OV - exec - Loop 295

	Loop Id: 295	Module: exec	Source: BsplineFunctor.h:236-241	Coverage: 1.35%

0x42c0cc LDR	D7, [X0]    [3]

0x42c0d0 FCMPE	D31, D7

0x42c0d4 B.LS	42c0e8

0x42c0d8 CMP	W24, W30

0x42c0dc B.EQ	42c0e8

0x42c0e0 STR	D7, [X4, W2,UXTW #3]    [1]

0x42c0e4 ADD	W2, W2, #1

0x42c0e8 LDR	D8, [X0, #8]    [3]

0x42c0ec ADD	W28, W30, #1

0x42c0f0 ADD	X0, X0, #8

0x42c0f4 FCMPE	D31, D8

0x42c0f8 B.LS	42c10c

0x42c0fc CMP	W24, W28

0x42c100 B.EQ	42c10c

0x42c104 STR	D8, [X4, W2,UXTW #3]    [1]

0x42c108 ADD	W2, W2, #1

0x42c10c LDR	D9, [X0, #8]    [2]

0x42c110 ADD	W1, W28, #1

0x42c114 FCMPE	D31, D9

0x42c118 B.LS	42c12c

0x42c11c CMP	W24, W1

0x42c120 B.EQ	42c12c

0x42c124 STR	D9, [X4, W2,UXTW #3]    [1]

0x42c128 ADD	W2, W2, #1

0x42c12c LDR	D10, [X0, #16]    [2]

0x42c130 ADD	W27, W28, #2

0x42c134 FCMPE	D31, D10

0x42c138 B.LS	42c14c

0x42c13c CMP	W24, W27

0x42c140 B.EQ	42c14c

0x42c144 STR	D10, [X4, W2,UXTW #3]    [1]

0x42c148 ADD	W2, W2, #1

0x42c14c LDR	D11, [X0, #24]    [2]

0x42c150 ADD	W5, W28, #3

0x42c154 FCMPE	D31, D11

0x42c158 B.LS	42c16c

0x42c15c CMP	W24, W5

0x42c160 B.EQ	42c16c

0x42c164 STR	D11, [X4, W2,UXTW #3]    [1]

0x42c168 ADD	W2, W2, #1

0x42c16c LDR	D12, [X0, #32]    [2]

0x42c170 ADD	W9, W28, #4

0x42c174 FCMPE	D31, D12

0x42c178 B.LS	42c18c

0x42c17c CMP	W24, W9

0x42c180 B.EQ	42c18c

0x42c184 STR	D12, [X4, W2,UXTW #3]    [1]

0x42c188 ADD	W2, W2, #1

0x42c18c LDR	D13, [X0, #40]    [2]

0x42c190 ADD	W10, W28, #5

0x42c194 FCMPE	D31, D13

0x42c198 B.LS	42c1ac

0x42c19c CMP	W24, W10

0x42c1a0 B.EQ	42c1ac

0x42c1a4 STR	D13, [X4, W2,UXTW #3]    [1]

0x42c1a8 ADD	W2, W2, #1

0x42c1ac LDR	D14, [X0, #48]    [2]

0x42c1b0 ADD	W17, W28, #6

0x42c1b4 FCMPE	D31, D14

0x42c1b8 B.LS	42c1cc

0x42c1bc CMP	W24, W17

0x42c1c0 B.EQ	42c1cc

0x42c1c4 STR	D14, [X4, W2,UXTW #3]    [1]

0x42c1c8 ADD	W2, W2, #1

0x42c1cc ADD	W30, W28, #7

0x42c1d0 ADD	X0, X0, #56

0x42c1d4 CMP	W18, W30

0x42c1d8 B.NE	42c0cc

/home/eoseret/qaas/qaas_runs/178-212-9071/intel/miniqmc/build/miniqmc/src/QMCWaveFunctions/Jastrow/BsplineFunctor.h: 236 - 241

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

236:   for (int jat = 0; jat < iLimit; jat++)

237:   {

238:     real_type r = distArray[jat];

239:     // pick the distances smaller than the cutoff and avoid the reference atom

240:     if (r < cutoff_radius && iStart + jat != iat)

241:       distArrayCompressed[iCount++] = distArray[jat];

Coverage (%)	Name	Source Location	Module
►98.40+	qmcplusplus::WaveFunction::eva[...]	stl_vector.h:993	exec
○	main._omp_fn.1	NonLocalPP.hpp:126	exec
○	omp_fulfill_event		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 /

