OV - exec - Function qmcplusplus::TimerType<std::chrono::_V2::system

	Function: qmcplusplus::TimerType<std::chrono::_V2::system_clock>::start()	Module: exec	Source: NewTimer.cpp:37-81 [...]	Coverage (incl. loops): 0.03% \| (excl. loops): 0.03%

/home/hbollore/qaas/qaas-runs/174-135-6342/intel/miniqmc/build/miniqmc/src/Utilities/NewTimer.h: 90 - 99

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

90:     short_buckets[level] = c1;

91:     if (level >= max_level - 1)

92:     {

93:       timer_max_level_exceeded = true;

94:     }

95:     else

96:     {

97:       level++;

98:     }

99:   }

/opt/arm/gcc-14.2.0_AmazonLinux-2023/include/c++/14.2.0/bits/stl_vector.h: 993 - 993

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

993:       { return size_type(this->_M_impl._M_finish - this->_M_impl._M_start); }

/home/hbollore/qaas/qaas-runs/174-135-6342/intel/miniqmc/build/miniqmc/src/Utilities/NewTimer.cpp: 37 - 81

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

37: void TimerType<CLOCK>::start()

38: {

39:   if (active)

[...]

53:     for (int level = omp_get_level(); level > 0; level--)

54:       if (omp_get_ancestor_thread_num(level) != 0)

55:         is_true_master = false;

56:     if (is_true_master)

57:     {

58:       if (manager)

59:       {

60:         // compute current_stack_key

61:         TimerType* parent = manager->current_timer();

62:         if (parent)

63:         {

64:           current_stack_key = parent->get_stack_key();

65:           current_stack_key.add_id(timer_id);

66:         }

67:         else

68:         {

69:           current_stack_key = StackKey();

70:           current_stack_key.add_id(timer_id);

71:         }

72:

73:         manager->push_timer(this);

74:       }

75:       start_time = CLOCK::now();

[...]

81: }

/home/hbollore/qaas/qaas-runs/174-135-6342/intel/miniqmc/build/miniqmc/src/Utilities/TimerManager.h: 92 - 93

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

92:     if (CurrentTimerStack.size() > 0)

93:       current = CurrentTimerStack.back();

0x4d5540 STP	X29, X30, [SP, #976]!

0x4d5544 ADD	X29, SP, #0

0x4d5548 STP	X19, X20, [SP, #16]

0x4d554c LDRB	W20, [X0, #56]

0x4d5550 TBNZ	W20, #0, 4d5560

0x4d5554 LDP	X19, X20, [SP, #16]

0x4d5558 LDP	X29, X30, [SP], #48

0x4d555c RET

0x4d5560 STP	X21, X22, [SP, #32]

