OV - exec - Loop 90

0x417d3c ORR	X6, XZR, X1

0x417d40 STR	Q0, [X0, #32]    [3]

0x417d44 ADD	X14, X0, #336

0x417d48 STP	Q0, Q0, [X0]    [3]

0x417d4c STR	Q0, [X6], #16    [1]

0x417d50 ADD	X1, X1, #128

0x417d54 STP	Q0, Q0, [X0, #48]    [3]

0x417d58 STR	Q0, [X0, #80]    [3]

0x417d5c STUR	Q0, [X1, #400]    [5]

0x417d60 STP	Q0, Q0, [X0, #96]    [3]

0x417d64 STR	Q0, [X0, #128]    [3]

0x417d68 STR	Q0, [X6, #16]    [1]

0x417d6c STP	Q0, Q0, [X0, #144]    [3]

0x417d70 STR	Q0, [X0, #176]    [3]

0x417d74 STUR	Q0, [X1, #432]    [5]

0x417d78 STP	Q0, Q0, [X0, #192]    [3]

0x417d7c STR	Q0, [X0, #224]    [3]

0x417d80 STUR	Q0, [X1, #448]    [5]

0x417d84 STP	Q0, Q0, [X0, #240]    [3]

0x417d88 STR	Q0, [X0, #272]    [3]

0x417d8c STUR	Q0, [X1, #464]    [5]

0x417d90 STP	Q0, Q0, [X0, #288]    [3]

0x417d94 STR	Q0, [X0, #320]    [3]

0x417d98 ADD	X0, X0, #384

0x417d9c STUR	Q0, [X1, #480]    [5]

0x417da0 STUR	Q0, [X0, #464]    [2]

0x417da4 STP	Q0, Q0, [X14, #16]    [4]

0x417da8 STUR	Q0, [X1, #496]    [5]

0x417dac CMP	X11, X0

0x417db0 B.NE	417d3c

/home/eoseret/qaas/qaas_runs/178-176-0594/intel/CoMD/build/CoMD/CoMD/src-openmp/mytype.h: 22 - 24

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

22:    a[0] = 0.0;

23:    a[1] = 0.0;

24:    a[2] = 0.0;

/home/eoseret/qaas/qaas_runs/178-176-0594/intel/CoMD/build/CoMD/CoMD/src-openmp/ljForce.c: 161 - 161

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

161:       s->atoms->U[ii] = 0.;

Coverage (%)	Name	Source Location	Module
►99.01+	GOMP_parallel		libgomp.so.1.0.0
○	ljForce	ljForce.c:164	exec
○	timestep	timestep.c:51	exec
○	main	CoMD.c:125	exec
○	__libc_start_call_main		libc.so.6
○	__libc_start_main		libc.so.6
○	_start	CoMD.c:266	exec

Coverage (%)	Name	Source Location	Module
►50.73+	omp_fulfill_event		libgomp.so.1.0.0
○	start_thread		libc.so.6
○	thread_start		libc.so.6
►48.78+	GOMP_parallel		libgomp.so.1.0.0
○	ljForce	ljForce.c:164	exec
○	timestep	timestep.c:51	exec
○	main	CoMD.c:125	exec
○	__libc_start_call_main		libc.so.6
○	__libc_start_main		libc.so.6
○	_start	CoMD.c:266	exec

Coverage (%)	Name	Source Location	Module
►72.35+	omp_fulfill_event		libgomp.so.1.0.0
○	start_thread		libc.so.6
○	thread_start		libc.so.6
►27.19+	GOMP_parallel		libgomp.so.1.0.0
○	ljForce	ljForce.c:164	exec
○	timestep	timestep.c:51	exec
○	main	CoMD.c:125	exec
○	__libc_start_call_main		libc.so.6
○	__libc_start_main		libc.so.6
○	_start	CoMD.c:266	exec

Coverage (%)	Name	Source Location	Module
►84.86+	omp_fulfill_event		libgomp.so.1.0.0
○	start_thread		libc.so.6
○	thread_start		libc.so.6
►15.14+	GOMP_parallel		libgomp.so.1.0.0
○	ljForce	ljForce.c:164	exec
○	timestep	timestep.c:51	exec
○	main	CoMD.c:125	exec
○	__libc_start_call_main		libc.so.6
○	__libc_start_main		libc.so.6
○	_start	CoMD.c:266	exec