Metric	Value
CQA speedup if no scalar integer	1.59
CQA speedup if FP arith vectorized	1.00
CQA speedup if fully vectorized	4.25
CQA speedup if no inter-iteration dependency	NA
CQA speedup if next bottleneck killed	1.06
Bottlenecks	micro-operation queue, P0, P1,
Function	miniqmcreference::TwoBodyJastrowRef >::evaluateRatios(qmcplusplus::VirtualParticleSet&, std::vector >&)
Source	BsplineFunctor.h:236-241
Source loop unroll info	not unrolled or unrolled with no peel/tail loop
Source loop unroll confidence level	NA
Unroll/vectorization loop type	NA
Unroll factor	NA
CQA cycles	8.50
CQA cycles if no scalar integer	5.33
CQA cycles if FP arith vectorized	8.50
CQA cycles if fully vectorized	2.00
Front-end cycles	8.50
P0 cycles	8.50
P1 cycles	8.50
P2 cycles	6.75
P3 cycles	6.75
P4 cycles	6.75
P5 cycles	6.75
P6 cycles	8.00
P7 cycles	8.00
P8 cycles	0.00
P9 cycles	0.00
P10 cycles	5.33
P11 cycles	5.33
P12 cycles	5.33
P13 cycles	0.00
P14 cycles	0.00
DIV/SQRT cycles	0.00
Inter-iter dependencies cycles	NA
FE+BE cycles (UFS)	NA
Stall cycles (UFS)	NA
Nb insns	68.00
Nb uops	68.00
Nb loads	NA
Nb stores	8.00
Nb stack references	0.00
FLOP/cycle	0.00
Nb FLOP add-sub	0.00
Nb FLOP mul	0.00
Nb FLOP fma	0.00
Nb FLOP div	0.00
Nb FLOP rcp	0.00
Nb FLOP sqrt	0.00
Nb FLOP rsqrt	0.00
Bytes/cycle	0.00
Bytes prefetched	0.00
Bytes loaded	0.00
Bytes stored	0.00
Stride 0	NA
Stride 1	NA
Stride n	NA
Stride unknown	NA
Stride indirect	NA
Vectorization ratio all	0.00
Vectorization ratio load	0.00
Vectorization ratio store	0.00
Vectorization ratio mul	NA
Vectorization ratio add_sub	0.00
Vectorization ratio fma	NA
Vectorization ratio div_sqrt	NA
Vectorization ratio other	0.00
Vector-efficiency ratio all	20.19
Vector-efficiency ratio load	25.00
Vector-efficiency ratio store	25.00
Vector-efficiency ratio mul	NA
Vector-efficiency ratio add_sub	12.50
Vector-efficiency ratio fma	NA
Vector-efficiency ratio div_sqrt	NA
Vector-efficiency ratio other	18.75

Metric	Value
CQA speedup if no scalar integer	1.59
CQA speedup if FP arith vectorized	1.00
CQA speedup if fully vectorized	4.25
CQA speedup if no inter-iteration dependency	NA
CQA speedup if next bottleneck killed	1.06
Bottlenecks	micro-operation queue, P0, P1,
Function	miniqmcreference::TwoBodyJastrowRef >::evaluateRatios(qmcplusplus::VirtualParticleSet&, std::vector >&)
Source	BsplineFunctor.h:236-241
Source loop unroll info	not unrolled or unrolled with no peel/tail loop
Source loop unroll confidence level	NA
Unroll/vectorization loop type	NA
Unroll factor	NA
CQA cycles	8.50
CQA cycles if no scalar integer	5.33
CQA cycles if FP arith vectorized	8.50
CQA cycles if fully vectorized	2.00
Front-end cycles	8.50
P0 cycles	8.50
P1 cycles	8.50
P2 cycles	6.75
P3 cycles	6.75
P4 cycles	6.75
P5 cycles	6.75
P6 cycles	8.00
P7 cycles	8.00
P8 cycles	0.00
P9 cycles	0.00
P10 cycles	5.33
P11 cycles	5.33
P12 cycles	5.33
P13 cycles	0.00
P14 cycles	0.00
DIV/SQRT cycles	0.00
Inter-iter dependencies cycles	NA
FE+BE cycles (UFS)	NA
Stall cycles (UFS)	NA
Nb insns	68.00
Nb uops	68.00
Nb loads	NA
Nb stores	8.00
Nb stack references	0.00
FLOP/cycle	0.00
Nb FLOP add-sub	0.00
Nb FLOP mul	0.00
Nb FLOP fma	0.00
Nb FLOP div	0.00
Nb FLOP rcp	0.00
Nb FLOP sqrt	0.00
Nb FLOP rsqrt	0.00
Bytes/cycle	0.00
Bytes prefetched	0.00
Bytes loaded	0.00
Bytes stored	0.00
Stride 0	NA
Stride 1	NA
Stride n	NA
Stride unknown	NA
Stride indirect	NA
Vectorization ratio all	0.00
Vectorization ratio load	0.00
Vectorization ratio store	0.00
Vectorization ratio mul	NA
Vectorization ratio add_sub	0.00
Vectorization ratio fma	NA
Vectorization ratio div_sqrt	NA
Vectorization ratio other	0.00
Vector-efficiency ratio all	20.19
Vector-efficiency ratio load	25.00
Vector-efficiency ratio store	25.00
Vector-efficiency ratio mul	NA
Vector-efficiency ratio add_sub	12.50
Vector-efficiency ratio fma	NA
Vector-efficiency ratio div_sqrt	NA
Vector-efficiency ratio other	18.75

Path /

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

Function	miniqmcreference::TwoBodyJastrowRef >::evaluateRatios(qmcplusplus::VirtualParticleSet&, std::vector >&)
Source file and lines	BsplineFunctor.h:236-241
Module	exec

The loop is defined in /home/eoseret/qaas/qaas_runs/178-212-9071/intel/miniqmc/build/miniqmc/src/QMCWaveFunctions/Jastrow/BsplineFunctor.h:236-241.