0x4d5564 ORR	X22, XZR, X0

0x4d5568 BL	404400

0x4d556c ORR	W19, WZR, W0

0x4d5570 CMP	W0, #0

0x4d5574 B.LE	4d5720

0x4d5578 ANDS	W1, W0, #128

0x4d557c SUB	W21, W0, #1

0x4d5580 B.EQ	4d5648

0x4d5584 CMP	W1, #1

0x4d5588 B.EQ	4d562c

0x4d558c CMP	W1, #2

0x4d5590 B.EQ	4d5614

0x4d5594 CMP	W1, #3

0x4d5598 B.EQ	4d55fc

0x4d559c CMP	W1, #4

0x4d55a0 B.EQ	4d55e4

0x4d55a4 CMP	W1, #5

0x4d55a8 B.EQ	4d55cc

0x4d55ac CMP	W1, #6

0x4d55b0 B.NE	4d5788

(2620) 0x4d55b4 ORR	W0, WZR, W19

(2620) 0x4d55b8 SUB	W19, W19, #1

(2620) 0x4d55bc BL	404140

(2620) 0x4d55c0 CMP	W0, #0

(2620) 0x4d55c4 CCMP	W20, #0, #4, #0

(2620) 0x4d55c8 CSINC	W20, WZR, WZR, #0

(2620) 0x4d55cc ORR	W0, WZR, W19

(2620) 0x4d55d0 SUB	W19, W19, #1

(2620) 0x4d55d4 BL	404140

(2620) 0x4d55d8 CMP	W0, #0

(2620) 0x4d55dc CCMP	W20, #0, #4, #0

(2620) 0x4d55e0 CSINC	W20, WZR, WZR, #0

(2620) 0x4d55e4 ORR	W0, WZR, W19

(2620) 0x4d55e8 SUB	W19, W19, #1

(2620) 0x4d55ec BL	404140

(2620) 0x4d55f0 CMP	W0, #0

(2620) 0x4d55f4 CCMP	W20, #0, #4, #0

(2620) 0x4d55f8 CSINC	W20, WZR, WZR, #0

(2620) 0x4d55fc ORR	W0, WZR, W19

(2620) 0x4d5600 SUB	W19, W19, #1

(2620) 0x4d5604 BL	404140

(2620) 0x4d5608 CMP	W0, #0

(2620) 0x4d560c CCMP	W20, #0, #4, #0

(2620) 0x4d5610 CSINC	W20, WZR, WZR, #0

(2620) 0x4d5614 ORR	W0, WZR, W19

(2620) 0x4d5618 SUB	W19, W19, #1

(2620) 0x4d561c BL	404140

(2620) 0x4d5620 CMP	W0, #0

(2620) 0x4d5624 CCMP	W20, #0, #4, #0

(2620) 0x4d5628 CSINC	W20, WZR, WZR, #0

(2620) 0x4d562c ORR	W0, WZR, W19

(2620) 0x4d5630 BL	404140

(2620) 0x4d5634 CMP	W0, #0

(2620) 0x4d5638 CCMP	W20, #0, #4, #0

(2620) 0x4d563c CSINC	W20, WZR, WZR, #0

(2620) 0x4d5640 SUBS	W19, W19, #1

(2620) 0x4d5644 B.EQ	4d570c

  (2621) 0x4d5648 ORR	W0, WZR, W19

  (2621) 0x4d564c SUB	W21, W19, #1

  (2621) 0x4d5650 BL	404140

  (2621) 0x4d5654 CMP	W0, #0

  (2621) 0x4d5658 ORR	W0, WZR, W21

  (2621) 0x4d565c CCMP	W20, #0, #4, #0

  (2621) 0x4d5660 CSINC	W20, WZR, WZR, #0

  (2621) 0x4d5664 BL	404140

  (2621) 0x4d5668 ORR	W2, WZR, W0

  (2621) 0x4d566c SUB	W0, W21, #1

  (2621) 0x4d5670 CMP	W2, #0

  (2621) 0x4d5674 CCMP	W20, #0, #4, #0

  (2621) 0x4d5678 CSINC	W21, WZR, WZR, #0

  (2621) 0x4d567c BL	404140

  (2621) 0x4d5680 ORR	W3, WZR, W0

  (2621) 0x4d5684 SUB	W0, W19, #3

  (2621) 0x4d5688 CMP	W3, #0

  (2621) 0x4d568c CCMP	W21, #0, #4, #0

  (2621) 0x4d5690 CSINC	W20, WZR, WZR, #0

  (2621) 0x4d5694 BL	404140

  (2621) 0x4d5698 ORR	W4, WZR, W0

  (2621) 0x4d569c SUB	W0, W19, #4

  (2621) 0x4d56a0 CMP	W4, #0

  (2621) 0x4d56a4 CCMP	W20, #0, #4, #0

  (2621) 0x4d56a8 CSINC	W21, WZR, WZR, #0

  (2621) 0x4d56ac BL	404140

  (2621) 0x4d56b0 ORR	W5, WZR, W0

  (2621) 0x4d56b4 SUB	W0, W19, #5

  (2621) 0x4d56b8 CMP	W5, #0

  (2621) 0x4d56bc CCMP	W21, #0, #4, #0

  (2621) 0x4d56c0 CSINC	W20, WZR, WZR, #0

  (2621) 0x4d56c4 BL	404140

  (2621) 0x4d56c8 ORR	W6, WZR, W0

  (2621) 0x4d56cc SUB	W0, W19, #6

  (2621) 0x4d56d0 CMP	W6, #0

  (2621) 0x4d56d4 CCMP	W20, #0, #4, #0

  (2621) 0x4d56d8 CSINC	W21, WZR, WZR, #0

  (2621) 0x4d56dc BL	404140

  (2621) 0x4d56e0 ORR	W7, WZR, W0

  (2621) 0x4d56e4 SUB	W0, W19, #7

  (2621) 0x4d56e8 CMP	W7, #0

  (2621) 0x4d56ec CCMP	W21, #0, #4, #0

  (2621) 0x4d56f0 CSINC	W20, WZR, WZR, #0

  (2621) 0x4d56f4 BL	404140

  (2621) 0x4d56f8 CMP	W0, #0

  (2621) 0x4d56fc CCMP	W20, #0, #4, #0

  (2621) 0x4d5700 CSINC	W20, WZR, WZR, #0

  (2621) 0x4d5704 SUBS	W19, W19, #8

  (2621) 0x4d5708 B.NE	4d5648

(2620) 0x4d570c TBNZ	W20, #0, 4d5720

(2620) 0x4d5710 LDP	X21, X22, [SP, #32]

(2620) 0x4d5714 LDP	X19, X20, [SP, #16]

(2620) 0x4d5718 LDP	X29, X30, [SP], #48

(2620) 0x4d571c RET

(2620) 0x4d5720 LDR	X0, [X22, #72]