Coverage (%)	Name	Source Location	Module
►93.27+	omp_fulfill_event		libgomp.so.1.0.0
○	start_thread		libc.so.6
○	thread_start		libc.so.6
►6.73+	GOMP_parallel		libgomp.so.1.0.0
○	ljForce	ljForce.c:164	exec
○	timestep	timestep.c:51	exec
○	main	CoMD.c:125	exec
○	__libc_start_call_main		libc.so.6
○	__libc_start_main		libc.so.6
○	_start	CoMD.c:266	exec

Coverage (%)	Name	Source Location	Module
►94.88+	omp_fulfill_event		libgomp.so.1.0.0
○	start_thread		libc.so.6
○	thread_start		libc.so.6
►5.12+	GOMP_parallel		libgomp.so.1.0.0
○	ljForce	ljForce.c:164	exec
○	timestep	timestep.c:51	exec
○	main	CoMD.c:125	exec
○	__libc_start_call_main		libc.so.6
○	__libc_start_main		libc.so.6
○	_start	CoMD.c:266	exec

Coverage (%)	Name	Source Location	Module
►97.43+	omp_fulfill_event		libgomp.so.1.0.0
○	start_thread		libc.so.6
○	thread_start		libc.so.6
►2.57+	GOMP_parallel		libgomp.so.1.0.0
○	ljForce	ljForce.c:164	exec
○	timestep	timestep.c:51	exec
○	main	CoMD.c:125	exec
○	__libc_start_call_main		libc.so.6
○	__libc_start_main		libc.so.6
○	_start	CoMD.c:266	exec

Coverage (%)	Name	Source Location	Module
►96.74+	omp_fulfill_event		libgomp.so.1.0.0
○	start_thread		libc.so.6
○	thread_start		libc.so.6
►3.20+	GOMP_parallel		libgomp.so.1.0.0
○	ljForce	ljForce.c:164	exec
○	timestep	timestep.c:51	exec
○	main	CoMD.c:125	exec
○	__libc_start_call_main		libc.so.6
○	__libc_start_main		libc.so.6
○	_start	CoMD.c:266	exec

Coverage (%)	Name	Source Location	Module
►98.04+	omp_fulfill_event		libgomp.so.1.0.0
○	start_thread		libc.so.6
○	thread_start		libc.so.6
►1.96+	GOMP_parallel		libgomp.so.1.0.0
○	ljForce	ljForce.c:164	exec
○	timestep	timestep.c:51	exec
○	main	CoMD.c:125	exec
○	__libc_start_call_main		libc.so.6
○	__libc_start_main		libc.so.6
○	_start	CoMD.c:266	exec

Coverage (%)	Name	Source Location	Module
►98.61+	omp_fulfill_event		libgomp.so.1.0.0
○	start_thread		libc.so.6
○	thread_start		libc.so.6
►1.39+	GOMP_parallel		libgomp.so.1.0.0
○	ljForce	ljForce.c:164	exec
○	timestep	timestep.c:51	exec
○	main	CoMD.c:125	exec
○	__libc_start_call_main		libc.so.6
○	__libc_start_main		libc.so.6
○	_start	CoMD.c:266	exec

Coverage (%)	Name	Source Location	Module
►98.45+	omp_fulfill_event		libgomp.so.1.0.0
○	start_thread		libc.so.6
○	thread_start		libc.so.6
►1.55+	GOMP_parallel		libgomp.so.1.0.0
○	ljForce	ljForce.c:164	exec
○	timestep	timestep.c:51	exec
○	main	CoMD.c:125	exec
○	__libc_start_call_main		libc.so.6
○	__libc_start_main		libc.so.6
○	_start	CoMD.c:266	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	1.50
CQA speedup if no inter-iteration dependency	NA
CQA speedup if next bottleneck killed	3.20
Bottlenecks	P6, P7, P10, P11,
Function	ljForce._omp_fn.0
Source	mytype.h:22-24,ljForce.c:161-161
Source loop unroll info	multi-versionned
Source loop unroll confidence level	NA
Unroll/vectorization loop type	NA
Unroll factor	NA
CQA cycles	12.00
CQA cycles if no scalar integer	12.00
CQA cycles if FP arith vectorized	12.00
CQA cycles if fully vectorized	8.00
Front-end cycles	3.75
P0 cycles	0.50
P1 cycles	0.50
P2 cycles	1.25
P3 cycles	1.25
P4 cycles	1.25
P5 cycles	1.25
P6 cycles	12.00
P7 cycles	12.00
P8 cycles	0.00
P9 cycles	0.00
P10 cycles	12.00
P11 cycles	12.00
P12 cycles	0.00
P13 cycles	0.00
P14 cycles	0.00
DIV/SQRT cycles	0.00
Inter-iter dependencies cycles	1
FE+BE cycles (UFS)	NA
Stall cycles (UFS)	NA
Nb insns	30.00
Nb uops	30.00
Nb loads	NA
Nb stores	24.00
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	0.00
Stride 1	0.00
Stride n	3.00
Stride unknown	2.00
Stride indirect	0.00
Vectorization ratio all	100.00
Vectorization ratio load	NA
Vectorization ratio store	100.00
Vectorization ratio mul	NA
Vectorization ratio add_sub	NA
Vectorization ratio fma	NA
Vectorization ratio div_sqrt	NA
Vectorization ratio other	NA
Vector-efficiency ratio all	66.67
Vector-efficiency ratio load	NA
Vector-efficiency ratio store	66.67
Vector-efficiency ratio mul	NA
Vector-efficiency ratio add_sub	NA
Vector-efficiency ratio fma	NA
Vector-efficiency ratio div_sqrt	NA
Vector-efficiency ratio other	NA