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

Ignoring paths for analysis
Too many paths. If you really need to analyze all of the 6561 paths individually, rerun with max-paths=6561
RecMII not computed since number of paths is unknown or > max_paths
Streams not analyzed since number of paths is unknown or > max_paths

Try to simplify control and/or increase the maximum number of paths per function/loop through the 'max-paths-nb' option.

This loop has 6561 execution paths.

The presence of multiple execution paths is typically the main/first bottleneck.
Try to simplify control inside loop: ideally, try to remove all conditional expressions, for example by (if applicable):

hoisting them (moving them outside the loop)
turning them into conditional moves, MIN or MAX

Ex: if (x<0) x=0 => x = (x<0 ? 0 : x) (or MAX(0,x) after defining the corresponding macro)

gain
potential
hint
expert

Code clean check

Detected a slowdown caused by scalar integer instructions (typically used for address computation). By removing them, you can lower the cost of an iteration from 8.50 to 5.33 cycles (1.59x speedup).

Workaround

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

Vectorization

Your loop is not vectorized. Only 20% of vector register length is used (average across all VPU instructions). By vectorizing your loop, you can lower the cost of an iteration from 8.50 to 2.00 cycles (4.25x speedup).

Details

All VPU instructions are used in scalar version (process only one data element in vector registers). Since your execution units are vector units, only a vectorized loop can use their full power.

Workaround

Try another compiler or update/tune your current one
Remove inter-iterations dependences from your loop and make it unit-stride:
- If your arrays have 2 or more dimensions, check whether elements are accessed contiguously and, otherwise, try to permute loops accordingly: C storage order is row-major: for(i) for(j) a[j][i] = b[j][i]; (slow, non stride 1) => for(i) for(j) a[i][j] = b[i][j]; (fast, stride 1)
- If your loop streams arrays of structures (AoS), try to use structures of arrays instead (SoA): for(i) a[i].x = b[i].x; (slow, non stride 1) => for(i) a.x[i] = b.x[i]; (fast, stride 1)

No data for this section

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

The binary loop does not contain any FP arithmetical operations. The binary loop does not load or store any data.

General properties

nb instructions	68
nb uops	68
loop length	272
used w registers	11
used x registers	2
used b registers	0
used h registers	0
used s registers	0
used d registers	9
used q registers	0
used v registers	0
used z registers	0
nb stack references	0

Front-end

MACRO FUSION NOT POSSIBLE FIT IN UOP CACHE

micro-operation queue	8.50 cycles
front end	8.50 cycles

Back-end

	P0	P1	P2	P3	P4	P5	P6	P7	P8	P9	P10	P11	P12	P13	P14
uops	8.50	8.50	6.75	6.75	6.75	6.75	8.00	8.00	0.00	0.00	5.33	5.33	5.33	0.00	0.00
cycles	8.50	8.50	6.75	6.75	6.75	6.75	8.00	8.00	0.00	0.00	5.33	5.33	5.33	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

Cycles summary

Front-end	8.50
Dispatch	8.50
Overall L1	8.50

Vectorization ratios

INT

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

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

INT+FP

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

Vector efficiency ratios

INT

all	18%
load	25%
store	25%
mul	NA (no mul vectorizable/vectorized instructions)
add-sub	12%
fma	NA (no fma vectorizable/vectorized instructions)
other	12%

all	25%
load	NA (no load vectorizable/vectorized instructions)
store	NA (no store vectorizable/vectorized instructions)
mul	NA (no mul vectorizable/vectorized instructions)
add-sub	NA (no add-sub vectorizable/vectorized instructions)
fma	NA (no fma vectorizable/vectorized instructions)
div/sqrt	NA (no div/sqrt vectorizable/vectorized instructions)
other	25%

INT+FP

all	20%
load	25%
store	25%
mul	NA (no mul vectorizable/vectorized instructions)
add-sub	12%
fma	NA (no fma vectorizable/vectorized instructions)
div/sqrt	NA (no div/sqrt vectorizable/vectorized instructions)
other	18%

Cycles and memory resources usage

Assuming all data fit into the L1 cache, each iteration of the binary loop takes 8.50 cycles.

Front-end bottlenecks

Performance is limited by instruction throughput (loading/decoding program instructions to execution core) (front-end is a bottleneck). By removing all these bottlenecks, you can lower the cost of an iteration from 8.50 to 8.00 cycles (1.06x speedup).

