OV - exec - Loop 1128

	Loop Id: 1128	Module: exec	Source: :0-0	Coverage: 0.01%

0x4a6b6f VMOVUPD	(%RCX),%ZMM3    [4]

0x4a6b75 VMOVUPD	0x40(%RCX),%ZMM15    [4]

0x4a6b7c VMOVUPD	0x80(%RCX),%ZMM14    [4]

0x4a6b83 VMOVUPD	(%R10),%ZMM12    [2]

0x4a6b89 VMOVUPD	0x40(%R10),%ZMM13    [2]

0x4a6b90 ADD	$0x100,%R10

0x4a6b97 ADD	$0x300,%RCX

0x4a6b9e VMOVAPD	%ZMM3,%ZMM4

0x4a6ba4 VMOVAPD	%ZMM3,%ZMM5

0x4a6baa VPERMT2PD	%ZMM15,%ZMM7,%ZMM3

0x4a6bb0 VPERMT2PD	%ZMM15,%ZMM11,%ZMM4

0x4a6bb6 VPERMT2PD	%ZMM14,%ZMM6,%ZMM3

0x4a6bbc VPERMT2PD	%ZMM15,%ZMM9,%ZMM5

0x4a6bc2 VMOVUPD	-0x1c0(%RCX),%ZMM15    [3]

0x4a6bc9 VFMADD231PD	%ZMM12,%ZMM3,%ZMM0

0x4a6bcf VPERMT2PD	%ZMM14,%ZMM10,%ZMM4

0x4a6bd5 VMOVUPD	-0x200(%RCX),%ZMM3    [3]

0x4a6bdc VPERMT2PD	%ZMM14,%ZMM8,%ZMM5

0x4a6be2 VFMADD231PD	%ZMM12,%ZMM4,%ZMM1

0x4a6be8 VMOVUPD	-0x240(%RCX),%ZMM4    [3]

0x4a6bef VMOVUPD	-0x100(%RCX),%ZMM14    [3]

0x4a6bf6 VFMADD132PD	%ZMM12,%ZMM2,%ZMM5

0x4a6bfc VMOVAPD	%ZMM4,%ZMM12

0x4a6c02 VMOVAPD	%ZMM4,%ZMM2

0x4a6c08 VPERMT2PD	%ZMM3,%ZMM7,%ZMM4

0x4a6c0e VPERMT2PD	%ZMM3,%ZMM11,%ZMM12

0x4a6c14 VPERMT2PD	%ZMM3,%ZMM9,%ZMM2

0x4a6c1a VPERMT2PD	%ZMM15,%ZMM6,%ZMM4

0x4a6c20 VMOVUPD	-0x180(%RCX),%ZMM3    [3]

0x4a6c27 VFMADD132PD	%ZMM13,%ZMM0,%ZMM4

0x4a6c2d VMOVUPD	-0x140(%RCX),%ZMM0    [3]

0x4a6c34 VPERMT2PD	%ZMM15,%ZMM10,%ZMM12

0x4a6c3a VPERMT2PD	%ZMM15,%ZMM8,%ZMM2

0x4a6c40 VFMADD132PD	%ZMM13,%ZMM1,%ZMM12

0x4a6c46 VFMADD132PD	%ZMM13,%ZMM5,%ZMM2

0x4a6c4c VMOVUPD	-0x80(%R10),%ZMM13    [1]

0x4a6c53 VMOVAPD	%ZMM3,%ZMM1

0x4a6c59 VMOVAPD	%ZMM3,%ZMM5

0x4a6c5f VPERMT2PD	%ZMM0,%ZMM9,%ZMM1

0x4a6c65 VPERMT2PD	%ZMM0,%ZMM7,%ZMM3

0x4a6c6b VPERMT2PD	%ZMM0,%ZMM11,%ZMM5

0x4a6c71 VMOVUPD	-0xc0(%RCX),%ZMM0    [3]

0x4a6c78 VPERMT2PD	%ZMM14,%ZMM8,%ZMM1

0x4a6c7e VPERMT2PD	%ZMM14,%ZMM6,%ZMM3

0x4a6c84 VPERMT2PD	%ZMM14,%ZMM10,%ZMM5

0x4a6c8a VFMADD132PD	%ZMM13,%ZMM4,%ZMM3

0x4a6c90 VMOVUPD	-0x80(%RCX),%ZMM4    [3]