Metric	Value
CQA speedup if no scalar integer	1.00
CQA speedup if FP arith vectorized	1.00
CQA speedup if fully vectorized	1.50
CQA speedup if no inter-iteration dependency	NA
CQA speedup if next bottleneck killed	3.20
Bottlenecks	P6, P7, P10, P11,
Function	ljForce._omp_fn.0
Source	mytype.h:22-24,ljForce.c:161-161
Source loop unroll info	multi-versionned
Source loop unroll confidence level	NA
Unroll/vectorization loop type	NA
Unroll factor	NA
CQA cycles	12.00
CQA cycles if no scalar integer	12.00
CQA cycles if FP arith vectorized	12.00
CQA cycles if fully vectorized	8.00
Front-end cycles	3.75
P0 cycles	0.50
P1 cycles	0.50
P2 cycles	1.25
P3 cycles	1.25
P4 cycles	1.25
P5 cycles	1.25
P6 cycles	12.00
P7 cycles	12.00
P8 cycles	0.00
P9 cycles	0.00
P10 cycles	12.00
P11 cycles	12.00
P12 cycles	0.00
P13 cycles	0.00
P14 cycles	0.00
DIV/SQRT cycles	0.00
Inter-iter dependencies cycles	1
FE+BE cycles (UFS)	NA
Stall cycles (UFS)	NA
Nb insns	30.00
Nb uops	30.00
Nb loads	NA
Nb stores	24.00
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	0.00
Stride 1	0.00
Stride n	3.00
Stride unknown	2.00
Stride indirect	0.00
Vectorization ratio all	100.00
Vectorization ratio load	NA
Vectorization ratio store	100.00
Vectorization ratio mul	NA
Vectorization ratio add_sub	NA
Vectorization ratio fma	NA
Vectorization ratio div_sqrt	NA
Vectorization ratio other	NA
Vector-efficiency ratio all	66.67
Vector-efficiency ratio load	NA
Vector-efficiency ratio store	66.67
Vector-efficiency ratio mul	NA
Vector-efficiency ratio add_sub	NA
Vector-efficiency ratio fma	NA
Vector-efficiency ratio div_sqrt	NA
Vector-efficiency ratio other	NA

Path /

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

Function	ljForce._omp_fn.0
Source file and lines	ljForce.c:161-161
Module	exec

The loop is defined in:

/home/eoseret/qaas/qaas_runs/178-176-0594/intel/CoMD/build/CoMD/CoMD/src-openmp/mytype.h:22-24
/home/eoseret/qaas/qaas_runs/178-176-0594/intel/CoMD/build/CoMD/CoMD/src-openmp/ljForce.c:161

The related source loop is multi-versionned.

gain
potential
hint
expert

Vectorization

Your loop is vectorized, but using 66% register length (average across all VPU instructions). By fully vectorizing your loop, you can lower the cost of an iteration from 12.00 to 8.00 cycles (1.50x speedup).

Details

All VPU instructions are used in vector version (process two or more data elements in vector registers). Since your execution units are vector units, only a fully vectorized loop can use their full power.

No data for this section

Slow data structures access

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

Details

Constant unknown stride: 2 occurrence(s)
Constant non-unit stride: 3 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 does not contain any FP arithmetical operations. The binary loop does not load or store any data.