ASM code

In the binary file, the address of the loop is: 42c0cc

Instruction	Nb FU	P0	P1	P2	P3	P4	P5	P6	P7	P10	P11	P12	Latency	Recip. throughput	Vectorization
LDR D7, [X0]	1	0	0	0	0	0	0	0	0	0.33	0.33	0.33	6	0.33	scal (25.0%)
FCMPE D31, D7	1	0	0	0	0	0	0	1	0	0	0	0	2	1	scal (25.0%)
B.LS 42c0e8 <_ZN16miniqmcreference17TwoBodyJastrowRefIN11qmcplusplus14BsplineFunctorIdEEE14evaluateRatiosERNS1_18VirtualParticleSetERSt6vectorIdSaIdEE+0x268>	1	0.50	0.50	0	0	0	0	0	0	0	0	0	1	0.50	N/A
CMP W24, W30	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	1	0.33	scal (12.5%)
B.EQ 42c0e8 <_ZN16miniqmcreference17TwoBodyJastrowRefIN11qmcplusplus14BsplineFunctorIdEEE14evaluateRatiosERNS1_18VirtualParticleSetERSt6vectorIdSaIdEE+0x268>	1	0.50	0.50	0	0	0	0	0	0	0	0	0	1	0.50	N/A
STR D7, [X4, W2,UXTW #3]	1	0	0	0	0	0	0	0.50	0.50	0.50	0.50	0	2	0.50	scal (25.0%)
ADD W2, W2, #1	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	1	0.25	N/A
LDR D8, [X0, #8]	1	0	0	0	0	0	0	0	0	0.33	0.33	0.33	6	0.33	scal (25.0%)
ADD W28, W30, #1	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	1	0.25	scal (12.5%)
ADD X0, X0, #8	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	1	0.25	N/A
FCMPE D31, D8	1	0	0	0	0	0	0	1	0	0	0	0	2	1	scal (25.0%)
B.LS 42c10c <_ZN16miniqmcreference17TwoBodyJastrowRefIN11qmcplusplus14BsplineFunctorIdEEE14evaluateRatiosERNS1_18VirtualParticleSetERSt6vectorIdSaIdEE+0x28c>	1	0.50	0.50	0	0	0	0	0	0	0	0	0	1	0.50	N/A
CMP W24, W28	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	1	0.33	scal (12.5%)
B.EQ 42c10c <_ZN16miniqmcreference17TwoBodyJastrowRefIN11qmcplusplus14BsplineFunctorIdEEE14evaluateRatiosERNS1_18VirtualParticleSetERSt6vectorIdSaIdEE+0x28c>	1	0.50	0.50	0	0	0	0	0	0	0	0	0	1	0.50	N/A
STR D8, [X4, W2,UXTW #3]	1	0	0	0	0	0	0	0.50	0.50	0.50	0.50	0	2	0.50	scal (25.0%)
ADD W2, W2, #1	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	1	0.25	N/A
LDR D9, [X0, #8]	1	0	0	0	0	0	0	0	0	0.33	0.33	0.33	6	0.33	scal (25.0%)
ADD W1, W28, #1	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	1	0.25	scal (12.5%)
FCMPE D31, D9	1	0	0	0	0	0	0	1	0	0	0	0	2	1	scal (25.0%)
B.LS 42c12c <_ZN16miniqmcreference17TwoBodyJastrowRefIN11qmcplusplus14BsplineFunctorIdEEE14evaluateRatiosERNS1_18VirtualParticleSetERSt6vectorIdSaIdEE+0x2ac>	1	0.50	0.50	0	0	0	0	0	0	0	0	0	1	0.50	N/A
CMP W24, W1	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	1	0.33	scal (12.5%)
B.EQ 42c12c <_ZN16miniqmcreference17TwoBodyJastrowRefIN11qmcplusplus14BsplineFunctorIdEEE14evaluateRatiosERNS1_18VirtualParticleSetERSt6vectorIdSaIdEE+0x2ac>	1	0.50	0.50	0	0	0	0	0	0	0	0	0	1	0.50	N/A
STR D9, [X4, W2,UXTW #3]	1	0	0	0	0	0	0	0.50	0.50	0.50	0.50	0	2	0.50	scal (25.0%)
ADD W2, W2, #1	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	1	0.25	N/A
LDR D10, [X0, #16]	1	0	0	0	0	0	0	0	0	0.33	0.33	0.33	6	0.33	scal (25.0%)
ADD W27, W28, #2	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	1	0.25	scal (12.5%)
FCMPE D31, D10	1	0	0	0	0	0	0	1	0	0	0	0	2	1	scal (25.0%)
B.LS 42c14c <_ZN16miniqmcreference17TwoBodyJastrowRefIN11qmcplusplus14BsplineFunctorIdEEE14evaluateRatiosERNS1_18VirtualParticleSetERSt6vectorIdSaIdEE+0x2cc>	1	0.50	0.50	0	0	0	0	0	0	0	0	0	1	0.50	N/A
CMP W24, W27	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	1	0.33	scal (12.5%)
B.EQ 42c14c <_ZN16miniqmcreference17TwoBodyJastrowRefIN11qmcplusplus14BsplineFunctorIdEEE14evaluateRatiosERNS1_18VirtualParticleSetERSt6vectorIdSaIdEE+0x2cc>	1	0.50	0.50	0	0	0	0	0	0	0	0	0	1	0.50	N/A
STR D10, [X4, W2,UXTW #3]	1	0	0	0	0	0	0	0.50	0.50	0.50	0.50	0	2	0.50	scal (25.0%)
ADD W2, W2, #1	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	1	0.25	N/A
LDR D11, [X0, #24]	1	0	0	0	0	0	0	0	0	0.33	0.33	0.33	6	0.33	scal (25.0%)
ADD W5, W28, #3	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	1	0.25	scal (12.5%)