0x4a6c97 VFMADD132PD	%ZMM13,%ZMM12,%ZMM5

0x4a6c9d VMOVAPD	%ZMM1,%ZMM15

0x4a6ca3 VFMADD132PD	%ZMM13,%ZMM2,%ZMM15

0x4a6ca9 VMOVUPD	-0x40(%RCX),%ZMM13    [3]

0x4a6cb0 VMOVUPD	-0x40(%R10),%ZMM12    [1]

0x4a6cb7 VMOVAPD	%ZMM0,%ZMM1

0x4a6cbd VMOVAPD	%ZMM0,%ZMM2

0x4a6cc3 VPERMT2PD	%ZMM4,%ZMM11,%ZMM1

0x4a6cc9 VPERMT2PD	%ZMM4,%ZMM9,%ZMM2

0x4a6ccf VPERMT2PD	%ZMM4,%ZMM7,%ZMM0

0x4a6cd5 VPERMT2PD	%ZMM13,%ZMM10,%ZMM1

0x4a6cdb VPERMT2PD	%ZMM13,%ZMM8,%ZMM2

0x4a6ce1 VPERMT2PD	%ZMM13,%ZMM6,%ZMM0

0x4a6ce7 VFMADD132PD	%ZMM12,%ZMM3,%ZMM0

0x4a6ced VFMADD132PD	%ZMM12,%ZMM5,%ZMM1

0x4a6cf3 VFMADD132PD	%ZMM12,%ZMM15,%ZMM2

0x4a6cf9 CMP	%R9,%R10

0x4a6cfc JNE	4a6b6f

  ***  This Panel is Intentionally Left Blank.  ***

It is due to a lack of debug symbols in the given object
(loop or function).

Coverage (%)	Name	Source Location	Module
►97.49+	qmcplusplus::WaveFunction::rat[...]		exec
○	main._omp_fn.1		exec
○	gomp_thread_start	team.c:130	libgomp.so.1.0.0
○	start_thread		libc.so.6
○	__GI___clone3		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	1.00
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	1.33
Bottlenecks
Function	miniqmcreference::DiracDeterminantRef >::ratioGrad(qmcplusplus::ParticleSet&, int, qmcplusplus::TinyVector&)
Source
Source loop unroll info	NA
Source loop unroll confidence level	NA
Unroll/vectorization loop type	NA
Unroll factor	NA
CQA cycles	16.00
CQA cycles if no scalar integer	16.00
CQA cycles if FP arith vectorized	16.00
CQA cycles if fully vectorized	16.00
Front-end cycles	8.00
P0 cycles	0.50
P1 cycles	0.50
P2 cycles	0.50
P3 cycles	0.50
P4 cycles	0.50
P5 cycles	0.50
P6 cycles	4.00
P7 cycles	4.00
P8 cycles	4.00
P9 cycles	4.00
P10 cycles	12.00
P11 cycles	12.00
P12 cycles	12.00
P13 cycles	0.00
P14 cycles	0.00
P15 cycles	0.00
DIV/SQRT cycles	0.00
Inter-iter dependencies cycles	16
FE+BE cycles (UFS)	NA
Stall cycles (UFS)	NA
Nb insns	65.00
Nb uops	64.00
Nb loads	16.00
Nb stores	0.00
Nb stack references	0.00
FLOP/cycle	12.00
Nb FLOP add-sub	0.00
Nb FLOP mul	0.00
Nb FLOP fma	96.00
Nb FLOP div	0.00
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	1024.00
Bytes stored	0.00
Stride 0	0.00
Stride 1	0.00
Stride n	4.00
Stride unknown	0.00
Stride indirect	0.00
Vectorization ratio all	100.00
Vectorization ratio load	100.00
Vectorization ratio store	NA
Vectorization ratio mul	NA
Vectorization ratio add_sub	NA
Vectorization ratio fma	100.00
Vectorization ratio div_sqrt	NA
Vectorization ratio other	100.00
Vector-efficiency ratio all	100.00
Vector-efficiency ratio load	100.00
Vector-efficiency ratio store	NA
Vector-efficiency ratio mul	NA
Vector-efficiency ratio add_sub	NA
Vector-efficiency ratio fma	100.00
Vector-efficiency ratio div_sqrt	NA
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	1.33
Bottlenecks
Function	miniqmcreference::DiracDeterminantRef >::ratioGrad(qmcplusplus::ParticleSet&, int, qmcplusplus::TinyVector&)
Source
Source loop unroll info	NA
Source loop unroll confidence level	NA
Unroll/vectorization loop type	NA
Unroll factor	NA
CQA cycles	16.00
CQA cycles if no scalar integer	16.00
CQA cycles if FP arith vectorized	16.00
CQA cycles if fully vectorized	16.00
Front-end cycles	8.00
P0 cycles	0.50
P1 cycles	0.50
P2 cycles	0.50
P3 cycles	0.50
P4 cycles	0.50
P5 cycles	0.50
P6 cycles	4.00
P7 cycles	4.00
P8 cycles	4.00
P9 cycles	4.00
P10 cycles	12.00
P11 cycles	12.00
P12 cycles	12.00
P13 cycles	0.00
P14 cycles	0.00
P15 cycles	0.00
DIV/SQRT cycles	0.00
Inter-iter dependencies cycles	16
FE+BE cycles (UFS)	NA
Stall cycles (UFS)	NA
Nb insns	65.00
Nb uops	64.00
Nb loads	16.00
Nb stores	0.00
Nb stack references	0.00
FLOP/cycle	12.00
Nb FLOP add-sub	0.00
Nb FLOP mul	0.00
Nb FLOP fma	96.00
Nb FLOP div	0.00
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	1024.00
Bytes stored	0.00
Stride 0	0.00
Stride 1	0.00
Stride n	4.00
Stride unknown	0.00
Stride indirect	0.00
Vectorization ratio all	100.00
Vectorization ratio load	100.00
Vectorization ratio store	NA
Vectorization ratio mul	NA
Vectorization ratio add_sub	NA
Vectorization ratio fma	100.00
Vectorization ratio div_sqrt	NA
Vectorization ratio other	100.00
Vector-efficiency ratio all	100.00
Vector-efficiency ratio load	100.00
Vector-efficiency ratio store	NA
Vector-efficiency ratio mul	NA
Vector-efficiency ratio add_sub	NA
Vector-efficiency ratio fma	100.00
Vector-efficiency ratio div_sqrt	NA
Vector-efficiency ratio other	100.00