General properties

nb instructions	30
nb uops	30
loop length	120
used w registers	0
used x registers	6
used b registers	0
used h registers	0
used s registers	0
used d registers	0
used q registers	1
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	3.75 cycles
front end	3.75 cycles

Back-end

	P0	P1	P2	P3	P4	P5	P6	P7	P8	P9	P10	P11	P12	P13	P14
uops	0.50	0.50	1.25	1.25	1.25	1.25	12.00	12.00	0.00	0.00	12.00	12.00	0.00	0.00	0.00
cycles	0.50	0.50	1.25	1.25	1.25	1.25	12.00	12.00	0.00	0.00	12.00	12.00	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	NA
Longest recurrence chain latency (RecMII)	1.00

Cycles summary

Front-end	3.75
Dispatch	12.00
Data deps.	1.00
Overall L1	12.00

Vectorization ratios

all	100%
load	NA (no load vectorizable/vectorized instructions)
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)
div/sqrt	NA (no div/sqrt vectorizable/vectorized instructions)
other	NA (no other vectorizable/vectorized instructions)

Vector efficiency ratios

all	66%
load	NA (no load vectorizable/vectorized instructions)
store	66%
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	NA (no other vectorizable/vectorized instructions)

Cycles and memory resources usage

Assuming all data fit into the L1 cache, each iteration of the binary loop takes 12.00 cycles.

Front-end bottlenecks

Found no such bottlenecks.

ASM code

In the binary file, the address of the loop is: 417d3c

Instruction	Nb FU	P0	P1	P2	P3	P4	P5	P6	P7	P10	P11	Latency	Recip. throughput	Vectorization
ORR X6, XZR, X1	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	1	0.25	N/A
STR Q0, [X0, #32]	1	0	0	0	0	0	0	0.50	0.50	0.50	0.50	2	0.50	vect (50.0%)
ADD X14, X0, #336	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	1	0.25	N/A
STP Q0, Q0, [X0]	1	0	0	0	0	0	0	0.50	0.50	0.50	0.50	2	0.50	vect (100.0%)
STR Q0, [X6], #16	1	0	0	0	0	0	0	0.50	0.50	0.50	0.50	2	0.50	vect (50.0%)
ADD X1, X1, #128	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	1	0.25	N/A
STP Q0, Q0, [X0, #48]	1	0	0	0	0	0	0	0.50	0.50	0.50	0.50	2	0.50	vect (100.0%)
STR Q0, [X0, #80]	1	0	0	0	0	0	0	0.50	0.50	0.50	0.50	2	0.50	vect (50.0%)
STUR Q0, [X1, #400]	1	0	0	0	0	0	0	0.50	0.50	0.50	0.50	2	0.50	vect (50.0%)
STP Q0, Q0, [X0, #96]	1	0	0	0	0	0	0	0.50	0.50	0.50	0.50	2	0.50	vect (100.0%)
STR Q0, [X0, #128]	1	0	0	0	0	0	0	0.50	0.50	0.50	0.50	2	0.50	vect (50.0%)
STR Q0, [X6, #16]	1	0	0	0	0	0	0	0.50	0.50	0.50	0.50	2	0.50	vect (50.0%)
STP Q0, Q0, [X0, #144]	1	0	0	0	0	0	0	0.50	0.50	0.50	0.50	2	0.50	vect (100.0%)
STR Q0, [X0, #176]	1	0	0	0	0	0	0	0.50	0.50	0.50	0.50	2	0.50	vect (50.0%)
STUR Q0, [X1, #432]	1	0	0	0	0	0	0	0.50	0.50	0.50	0.50	2	0.50	vect (50.0%)
STP Q0, Q0, [X0, #192]	1	0	0	0	0	0	0	0.50	0.50	0.50	0.50	2	0.50	vect (100.0%)
STR Q0, [X0, #224]	1	0	0	0	0	0	0	0.50	0.50	0.50	0.50	2	0.50	vect (50.0%)
STUR Q0, [X1, #448]	1	0	0	0	0	0	0	0.50	0.50	0.50	0.50	2	0.50	vect (50.0%)
STP Q0, Q0, [X0, #240]	1	0	0	0	0	0	0	0.50	0.50	0.50	0.50	2	0.50	vect (100.0%)
STR Q0, [X0, #272]	1	0	0	0	0	0	0	0.50	0.50	0.50	0.50	2	0.50	vect (50.0%)
STUR Q0, [X1, #464]	1	0	0	0	0	0	0	0.50	0.50	0.50	0.50	2	0.50	vect (50.0%)
STP Q0, Q0, [X0, #288]	1	0	0	0	0	0	0	0.50	0.50	0.50	0.50	2	0.50	vect (100.0%)
STR Q0, [X0, #320]	1	0	0	0	0	0	0	0.50	0.50	0.50	0.50	2	0.50	vect (50.0%)
ADD X0, X0, #384	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	1	0.25	N/A
STUR Q0, [X1, #480]	1	0	0	0	0	0	0	0.50	0.50	0.50	0.50	2	0.50	vect (50.0%)
STUR Q0, [X0, #464]	1	0	0	0	0	0	0	0.50	0.50	0.50	0.50	2	0.50	vect (50.0%)
STP Q0, Q0, [X14, #16]	1	0	0	0	0	0	0	0.50	0.50	0.50	0.50	2	0.50	vect (100.0%)
STUR Q0, [X1, #496]	1	0	0	0	0	0	0	0.50	0.50	0.50	0.50	2	0.50	vect (50.0%)
CMP X11, X0	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	1	0.33	N/A
B.NE 417d3c <ljForce._omp_fn.0+0x17c>	1	0.50	0.50	0	0	0	0	0	0	0	0	1	0.50	N/A

