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();

0x4be880 STP	X29, X30, [SP, #976]!

0x4be884 ADD	X29, SP, #0

0x4be888 STP	X19, X20, [SP, #16]

0x4be88c LDRB	W20, [X0, #56]

0x4be890 TBNZ	W20, #0, 4be8a0

0x4be894 LDP	X19, X20, [SP, #16]

0x4be898 LDP	X29, X30, [SP], #48

0x4be89c RET

0x4be8a0 STP	X21, X22, [SP, #32]

0x4be8a4 ORR	X22, XZR, X0

0x4be8a8 BL	4043f0

0x4be8ac ORR	W19, WZR, W0

0x4be8b0 CMP	W0, #0

0x4be8b4 B.LE	4bea60

0x4be8b8 ANDS	W1, W0, #128

0x4be8bc SUB	W21, W0, #1

0x4be8c0 B.EQ	4be988

0x4be8c4 CMP	W1, #1

0x4be8c8 B.EQ	4be96c

0x4be8cc CMP	W1, #2

0x4be8d0 B.EQ	4be954

0x4be8d4 CMP	W1, #3

0x4be8d8 B.EQ	4be93c

0x4be8dc CMP	W1, #4

0x4be8e0 B.EQ	4be924

0x4be8e4 CMP	W1, #5

0x4be8e8 B.EQ	4be90c

0x4be8ec CMP	W1, #6

0x4be8f0 B.NE	4beac8

(2408) 0x4be8f4 ORR	W0, WZR, W19

(2408) 0x4be8f8 SUB	W19, W19, #1

(2408) 0x4be8fc BL	404130

(2408) 0x4be900 CMP	W0, #0

(2408) 0x4be904 CCMP	W20, #0, #4, #0

(2408) 0x4be908 CSINC	W20, WZR, WZR, #0

(2408) 0x4be90c ORR	W0, WZR, W19

(2408) 0x4be910 SUB	W19, W19, #1

(2408) 0x4be914 BL	404130

(2408) 0x4be918 CMP	W0, #0

(2408) 0x4be91c CCMP	W20, #0, #4, #0

(2408) 0x4be920 CSINC	W20, WZR, WZR, #0

(2408) 0x4be924 ORR	W0, WZR, W19

(2408) 0x4be928 SUB	W19, W19, #1

(2408) 0x4be92c BL	404130

(2408) 0x4be930 CMP	W0, #0

(2408) 0x4be934 CCMP	W20, #0, #4, #0

(2408) 0x4be938 CSINC	W20, WZR, WZR, #0

(2408) 0x4be93c ORR	W0, WZR, W19

(2408) 0x4be940 SUB	W19, W19, #1

(2408) 0x4be944 BL	404130

(2408) 0x4be948 CMP	W0, #0

(2408) 0x4be94c CCMP	W20, #0, #4, #0

(2408) 0x4be950 CSINC	W20, WZR, WZR, #0

(2408) 0x4be954 ORR	W0, WZR, W19

(2408) 0x4be958 SUB	W19, W19, #1

(2408) 0x4be95c BL	404130

(2408) 0x4be960 CMP	W0, #0

(2408) 0x4be964 CCMP	W20, #0, #4, #0

(2408) 0x4be968 CSINC	W20, WZR, WZR, #0

(2408) 0x4be96c ORR	W0, WZR, W19

(2408) 0x4be970 BL	404130

(2408) 0x4be974 CMP	W0, #0

(2408) 0x4be978 CCMP	W20, #0, #4, #0

(2408) 0x4be97c CSINC	W20, WZR, WZR, #0

(2408) 0x4be980 SUBS	W19, W19, #1

(2408) 0x4be984 B.EQ	4bea4c

  (2409) 0x4be988 ORR	W0, WZR, W19

  (2409) 0x4be98c SUB	W21, W19, #1

  (2409) 0x4be990 BL	404130

  (2409) 0x4be994 CMP	W0, #0

  (2409) 0x4be998 ORR	W0, WZR, W21

  (2409) 0x4be99c CCMP	W20, #0, #4, #0

  (2409) 0x4be9a0 CSINC	W20, WZR, WZR, #0

  (2409) 0x4be9a4 BL	404130

  (2409) 0x4be9a8 ORR	W2, WZR, W0

  (2409) 0x4be9ac SUB	W0, W21, #1

  (2409) 0x4be9b0 CMP	W2, #0

  (2409) 0x4be9b4 CCMP	W20, #0, #4, #0

  (2409) 0x4be9b8 CSINC	W21, WZR, WZR, #0

  (2409) 0x4be9bc BL	404130

  (2409) 0x4be9c0 ORR	W3, WZR, W0