Path /

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

Function	miniqmcreference::DiracDeterminantRef >::ratioGrad(qmcplusplus::ParticleSet&, int, qmcplusplus::TinyVector&)
Source file and lines
Module	exec

gain
potential
hint
expert

Vectorization

Your loop is fully vectorized, using full register length.

Details

All SSE/AVX instructions are used in vector version (process two or more data elements in vector registers).

Execution units bottlenecks

Found no such bottlenecks but see expert reports for more complex bottlenecks.

FMA

Detected 96 FMA (fused multiply-add) operations.

Slow data structures access

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

Details

Constant non-unit stride: 4 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)

Vector unaligned load/store instructions

Detected 16 optimal vector unaligned load/store instructions.

Details

VMOVUPD: 16 occurrences►

Workaround

Use vector aligned instructions:

align your arrays on 64 bytes boundaries
inform your compiler that your arrays are vector aligned: read your compiler manual.

Type of elements and instruction set

12 AVX-512 instructions are processing arithmetic or math operations on double precision FP elements in vector mode (eight at a time).

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

The binary loop is composed of 192 FP arithmetical operations:

96: addition or subtraction (all inside FMA instructions)
96: multiply (all inside FMA instructions)

The binary loop is loading 1024 bytes (128 double precision FP elements).

Arithmetic intensity

Arithmetic intensity is 0.19 FP operations per loaded or stored byte.

General properties

nb instructions	65
nb uops	64
loop length	403
used x86 registers	3
used mmx registers	0
used xmm registers	0
used ymm registers	0
used zmm registers	16
nb stack references	0

Front-end

ASSUMED MACRO FUSION FIT IN UOP CACHE

micro-operation queue	8.00 cycles
front end	8.00 cycles

Back-end

	P0	P1	P2	P3	P4	P5	P6	P7	P8	P9	P10	P11	P12	P13	P14	P15
uops	0.50	0.50	0.50	0.50	0.50	0.50	4.00	4.00	4.00	4.00	12.00	12.00	12.00	0.00	0.00	0.00
cycles	0.50	0.50	0.50	0.50	0.50	0.50	4.00	4.00	4.00	4.00	12.00	12.00	12.00	0.00	0.00	0.00

Execution ports to units layout:

P0: ALU
P1: ALU
P2: ALU
P3: ALU, BRU
P4: ALU, BRU
P5: ALU, BRU
P6 (512 bits): store address, load
P7 (512 bits): store address, load
P8 (512 bits): store address, load
P9 (512 bits): store address, load
P10 (512 bits): VPU, DIV/SQRT
P11 (512 bits): VPU, DIV/SQRT
P12 (512 bits): VPU
P13 (512 bits): VPU
P14 (512 bits): FP store data
P15 (512 bits): FP store data

Cycles executing div or sqrt instructions	NA
Longest recurrence chain latency (RecMII)	16.00

Cycles summary

Front-end	8.00
Dispatch	12.00
Data deps.	16.00
Overall L1	16.00

Vectorization ratios

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

Vector efficiency ratios

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

Cycles and memory resources usage

Assuming all data fit into the L1 cache, each iteration of the binary loop takes 16.00 cycles. At this rate:

25% of peak load performance is reached (64.00 out of 256.00 bytes loaded per cycle (GB/s @ 1GHz))

Front-end bottlenecks

Found no such bottlenecks.