Function	ljForce._omp_fn.0
Source file and lines	ljForce.c:161-161
Module	exec

The loop is defined in:

/home/eoseret/qaas/qaas_runs/178-176-0594/intel/CoMD/build/CoMD/CoMD/src-openmp/mytype.h:22-24
/home/eoseret/qaas/qaas_runs/178-176-0594/intel/CoMD/build/CoMD/CoMD/src-openmp/ljForce.c:161

The related source loop is multi-versionned.

gain
potential
hint
expert

Vectorization

Your loop is vectorized, but using 66% register length (average across all VPU instructions). By fully vectorizing your loop, you can lower the cost of an iteration from 12.00 to 8.00 cycles (1.50x speedup).

Details

All VPU instructions are used in vector version (process two or more data elements in vector registers). Since your execution units are vector units, only a fully vectorized loop can use their full power.

No data for this section

Slow data structures access

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

Details

Constant unknown stride: 2 occurrence(s)
Constant non-unit stride: 3 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 does not contain any FP arithmetical operations. The binary loop does not load or store any data.

General properties

nb instructions	30
nb uops	30
loop length	120
used w registers	0
used x registers	6
used b registers	0
used h registers	0
used s registers	0
used d registers	0
used q registers	1
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	3.75 cycles
front end	3.75 cycles

Back-end

	P0	P1	P2	P3	P4	P5	P6	P7	P8	P9	P10	P11	P12	P13	P14
uops	0.50	0.50	1.25	1.25	1.25	1.25	12.00	12.00	0.00	0.00	12.00	12.00	0.00	0.00	0.00
cycles	0.50	0.50	1.25	1.25	1.25	1.25	12.00	12.00	0.00	0.00	12.00	12.00	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	NA
Longest recurrence chain latency (RecMII)	1.00

Cycles summary

Front-end	3.75
Dispatch	12.00
Data deps.	1.00
Overall L1	12.00

Vectorization ratios

all	100%
load	NA (no load vectorizable/vectorized instructions)
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)
div/sqrt	NA (no div/sqrt vectorizable/vectorized instructions)
other	NA (no other vectorizable/vectorized instructions)

Vector efficiency ratios

all	66%
load	NA (no load vectorizable/vectorized instructions)
store	66%
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	NA (no other vectorizable/vectorized instructions)

Cycles and memory resources usage

Assuming all data fit into the L1 cache, each iteration of the binary loop takes 12.00 cycles.

Front-end bottlenecks

Found no such bottlenecks.