FCMPE D31, D11	1	0	0	0	0	0	0	1	0	0	0	0	2	1	scal (25.0%)
B.LS 42c16c <_ZN16miniqmcreference17TwoBodyJastrowRefIN11qmcplusplus14BsplineFunctorIdEEE14evaluateRatiosERNS1_18VirtualParticleSetERSt6vectorIdSaIdEE+0x2ec>	1	0.50	0.50	0	0	0	0	0	0	0	0	0	1	0.50	N/A
CMP W24, W5	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	1	0.33	scal (12.5%)
B.EQ 42c16c <_ZN16miniqmcreference17TwoBodyJastrowRefIN11qmcplusplus14BsplineFunctorIdEEE14evaluateRatiosERNS1_18VirtualParticleSetERSt6vectorIdSaIdEE+0x2ec>	1	0.50	0.50	0	0	0	0	0	0	0	0	0	1	0.50	N/A
STR D11, [X4, W2,UXTW #3]	1	0	0	0	0	0	0	0.50	0.50	0.50	0.50	0	2	0.50	scal (25.0%)
ADD W2, W2, #1	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	1	0.25	N/A
LDR D12, [X0, #32]	1	0	0	0	0	0	0	0	0	0.33	0.33	0.33	6	0.33	scal (25.0%)
ADD W9, W28, #4	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	1	0.25	scal (12.5%)
FCMPE D31, D12	1	0	0	0	0	0	0	1	0	0	0	0	2	1	scal (25.0%)
B.LS 42c18c <_ZN16miniqmcreference17TwoBodyJastrowRefIN11qmcplusplus14BsplineFunctorIdEEE14evaluateRatiosERNS1_18VirtualParticleSetERSt6vectorIdSaIdEE+0x30c>	1	0.50	0.50	0	0	0	0	0	0	0	0	0	1	0.50	N/A
CMP W24, W9	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	1	0.33	scal (12.5%)
B.EQ 42c18c <_ZN16miniqmcreference17TwoBodyJastrowRefIN11qmcplusplus14BsplineFunctorIdEEE14evaluateRatiosERNS1_18VirtualParticleSetERSt6vectorIdSaIdEE+0x30c>	1	0.50	0.50	0	0	0	0	0	0	0	0	0	1	0.50	N/A
STR D12, [X4, W2,UXTW #3]	1	0	0	0	0	0	0	0.50	0.50	0.50	0.50	0	2	0.50	scal (25.0%)
ADD W2, W2, #1	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	1	0.25	N/A
LDR D13, [X0, #40]	1	0	0	0	0	0	0	0	0	0.33	0.33	0.33	6	0.33	scal (25.0%)
ADD W10, W28, #5	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	1	0.25	scal (12.5%)
FCMPE D31, D13	1	0	0	0	0	0	0	1	0	0	0	0	2	1	scal (25.0%)
B.LS 42c1ac <_ZN16miniqmcreference17TwoBodyJastrowRefIN11qmcplusplus14BsplineFunctorIdEEE14evaluateRatiosERNS1_18VirtualParticleSetERSt6vectorIdSaIdEE+0x32c>	1	0.50	0.50	0	0	0	0	0	0	0	0	0	1	0.50	N/A
CMP W24, W10	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	1	0.33	scal (12.5%)
B.EQ 42c1ac <_ZN16miniqmcreference17TwoBodyJastrowRefIN11qmcplusplus14BsplineFunctorIdEEE14evaluateRatiosERNS1_18VirtualParticleSetERSt6vectorIdSaIdEE+0x32c>	1	0.50	0.50	0	0	0	0	0	0	0	0	0	1	0.50	N/A
STR D13, [X4, W2,UXTW #3]	1	0	0	0	0	0	0	0.50	0.50	0.50	0.50	0	2	0.50	scal (25.0%)
ADD W2, W2, #1	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	1	0.25	N/A
LDR D14, [X0, #48]	1	0	0	0	0	0	0	0	0	0.33	0.33	0.33	6	0.33	scal (25.0%)
ADD W17, W28, #6	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	1	0.25	scal (12.5%)
FCMPE D31, D14	1	0	0	0	0	0	0	1	0	0	0	0	2	1	scal (25.0%)
B.LS 42c1cc <_ZN16miniqmcreference17TwoBodyJastrowRefIN11qmcplusplus14BsplineFunctorIdEEE14evaluateRatiosERNS1_18VirtualParticleSetERSt6vectorIdSaIdEE+0x34c>	1	0.50	0.50	0	0	0	0	0	0	0	0	0	1	0.50	N/A
CMP W24, W17	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	1	0.33	scal (12.5%)
B.EQ 42c1cc <_ZN16miniqmcreference17TwoBodyJastrowRefIN11qmcplusplus14BsplineFunctorIdEEE14evaluateRatiosERNS1_18VirtualParticleSetERSt6vectorIdSaIdEE+0x34c>	1	0.50	0.50	0	0	0	0	0	0	0	0	0	1	0.50	N/A
STR D14, [X4, W2,UXTW #3]	1	0	0	0	0	0	0	0.50	0.50	0.50	0.50	0	2	0.50	scal (25.0%)
ADD W2, W2, #1	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	1	0.25	N/A
ADD W30, W28, #7	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	1	0.25	N/A
ADD X0, X0, #56	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	1	0.25	N/A
CMP W18, W30	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	1	0.33	N/A
B.NE 42c0cc <_ZN16miniqmcreference17TwoBodyJastrowRefIN11qmcplusplus14BsplineFunctorIdEEE14evaluateRatiosERNS1_18VirtualParticleSetERSt6vectorIdSaIdEE+0x24c>	1	0.50	0.50	0	0	0	0	0	0	0	0	0	1	0.50	N/A