ASM code

In the binary file, the address of the loop is: 4a6b6f

Instruction	Nb FU	P0	P1	P2	P3	P4	P5	P6	P7	P8	P9	P10	P11	P12	Latency	Recip. throughput	Vectorization
VMOVUPD (%RCX),%ZMM3	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	3	0.50	vect (100.0%)
VMOVUPD 0x40(%RCX),%ZMM15	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	3	0.50	vect (100.0%)
VMOVUPD 0x80(%RCX),%ZMM14	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	3	0.50	vect (100.0%)
VMOVUPD (%R10),%ZMM12	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	3	0.50	vect (100.0%)
VMOVUPD 0x40(%R10),%ZMM13	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	3	0.50	vect (100.0%)
ADD $0x100,%R10	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	1	0.17	N/A
ADD $0x300,%RCX	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	1	0.17	N/A
VMOVAPD %ZMM3,%ZMM4	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	vect (100.0%)
VMOVAPD %ZMM3,%ZMM5	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	vect (100.0%)
VPERMT2PD %ZMM15,%ZMM7,%ZMM3	1	0	0	0	0	0	0	0	0	0	0	0	0.50	0.50	5	0.50	vect (100.0%)
VPERMT2PD %ZMM15,%ZMM11,%ZMM4	1	0	0	0	0	0	0	0	0	0	0	0	0.50	0.50	5	0.50	vect (100.0%)
VPERMT2PD %ZMM14,%ZMM6,%ZMM3	1	0	0	0	0	0	0	0	0	0	0	0	0.50	0.50	5	0.50	vect (100.0%)
VPERMT2PD %ZMM15,%ZMM9,%ZMM5	1	0	0	0	0	0	0	0	0	0	0	0	0.50	0.50	5	0.50	vect (100.0%)
VMOVUPD -0x1c0(%RCX),%ZMM15	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	3	0.50	vect (100.0%)
VFMADD231PD %ZMM12,%ZMM3,%ZMM0	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	0	4	0.50	vect (100.0%)
VPERMT2PD %ZMM14,%ZMM10,%ZMM4	1	0	0	0	0	0	0	0	0	0	0	0	0.50	0.50	5	0.50	vect (100.0%)
VMOVUPD -0x200(%RCX),%ZMM3	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	3	0.50	vect (100.0%)
VPERMT2PD %ZMM14,%ZMM8,%ZMM5	1	0	0	0	0	0	0	0	0	0	0	0	0.50	0.50	5	0.50	vect (100.0%)
VFMADD231PD %ZMM12,%ZMM4,%ZMM1	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	0	4	0.50	vect (100.0%)
VMOVUPD -0x240(%RCX),%ZMM4	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	3	0.50	vect (100.0%)
VMOVUPD -0x100(%RCX),%ZMM14	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	3	0.50	vect (100.0%)
VFMADD132PD %ZMM12,%ZMM2,%ZMM5	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	0	4	0.50	vect (100.0%)
VMOVAPD %ZMM4,%ZMM12	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	vect (100.0%)
VMOVAPD %ZMM4,%ZMM2	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	vect (100.0%)
VPERMT2PD %ZMM3,%ZMM7,%ZMM4	1	0	0	0	0	0	0	0	0	0	0	0	0.50	0.50	5	0.50	vect (100.0%)
VPERMT2PD %ZMM3,%ZMM11,%ZMM12	1	0	0	0	0	0	0	0	0	0	0	0	0.50	0.50	5	0.50	vect (100.0%)
VPERMT2PD %ZMM3,%ZMM9,%ZMM2	1	0	0	0	0	0	0	0	0	0	0	0	0.50	0.50	5	0.50	vect (100.0%)
VPERMT2PD %ZMM15,%ZMM6,%ZMM4	1	0	0	0	0	0	0	0	0	0	0	0	0.50	0.50	5	0.50	vect (100.0%)
VMOVUPD -0x180(%RCX),%ZMM3	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	3	0.50	vect (100.0%)
VFMADD132PD %ZMM13,%ZMM0,%ZMM4	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	0	4	0.50	vect (100.0%)
VMOVUPD -0x140(%RCX),%ZMM0	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	3	0.50	vect (100.0%)
VPERMT2PD %ZMM15,%ZMM10,%ZMM12	1	0	0	0	0	0	0	0	0	0	0	0	0.50	0.50	5	0.50	vect (100.0%)