ASM code

In the binary file, the address of the loop is: 417d3c

Instruction	Nb FU	P0	P1	P2	P3	P4	P5	P6	P7	P10	P11	Latency	Recip. throughput	Vectorization
ORR X6, XZR, X1	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	1	0.25	N/A
STR Q0, [X0, #32]	1	0	0	0	0	0	0	0.50	0.50	0.50	0.50	2	0.50	vect (50.0%)
ADD X14, X0, #336	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	1	0.25	N/A
STP Q0, Q0, [X0]	1	0	0	0	0	0	0	0.50	0.50	0.50	0.50	2	0.50	vect (100.0%)
STR Q0, [X6], #16	1	0	0	0	0	0	0	0.50	0.50	0.50	0.50	2	0.50	vect (50.0%)
ADD X1, X1, #128	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	1	0.25	N/A
STP Q0, Q0, [X0, #48]	1	0	0	0	0	0	0	0.50	0.50	0.50	0.50	2	0.50	vect (100.0%)
STR Q0, [X0, #80]	1	0	0	0	0	0	0	0.50	0.50	0.50	0.50	2	0.50	vect (50.0%)
STUR Q0, [X1, #400]	1	0	0	0	0	0	0	0.50	0.50	0.50	0.50	2	0.50	vect (50.0%)
STP Q0, Q0, [X0, #96]	1	0	0	0	0	0	0	0.50	0.50	0.50	0.50	2	0.50	vect (100.0%)
STR Q0, [X0, #128]	1	0	0	0	0	0	0	0.50	0.50	0.50	0.50	2	0.50	vect (50.0%)
STR Q0, [X6, #16]	1	0	0	0	0	0	0	0.50	0.50	0.50	0.50	2	0.50	vect (50.0%)
STP Q0, Q0, [X0, #144]	1	0	0	0	0	0	0	0.50	0.50	0.50	0.50	2	0.50	vect (100.0%)
STR Q0, [X0, #176]	1	0	0	0	0	0	0	0.50	0.50	0.50	0.50	2	0.50	vect (50.0%)
STUR Q0, [X1, #432]	1	0	0	0	0	0	0	0.50	0.50	0.50	0.50	2	0.50	vect (50.0%)
STP Q0, Q0, [X0, #192]	1	0	0	0	0	0	0	0.50	0.50	0.50	0.50	2	0.50	vect (100.0%)
STR Q0, [X0, #224]	1	0	0	0	0	0	0	0.50	0.50	0.50	0.50	2	0.50	vect (50.0%)
STUR Q0, [X1, #448]	1	0	0	0	0	0	0	0.50	0.50	0.50	0.50	2	0.50	vect (50.0%)
STP Q0, Q0, [X0, #240]	1	0	0	0	0	0	0	0.50	0.50	0.50	0.50	2	0.50	vect (100.0%)
STR Q0, [X0, #272]	1	0	0	0	0	0	0	0.50	0.50	0.50	0.50	2	0.50	vect (50.0%)
STUR Q0, [X1, #464]	1	0	0	0	0	0	0	0.50	0.50	0.50	0.50	2	0.50	vect (50.0%)
STP Q0, Q0, [X0, #288]	1	0	0	0	0	0	0	0.50	0.50	0.50	0.50	2	0.50	vect (100.0%)
STR Q0, [X0, #320]	1	0	0	0	0	0	0	0.50	0.50	0.50	0.50	2	0.50	vect (50.0%)
ADD X0, X0, #384	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	1	0.25	N/A
STUR Q0, [X1, #480]	1	0	0	0	0	0	0	0.50	0.50	0.50	0.50	2	0.50	vect (50.0%)
STUR Q0, [X0, #464]	1	0	0	0	0	0	0	0.50	0.50	0.50	0.50	2	0.50	vect (50.0%)
STP Q0, Q0, [X14, #16]	1	0	0	0	0	0	0	0.50	0.50	0.50	0.50	2	0.50	vect (100.0%)
STUR Q0, [X1, #496]	1	0	0	0	0	0	0	0.50	0.50	0.50	0.50	2	0.50	vect (50.0%)
CMP X11, X0	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	1	0.33	N/A
B.NE 417d3c <ljForce._omp_fn.0+0x17c>	1	0.50	0.50	0	0	0	0	0	0	0	0	1	0.50	N/A

