OV - exec - Function reset_field_kernel(int, int, int, int, clover::Buffer2D<double>&, clover::Buffer2D<double>&, clover::Buffer2D<double>&, clover::Buffer2D<double>&, clover::Buffer2D<double>&, clover::Buffer2D<double>&, clover::Buffer2D<double>&, clover::Buffer2D<double>&) [clone ._omp

	Function: reset_field_kernel(int, int, int, int, clover::Buffer2D<double>&, clover::Buffer2D<double> ...	Module: exec	Source: reset_field.cpp:44-48 [...]	Coverage (incl. loops): 2.01% \| (excl. loops): 0.00%

/home/eoseret/qaas/qaas_runs/178-219-7589/intel/CloverLeaf2.0-CXX/build/CloverLeaf2.0-CXX/src/omp/context.h: 69 - 69

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

69:   T &operator()(size_t i, size_t j) const { return data[i + j * sizeX]; }

/home/eoseret/qaas/qaas_runs/178-219-7589/intel/CloverLeaf2.0-CXX/build/CloverLeaf2.0-CXX/src/omp/reset_field.cpp: 44 - 48

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

44: #pragma omp parallel for simd collapse(2)

45:   for (int j = (y_min + 1); j < (y_max + 1 + 2); j++) {

46:     for (int i = (x_min + 1); i < (x_max + 1 + 2); i++) {

47:       xvel0(i, j) = xvel1(i, j);

48:       yvel0(i, j) = yvel1(i, j);

0x435bc0 STP	X29, X30, [SP, #944]!

0x435bc4 ADD	X29, SP, #0

0x435bc8 STP	X19, X20, [SP, #16]

0x435bcc STP	X23, X24, [SP, #48]

0x435bd0 ORR	X23, XZR, X0

0x435bd4 STP	X25, X26, [SP, #64]

0x435bd8 LDP	W25, W19, [X0, #40]

0x435bdc LDR	W20, [X0, #32]

0x435be0 LDR	W0, [X0, #36]

0x435be4 ADD	W25, W25, #1

0x435be8 ADD	W19, W19, #3

0x435bec CMP	W25, W19

0x435bf0 B.GE	435d2c

0x435bf4 ADD	W20, W20, #1

0x435bf8 STP	X21, X22, [SP, #32]

0x435bfc ADD	W22, W0, #3

0x435c00 SUB	W26, W19, W25

0x435c04 CMP	W20, W22

0x435c08 B.GE	435d28

0x435c0c SUB	W21, W22, W20

0x435c10 BL	410670

0x435c14 MUL	W26, W26, W21

0x435c18 ORR	W24, WZR, W0

0x435c1c BL	410550

0x435c20 ORR	W2, WZR, W0

0x435c24 UDIV	W1, W26, W24

0x435c28 MSUB	W0, W1, W24, W26

0x435c2c CMP	W2, W0

0x435c30 B.CC	435d40

0x435c34 MADD	W2, W1, W2, W0

0x435c38 ADD	W13, W1, W2

0x435c3c CMP	W2, W13

0x435c40 B.CS	435d28

0x435c44 UDIV	W0, W2, W21

0x435c48 LDP	X12, X11, [X23]

0x435c4c CNTD	X7, ALL

0x435c50 LDP	X10, X9, [X23, #16]

0x435c54 MSUB	W8, W0, W21, W2

0x435c58 ADD	W0, W0, W25

0x435c5c SBFM	X6, X0, #0, #31

0x435c60 ADD	W8, W8, W20

0x435c64 SUB	W0, W22, W8

0x435c68 CMP	W1, W0

0x435c6c CSEL	X1, X1, X0, #9

0x435c70 ADD	W14, W2, W1

0x435c74 CMP	W2, W14

0x435c78 B.CS	435d18

0x435c7c HINT	#0

  (318) 0x435c80 LDR	X4, [X9]

  (318) 0x435c84 SBFM	X8, X8, #0, #31

  (318) 0x435c88 MOVZ	X0, #0

  (318) 0x435c8c WHILELO	P7.D, XZR, X1

  (318) 0x435c90 LDR	X2, [X10]