Function	miniqmcreference::TwoBodyJastrowRef >::evaluateRatios(qmcplusplus::VirtualParticleSet&, std::vector >&)
Source file and lines	BsplineFunctor.h:236-241
Module	exec

Ignoring paths for analysis
Too many paths. If you really need to analyze all of the 6561 paths individually, rerun with max-paths=6561
RecMII not computed since number of paths is unknown or > max_paths
Streams not analyzed since number of paths is unknown or > max_paths

hoisting them (moving them outside the loop)
turning them into conditional moves, MIN or MAX

Ex: if (x<0) x=0 => x = (x<0 ? 0 : x) (or MAX(0,x) after defining the corresponding macro)

gain
potential
hint
expert

Code clean check

Detected a slowdown caused by scalar integer instructions (typically used for address computation). By removing them, you can lower the cost of an iteration from 8.50 to 5.33 cycles (1.59x speedup).

Workaround

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

Vectorization

Details

All VPU instructions are used in scalar version (process only one data element in vector registers). Since your execution units are vector units, only a vectorized loop can use their full power.

Workaround

Try another compiler or update/tune your current one
Remove inter-iterations dependences from your loop and make it unit-stride:
- If your arrays have 2 or more dimensions, check whether elements are accessed contiguously and, otherwise, try to permute loops accordingly: C storage order is row-major: for(i) for(j) a[j][i] = b[j][i]; (slow, non stride 1) => for(i) for(j) a[i][j] = b[i][j]; (fast, stride 1)
- If your loop streams arrays of structures (AoS), try to use structures of arrays instead (SoA): for(i) a[i].x = b[i].x; (slow, non stride 1) => for(i) a.x[i] = b.x[i]; (fast, stride 1)

No data for this section

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

The binary loop does not contain any FP arithmetical operations. The binary loop does not load or store any data.

General properties

nb instructions	68
nb uops	68
loop length	272
used w registers	11
used x registers	2
used b registers	0
used h registers	0
used s registers	0
used d registers	9
used q registers	0
used v registers	0
used z registers	0
nb stack references	0

Front-end

MACRO FUSION NOT POSSIBLE FIT IN UOP CACHE

micro-operation queue	8.50 cycles
front end	8.50 cycles

Back-end

	P0	P1	P2	P3	P4	P5	P6	P7	P8	P9	P10	P11	P12	P13	P14
uops	8.50	8.50	6.75	6.75	6.75	6.75	8.00	8.00	0.00	0.00	5.33	5.33	5.33	0.00	0.00
cycles	8.50	8.50	6.75	6.75	6.75	6.75	8.00	8.00	0.00	0.00	5.33	5.33	5.33	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

Cycles summary

Front-end	8.50
Dispatch	8.50
Overall L1	8.50

Vectorization ratios

INT

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

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

INT+FP

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

Vector efficiency ratios

INT

all	18%
load	25%
store	25%
mul	NA (no mul vectorizable/vectorized instructions)
add-sub	12%
fma	NA (no fma vectorizable/vectorized instructions)
other	12%

all	25%
load	NA (no load vectorizable/vectorized instructions)
store	NA (no store vectorizable/vectorized instructions)
mul	NA (no mul vectorizable/vectorized instructions)
add-sub	NA (no add-sub vectorizable/vectorized instructions)
fma	NA (no fma vectorizable/vectorized instructions)
div/sqrt	NA (no div/sqrt vectorizable/vectorized instructions)
other	25%

INT+FP

all	20%
load	25%
store	25%
mul	NA (no mul vectorizable/vectorized instructions)
add-sub	12%
fma	NA (no fma vectorizable/vectorized instructions)
div/sqrt	NA (no div/sqrt vectorizable/vectorized instructions)
other	18%

Cycles and memory resources usage

Assuming all data fit into the L1 cache, each iteration of the binary loop takes 8.50 cycles.