VPERMT2PD %ZMM15,%ZMM8,%ZMM2	1	0	0	0	0	0	0	0	0	0	0	0	0.50	0.50	5	0.50	vect (100.0%)
VFMADD132PD %ZMM13,%ZMM1,%ZMM12	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	0	4	0.50	vect (100.0%)
VFMADD132PD %ZMM13,%ZMM5,%ZMM2	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	0	4	0.50	vect (100.0%)
VMOVUPD -0x80(%R10),%ZMM13	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	3	0.50	vect (100.0%)
VMOVAPD %ZMM3,%ZMM1	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	vect (100.0%)
VMOVAPD %ZMM3,%ZMM5	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	vect (100.0%)
VPERMT2PD %ZMM0,%ZMM9,%ZMM1	1	0	0	0	0	0	0	0	0	0	0	0	0.50	0.50	5	0.50	vect (100.0%)
VPERMT2PD %ZMM0,%ZMM7,%ZMM3	1	0	0	0	0	0	0	0	0	0	0	0	0.50	0.50	5	0.50	vect (100.0%)
VPERMT2PD %ZMM0,%ZMM11,%ZMM5	1	0	0	0	0	0	0	0	0	0	0	0	0.50	0.50	5	0.50	vect (100.0%)
VMOVUPD -0xc0(%RCX),%ZMM0	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	3	0.50	vect (100.0%)
VPERMT2PD %ZMM14,%ZMM8,%ZMM1	1	0	0	0	0	0	0	0	0	0	0	0	0.50	0.50	5	0.50	vect (100.0%)
VPERMT2PD %ZMM14,%ZMM6,%ZMM3	1	0	0	0	0	0	0	0	0	0	0	0	0.50	0.50	5	0.50	vect (100.0%)
VPERMT2PD %ZMM14,%ZMM10,%ZMM5	1	0	0	0	0	0	0	0	0	0	0	0	0.50	0.50	5	0.50	vect (100.0%)
VFMADD132PD %ZMM13,%ZMM4,%ZMM3	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	0	4	0.50	vect (100.0%)
VMOVUPD -0x80(%RCX),%ZMM4	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	3	0.50	vect (100.0%)
VFMADD132PD %ZMM13,%ZMM12,%ZMM5	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	0	4	0.50	vect (100.0%)
VMOVAPD %ZMM1,%ZMM15	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	vect (100.0%)
VFMADD132PD %ZMM13,%ZMM2,%ZMM15	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	0	4	0.50	vect (100.0%)
VMOVUPD -0x40(%RCX),%ZMM13	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	3	0.50	vect (100.0%)
VMOVUPD -0x40(%R10),%ZMM12	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	3	0.50	vect (100.0%)
VMOVAPD %ZMM0,%ZMM1	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	vect (100.0%)
VMOVAPD %ZMM0,%ZMM2	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	vect (100.0%)
VPERMT2PD %ZMM4,%ZMM11,%ZMM1	1	0	0	0	0	0	0	0	0	0	0	0	0.50	0.50	5	0.50	vect (100.0%)
VPERMT2PD %ZMM4,%ZMM9,%ZMM2	1	0	0	0	0	0	0	0	0	0	0	0	0.50	0.50	5	0.50	vect (100.0%)
VPERMT2PD %ZMM4,%ZMM7,%ZMM0	1	0	0	0	0	0	0	0	0	0	0	0	0.50	0.50	5	0.50	vect (100.0%)
VPERMT2PD %ZMM13,%ZMM10,%ZMM1	1	0	0	0	0	0	0	0	0	0	0	0	0.50	0.50	5	0.50	vect (100.0%)
VPERMT2PD %ZMM13,%ZMM8,%ZMM2	1	0	0	0	0	0	0	0	0	0	0	0	0.50	0.50	5	0.50	vect (100.0%)
VPERMT2PD %ZMM13,%ZMM6,%ZMM0	1	0	0	0	0	0	0	0	0	0	0	0	0.50	0.50	5	0.50	vect (100.0%)
VFMADD132PD %ZMM12,%ZMM3,%ZMM0	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	0	4	0.50	vect (100.0%)
VFMADD132PD %ZMM12,%ZMM5,%ZMM1	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	0	4	0.50	vect (100.0%)
VFMADD132PD %ZMM12,%ZMM15,%ZMM2	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	0	4	0.50	vect (100.0%)
CMP %R9,%R10	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	1	0.17	N/A
JNE 4a6b6f <_ZN16miniqmcreference19DiracDeterminantRefIN11qmcplusplus13DelayedUpdateIddEEE9ratioGradERNS1_11ParticleSetEiRNS1_10TinyVectorIdLj3EEE+0x4bf>	1	0	0	0	0.33	0.33	0.33	0	0	0	0	0	0	0	1	0.50-1	N/A