  (318) 0x435c94 LDR	X5, [X11]

  (318) 0x435c98 MADD	X4, X6, X4, X8

  (318) 0x435c9c LDR	X3, [X12]

  (318) 0x435ca0 MADD	X2, X6, X2, X8

  (318) 0x435ca4 LDR	X15, [X9, #16]

  (318) 0x435ca8 MADD	X5, X6, X5, X8

  (318) 0x435cac LDR	X17, [X11, #16]

  (318) 0x435cb0 MADD	X3, X6, X3, X8

  (318) 0x435cb4 LDR	X16, [X12, #16]

  (318) 0x435cb8 ADD	X4, X15, X4,LSL #3

  (318) 0x435cbc LDR	X8, [X10, #16]

  (318) 0x435cc0 ADD	X5, X17, X5,LSL #3

  (318) 0x435cc4 ADD	X3, X16, X3,LSL #3

  (318) 0x435cc8 ADD	X2, X8, X2,LSL #3

    (317) 0x435ccc LD1D	{Z30.D}, P7/Z, [X5, X0,LSL #3]

    (317) 0x435cd0 ST1D	{Z30.D}, P7, [X3, X0,LSL #3]

    (317) 0x435cd4 LD1D	{Z31.D}, P7/Z, [X4, X0,LSL #3]

    (317) 0x435cd8 ST1D	{Z31.D}, P7, [X2, X0,LSL #3]

    (317) 0x435cdc ADD	X0, X0, X7

    (317) 0x435ce0 WHILELO	P7.D, X0, X1

    (317) 0x435ce4 B.NE	435ccc

  (318) 0x435ce8 ADD	X6, X6, #1

  (318) 0x435cec CMP	W19, W6

  (318) 0x435cf0 B.LE	435d28

  (318) 0x435cf4 SUB	W1, W13, W14

  (318) 0x435cf8 ORR	W0, WZR, W21

  (318) 0x435cfc ORR	W2, WZR, W14

  (318) 0x435d00 CMP	W1, W0

  (318) 0x435d04 CSEL	X1, X1, X0, #9

  (318) 0x435d08 ADD	W14, W2, W1

  (318) 0x435d0c ORR	W8, WZR, W20

  (318) 0x435d10 CMP	W2, W14

  (318) 0x435d14 B.CC	435c80

(319) 0x435d18 ADD	X6, X6, #1

(319) 0x435d1c ORR	W14, WZR, W2

(319) 0x435d20 CMP	W19, W6

(319) 0x435d24 B.GT	435cf4

0x435d28 LDP	X21, X22, [SP, #32]

0x435d2c LDP	X19, X20, [SP, #16]

0x435d30 LDP	X23, X24, [SP, #48]

0x435d34 LDP	X25, X26, [SP, #64]

0x435d38 LDP	X29, X30, [SP], #80

0x435d3c RET

0x435d40 ADD	W1, W1, #1

0x435d44 MOVZ	W0, #0

0x435d48 B	435c34

Coverage (%)	Name	Source Location	Module
►98.43+	omp_fulfill_event		libgomp.so.1.0.0
○	start_thread		libc.so.6
○	thread_start		libc.so.6
►1.57+	GOMP_parallel		libgomp.so.1.0.0
○	reset_field(global_variables&)	reset_field.cpp:61	exec
○	hydro(global_variables&, paral[...]	basic_string.h:1231	exec
○	main	clover_leaf.cpp:209	exec
○	__libc_start_call_main		libc.so.6
○	__libc_start_main		libc.so.6
○	_start	clover_leaf.cpp:51	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 /

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 0.00% of application time for run gcc_0

Source file and lines	reset_field.cpp:44-48
Module	exec

The function is defined in:

/home/eoseret/qaas/qaas_runs/178-219-7589/intel/CloverLeaf2.0-CXX/build/CloverLeaf2.0-CXX/src/omp/context.h:69
/home/eoseret/qaas/qaas_runs/178-219-7589/intel/CloverLeaf2.0-CXX/build/CloverLeaf2.0-CXX/src/omp/reset_field.cpp:44-48

Warnings:
Ignoring paths for analysis

gain
potential
hint
expert

Vectorization

Your function is not vectorized. Only 27% 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 25.00 to 8.25 cycles (3.03x speedup).

