OV - exec - Function round

	Function: round	Module: exec	Source: :0-0	Coverage (incl. loops): 0.24% \| (excl. loops): 0.24%

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

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

0x506ad0 ENDBR64

0x506ad4 MOV	$0x59bac0,%RAX

0x506adb JMP	(%RAX)

0x506add NOPL	(%RAX)

Coverage (%)	Name	Source Location	Module
►46.50+	qmcplusplus::SoaDistanceTableA[...]	ParticleBConds3DSoa.h:289	exec
○	_ZN11qmcplusplus11ParticleSet6[...]	ParticleSet.cpp:242	exec
○	qmcplusplus::NonLocalPP<double[...]	NonLocalPP.hpp:134	exec
○	main.extracted.107	NewTimer.h:249	exec
○	__kmp_invoke_microtask		libiomp5.so
○	__kmp_invoke_task_func		libiomp5.so
○	__kmp_launch_thread		libiomp5.so
○	_INTERNALea951ae6::__kmp_launc[...]		libiomp5.so
○	start_thread		libc.so.6
○	__GI___clone3		libc.so.6
►3.62+	void qmcplusplus::DTD_BConds<d[...]	ParticleBConds3DSoa.h:247	exec
○	qmcplusplus::SoaDistanceTableA[...]	SoaDistanceTableAAOMPTarget.h:275	exec
○	_ZN11qmcplusplus11ParticleSet2[...]	ParticleSet.cpp:343	exec
○	main.extracted.107	refwrap.h:338	exec
○	__kmp_invoke_microtask		libiomp5.so
○	__kmp_invoke_task_func		libiomp5.so
○	__kmp_launch_thread		libiomp5.so
○	_INTERNALea951ae6::__kmp_launc[...]		libiomp5.so
○	start_thread		libc.so.6
○	__GI___clone3		libc.so.6
►3.43+	void qmcplusplus::DTD_BConds<d[...]	ParticleBConds3DSoa.h:247	exec
○	qmcplusplus::SoaDistanceTableA[...]	SoaDistanceTableAAOMPTarget.h:275	exec
○	_ZN11qmcplusplus11ParticleSet2[...]	ParticleSet.cpp:343	exec
○	main.extracted.107	refwrap.h:338	exec
○	__kmp_invoke_microtask		libiomp5.so
○	__kmp_invoke_task_func		libiomp5.so
○	__kmp_launch_thread		libiomp5.so
○	_INTERNALea951ae6::__kmp_launc[...]		libiomp5.so
○	start_thread		libc.so.6
○	__GI___clone3		libc.so.6
►3.39+	void qmcplusplus::DTD_BConds<d[...]	ParticleBConds3DSoa.h:247	exec
○	qmcplusplus::SoaDistanceTableA[...]	SoaDistanceTableAAOMPTarget.h:283	exec
○	_ZN11qmcplusplus11ParticleSet2[...]	ParticleSet.cpp:343	exec
○	main.extracted.107	refwrap.h:338	exec
○	__kmp_invoke_microtask		libiomp5.so
○	__kmp_invoke_task_func		libiomp5.so
○	__kmp_launch_thread		libiomp5.so
○	_INTERNALea951ae6::__kmp_launc[...]		libiomp5.so
○	start_thread		libc.so.6
○	__GI___clone3		libc.so.6
►3.33+	void qmcplusplus::DTD_BConds<d[...]	ParticleBConds3DSoa.h:247	exec
○	qmcplusplus::SoaDistanceTableA[...]	SoaDistanceTableAAOMPTarget.h:283	exec
○	_ZN11qmcplusplus11ParticleSet2[...]	ParticleSet.cpp:343	exec
○	main.extracted.107	refwrap.h:338	exec
○	__kmp_invoke_microtask		libiomp5.so
○	__kmp_invoke_task_func		libiomp5.so
○	__kmp_launch_thread		libiomp5.so
○	_INTERNALea951ae6::__kmp_launc[...]		libiomp5.so
○	start_thread		libc.so.6
○	__GI___clone3		libc.so.6
►2.92+	void qmcplusplus::DTD_BConds<d[...]	ParticleBConds3DSoa.h:248	exec
○	qmcplusplus::SoaDistanceTableA[...]	SoaDistanceTableAAOMPTarget.h:283	exec
○	_ZN11qmcplusplus11ParticleSet2[...]	ParticleSet.cpp:343	exec
○	main.extracted.107	refwrap.h:338	exec
○	__kmp_invoke_microtask		libiomp5.so
○	__kmp_invoke_task_func		libiomp5.so
○	__kmp_launch_thread		libiomp5.so
○	_INTERNALea951ae6::__kmp_launc[...]		libiomp5.so