(2620) 0x4d5724 CBZ	X0, 4d5770

(2620) 0x4d5728 LDP	X8, X9, [X0, #72]

(2620) 0x4d572c LDRB	W10, [X22, #64]

(2620) 0x4d5730 CMP	X8, X9

(2620) 0x4d5734 B.EQ	4d57b0

(2620) 0x4d5738 LDUR	X11, [X9, #504]

(2620) 0x4d573c CBZ	X11, 4d57b0

(2620) 0x4d5740 LDP	X14, X15, [X11, #80]

(2620) 0x4d5744 ADD	X13, X22, #80

(2620) 0x4d5748 LDR	W16, [X11, #96]

(2620) 0x4d574c STP	X14, X15, [X22, #80]

(2620) 0x4d5750 STR	W16, [X13, #16]

(2620) 0x4d5754 STRB	W10, [X13, X16,SXTW]

(2620) 0x4d5758 CMP	W16, #14

(2620) 0x4d575c B.GT	4d57a0

(2620) 0x4d5760 ADD	W15, W16, #1

(2620) 0x4d5764 STR	W15, [X13, #16]

(2620) 0x4d5768 ORR	X1, XZR, X22

(2620) 0x4d576c BL	4db300

(2620) 0x4d5770 BL	4041b0

(2620) 0x4d5774 STR	X0, [X22]

(2620) 0x4d5778 LDP	X21, X22, [SP, #32]

(2620) 0x4d577c LDP	X19, X20, [SP, #16]

(2620) 0x4d5780 LDP	X29, X30, [SP], #48

(2620) 0x4d5784 RET

(2620) 0x4d5788 BL	404140

(2620) 0x4d578c CMP	W0, #0

(2620) 0x4d5790 ORR	W19, WZR, W21

(2620) 0x4d5794 CCMP	W20, #0, #4, #0

(2620) 0x4d5798 CSINC	W20, WZR, WZR, #0

(2620) 0x4d579c B	4d55b4

(2620) 0x4d57a0 ADRP	X17,

(2620) 0x4d57a4 MOVZ	W18, #1

(2620) 0x4d57a8 STRB	W18, [X17, #1912]

(2620) 0x4d57ac B	4d5768

(2620) 0x4d57b0 MOVZ	W12, #1

(2620) 0x4d57b4 STP	XZR, XZR, [X22, #80]

(2620) 0x4d57b8 STRB	W10, [X22, #80]

(2620) 0x4d57bc STR	W12, [X22, #96]