CALL instructions

Detected function call instructions.

Details

Calling (and then returning from) a function prevents many compiler optimizations (like vectorization), breaks control flow (which reduces pipeline performance) and executes extra instructions to save/restore the registers used inside it, which is very expensive (dozens of cycles). Consider to inline small functions.

unknown: 2 occurrences►
- /home/eoseret/qaas/qaas_runs/178-219-7589/intel/CloverLeaf2.0-CXX/build/CloverLeaf2.0-CXX/src/omp/reset_field.cpp:45
- /home/eoseret/qaas/qaas_runs/178-219-7589/intel/CloverLeaf2.0-CXX/build/CloverLeaf2.0-CXX/src/omp/reset_field.cpp:45

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 6 bytes.

General properties

nb instructions	57
nb uops	56
loop length	228
used w registers	14
used x registers	19
used b registers	0
used h registers	0
used s registers	1
used d registers	0
used q registers	0
used v registers	0
used z registers	0
nb stack references	10

Front-end

MACRO FUSION NOT POSSIBLE FIT IN UOP CACHE

micro-operation queue	7.00 cycles
front end	7.00 cycles

Back-end

	P0	P1	P2	P3	P4	P5	P6	P7	P8	P9	P10	P11	P12	P13	P14
uops	4.50	4.50	8.75	8.75	8.75	8.75	0.00	0.00	0.00	0.00	5.17	4.83	5.00	2.50	2.50
cycles	4.50	4.50	8.75	8.75	8.75	8.75	0.00	0.00	0.00	0.00	5.17	4.83	5.00	2.50	2.50

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

10.00-25.00

Cycles summary

Front-end	7.00
Dispatch	8.75
DIV/SQRT	10.00-25.00
Overall L1	10.00-25.00

Vectorization ratios

all	0%
load	0%
store	0%
mul	0%
add-sub	0%
fma	0%
div/sqrt	NA (no div/sqrt vectorizable/vectorized instructions)
other	0%

Vector efficiency ratios

all	27%
load	42%
store	50%
mul	12%
add-sub	13%
fma	12%
div/sqrt	NA (no div/sqrt vectorizable/vectorized instructions)
other	22%

Cycles and memory resources usage

Assuming all data fit into the L1 cache, each call to the function takes 25.00 cycles. At this rate:

0% of peak load performance is reached (0.24 out of 96.00 bytes loaded per cycle (GB/s @ 1GHz))

Front-end bottlenecks

Found no such bottlenecks.