○	start_thread		libc.so.6
○	__GI___clone3		libc.so.6
►2.87+	void qmcplusplus::DTD_BConds<d[...]	ParticleBConds3DSoa.h:248	exec
○	qmcplusplus::SoaDistanceTableA[...]	SoaDistanceTableAAOMPTarget.h:275	exec
○	_ZN11qmcplusplus11ParticleSet2[...]	ParticleSet.cpp:343	exec
○	main.extracted.107	refwrap.h:338	exec
○	__kmp_invoke_microtask		libiomp5.so
○	__kmp_invoke_task_func		libiomp5.so
○	__kmp_launch_thread		libiomp5.so
○	_INTERNALea951ae6::__kmp_launc[...]		libiomp5.so
○	start_thread		libc.so.6
○	__GI___clone3		libc.so.6
►2.57+	void qmcplusplus::DTD_BConds<d[...]	ParticleBConds3DSoa.h:247	exec
○	qmcplusplus::SoaDistanceTableA[...]	SoaDistanceTableAAOMPTarget.h:283	exec
○	_ZN11qmcplusplus11ParticleSet2[...]	ParticleSet.cpp:343	exec
○	main.extracted.107	refwrap.h:338	exec
○	__kmp_invoke_microtask		libiomp5.so
○	__kmp_invoke_task_func		libiomp5.so
○	__kmp_launch_thread		libiomp5.so
○	_INTERNALea951ae6::__kmp_launc[...]		libiomp5.so
○	start_thread		libc.so.6
○	__GI___clone3		libc.so.6
►2.52+	void qmcplusplus::DTD_BConds<d[...]	ParticleBConds3DSoa.h:247	exec
○	qmcplusplus::SoaDistanceTableA[...]	SoaDistanceTableAAOMPTarget.h:275	exec
○	_ZN11qmcplusplus11ParticleSet2[...]	ParticleSet.cpp:343	exec
○	main.extracted.107	refwrap.h:338	exec
○	__kmp_invoke_microtask		libiomp5.so
○	__kmp_invoke_task_func		libiomp5.so
○	__kmp_launch_thread		libiomp5.so
○	_INTERNALea951ae6::__kmp_launc[...]		libiomp5.so
○	start_thread		libc.so.6
○	__GI___clone3		libc.so.6
►2.09+	void qmcplusplus::DTD_BConds<d[...]	ParticleBConds3DSoa.h:246	exec
○	qmcplusplus::SoaDistanceTableA[...]	SoaDistanceTableAAOMPTarget.h:275	exec
○	_ZN11qmcplusplus11ParticleSet2[...]	ParticleSet.cpp:343	exec
○	main.extracted.107	refwrap.h:338	exec
○	__kmp_invoke_microtask		libiomp5.so
○	__kmp_invoke_task_func		libiomp5.so
○	__kmp_launch_thread		libiomp5.so
○	_INTERNALea951ae6::__kmp_launc[...]		libiomp5.so
○	start_thread		libc.so.6
○	__GI___clone3		libc.so.6
►2.08+	void qmcplusplus::DTD_BConds<d[...]	ParticleBConds3DSoa.h:246	exec
○	qmcplusplus::SoaDistanceTableA[...]	SoaDistanceTableAAOMPTarget.h:283	exec
○	_ZN11qmcplusplus11ParticleSet2[...]	ParticleSet.cpp:343	exec
○	main.extracted.107	refwrap.h:338	exec
○	__kmp_invoke_microtask		libiomp5.so
○	__kmp_invoke_task_func		libiomp5.so
○	__kmp_launch_thread		libiomp5.so
○	_INTERNALea951ae6::__kmp_launc[...]		libiomp5.so
○	start_thread		libc.so.6
○	__GI___clone3		libc.so.6
►2.02+	void qmcplusplus::DTD_BConds<d[...]	ParticleBConds3DSoa.h:246	exec
○	qmcplusplus::SoaDistanceTableA[...]	SoaDistanceTableAAOMPTarget.h:283	exec
○	_ZN11qmcplusplus11ParticleSet2[...]	ParticleSet.cpp:343	exec
○	main.extracted.107	refwrap.h:338	exec
○	__kmp_invoke_microtask		libiomp5.so
○	__kmp_invoke_task_func		libiomp5.so
○	__kmp_launch_thread		libiomp5.so
○	_INTERNALea951ae6::__kmp_launc[...]		libiomp5.so
○	start_thread		libc.so.6
○	__GI___clone3		libc.so.6
►1.98+	void qmcplusplus::DTD_BConds<d[...]	ParticleBConds3DSoa.h:246	exec
○	qmcplusplus::SoaDistanceTableA[...]	SoaDistanceTableAAOMPTarget.h:275	exec
○	_ZN11qmcplusplus11ParticleSet2[...]	ParticleSet.cpp:343	exec