  (2409) 0x4be9c4 SUB	W0, W19, #3

  (2409) 0x4be9c8 CMP	W3, #0

  (2409) 0x4be9cc CCMP	W21, #0, #4, #0

  (2409) 0x4be9d0 CSINC	W20, WZR, WZR, #0

  (2409) 0x4be9d4 BL	404130

  (2409) 0x4be9d8 ORR	W4, WZR, W0

  (2409) 0x4be9dc SUB	W0, W19, #4

  (2409) 0x4be9e0 CMP	W4, #0

  (2409) 0x4be9e4 CCMP	W20, #0, #4, #0

  (2409) 0x4be9e8 CSINC	W21, WZR, WZR, #0

  (2409) 0x4be9ec BL	404130

  (2409) 0x4be9f0 ORR	W5, WZR, W0

  (2409) 0x4be9f4 SUB	W0, W19, #5

  (2409) 0x4be9f8 CMP	W5, #0

  (2409) 0x4be9fc CCMP	W21, #0, #4, #0

  (2409) 0x4bea00 CSINC	W20, WZR, WZR, #0

  (2409) 0x4bea04 BL	404130

  (2409) 0x4bea08 ORR	W6, WZR, W0

  (2409) 0x4bea0c SUB	W0, W19, #6

  (2409) 0x4bea10 CMP	W6, #0

  (2409) 0x4bea14 CCMP	W20, #0, #4, #0

  (2409) 0x4bea18 CSINC	W21, WZR, WZR, #0

  (2409) 0x4bea1c BL	404130

  (2409) 0x4bea20 ORR	W7, WZR, W0

  (2409) 0x4bea24 SUB	W0, W19, #7

  (2409) 0x4bea28 CMP	W7, #0

  (2409) 0x4bea2c CCMP	W21, #0, #4, #0

  (2409) 0x4bea30 CSINC	W20, WZR, WZR, #0

  (2409) 0x4bea34 BL	404130

  (2409) 0x4bea38 CMP	W0, #0

  (2409) 0x4bea3c CCMP	W20, #0, #4, #0

  (2409) 0x4bea40 CSINC	W20, WZR, WZR, #0

  (2409) 0x4bea44 SUBS	W19, W19, #8

  (2409) 0x4bea48 B.NE	4be988

(2408) 0x4bea4c TBNZ	W20, #0, 4bea60

(2408) 0x4bea50 LDP	X21, X22, [SP, #32]

(2408) 0x4bea54 LDP	X19, X20, [SP, #16]

(2408) 0x4bea58 LDP	X29, X30, [SP], #48

(2408) 0x4bea5c RET

(2408) 0x4bea60 LDR	X0, [X22, #72]

(2408) 0x4bea64 CBZ	X0, 4beab0

(2408) 0x4bea68 LDP	X8, X9, [X0, #72]

(2408) 0x4bea6c LDRB	W10, [X22, #64]

(2408) 0x4bea70 CMP	X8, X9

(2408) 0x4bea74 B.EQ	4beaf0

(2408) 0x4bea78 LDUR	X11, [X9, #504]

(2408) 0x4bea7c CBZ	X11, 4beaf0

(2408) 0x4bea80 LDP	X14, X15, [X11, #80]

(2408) 0x4bea84 ADD	X13, X22, #80

(2408) 0x4bea88 LDR	W16, [X11, #96]

(2408) 0x4bea8c STP	X14, X15, [X22, #80]

(2408) 0x4bea90 STR	W16, [X13, #16]

(2408) 0x4bea94 STRB	W10, [X13, X16,SXTW]

(2408) 0x4bea98 CMP	W16, #14

(2408) 0x4bea9c B.GT	4beae0

(2408) 0x4beaa0 ADD	W15, W16, #1

(2408) 0x4beaa4 STR	W15, [X13, #16]

(2408) 0x4beaa8 ORR	X1, XZR, X22

(2408) 0x4beaac BL	4c4740

(2408) 0x4beab0 BL	4041a0

(2408) 0x4beab4 STR	X0, [X22]

(2408) 0x4beab8 LDP	X21, X22, [SP, #32]

(2408) 0x4beabc LDP	X19, X20, [SP, #16]

(2408) 0x4beac0 LDP	X29, X30, [SP], #48

(2408) 0x4beac4 RET

(2408) 0x4beac8 BL	404130

(2408) 0x4beacc CMP	W0, #0

(2408) 0x4bead0 ORR	W19, WZR, W21

(2408) 0x4bead4 CCMP	W20, #0, #4, #0

(2408) 0x4bead8 CSINC	W20, WZR, WZR, #0

(2408) 0x4beadc B	4be8f4

(2408) 0x4beae0 ADRP	X17,

(2408) 0x4beae4 MOVZ	W18, #1

(2408) 0x4beae8 STRB	W18, [X17, #1912]