Function	miniqmcreference::DiracDeterminantRef >::ratioGrad(qmcplusplus::ParticleSet&, int, qmcplusplus::TinyVector&)
Source file and lines
Module	exec

gain
potential
hint
expert

Vectorization

Your loop is fully vectorized, using full register length.

Details

All SSE/AVX instructions are used in vector version (process two or more data elements in vector registers).

Execution units bottlenecks

Found no such bottlenecks but see expert reports for more complex bottlenecks.

FMA

Detected 96 FMA (fused multiply-add) operations.

Slow data structures access

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

Details

Constant non-unit stride: 4 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)

Vector unaligned load/store instructions

Detected 16 optimal vector unaligned load/store instructions.

Details

VMOVUPD: 16 occurrences►

Workaround

Use vector aligned instructions:

align your arrays on 64 bytes boundaries
inform your compiler that your arrays are vector aligned: read your compiler manual.

Type of elements and instruction set

12 AVX-512 instructions are processing arithmetic or math operations on double precision FP elements in vector mode (eight at a time).

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

The binary loop is composed of 192 FP arithmetical operations:

96: addition or subtraction (all inside FMA instructions)
96: multiply (all inside FMA instructions)

The binary loop is loading 1024 bytes (128 double precision FP elements).

Arithmetic intensity

Arithmetic intensity is 0.19 FP operations per loaded or stored byte.

General properties

nb instructions	65
nb uops	64
loop length	403
used x86 registers	3
used mmx registers	0
used xmm registers	0
used ymm registers	0
used zmm registers	16
nb stack references	0

Front-end

ASSUMED MACRO FUSION FIT IN UOP CACHE

micro-operation queue	8.00 cycles
front end	8.00 cycles

Back-end

	P0	P1	P2	P3	P4	P5	P6	P7	P8	P9	P10	P11	P12	P13	P14	P15
uops	0.50	0.50	0.50	0.50	0.50	0.50	4.00	4.00	4.00	4.00	12.00	12.00	12.00	0.00	0.00	0.00
cycles	0.50	0.50	0.50	0.50	0.50	0.50	4.00	4.00	4.00	4.00	12.00	12.00	12.00	0.00	0.00	0.00

Execution ports to units layout:

P0: ALU
P1: ALU
P2: ALU
P3: ALU, BRU
P4: ALU, BRU
P5: ALU, BRU
P6 (512 bits): store address, load
P7 (512 bits): store address, load
P8 (512 bits): store address, load
P9 (512 bits): store address, load
P10 (512 bits): VPU, DIV/SQRT
P11 (512 bits): VPU, DIV/SQRT
P12 (512 bits): VPU
P13 (512 bits): VPU
P14 (512 bits): FP store data
P15 (512 bits): FP store data

Cycles executing div or sqrt instructions	NA
Longest recurrence chain latency (RecMII)	16.00

Cycles summary

Front-end	8.00
Dispatch	12.00
Data deps.	16.00
Overall L1	16.00

Vectorization ratios

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

Vector efficiency ratios

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

Cycles and memory resources usage

Assuming all data fit into the L1 cache, each iteration of the binary loop takes 16.00 cycles. At this rate:

25% of peak load performance is reached (64.00 out of 256.00 bytes loaded per cycle (GB/s @ 1GHz))

Front-end bottlenecks

Found no such bottlenecks.