▶Scalability Runs Description

Run 1x1	Number processes: 1Number nodes: NARun Command: <executable> -x 100 -y 100 -z 100MPI Command: mpirun -n <number_processes> --bind-to core --map-by package:PE=64 --rank-by fill --report-bindings Dataset: Run Directory: /home/eoseret/qaas/qaas_runs/178-176-0594/intel/CoMD/run/oneview_runs/multicore/gcc/oneview_run_1781767694OMP_PROC_BIND: spreadOMP_DISPLAY_AFFINITY: TRUEOMP_AFFINITY_FORMAT: 'OMP: pid %P tid %i thread %n bound to OS proc set {%A}'OMP_DISPLAY_ENV: TRUEOMP_NUM_THREADS: 1OMP_PLACES: threads
Run 1x2	Number processes: 1Run Command: <executable> -x 100 -y 100 -z 100MPI Command: mpirun -n <number_processes> --bind-to core --map-by package:PE=64 --rank-by fill --report-bindings Dataset: Run Directory: /home/eoseret/qaas/qaas_runs/178-176-0594/intel/CoMD/run/oneview_runs/multicore/gcc/oneview_run_1781767694OMP_NUM_THREADS: 2OMP_PROC_BIND: spreadOMP_DISPLAY_AFFINITY: TRUEOMP_AFFINITY_FORMAT: 'OMP: pid %P tid %i thread %n bound to OS proc set {%A}'OMP_DISPLAY_ENV: TRUEOMP_PLACES: threads
Run 1x4	Number processes: 1Run Command: <executable> -x 100 -y 100 -z 100MPI Command: mpirun -n <number_processes> --bind-to core --map-by package:PE=64 --rank-by fill --report-bindings Dataset: Run Directory: /home/eoseret/qaas/qaas_runs/178-176-0594/intel/CoMD/run/oneview_runs/multicore/gcc/oneview_run_1781767694OMP_NUM_THREADS: 4OMP_PROC_BIND: spreadOMP_DISPLAY_AFFINITY: TRUEOMP_AFFINITY_FORMAT: 'OMP: pid %P tid %i thread %n bound to OS proc set {%A}'OMP_DISPLAY_ENV: TRUEOMP_PLACES: threads
Run 1x8	Number processes: 1Run Command: <executable> -x 100 -y 100 -z 100MPI Command: mpirun -n <number_processes> --bind-to core --map-by package:PE=64 --rank-by fill --report-bindings Dataset: Run Directory: /home/eoseret/qaas/qaas_runs/178-176-0594/intel/CoMD/run/oneview_runs/multicore/gcc/oneview_run_1781767694OMP_NUM_THREADS: 8OMP_PROC_BIND: spreadOMP_DISPLAY_AFFINITY: TRUEOMP_AFFINITY_FORMAT: 'OMP: pid %P tid %i thread %n bound to OS proc set {%A}'OMP_DISPLAY_ENV: TRUEOMP_PLACES: threads
Run 1x16	Number processes: 1Run Command: <executable> -x 100 -y 100 -z 100MPI Command: mpirun -n <number_processes> --bind-to core --map-by package:PE=64 --rank-by fill --report-bindings Dataset: Run Directory: /home/eoseret/qaas/qaas_runs/178-176-0594/intel/CoMD/run/oneview_runs/multicore/gcc/oneview_run_1781767694OMP_NUM_THREADS: 16OMP_PROC_BIND: spreadOMP_DISPLAY_AFFINITY: TRUEOMP_AFFINITY_FORMAT: 'OMP: pid %P tid %i thread %n bound to OS proc set {%A}'OMP_DISPLAY_ENV: TRUEOMP_PLACES: threads
Run 1x24	Number processes: 1Run Command: <executable> -x 100 -y 100 -z 100MPI Command: mpirun -n <number_processes> --bind-to core --map-by package:PE=64 --rank-by fill --report-bindings Dataset: Run Directory: /home/eoseret/qaas/qaas_runs/178-176-0594/intel/CoMD/run/oneview_runs/multicore/gcc/oneview_run_1781767694OMP_NUM_THREADS: 24OMP_PROC_BIND: spreadOMP_DISPLAY_AFFINITY: TRUEOMP_AFFINITY_FORMAT: 'OMP: pid %P tid %i thread %n bound to OS proc set {%A}'OMP_DISPLAY_ENV: TRUEOMP_PLACES: threads
Run 1x32	Number processes: 1Run Command: <executable> -x 100 -y 100 -z 100MPI Command: mpirun -n <number_processes> --bind-to core --map-by package:PE=64 --rank-by fill --report-bindings Dataset: Run Directory: /home/eoseret/qaas/qaas_runs/178-176-0594/intel/CoMD/run/oneview_runs/multicore/gcc/oneview_run_1781767694OMP_NUM_THREADS: 32OMP_PROC_BIND: spreadOMP_DISPLAY_AFFINITY: TRUEOMP_AFFINITY_FORMAT: 'OMP: pid %P tid %i thread %n bound to OS proc set {%A}'OMP_DISPLAY_ENV: TRUEOMP_PLACES: threads
Run 1x40	Number processes: 1Run Command: <executable> -x 100 -y 100 -z 100MPI Command: mpirun -n <number_processes> --bind-to core --map-by package:PE=64 --rank-by fill --report-bindings Dataset: Run Directory: /home/eoseret/qaas/qaas_runs/178-176-0594/intel/CoMD/run/oneview_runs/multicore/gcc/oneview_run_1781767694OMP_NUM_THREADS: 40OMP_PROC_BIND: spreadOMP_DISPLAY_AFFINITY: TRUEOMP_AFFINITY_FORMAT: 'OMP: pid %P tid %i thread %n bound to OS proc set {%A}'OMP_DISPLAY_ENV: TRUEOMP_PLACES: threads
Run 1x48	Number processes: 1Run Command: <executable> -x 100 -y 100 -z 100MPI Command: mpirun -n <number_processes> --bind-to core --map-by package:PE=64 --rank-by fill --report-bindings Dataset: Run Directory: /home/eoseret/qaas/qaas_runs/178-176-0594/intel/CoMD/run/oneview_runs/multicore/gcc/oneview_run_1781767694OMP_NUM_THREADS: 48OMP_PROC_BIND: spreadOMP_DISPLAY_AFFINITY: TRUEOMP_AFFINITY_FORMAT: 'OMP: pid %P tid %i thread %n bound to OS proc set {%A}'OMP_DISPLAY_ENV: TRUEOMP_PLACES: threads
Run 1x56	Number processes: 1Run Command: <executable> -x 100 -y 100 -z 100MPI Command: mpirun -n <number_processes> --bind-to core --map-by package:PE=64 --rank-by fill --report-bindings Dataset: Run Directory: /home/eoseret/qaas/qaas_runs/178-176-0594/intel/CoMD/run/oneview_runs/multicore/gcc/oneview_run_1781767694OMP_NUM_THREADS: 56OMP_PROC_BIND: spreadOMP_DISPLAY_AFFINITY: TRUEOMP_AFFINITY_FORMAT: 'OMP: pid %P tid %i thread %n bound to OS proc set {%A}'OMP_DISPLAY_ENV: TRUEOMP_PLACES: threads
Run 1x64	Number processes: 1Run Command: <executable> -x 100 -y 100 -z 100MPI Command: mpirun -n <number_processes> --bind-to core --map-by package:PE=64 --rank-by fill --report-bindings Dataset: Run Directory: /home/eoseret/qaas/qaas_runs/178-176-0594/intel/CoMD/run/oneview_runs/multicore/gcc/oneview_run_1781767694OMP_NUM_THREADS: 64OMP_PROC_BIND: spreadOMP_DISPLAY_AFFINITY: TRUEOMP_AFFINITY_FORMAT: 'OMP: pid %P tid %i thread %n bound to OS proc set {%A}'OMP_DISPLAY_ENV: TRUEOMP_PLACES: threads