(2408) 0x4beaec B	4beaa8

(2408) 0x4beaf0 MOVZ	W12, #1

(2408) 0x4beaf4 STP	XZR, XZR, [X22, #80]

(2408) 0x4beaf8 STRB	W10, [X22, #80]

(2408) 0x4beafc STR	W12, [X22, #96]

(2408) 0x4beb00 B	4beaa8

0x4beb04 HINT	#0

0x4beb08 HINT	#0

0x4beb0c HINT	#0

0x4beb10 HINT	#0

0x4beb14 HINT	#0

0x4beb18 HINT	#0

0x4beb1c HINT	#0

Coverage (%)	Name	Source Location	Module
►10.00+	qmcplusplus::ParticleSet::acce[...]	unique_ptr.h:463	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
►7.79+	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
►6.23+	qmcplusplus::WaveFunction::eva[...]	NewTimer.h:242	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
►6.10+	qmcplusplus::SoaDistanceTableA[...]	stl_vector.h:1131	exec
○	qmcplusplus::ParticleSet::acce[...]	stl_vector.h:993	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
►5.84+	qmcplusplus::WaveFunction::eva[...]	stl_vector.h:1128	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
►5.84+	qmcplusplus::SoaDistanceTableA[...]	SoaDistanceTableABOMPTarget.h:189	exec
○	qmcplusplus::ParticleSet::upda[...]	stl_vector.h:993	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
►5.45+	qmcplusplus::ParticleSet::upda[...]	unique_ptr.h:463	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
►5.19+	qmcplusplus::SoaDistanceTableA[...]	unique_ptr.h:193	exec
○	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
►5.06+	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
►3.77+	miniqmcreference::einspline_sp[...]	ParticleSet.h:140	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
►3.64+	qmcplusplus::SoaDistanceTableA[...]	stl_vector.h:1128	exec
○	qmcplusplus::ParticleSet::acce[...]	stl_vector.h:993	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
►3.51+	miniqmcreference::einspline_sp[...]	ParticleSet.h:140	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
►3.38+	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
►2.99+	qmcplusplus::SoaDistanceTableA[...]	OhmmsVector.h:149	exec
○	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
►2.73+	miniqmcreference::DiracDetermi[...]	DiracDeterminantRef.cpp:213	exec
○	qmcplusplus::WaveFunction::eva[...]	stl_vector.h:992	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
►2.73+	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:124	exec
○	qmcplusplus::WaveFunction::acc[...]	stl_vector.h:992	exec
○	main._omp_fn.1	miniqmc.cpp:451	exec
○	gomp_thread_start	team.c:130	libgomp.so.1.0.0
○	start_thread		libc.so.6
○	thread_start		libc.so.6
►2.47+	qmcplusplus::SoaDistanceTableA[...]	NewTimer.h:242	exec
○	qmcplusplus::ParticleSet::upda[...]	stl_vector.h:993	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
►2.47+	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
►1.95+	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
►1.69+	miniqmcreference::DiracDetermi[...]	DelayedUpdate.h:124	exec
○	qmcplusplus::WaveFunction::acc[...]	WaveFunction.cpp:223	exec
○	main._omp_fn.1	miniqmc.cpp:451	exec
○	gomp_thread_start	team.c:130	libgomp.so.1.0.0
○	start_thread		libc.so.6
○	thread_start		libc.so.6
►1.17+	main._omp_fn.1	miniqmc.cpp:433	exec
○	gomp_thread_start	team.c:130	libgomp.so.1.0.0
○	start_thread		libc.so.6
○	thread_start		libc.so.6
►1.17+	miniqmcreference::DiracDetermi[...]	DiracDeterminantRef.cpp:102	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
►1.04+	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
►1.04+	qmcplusplus::WaveFunction::acc[...]	WaveFunction.cpp:228	exec
○	main._omp_fn.1	miniqmc.cpp:451	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_4

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: 4be880

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, 4be8a0 <_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 4043f0 <@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 4bea60 <_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 4be988 <_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 4be96c <_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 4be954 <_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 4be93c <_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 4be924 <_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 4be90c <_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 4beac8 <_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_4

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: 4be880

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, 4be8a0 <_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 4043f0 <@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 4bea60 <_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 4be988 <_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 4be96c <_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 4be954 <_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 4be93c <_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 4be924 <_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 4be90c <_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 4beac8 <_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 2408 - NewTimer.cpp:53-81 - exec–	0.00	0.01
○Loop 2409 - 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