Front-end bottlenecks

ASM code

In the binary file, the address of the loop is: 42c0cc

Instruction	Nb FU	P0	P1	P2	P3	P4	P5	P6	P7	P10	P11	P12	Latency	Recip. throughput	Vectorization
LDR D7, [X0]	1	0	0	0	0	0	0	0	0	0.33	0.33	0.33	6	0.33	scal (25.0%)
FCMPE D31, D7	1	0	0	0	0	0	0	1	0	0	0	0	2	1	scal (25.0%)
B.LS 42c0e8 <_ZN16miniqmcreference17TwoBodyJastrowRefIN11qmcplusplus14BsplineFunctorIdEEE14evaluateRatiosERNS1_18VirtualParticleSetERSt6vectorIdSaIdEE+0x268>	1	0.50	0.50	0	0	0	0	0	0	0	0	0	1	0.50	N/A
CMP W24, W30	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	1	0.33	scal (12.5%)
B.EQ 42c0e8 <_ZN16miniqmcreference17TwoBodyJastrowRefIN11qmcplusplus14BsplineFunctorIdEEE14evaluateRatiosERNS1_18VirtualParticleSetERSt6vectorIdSaIdEE+0x268>	1	0.50	0.50	0	0	0	0	0	0	0	0	0	1	0.50	N/A
STR D7, [X4, W2,UXTW #3]	1	0	0	0	0	0	0	0.50	0.50	0.50	0.50	0	2	0.50	scal (25.0%)
ADD W2, W2, #1	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	1	0.25	N/A
LDR D8, [X0, #8]	1	0	0	0	0	0	0	0	0	0.33	0.33	0.33	6	0.33	scal (25.0%)
ADD W28, W30, #1	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	1	0.25	scal (12.5%)
ADD X0, X0, #8	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	1	0.25	N/A
FCMPE D31, D8	1	0	0	0	0	0	0	1	0	0	0	0	2	1	scal (25.0%)
B.LS 42c10c <_ZN16miniqmcreference17TwoBodyJastrowRefIN11qmcplusplus14BsplineFunctorIdEEE14evaluateRatiosERNS1_18VirtualParticleSetERSt6vectorIdSaIdEE+0x28c>	1	0.50	0.50	0	0	0	0	0	0	0	0	0	1	0.50	N/A
CMP W24, W28	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	1	0.33	scal (12.5%)
B.EQ 42c10c <_ZN16miniqmcreference17TwoBodyJastrowRefIN11qmcplusplus14BsplineFunctorIdEEE14evaluateRatiosERNS1_18VirtualParticleSetERSt6vectorIdSaIdEE+0x28c>	1	0.50	0.50	0	0	0	0	0	0	0	0	0	1	0.50	N/A
STR D8, [X4, W2,UXTW #3]	1	0	0	0	0	0	0	0.50	0.50	0.50	0.50	0	2	0.50	scal (25.0%)
ADD W2, W2, #1	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	1	0.25	N/A
LDR D9, [X0, #8]	1	0	0	0	0	0	0	0	0	0.33	0.33	0.33	6	0.33	scal (25.0%)
ADD W1, W28, #1	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	1	0.25	scal (12.5%)
FCMPE D31, D9	1	0	0	0	0	0	0	1	0	0	0	0	2	1	scal (25.0%)
B.LS 42c12c <_ZN16miniqmcreference17TwoBodyJastrowRefIN11qmcplusplus14BsplineFunctorIdEEE14evaluateRatiosERNS1_18VirtualParticleSetERSt6vectorIdSaIdEE+0x2ac>	1	0.50	0.50	0	0	0	0	0	0	0	0	0	1	0.50	N/A
CMP W24, W1	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	1	0.33	scal (12.5%)
B.EQ 42c12c <_ZN16miniqmcreference17TwoBodyJastrowRefIN11qmcplusplus14BsplineFunctorIdEEE14evaluateRatiosERNS1_18VirtualParticleSetERSt6vectorIdSaIdEE+0x2ac>	1	0.50	0.50	0	0	0	0	0	0	0	0	0	1	0.50	N/A
STR D9, [X4, W2,UXTW #3]	1	0	0	0	0	0	0	0.50	0.50	0.50	0.50	0	2	0.50	scal (25.0%)
ADD W2, W2, #1	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	1	0.25	N/A
LDR D10, [X0, #16]	1	0	0	0	0	0	0	0	0	0.33	0.33	0.33	6	0.33	scal (25.0%)
ADD W27, W28, #2	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	1	0.25	scal (12.5%)
FCMPE D31, D10	1	0	0	0	0	0	0	1	0	0	0	0	2	1	scal (25.0%)
B.LS 42c14c <_ZN16miniqmcreference17TwoBodyJastrowRefIN11qmcplusplus14BsplineFunctorIdEEE14evaluateRatiosERNS1_18VirtualParticleSetERSt6vectorIdSaIdEE+0x2cc>	1	0.50	0.50	0	0	0	0	0	0	0	0	0	1	0.50	N/A
CMP W24, W27	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	1	0.33	scal (12.5%)
B.EQ 42c14c <_ZN16miniqmcreference17TwoBodyJastrowRefIN11qmcplusplus14BsplineFunctorIdEEE14evaluateRatiosERNS1_18VirtualParticleSetERSt6vectorIdSaIdEE+0x2cc>	1	0.50	0.50	0	0	0	0	0	0	0	0	0	1	0.50	N/A
STR D10, [X4, W2,UXTW #3]	1	0	0	0	0	0	0	0.50	0.50	0.50	0.50	0	2	0.50	scal (25.0%)
ADD W2, W2, #1	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	1	0.25	N/A
LDR D11, [X0, #24]	1	0	0	0	0	0	0	0	0	0.33	0.33	0.33	6	0.33	scal (25.0%)
ADD W5, W28, #3	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	1	0.25	scal (12.5%)
FCMPE D31, D11	1	0	0	0	0	0	0	1	0	0	0	0	2	1	scal (25.0%)
B.LS 42c16c <_ZN16miniqmcreference17TwoBodyJastrowRefIN11qmcplusplus14BsplineFunctorIdEEE14evaluateRatiosERNS1_18VirtualParticleSetERSt6vectorIdSaIdEE+0x2ec>	1	0.50	0.50	0	0	0	0	0	0	0	0	0	1	0.50	N/A