ASM code

In the binary file, the address of the function is: 435bc0

Instruction	Nb FU	P0	P1	P2	P3	P4	P5	P6	P7	P8	P9	P10	P11	P12	P13	P14	Latency	Recip. throughput	Vectorization
STP X29, X30, [SP, #944]!	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0.50	0.50	0	0.50	0.50	1	0.50	scal (50.0%)
ADD X29, SP, #0	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	0	0	0	1	0.25	scal (25.0%)
STP X19, X20, [SP, #16]	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	0	0.50	0.50	1	0.50	scal (50.0%)
STP X23, X24, [SP, #48]	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	0	0.50	0.50	1	0.50	scal (50.0%)
ORR X23, XZR, X0	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	0	0	0	1	0.25	N/A
STP X25, X26, [SP, #64]	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	0	0.50	0.50	1	0.50	scal (50.0%)
LDP W25, W19, [X0, #40]	1	0	0	0	0	0	0	0	0	0	0	0.33	0.33	0.33	0	0	4	0.33	scal (25.0%)
LDR W20, [X0, #32]	1	0	0	0	0	0	0	0	0	0	0	0.33	0.33	0.33	0	0	4	0.33	scal (12.5%)
LDR W0, [X0, #36]	1	0	0	0	0	0	0	0	0	0	0	0.33	0.33	0.33	0	0	4	0.33	N/A
ADD W25, W25, #1	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	0	0	0	1	0.25	scal (12.5%)
ADD W19, W19, #3	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	0	0	0	1	0.25	scal (12.5%)
CMP W25, W19	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	0	0	0	1	0.33	scal (12.5%)
B.GE 435d2c <_Z18reset_field_kerneliiiiRN6clover8Buffer2DIdEES2_S2_S2_S2_S2_S2_S2_._omp_fn.1+0x16c>	1	0.50	0.50	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.50	N/A
ADD W20, W20, #1	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	0	0	0	1	0.25	scal (12.5%)
STP X21, X22, [SP, #32]	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	0	0.50	0.50	1	0.50	scal (50.0%)
ADD W22, W0, #3	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	0	0	0	1	0.25	scal (12.5%)
SUB W26, W19, W25	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	0	0	0	1	0.25	scal (12.5%)
CMP W20, W22	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	0	0	0	1	0.33	scal (12.5%)
B.GE 435d28 <_Z18reset_field_kerneliiiiRN6clover8Buffer2DIdEES2_S2_S2_S2_S2_S2_S2_._omp_fn.1+0x168>	1	0.50	0.50	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.50	N/A
SUB W21, W22, W20	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	0	0	0	1	0.25	scal (12.5%)
BL 410670 <@plt_start@+0x650>	1	0.50	0.50	0.50	0.50	0	0	0	0	0	0	0	0	0	0	0	1	0.50	N/A
MUL W26, W26, W21	1	0	0	0	0	0.50	0.50	0	0	0	0	0	0	0	0	0	2	0.50	scal (12.5%)
ORR W24, WZR, W0	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	0	0	0	1	0.25	scal (12.5%)
BL 410550 <@plt_start@+0x530>	1	0.50	0.50	0.50	0.50	0	0	0	0	0	0	0	0	0	0	0	1	0.50	N/A
ORR W2, WZR, W0	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	0	0	0	1	0.25	scal (12.5%)
UDIV W1, W26, W24	1	0	0	0	0	1	0	0	0	0	0	0	0	0	0	0	5-12	5-12.50	N/A
MSUB W0, W1, W24, W26	1	0	0	0	0	1	0	0	0	0	0	0	0	0	0	0	2	1	N/A
CMP W2, W0	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	0	0	0	1	0.33	scal (12.5%)
B.CC 435d40 <_Z18reset_field_kerneliiiiRN6clover8Buffer2DIdEES2_S2_S2_S2_S2_S2_S2_._omp_fn.1+0x180>	1	0.50	0.50	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.50	N/A
MADD W2, W1, W2, W0	1	0	0	0	0	1	0	0	0	0	0	0	0	0	0	0	2	1	scal (12.5%)
ADD W13, W1, W2	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	0	0	0	1	0.25	scal (12.5%)
CMP W2, W13	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	0	0	0	1	0.33	scal (12.5%)
B.CS 435d28 <_Z18reset_field_kerneliiiiRN6clover8Buffer2DIdEES2_S2_S2_S2_S2_S2_S2_._omp_fn.1+0x168>	1	0.50	0.50	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.50	N/A
UDIV W0, W2, W21	1	0	0	0	0	1	0	0	0	0	0	0	0	0	0	0	5-12	5-12.50	N/A
LDP X12, X11, [X23]	1	0	0	0	0	0	0	0	0	0	0	0.33	0.33	0.33	0	0	4	1	scal (50.0%)
CNTD X7, ALL	1	0	0	0	0	1	0	0	0	0	0	0	0	0	0	0	2	1	scal (25.0%)
LDP X10, X9, [X23, #16]	1	0	0	0	0	0	0	0	0	0	0	0.33	0.33	0.33	0	0	4	1	scal (50.0%)
MSUB W8, W0, W21, W2	1	0	0	0	0	1	0	0	0	0	0	0	0	0	0	0	2	1	scal (12.5%)
ADD W0, W0, W25	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	0	0	0	1	0.25	N/A
SBFM X6, X0, #0, #31	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	0	0	0	1	0.25	scal (100.0%)
ADD W8, W8, W20	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	0	0	0	1	0.25	scal (12.5%)
SUB W0, W22, W8	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	0	0	0	1	0.25	N/A
CMP W1, W0	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	0	0	0	1	0.33	scal (12.5%)
CSEL X1, X1, X0, #9	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	0	0	0	1	0.25	N/A
ADD W14, W2, W1	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	0	0	0	1	0.25	scal (12.5%)
CMP W2, W14	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	0	0	0	1	0.33	scal (12.5%)
B.CS 435d18 <_Z18reset_field_kerneliiiiRN6clover8Buffer2DIdEES2_S2_S2_S2_S2_S2_S2_._omp_fn.1+0x158>	1	0.50	0.50	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.50	N/A
HINT #0																			N/A
LDP X21, X22, [SP, #32]	1	0	0	0	0	0	0	0	0	0	0	0.33	0.33	0.33	0	0	4	1	scal (50.0%)
LDP X19, X20, [SP, #16]	1	0	0	0	0	0	0	0	0	0	0	0.33	0.33	0.33	0	0	4	1	scal (50.0%)
LDP X23, X24, [SP, #48]	1	0	0	0	0	0	0	0	0	0	0	0.33	0.33	0.33	0	0	4	1	N/A
LDP X25, X26, [SP, #64]	1	0	0	0	0	0	0	0	0	0	0	0.33	0.33	0.33	0	0	4	1	scal (50.0%)
LDP X29, X30, [SP], #80	1	0	0	0	0	0	0	0	0	0	0	0.33	0.33	0.33	0	0	4	1	scal (50.0%)
RET	1	0.50	0.50	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.50	N/A
ADD W1, W1, #1	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	0	0	0	1	0.25	N/A
MOVZ W0, #0	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	0	0	0	1	0.25	N/A
B 435c34 <_Z18reset_field_kerneliiiiRN6clover8Buffer2DIdEES2_S2_S2_S2_S2_S2_S2_._omp_fn.1+0x74>	1	0.50	0.50	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.50	N/A