ASM code

In the binary file, the address of the loop is: 4a6b6f

Instruction	Nb FU	P0	P1	P2	P3	P4	P5	P6	P7	P8	P9	P10	P11	P12	Latency	Recip. throughput	Vectorization
VMOVUPD (%RCX),%ZMM3	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	3	0.50	vect (100.0%)
VMOVUPD 0x40(%RCX),%ZMM15	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	3	0.50	vect (100.0%)
VMOVUPD 0x80(%RCX),%ZMM14	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	3	0.50	vect (100.0%)
VMOVUPD (%R10),%ZMM12	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	3	0.50	vect (100.0%)
VMOVUPD 0x40(%R10),%ZMM13	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	3	0.50	vect (100.0%)
ADD $0x100,%R10	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	1	0.17	N/A
ADD $0x300,%RCX	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	1	0.17	N/A
VMOVAPD %ZMM3,%ZMM4	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	vect (100.0%)
VMOVAPD %ZMM3,%ZMM5	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	vect (100.0%)
VPERMT2PD %ZMM15,%ZMM7,%ZMM3	1	0	0	0	0	0	0	0	0	0	0	0	0.50	0.50	5	0.50	vect (100.0%)
VPERMT2PD %ZMM15,%ZMM11,%ZMM4	1	0	0	0	0	0	0	0	0	0	0	0	0.50	0.50	5	0.50	vect (100.0%)
VPERMT2PD %ZMM14,%ZMM6,%ZMM3	1	0	0	0	0	0	0	0	0	0	0	0	0.50	0.50	5	0.50	vect (100.0%)
VPERMT2PD %ZMM15,%ZMM9,%ZMM5	1	0	0	0	0	0	0	0	0	0	0	0	0.50	0.50	5	0.50	vect (100.0%)
VMOVUPD -0x1c0(%RCX),%ZMM15	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	3	0.50	vect (100.0%)
VFMADD231PD %ZMM12,%ZMM3,%ZMM0	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	0	4	0.50	vect (100.0%)
VPERMT2PD %ZMM14,%ZMM10,%ZMM4	1	0	0	0	0	0	0	0	0	0	0	0	0.50	0.50	5	0.50	vect (100.0%)
VMOVUPD -0x200(%RCX),%ZMM3	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	3	0.50	vect (100.0%)
VPERMT2PD %ZMM14,%ZMM8,%ZMM5	1	0	0	0	0	0	0	0	0	0	0	0	0.50	0.50	5	0.50	vect (100.0%)
VFMADD231PD %ZMM12,%ZMM4,%ZMM1	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	0	4	0.50	vect (100.0%)
VMOVUPD -0x240(%RCX),%ZMM4	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	3	0.50	vect (100.0%)
VMOVUPD -0x100(%RCX),%ZMM14	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	3	0.50	vect (100.0%)
VFMADD132PD %ZMM12,%ZMM2,%ZMM5	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	0	4	0.50	vect (100.0%)
VMOVAPD %ZMM4,%ZMM12	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	vect (100.0%)
VMOVAPD %ZMM4,%ZMM2	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	vect (100.0%)
VPERMT2PD %ZMM3,%ZMM7,%ZMM4	1	0	0	0	0	0	0	0	0	0	0	0	0.50	0.50	5	0.50	vect (100.0%)
VPERMT2PD %ZMM3,%ZMM11,%ZMM12	1	0	0	0	0	0	0	0	0	0	0	0	0.50	0.50	5	0.50	vect (100.0%)
VPERMT2PD %ZMM3,%ZMM9,%ZMM2	1	0	0	0	0	0	0	0	0	0	0	0	0.50	0.50	5	0.50	vect (100.0%)
VPERMT2PD %ZMM15,%ZMM6,%ZMM4	1	0	0	0	0	0	0	0	0	0	0	0	0.50	0.50	5	0.50	vect (100.0%)
VMOVUPD -0x180(%RCX),%ZMM3	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	3	0.50	vect (100.0%)
VFMADD132PD %ZMM13,%ZMM0,%ZMM4	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	0	4	0.50	vect (100.0%)
VMOVUPD -0x140(%RCX),%ZMM0	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	3	0.50	vect (100.0%)
VPERMT2PD %ZMM15,%ZMM10,%ZMM12	1	0	0	0	0	0	0	0	0	0	0	0	0.50	0.50	5	0.50	vect (100.0%)
VPERMT2PD %ZMM15,%ZMM8,%ZMM2	1	0	0	0	0	0	0	0	0	0	0	0	0.50	0.50	5	0.50	vect (100.0%)
VFMADD132PD %ZMM13,%ZMM1,%ZMM12	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	0	4	0.50	vect (100.0%)
VFMADD132PD %ZMM13,%ZMM5,%ZMM2	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	0	4	0.50	vect (100.0%)