CMP W24, W5	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	1	0.33	scal (12.5%)
B.EQ 42c16c <_ZN16miniqmcreference17TwoBodyJastrowRefIN11qmcplusplus14BsplineFunctorIdEEE14evaluateRatiosERNS1_18VirtualParticleSetERSt6vectorIdSaIdEE+0x2ec>	1	0.50	0.50	0	0	0	0	0	0	0	0	0	1	0.50	N/A
STR D11, [X4, W2,UXTW #3]	1	0	0	0	0	0	0	0.50	0.50	0.50	0.50	0	2	0.50	scal (25.0%)
ADD W2, W2, #1	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	1	0.25	N/A
LDR D12, [X0, #32]	1	0	0	0	0	0	0	0	0	0.33	0.33	0.33	6	0.33	scal (25.0%)
ADD W9, W28, #4	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	1	0.25	scal (12.5%)
FCMPE D31, D12	1	0	0	0	0	0	0	1	0	0	0	0	2	1	scal (25.0%)
B.LS 42c18c <_ZN16miniqmcreference17TwoBodyJastrowRefIN11qmcplusplus14BsplineFunctorIdEEE14evaluateRatiosERNS1_18VirtualParticleSetERSt6vectorIdSaIdEE+0x30c>	1	0.50	0.50	0	0	0	0	0	0	0	0	0	1	0.50	N/A
CMP W24, W9	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	1	0.33	scal (12.5%)
B.EQ 42c18c <_ZN16miniqmcreference17TwoBodyJastrowRefIN11qmcplusplus14BsplineFunctorIdEEE14evaluateRatiosERNS1_18VirtualParticleSetERSt6vectorIdSaIdEE+0x30c>	1	0.50	0.50	0	0	0	0	0	0	0	0	0	1	0.50	N/A
STR D12, [X4, W2,UXTW #3]	1	0	0	0	0	0	0	0.50	0.50	0.50	0.50	0	2	0.50	scal (25.0%)
ADD W2, W2, #1	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	1	0.25	N/A
LDR D13, [X0, #40]	1	0	0	0	0	0	0	0	0	0.33	0.33	0.33	6	0.33	scal (25.0%)
ADD W10, W28, #5	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	1	0.25	scal (12.5%)
FCMPE D31, D13	1	0	0	0	0	0	0	1	0	0	0	0	2	1	scal (25.0%)
B.LS 42c1ac <_ZN16miniqmcreference17TwoBodyJastrowRefIN11qmcplusplus14BsplineFunctorIdEEE14evaluateRatiosERNS1_18VirtualParticleSetERSt6vectorIdSaIdEE+0x32c>	1	0.50	0.50	0	0	0	0	0	0	0	0	0	1	0.50	N/A
CMP W24, W10	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	1	0.33	scal (12.5%)
B.EQ 42c1ac <_ZN16miniqmcreference17TwoBodyJastrowRefIN11qmcplusplus14BsplineFunctorIdEEE14evaluateRatiosERNS1_18VirtualParticleSetERSt6vectorIdSaIdEE+0x32c>	1	0.50	0.50	0	0	0	0	0	0	0	0	0	1	0.50	N/A
STR D13, [X4, W2,UXTW #3]	1	0	0	0	0	0	0	0.50	0.50	0.50	0.50	0	2	0.50	scal (25.0%)
ADD W2, W2, #1	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	1	0.25	N/A
LDR D14, [X0, #48]	1	0	0	0	0	0	0	0	0	0.33	0.33	0.33	6	0.33	scal (25.0%)
ADD W17, W28, #6	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	1	0.25	scal (12.5%)
FCMPE D31, D14	1	0	0	0	0	0	0	1	0	0	0	0	2	1	scal (25.0%)
B.LS 42c1cc <_ZN16miniqmcreference17TwoBodyJastrowRefIN11qmcplusplus14BsplineFunctorIdEEE14evaluateRatiosERNS1_18VirtualParticleSetERSt6vectorIdSaIdEE+0x34c>	1	0.50	0.50	0	0	0	0	0	0	0	0	0	1	0.50	N/A
CMP W24, W17	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	1	0.33	scal (12.5%)
B.EQ 42c1cc <_ZN16miniqmcreference17TwoBodyJastrowRefIN11qmcplusplus14BsplineFunctorIdEEE14evaluateRatiosERNS1_18VirtualParticleSetERSt6vectorIdSaIdEE+0x34c>	1	0.50	0.50	0	0	0	0	0	0	0	0	0	1	0.50	N/A
STR D14, [X4, W2,UXTW #3]	1	0	0	0	0	0	0	0.50	0.50	0.50	0.50	0	2	0.50	scal (25.0%)
ADD W2, W2, #1	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	1	0.25	N/A
ADD W30, W28, #7	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	1	0.25	N/A
ADD X0, X0, #56	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	1	0.25	N/A
CMP W18, W30	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	1	0.33	N/A
B.NE 42c0cc <_ZN16miniqmcreference17TwoBodyJastrowRefIN11qmcplusplus14BsplineFunctorIdEEE14evaluateRatiosERNS1_18VirtualParticleSetERSt6vectorIdSaIdEE+0x24c>	1	0.50	0.50	0	0	0	0	0	0	0	0	0	1	0.50	N/A

Report Configuration

Code clean check

Workaround

Vectorization

Details

Workaround

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

General properties

Front-end

Back-end

Cycles summary

Vectorization ratios

Vector efficiency ratios

Cycles and memory resources usage

Front-end bottlenecks

ASM code

Code clean check

Workaround

Vectorization

Details

Workaround

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

General properties

Front-end

Back-end

Cycles summary

Vectorization ratios

Vector efficiency ratios

Cycles and memory resources usage

Front-end bottlenecks

ASM code