(2620) 0x4d57c0 B	4d5768

0x4d57c4 HINT	#0

0x4d57c8 HINT	#0

0x4d57cc HINT	#0

0x4d57d0 HINT	#0

0x4d57d4 HINT	#0

0x4d57d8 HINT	#0

0x4d57dc HINT	#0

Coverage (%)	Name	Source Location	Module
►10.15+	qmcplusplus::ParticleSet::acce[...]	unique_ptr.h:193	exec
○	main._omp_fn.1	miniqmc.cpp:453	exec
○	gomp_thread_start	team.c:130	libgomp.so.1.0.0
○	start_thread		libc.so.6
○	thread_start		libc.so.6
►8.66+	qmcplusplus::SoaDistanceTableA[...]	SoaDistanceTableABOMPTarget.h:189	exec
○	qmcplusplus::ParticleSet::upda[...]	stl_vector.h:992	exec
○	main._omp_fn.1	NonLocalPP.hpp:135	exec
○	gomp_thread_start	team.c:130	libgomp.so.1.0.0
○	start_thread		libc.so.6
○	thread_start		libc.so.6
►7.55+	qmcplusplus::ParticleSet::make[...]	ParticleSet.cpp:343	exec
○	main._omp_fn.1	miniqmc.cpp:440	exec
○	gomp_thread_start	team.c:130	libgomp.so.1.0.0
○	start_thread		libc.so.6
○	thread_start		libc.so.6
►6.56+	qmcplusplus::WaveFunction::eva[...]	WaveFunction.cpp:188	exec
○	main._omp_fn.1	stl_vector.h:1131	exec
○	gomp_thread_start	team.c:130	libgomp.so.1.0.0
○	start_thread		libc.so.6
○	thread_start		libc.so.6
►5.94+	miniqmcreference::einspline_sp[...]	NewTimer.h:242	exec
○	miniqmcreference::DiracDetermi[...]	DiracDeterminantRef.cpp:100	exec
○	qmcplusplus::WaveFunction::rat[...]	WaveFunction.cpp:196	exec
○	main._omp_fn.1	stl_vector.h:1128	exec
○	gomp_thread_start	team.c:130	libgomp.so.1.0.0
○	start_thread		libc.so.6
○	thread_start		libc.so.6
►5.69+	qmcplusplus::SoaDistanceTableA[...]	NewTimer.h:242	exec
○	qmcplusplus::ParticleSet::acce[...]	ParticleSet.cpp:389	exec
○	main._omp_fn.1	miniqmc.cpp:453	exec
○	gomp_thread_start	team.c:130	libgomp.so.1.0.0
○	start_thread		libc.so.6
○	thread_start		libc.so.6
►5.07+	qmcplusplus::WaveFunction::eva[...]	WaveFunction.cpp:272	exec
○	main._omp_fn.1	NonLocalPP.hpp:126	exec
○	gomp_thread_start	team.c:130	libgomp.so.1.0.0
○	start_thread		libc.so.6
○	thread_start		libc.so.6
►4.70+	qmcplusplus::WaveFunction::rat[...]	WaveFunction.cpp:201	exec
○	main._omp_fn.1	stl_vector.h:1128	exec
○	gomp_thread_start	team.c:130	libgomp.so.1.0.0
○	start_thread		libc.so.6
○	thread_start		libc.so.6
►4.58+	qmcplusplus::SoaDistanceTableA[...]	unique_ptr.h:463	exec
○	qmcplusplus::ParticleSet::make[...]	stl_vector.h:993	exec
○	main._omp_fn.1	miniqmc.cpp:440	exec
○	gomp_thread_start	team.c:130	libgomp.so.1.0.0
○	start_thread		libc.so.6
○	thread_start		libc.so.6
►4.46+	qmcplusplus::ParticleSet::upda[...]	unique_ptr.h:193	exec
○	main._omp_fn.1	NonLocalPP.hpp:135	exec
○	gomp_thread_start	team.c:130	libgomp.so.1.0.0
○	start_thread		libc.so.6
○	thread_start		libc.so.6
►3.96+	qmcplusplus::SoaDistanceTableA[...]	SoaDistanceTableABOMPTarget.h:214	exec
○	qmcplusplus::ParticleSet::upda[...]	stl_vector.h:992	exec
○	main._omp_fn.1	NonLocalPP.hpp:135	exec
○	gomp_thread_start	team.c:130	libgomp.so.1.0.0
○	start_thread		libc.so.6
○	thread_start		libc.so.6
►3.71+	miniqmcreference::einspline_sp[...]	NewTimer.h:242	exec
○	miniqmcreference::DiracDetermi[...]	DiracDeterminantRef.cpp:100	exec
○	qmcplusplus::WaveFunction::rat[...]	WaveFunction.cpp:196	exec
○	main._omp_fn.1	stl_vector.h:1128	exec
○	gomp_thread_start	team.c:130	libgomp.so.1.0.0
○	start_thread		libc.so.6
○	thread_start		libc.so.6
►3.09+	miniqmcreference::DiracDetermi[...]	unique_ptr.h:193	exec
○	qmcplusplus::WaveFunction::rat[...]	WaveFunction.cpp:196	exec
○	main._omp_fn.1	stl_vector.h:1128	exec
○	gomp_thread_start	team.c:130	libgomp.so.1.0.0
○	start_thread		libc.so.6
○	thread_start		libc.so.6
►2.85+	miniqmcreference::DiracDetermi[...]	unique_ptr.h:193	exec
○	qmcplusplus::WaveFunction::rat[...]	WaveFunction.cpp:196	exec
○	main._omp_fn.1	stl_vector.h:1128	exec
○	gomp_thread_start	team.c:130	libgomp.so.1.0.0
○	start_thread		libc.so.6
○	thread_start		libc.so.6
►2.60+	miniqmcreference::DiracDetermi[...]	DelayedUpdate.h:128	exec
○	qmcplusplus::WaveFunction::acc[...]	WaveFunction.cpp:225	exec
○	main._omp_fn.1	refwrap.h:350	exec
○	gomp_thread_start	team.c:130	libgomp.so.1.0.0
○	start_thread		libc.so.6
○	thread_start		libc.so.6
►2.35+	miniqmcreference::DiracDetermi[...]	DiracDeterminantRef.cpp:213	exec
○	qmcplusplus::WaveFunction::eva[...]	WaveFunction.cpp:266	exec
○	main._omp_fn.1	NonLocalPP.hpp:126	exec
○	gomp_thread_start	team.c:130	libgomp.so.1.0.0
○	start_thread		libc.so.6
○	thread_start		libc.so.6
►2.35+	qmcplusplus::SoaDistanceTableA[...]	OhmmsVector.h:248	exec
○	qmcplusplus::ParticleSet::make[...]	stl_vector.h:993	exec
○	main._omp_fn.1	miniqmc.cpp:440	exec
○	gomp_thread_start	team.c:130	libgomp.so.1.0.0
○	start_thread		libc.so.6
○	thread_start		libc.so.6
►2.35+	miniqmcreference::DiracDetermi[...]	DiracDeterminantRef.cpp:213	exec
○	qmcplusplus::WaveFunction::eva[...]	stl_vector.h:993	exec
○	main._omp_fn.1	NonLocalPP.hpp:126	exec
○	gomp_thread_start	team.c:130	libgomp.so.1.0.0
○	start_thread		libc.so.6
○	thread_start		libc.so.6
►1.98+	main._omp_fn.1	TinyVector.h:61	exec
○	gomp_thread_start	team.c:130	libgomp.so.1.0.0
○	start_thread		libc.so.6
○	thread_start		libc.so.6
►1.98+	qmcplusplus::SoaDistanceTableA[...]	stl_algo.h:709	exec
○	qmcplusplus::ParticleSet::acce[...]	ParticleSet.cpp:389	exec
○	main._omp_fn.1	miniqmc.cpp:453	exec
○	gomp_thread_start	team.c:130	libgomp.so.1.0.0
○	start_thread		libc.so.6
○	thread_start		libc.so.6
►1.49+	miniqmcreference::DiracDetermi[...]	DelayedUpdate.h:128	exec
○	qmcplusplus::WaveFunction::acc[...]	WaveFunction.cpp:223	exec
○	main._omp_fn.1	refwrap.h:350	exec
○	gomp_thread_start	team.c:130	libgomp.so.1.0.0
○	start_thread		libc.so.6
○	thread_start		libc.so.6
►1.36+	miniqmcreference::einspline_sp[...]	NewTimer.h:242	exec
○	miniqmcreference::DiracDetermi[...]	OhmmsVector.h:248	exec
○	qmcplusplus::WaveFunction::eva[...]	WaveFunction.cpp:266	exec
○	main._omp_fn.1	NonLocalPP.hpp:126	exec
○	gomp_thread_start	team.c:130	libgomp.so.1.0.0
○	start_thread		libc.so.6
○	thread_start		libc.so.6
►1.11+	miniqmcreference::DiracDetermi[...]	OhmmsMatrix.h:214	exec
○	qmcplusplus::WaveFunction::eva[...]	WaveFunction.cpp:183	exec
○	main._omp_fn.1	stl_vector.h:1131	exec
○	gomp_thread_start	team.c:130	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 /