○	main.extracted.107	refwrap.h:338	exec
○	__kmp_invoke_microtask		libiomp5.so
○	__kmp_invoke_task_func		libiomp5.so
○	__kmp_launch_thread		libiomp5.so
○	_INTERNALea951ae6::__kmp_launc[...]		libiomp5.so
○	start_thread		libc.so.6
○	__GI___clone3		libc.so.6
►1.98+	void qmcplusplus::DTD_BConds<d[...]	ParticleBConds3DSoa.h:246	exec
○	qmcplusplus::SoaDistanceTableA[...]	SoaDistanceTableAAOMPTarget.h:275	exec
○	_ZN11qmcplusplus11ParticleSet2[...]	ParticleSet.cpp:343	exec
○	main.extracted.107	refwrap.h:338	exec
○	__kmp_invoke_microtask		libiomp5.so
○	__kmp_invoke_task_func		libiomp5.so
○	__kmp_launch_thread		libiomp5.so
○	_INTERNALea951ae6::__kmp_launc[...]		libiomp5.so
○	start_thread		libc.so.6
○	__GI___clone3		libc.so.6
►1.87+	void qmcplusplus::DTD_BConds<d[...]	ParticleBConds3DSoa.h:246	exec
○	qmcplusplus::SoaDistanceTableA[...]	SoaDistanceTableAAOMPTarget.h:283	exec
○	_ZN11qmcplusplus11ParticleSet2[...]	ParticleSet.cpp:343	exec
○	main.extracted.107	refwrap.h:338	exec
○	__kmp_invoke_microtask		libiomp5.so
○	__kmp_invoke_task_func		libiomp5.so
○	__kmp_launch_thread		libiomp5.so
○	_INTERNALea951ae6::__kmp_launc[...]		libiomp5.so
○	start_thread		libc.so.6
○	__GI___clone3		libc.so.6
►1.46+	qmcplusplus::SoaDistanceTableA[...]	ParticleBConds3DSoa.h:289	exec
○	_ZN11qmcplusplus11ParticleSet6[...]	ParticleSet.cpp:242	exec
○	qmcplusplus::NonLocalPP<double[...]	NonLocalPP.hpp:134	exec
○	main.extracted.107	NewTimer.h:249	exec
○	__kmp_invoke_microtask		libiomp5.so
○	__kmp_invoke_task_func		libiomp5.so
○	__kmp_fork_call		libiomp5.so
○	__kmpc_fork_call		libiomp5.so
○	main	miniqmc.cpp:411	exec
○	__libc_start_call_main		libc.so.6
○	__libc_start_main		libc.so.6
○	_start	stl_uninitialized.h:99	exec
►1.23+	void qmcplusplus::DTD_BConds<d[...]	ParticleBConds3DSoa.h:248	exec
○	qmcplusplus::SoaDistanceTableA[...]	SoaDistanceTableAAOMPTarget.h:275	exec
○	_ZN11qmcplusplus11ParticleSet2[...]	ParticleSet.cpp:343	exec
○	main.extracted.107	refwrap.h:338	exec
○	__kmp_invoke_microtask		libiomp5.so
○	__kmp_invoke_task_func		libiomp5.so
○	__kmp_launch_thread		libiomp5.so
○	_INTERNALea951ae6::__kmp_launc[...]		libiomp5.so
○	start_thread		libc.so.6
○	__GI___clone3		libc.so.6
►1.06+	void qmcplusplus::DTD_BConds<d[...]	ParticleBConds3DSoa.h:248	exec
○	qmcplusplus::SoaDistanceTableA[...]	SoaDistanceTableAAOMPTarget.h:283	exec
○	_ZN11qmcplusplus11ParticleSet2[...]	ParticleSet.cpp:343	exec
○	main.extracted.107	refwrap.h:338	exec
○	__kmp_invoke_microtask		libiomp5.so
○	__kmp_invoke_task_func		libiomp5.so
○	__kmp_launch_thread		libiomp5.so
○	_INTERNALea951ae6::__kmp_launc[...]		libiomp5.so
○	start_thread		libc.so.6
○	__GI___clone3		libc.so.6
►1.02+	void qmcplusplus::DTD_BConds<d[...]	ParticleBConds3DSoa.h:247	exec
○	qmcplusplus::SoaDistanceTableA[...]	SoaDistanceTableAAOMPTarget.h:283	exec
○	_ZN11qmcplusplus11ParticleSet2[...]	ParticleSet.cpp:343	exec
○	main.extracted.107	refwrap.h:338	exec
○	__kmp_invoke_microtask		libiomp5.so
○	__kmp_invoke_task_func		libiomp5.so
○	__kmp_launch_thread		libiomp5.so
○	_INTERNALea951ae6::__kmp_launc[...]		libiomp5.so
○	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 /