(1x1) Efficiency	(1x1) Potential Speed-Up (%)	(1x2) Efficiency	(1x2) Potential Speed-Up (%)	(1x4) Efficiency	(1x4) Potential Speed-Up (%)	(1x8) Efficiency	(1x8) Potential Speed-Up (%)	(1x16) Efficiency	(1x16) Potential Speed-Up (%)	(1x24) Efficiency	(1x24) Potential Speed-Up (%)	(1x32) Efficiency	(1x32) Potential Speed-Up (%)	(1x40) Efficiency	(1x40) Potential Speed-Up (%)	(1x48) Efficiency	(1x48) Potential Speed-Up (%)	(1x56) Efficiency	(1x56) Potential Speed-Up (%)	(1x64) Efficiency	(1x64) Potential Speed-Up (%)
1	0	0.98	0	0.91	0.01	0.55	0.12	0.26	0.39	0.17	0.64	0.13	0.88	0.1	1.13	0.08	1.32	0.07	1.59	0.06	1.79

Speed-Up and Efficiency

▶Detailed Speed-Up and Efficiency

Run	Number of threads	Efficiency (ideal is 1)	Speedup	Ideal Speedup	Time (s)	Coverage (%)
1x1	1	1	1	1	1.0149999856949	0.155657351017
1x2	2	0.98	1.97	2	0.51999998092651	0.15692861378193
1x4	4	0.91	3.66	4	0.30000001192093	0.16591142117977
1x8	8	0.55	4.39	8	0.26499998569489	0.26527082920074
1x16	16	0.26	4.14	16	0.25499999523163	0.52505600452423
1x24	24	0.17	4.02	24	0.26500001549721	0.77234607934952
1x32	32	0.13	4.09	32	0.25999999046326	1.0109637975693
1x40	40	0.1	3.91	40	0.28000000119209	1.2555636167526
1x48	48	0.08	3.93	48	0.25499999523163	1.4428601264954
1x56	56	0.07	3.71	56	0.28999999165535	1.7081357240677
1x64	64	0.06	3.65	64	0.27000001072884	1.8985509872437

Report Configuration

Vectorization

Details

Slow data structures access

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

Vectorization

Details

Slow data structures access

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

▶Scalability Runs Description

▼Columns Filter

Speed-Up and Efficiency

▶Detailed Speed-Up and Efficiency