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 0.03% of application time for run gcc_0

Source file and lines	NewTimer.cpp:37-81
Module	exec

The function is defined in:

/home/hbollore/qaas/qaas-runs/174-135-6342/intel/miniqmc/build/miniqmc/src/Utilities/NewTimer.h:90-99
/opt/arm/gcc-14.2.0_AmazonLinux-2023/include/c++/14.2.0/bits/stl_vector.h:993
/home/hbollore/qaas/qaas-runs/174-135-6342/intel/miniqmc/build/miniqmc/src/Utilities/NewTimer.cpp:37-39,53-75,81
/home/hbollore/qaas/qaas-runs/174-135-6342/intel/miniqmc/build/miniqmc/src/Utilities/TimerManager.h:92-93

Warnings:
Ignoring paths for analysis

gain
potential
hint
expert

Vectorization

Your function is not vectorized. Only 50% of vector register length is used (average across all VPU instructions).

Details

All VPU instructions are used in scalar version (process only one data element in vector registers).

Expensive FP math instructions/calls

Detected performance impact from expensive FP math instructions/calls. By removing/reexpressing them, you can lower the cost of an iteration from 5.50 to 0.50 cycles (11.00x speedup).

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 33 bytes. The binary function is storing 48 bytes.

General properties

nb instructions	36
loop length	144
nb stack references	0

Front-end

FIT IN UOP CACHE

front end

3.63 cycles

Back-end

	P0	P1	P2	P3	P4	P5	P6	P7	P8	P9	P10	P11	P12	P13	P14	P15	P16
uops	5.50	5.50	2.42	2.42	2.33	2.33	2.25	2.25	0.00	0.00	0.00	0.00	2.17	1.83	2.00	1.50	1.50
cycles	5.50	5.50	2.42	2.42	2.33	2.33	2.25	2.25	0.00	0.00	0.00	0.00	2.17	1.83	2.00	1.50	1.50

Execution ports to units layout:

P0: BRU
P1: BRU
P2: ALU
P3: ALU
P4: ALU
P5: ALU
P6: ALU
P7: ALU
P8 (128 bits): VPU, FP store data, ALU, DIV/SQRT
P9 (128 bits): VPU, ALU, FP store data
P10 (128 bits): VPU, ALU, DIV/SQRT
P11 (128 bits): ALU, VPU
P12 (256 bits): store address, load
P13 (256 bits): store address, load
P14 (256 bits): load
P15 (64 bits): store data
P16 (64 bits): store data