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

The code analyzed by CQA in that panel excludes loops and represents 0.24% of application time for run icx_3

Source file and lines
Module	exec

gain
potential
hint
expert

Vectorization

Your function is not vectorized. 16 data elements could be processed at once in vector registers. By vectorizing your function, you can lower the cost of an iteration from 0.38 to 0.02 cycles (16.00x speedup).

Details

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

Workaround

Try another compiler or update/tune your current one
Make array accesses unit-stride:
- If your function streams arrays of structures (AoS), try to use structures of arrays instead (SoA)

Execution units bottlenecks

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

No data for this section

Complex instructions

Detected COMPLEX INSTRUCTIONS.

Details

These instructions generate more than one micro-operation and only one of them can be decoded during a cycle and the extra micro-operations increase pressure on execution units.

JMP: 1 occurrences►

Type of elements and instruction set

No instructions are processing arithmetic or math operations on FP elements. This function is probably writing/copying data or processing integer elements.

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

The binary function does not contain any FP arithmetical operations. The binary function is loading 8 bytes.

General properties

nb instructions	3
nb uops	3
loop length	13
used x86 registers	1
used mmx registers	0
used xmm registers	0
used ymm registers	0
used zmm registers	0
nb stack references	0

Front-end

MACRO FUSION NOT POSSIBLE FIT IN UOP CACHE

micro-operation queue	0.38 cycles
front end	0.38 cycles

Back-end

	P0	P1	P2	P3	P4	P5	P6	P7	P8	P9	P10	P11	P12	P13	P14	P15
uops	0.33	0.33	0.33	0.33	0.33	0.33	0.25	0.25	0.25	0.25	0.00	0.00	0.00	0.00	0.00	0.00
cycles	0.33	0.33	0.33	0.33	0.33	0.33	0.25	0.25	0.25	0.25	0.00	0.00	0.00	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

Cycles summary

Front-end	0.38
Dispatch	0.33
Overall L1	0.38

Vectorization ratios

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%

Vector efficiency ratios

all	6%
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	6%

Cycles and memory resources usage

Assuming all data fit into the L1 cache, each call to the function takes 0.38 cycles. At this rate:

8% of peak load performance is reached (21.33 out of 256.00 bytes loaded per cycle (GB/s @ 1GHz))

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 0.38 to 0.33 cycles (1.13x speedup).

