data structures access

Details

Workaround

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

Arithmetic intensity

General properties

Front-end

Back-end

Cycles summary

Vectorization ratios

Vector efficiency ratios

Cycles and memory resources usage

Front-end bottlenecks

ASM code

Vectorization

Details

FMA

Workaround

Slow data structures access

Details

Workaround

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

Arithmetic intensity

General properties

Front-end

Back-end

Cycles summary

Vectorization ratios

Vector efficiency ratios

Cycles and memory resources usage

Front-end bottlenecks

ASM code