Cycles executing div or sqrt instructions

Cycles summary

Front-end	3.63
Overall L1	5.50

Vectorization ratios

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%

Cycles and memory resources usage

Assuming all data fit into the L1 cache, each call to the function takes 5.50 cycles. At this rate:

6% of peak load performance is reached (6.00 out of 96.00 bytes loaded per cycle (GB/s @ 1GHz))
18% of peak store performance is reached (8.73 out of 48.00 bytes stored per cycle (GB/s @ 1GHz))

ASM code

In the binary file, the address of the function is: 4d5540

Instruction	Nb FU	P0	P1	P2	P3	P4	P5	P6	P7	P8	P9	P10	P11	P12	P13	P14	P15	P16	Latency	Recip. throughput	Vectorization
STP X29, X30, [SP, #976]!	1	0	0	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0.50	0.50	0	0.50	0.50	1	0.50	scal (100.0%)
ADD X29, SP, #0	1	0	0	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	1	0.17	scal (50.0%)
STP X19, X20, [SP, #16]	1	0	0	0	0	0	0	0	0	0	0	0	0	0.50	0.50	0	0.50	0.50	1	0.50	scal (100.0%)
LDRB W20, [X0, #56]	1	0	0	0	0	0	0	0	0	0	0	0	0	0.33	0.33	0.33	0	0	4	0.33	scal (6.3%)
TBNZ W20, #0, 4d5560 <_ZN11qmcplusplus9TimerTypeINSt6chrono3_V212system_clockEE5startEv+0x20>	1	0.50	0.50	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.50	N/A
LDP X19, X20, [SP, #16]	1	0	0	0	0	0	0	0	0	0	0	0	0	0.33	0.33	0.33	0	0	4	0.50	scal (100.0%)
LDP X29, X30, [SP], #48	1	0	0	0	0	0	0	0	0	0	0	0	0	0.33	0.33	0.33	0	0	4	0.50	scal (100.0%)
RET	1	0.50	0.50	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.50	N/A
STP X21, X22, [SP, #32]	1	0	0	0	0	0	0	0	0	0	0	0	0	0.50	0.50	0	0.50	0.50	1	0.50	scal (100.0%)
ORR X22, XZR, X0	1	0	0	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	1	0.17	scal (50.0%)
BL 404400 <@plt_start@+0x710>	1	0.50	0.50	0.50	0.50	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.50	N/A
ORR W19, WZR, W0	1	0	0	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	1	0.17	scal (25.0%)
CMP W0, #0	1	0	0	0.25	0.25	0	0	0.25	0.25	0	0	0	0	0	0	0	0	0	1	0.33	scal (25.0%)
B.LE 4d5720 <_ZN11qmcplusplus9TimerTypeINSt6chrono3_V212system_clockEE5startEv+0x1e0>	1	0.50	0.50	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.50	N/A
ANDS W1, W0, #128	1	0	0	0.25	0.25	0	0	0.25	0.25	0	0	0	0	0	0	0	0	0	1	0.33	N/A
SUB W21, W0, #1	1	0	0	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	1	0.17	scal (25.0%)
B.EQ 4d5648 <_ZN11qmcplusplus9TimerTypeINSt6chrono3_V212system_clockEE5startEv+0x108>	1	0.50	0.50	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.50	N/A
CMP W1, #1	1	0	0	0.25	0.25	0	0	0.25	0.25	0	0	0	0	0	0	0	0	0	1	0.33	scal (25.0%)
B.EQ 4d562c <_ZN11qmcplusplus9TimerTypeINSt6chrono3_V212system_clockEE5startEv+0xec>	1	0.50	0.50	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.50	N/A
CMP W1, #2	1	0	0	0.25	0.25	0	0	0.25	0.25	0	0	0	0	0	0	0	0	0	1	0.33	scal (25.0%)
B.EQ 4d5614 <_ZN11qmcplusplus9TimerTypeINSt6chrono3_V212system_clockEE5startEv+0xd4>	1	0.50	0.50	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.50	N/A
CMP W1, #3	1	0	0	0.25	0.25	0	0	0.25	0.25	0	0	0	0	0	0	0	0	0	1	0.33	scal (25.0%)
B.EQ 4d55fc <_ZN11qmcplusplus9TimerTypeINSt6chrono3_V212system_clockEE5startEv+0xbc>	1	0.50	0.50	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.50	N/A
CMP W1, #4	1	0	0	0.25	0.25	0	0	0.25	0.25	0	0	0	0	0	0	0	0	0	1	0.33	scal (25.0%)
B.EQ 4d55e4 <_ZN11qmcplusplus9TimerTypeINSt6chrono3_V212system_clockEE5startEv+0xa4>	1	0.50	0.50	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.50	N/A
CMP W1, #5	1	0	0	0.25	0.25	0	0	0.25	0.25	0	0	0	0	0	0	0	0	0	1	0.33	scal (25.0%)
B.EQ 4d55cc <_ZN11qmcplusplus9TimerTypeINSt6chrono3_V212system_clockEE5startEv+0x8c>	1	0.50	0.50	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.50	N/A
CMP W1, #6	1	0	0	0.25	0.25	0	0	0.25	0.25	0	0	0	0	0	0	0	0	0	1	0.33	N/A
B.NE 4d5788 <_ZN11qmcplusplus9TimerTypeINSt6chrono3_V212system_clockEE5startEv+0x248>	1	0.50	0.50	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.50	N/A
HINT #0																					N/A
HINT #0																					N/A
HINT #0																					N/A
HINT #0																					N/A
HINT #0																					N/A
HINT #0																					N/A
HINT #0																					N/A