VMOVUPD -0x80(%R10),%ZMM13	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	3	0.50	vect (100.0%)
VMOVAPD %ZMM3,%ZMM1	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	vect (100.0%)
VMOVAPD %ZMM3,%ZMM5	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	vect (100.0%)
VPERMT2PD %ZMM0,%ZMM9,%ZMM1	1	0	0	0	0	0	0	0	0	0	0	0	0.50	0.50	5	0.50	vect (100.0%)
VPERMT2PD %ZMM0,%ZMM7,%ZMM3	1	0	0	0	0	0	0	0	0	0	0	0	0.50	0.50	5	0.50	vect (100.0%)
VPERMT2PD %ZMM0,%ZMM11,%ZMM5	1	0	0	0	0	0	0	0	0	0	0	0	0.50	0.50	5	0.50	vect (100.0%)
VMOVUPD -0xc0(%RCX),%ZMM0	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	3	0.50	vect (100.0%)
VPERMT2PD %ZMM14,%ZMM8,%ZMM1	1	0	0	0	0	0	0	0	0	0	0	0	0.50	0.50	5	0.50	vect (100.0%)
VPERMT2PD %ZMM14,%ZMM6,%ZMM3	1	0	0	0	0	0	0	0	0	0	0	0	0.50	0.50	5	0.50	vect (100.0%)
VPERMT2PD %ZMM14,%ZMM10,%ZMM5	1	0	0	0	0	0	0	0	0	0	0	0	0.50	0.50	5	0.50	vect (100.0%)
VFMADD132PD %ZMM13,%ZMM4,%ZMM3	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	0	4	0.50	vect (100.0%)
VMOVUPD -0x80(%RCX),%ZMM4	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	3	0.50	vect (100.0%)
VFMADD132PD %ZMM13,%ZMM12,%ZMM5	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	0	4	0.50	vect (100.0%)
VMOVAPD %ZMM1,%ZMM15	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	vect (100.0%)
VFMADD132PD %ZMM13,%ZMM2,%ZMM15	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	0	4	0.50	vect (100.0%)
VMOVUPD -0x40(%RCX),%ZMM13	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	3	0.50	vect (100.0%)
VMOVUPD -0x40(%R10),%ZMM12	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	3	0.50	vect (100.0%)
VMOVAPD %ZMM0,%ZMM1	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	vect (100.0%)
VMOVAPD %ZMM0,%ZMM2	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	vect (100.0%)
VPERMT2PD %ZMM4,%ZMM11,%ZMM1	1	0	0	0	0	0	0	0	0	0	0	0	0.50	0.50	5	0.50	vect (100.0%)
VPERMT2PD %ZMM4,%ZMM9,%ZMM2	1	0	0	0	0	0	0	0	0	0	0	0	0.50	0.50	5	0.50	vect (100.0%)
VPERMT2PD %ZMM4,%ZMM7,%ZMM0	1	0	0	0	0	0	0	0	0	0	0	0	0.50	0.50	5	0.50	vect (100.0%)
VPERMT2PD %ZMM13,%ZMM10,%ZMM1	1	0	0	0	0	0	0	0	0	0	0	0	0.50	0.50	5	0.50	vect (100.0%)
VPERMT2PD %ZMM13,%ZMM8,%ZMM2	1	0	0	0	0	0	0	0	0	0	0	0	0.50	0.50	5	0.50	vect (100.0%)
VPERMT2PD %ZMM13,%ZMM6,%ZMM0	1	0	0	0	0	0	0	0	0	0	0	0	0.50	0.50	5	0.50	vect (100.0%)
VFMADD132PD %ZMM12,%ZMM3,%ZMM0	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	0	4	0.50	vect (100.0%)
VFMADD132PD %ZMM12,%ZMM5,%ZMM1	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	0	4	0.50	vect (100.0%)
VFMADD132PD %ZMM12,%ZMM15,%ZMM2	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	0	4	0.50	vect (100.0%)
CMP %R9,%R10	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	1	0.17	N/A
JNE 4a6b6f <_ZN16miniqmcreference19DiracDeterminantRefIN11qmcplusplus13DelayedUpdateIddEEE9ratioGradERNS1_11ParticleSetEiRNS1_10TinyVectorIdLj3EEE+0x4bf>	1	0	0	0	0.33	0.33	0.33	0	0	0	0	0	0	0	1	0.50-1	N/A

Report Configuration

Vectorization

Details

Execution units bottlenecks

FMA

Slow data structures access

Details

Workaround

Vector unaligned load/store instructions

Details

Workaround

Type of elements and instruction set

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

Execution units bottlenecks

FMA

Slow data structures access

Details

Workaround

Vector unaligned load/store instructions

Details

Workaround

Type of elements and instruction set

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