ASM code

In the binary file, the address of the function is: 506ad0

Instruction	Nb FU	P0	P1	P2	P3	P4	P5	P6	P7	P8	P9	P10	P11	P12	P13	P14	P15	Latency	Recip. throughput	Vectorization
ENDBR64																				N/A
MOV $0x59bac0,%RAX	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	0	1	0.17	scal (6.3%)
JMP (%RAX)	2	0	0	0	0.33	0.33	0.33	0.25	0.25	0.25	0.25	0	0	0	0	0	0	0	1	N/A

The code analyzed by CQA in that panel excludes loops and represents 0.24% of application time for run icx_3

Source file and lines
Module	exec

gain
potential
hint
expert

Vectorization

Details

Workaround

Try another compiler or update/tune your current one
Make array accesses unit-stride:
- If your function streams arrays of structures (AoS), try to use structures of arrays instead (SoA)

Execution units bottlenecks

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

No data for this section

Complex instructions

Detected COMPLEX INSTRUCTIONS.

Details

These instructions generate more than one micro-operation and only one of them can be decoded during a cycle and the extra micro-operations increase pressure on execution units.

JMP: 1 occurrences►

Type of elements and instruction set

No instructions are processing arithmetic or math operations on FP elements. This function is probably writing/copying data or processing integer elements.

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

The binary function does not contain any FP arithmetical operations. The binary function is loading 8 bytes.

General properties

nb instructions	3
nb uops	3
loop length	13
used x86 registers	1
used mmx registers	0
used xmm registers	0
used ymm registers	0
used zmm registers	0
nb stack references	0

Front-end

MACRO FUSION NOT POSSIBLE FIT IN UOP CACHE

micro-operation queue	0.38 cycles
front end	0.38 cycles

Back-end

	P0	P1	P2	P3	P4	P5	P6	P7	P8	P9	P10	P11	P12	P13	P14	P15
uops	0.33	0.33	0.33	0.33	0.33	0.33	0.25	0.25	0.25	0.25	0.00	0.00	0.00	0.00	0.00	0.00
cycles	0.33	0.33	0.33	0.33	0.33	0.33	0.25	0.25	0.25	0.25	0.00	0.00	0.00	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

Cycles summary

Front-end	0.38
Dispatch	0.33
Overall L1	0.38

Vectorization ratios

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%

Vector efficiency ratios

all	6%
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	6%

Cycles and memory resources usage

Assuming all data fit into the L1 cache, each call to the function takes 0.38 cycles. At this rate:

8% of peak load performance is reached (21.33 out of 256.00 bytes loaded per cycle (GB/s @ 1GHz))

Front-end bottlenecks

ASM code

In the binary file, the address of the function is: 506ad0

Instruction	Nb FU	P0	P1	P2	P3	P4	P5	P6	P7	P8	P9	P10	P11	P12	P13	P14	P15	Latency	Recip. throughput	Vectorization
ENDBR64																				N/A
MOV $0x59bac0,%RAX	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	0	1	0.17	scal (6.3%)
JMP (%RAX)	2	0	0	0	0.33	0.33	0.33	0.25	0.25	0.25	0.25	0	0	0	0	0	0	0	1	N/A

Name	Coverage (%)	Time (s)
○round	0.24	0.40

Report Configuration

Vectorization

Details

Workaround

Execution units bottlenecks

Complex instructions

Details

Type of elements and instruction set

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

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

Workaround

Execution units bottlenecks

Complex instructions

Details

Type of elements and instruction set

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

General properties

Front-end

Back-end

Cycles summary

Vectorization ratios

Vector efficiency ratios

Cycles and memory resources usage

Front-end bottlenecks

ASM code