The code analyzed by CQA in that panel excludes loops and represents 0.03% of application time for run gcc_0

Source file and lines	NewTimer.cpp:37-81
Module	exec

The function is defined in:

/home/hbollore/qaas/qaas-runs/174-135-6342/intel/miniqmc/build/miniqmc/src/Utilities/NewTimer.h:90-99
/opt/arm/gcc-14.2.0_AmazonLinux-2023/include/c++/14.2.0/bits/stl_vector.h:993
/home/hbollore/qaas/qaas-runs/174-135-6342/intel/miniqmc/build/miniqmc/src/Utilities/NewTimer.cpp:37-39,53-75,81
/home/hbollore/qaas/qaas-runs/174-135-6342/intel/miniqmc/build/miniqmc/src/Utilities/TimerManager.h:92-93

Warnings:
Ignoring paths for analysis

gain
potential
hint
expert

Vectorization

Your function is not vectorized. Only 50% of vector register length is used (average across all VPU instructions).

Details

All VPU instructions are used in scalar version (process only one data element in vector registers).

Expensive FP math instructions/calls

Detected performance impact from expensive FP math instructions/calls. By removing/reexpressing them, you can lower the cost of an iteration from 5.50 to 0.50 cycles (11.00x speedup).

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 33 bytes. The binary function is storing 48 bytes.

General properties

nb instructions	36
loop length	144
nb stack references	0

Front-end

FIT IN UOP CACHE

front end

3.63 cycles

Back-end

	P0	P1	P2	P3	P4	P5	P6	P7	P8	P9	P10	P11	P12	P13	P14	P15	P16
uops	5.50	5.50	2.42	2.42	2.33	2.33	2.25	2.25	0.00	0.00	0.00	0.00	2.17	1.83	2.00	1.50	1.50
cycles	5.50	5.50	2.42	2.42	2.33	2.33	2.25	2.25	0.00	0.00	0.00	0.00	2.17	1.83	2.00	1.50	1.50

Execution ports to units layout:

P0: BRU
P1: BRU
P2: ALU
P3: ALU
P4: ALU
P5: ALU
P6: ALU
P7: ALU
P8 (128 bits): VPU, FP store data, ALU, DIV/SQRT
P9 (128 bits): VPU, ALU, FP store data
P10 (128 bits): VPU, ALU, DIV/SQRT
P11 (128 bits): ALU, VPU
P12 (256 bits): store address, load
P13 (256 bits): store address, load
P14 (256 bits): load
P15 (64 bits): store data
P16 (64 bits): store data

Cycles executing div or sqrt instructions

Cycles summary

Front-end	3.63
Overall L1	5.50

Vectorization ratios

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%

Cycles and memory resources usage

Assuming all data fit into the L1 cache, each call to the function takes 5.50 cycles. At this rate:

6% of peak load performance is reached (6.00 out of 96.00 bytes loaded per cycle (GB/s @ 1GHz))
18% of peak store performance is reached (8.73 out of 48.00 bytes stored per cycle (GB/s @ 1GHz))

ASM code

In the binary file, the address of the function is: 4d5540

Instruction	Nb FU	P0	P1	P2	P3	P4	P5	P6	P7	P8	P9	P10	P11	P12	P13	P14	P15	P16	Latency	Recip. throughput	Vectorization
STP X29, X30, [SP, #976]!	1	0	0	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0.50	0.50	0	0.50	0.50	1	0.50	scal (100.0%)
ADD X29, SP, #0	1	0	0	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	1	0.17	scal (50.0%)
STP X19, X20, [SP, #16]	1	0	0	0	0	0	0	0	0	0	0	0	0	0.50	0.50	0	0.50	0.50	1	0.50	scal (100.0%)
LDRB W20, [X0, #56]	1	0	0	0	0	0	0	0	0	0	0	0	0	0.33	0.33	0.33	0	0	4	0.33	scal (6.3%)
TBNZ W20, #0, 4d5560 <_ZN11qmcplusplus9TimerTypeINSt6chrono3_V212system_clockEE5startEv+0x20>	1	0.50	0.50	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.50	N/A
LDP X19, X20, [SP, #16]	1	0	0	0	0	0	0	0	0	0	0	0	0	0.33	0.33	0.33	0	0	4	0.50	scal (100.0%)
LDP X29, X30, [SP], #48	1	0	0	0	0	0	0	0	0	0	0	0	0	0.33	0.33	0.33	0	0	4	0.50	scal (100.0%)
RET	1	0.50	0.50	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.50	N/A
STP X21, X22, [SP, #32]	1	0	0	0	0	0	0	0	0	0	0	0	0	0.50	0.50	0	0.50	0.50	1	0.50	scal (100.0%)
ORR X22, XZR, X0	1	0	0	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	1	0.17	scal (50.0%)
BL 404400 <@plt_start@+0x710>	1	0.50	0.50	0.50	0.50	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.50	N/A
ORR W19, WZR, W0	1	0	0	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	1	0.17	scal (25.0%)
CMP W0, #0	1	0	0	0.25	0.25	0	0	0.25	0.25	0	0	0	0	0	0	0	0	0	1	0.33	scal (25.0%)
B.LE 4d5720 <_ZN11qmcplusplus9TimerTypeINSt6chrono3_V212system_clockEE5startEv+0x1e0>	1	0.50	0.50	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.50	N/A
ANDS W1, W0, #128	1	0	0	0.25	0.25	0	0	0.25	0.25	0	0	0	0	0	0	0	0	0	1	0.33	N/A
SUB W21, W0, #1	1	0	0	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	1	0.17	scal (25.0%)
B.EQ 4d5648 <_ZN11qmcplusplus9TimerTypeINSt6chrono3_V212system_clockEE5startEv+0x108>	1	0.50	0.50	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.50	N/A
CMP W1, #1	1	0	0	0.25	0.25	0	0	0.25	0.25	0	0	0	0	0	0	0	0	0	1	0.33	scal (25.0%)
B.EQ 4d562c <_ZN11qmcplusplus9TimerTypeINSt6chrono3_V212system_clockEE5startEv+0xec>	1	0.50	0.50	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.50	N/A
CMP W1, #2	1	0	0	0.25	0.25	0	0	0.25	0.25	0	0	0	0	0	0	0	0	0	1	0.33	scal (25.0%)
B.EQ 4d5614 <_ZN11qmcplusplus9TimerTypeINSt6chrono3_V212system_clockEE5startEv+0xd4>	1	0.50	0.50	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.50	N/A
CMP W1, #3	1	0	0	0.25	0.25	0	0	0.25	0.25	0	0	0	0	0	0	0	0	0	1	0.33	scal (25.0%)
B.EQ 4d55fc <_ZN11qmcplusplus9TimerTypeINSt6chrono3_V212system_clockEE5startEv+0xbc>	1	0.50	0.50	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.50	N/A
CMP W1, #4	1	0	0	0.25	0.25	0	0	0.25	0.25	0	0	0	0	0	0	0	0	0	1	0.33	scal (25.0%)
B.EQ 4d55e4 <_ZN11qmcplusplus9TimerTypeINSt6chrono3_V212system_clockEE5startEv+0xa4>	1	0.50	0.50	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.50	N/A
CMP W1, #5	1	0	0	0.25	0.25	0	0	0.25	0.25	0	0	0	0	0	0	0	0	0	1	0.33	scal (25.0%)
B.EQ 4d55cc <_ZN11qmcplusplus9TimerTypeINSt6chrono3_V212system_clockEE5startEv+0x8c>	1	0.50	0.50	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.50	N/A
CMP W1, #6	1	0	0	0.25	0.25	0	0	0.25	0.25	0	0	0	0	0	0	0	0	0	1	0.33	N/A
B.NE 4d5788 <_ZN11qmcplusplus9TimerTypeINSt6chrono3_V212system_clockEE5startEv+0x248>	1	0.50	0.50	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.50	N/A
HINT #0																					N/A
HINT #0																					N/A
HINT #0																					N/A
HINT #0																					N/A
HINT #0																					N/A
HINT #0																					N/A
HINT #0																					N/A

Name	Coverage (%)	Time (s)
▼qmcplusplus::TimerType::start()–	0.03	0.04
▼Loop 2620 - NewTimer.cpp:53-81 - exec–	0.00	0.01
○Loop 2621 - NewTimer.cpp:53-54 - exec	0.00	0.00

Report Configuration

Vectorization

Details

Expensive FP math instructions/calls

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

General properties

Front-end

Back-end

Cycles summary

Vectorization ratios

Cycles and memory resources usage

ASM code

Vectorization

Details

Expensive FP math instructions/calls

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

General properties

Front-end

Back-end

Cycles summary

Vectorization ratios

Cycles and memory resources usage

ASM code