The code analyzed by CQA in that panel excludes loops and represents 0.00% of application time for run gcc_0

Source file and lines	reset_field.cpp:44-48
Module	exec

The function is defined in:

/home/eoseret/qaas/qaas_runs/178-219-7589/intel/CloverLeaf2.0-CXX/build/CloverLeaf2.0-CXX/src/omp/context.h:69
/home/eoseret/qaas/qaas_runs/178-219-7589/intel/CloverLeaf2.0-CXX/build/CloverLeaf2.0-CXX/src/omp/reset_field.cpp:44-48

Warnings:
Ignoring paths for analysis

gain
potential
hint
expert

Vectorization

Your function is not vectorized. Only 27% 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 25.00 to 8.25 cycles (3.03x speedup).

CALL instructions

Detected function call instructions.

Details

unknown: 2 occurrences►
- /home/eoseret/qaas/qaas_runs/178-219-7589/intel/CloverLeaf2.0-CXX/build/CloverLeaf2.0-CXX/src/omp/reset_field.cpp:45
- /home/eoseret/qaas/qaas_runs/178-219-7589/intel/CloverLeaf2.0-CXX/build/CloverLeaf2.0-CXX/src/omp/reset_field.cpp:45

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 6 bytes.

General properties

nb instructions	57
nb uops	56
loop length	228
used w registers	14
used x registers	19
used b registers	0
used h registers	0
used s registers	1
used d registers	0
used q registers	0
used v registers	0
used z registers	0
nb stack references	10

Front-end

MACRO FUSION NOT POSSIBLE FIT IN UOP CACHE

micro-operation queue	7.00 cycles
front end	7.00 cycles

Back-end

	P0	P1	P2	P3	P4	P5	P6	P7	P8	P9	P10	P11	P12	P13	P14
uops	4.50	4.50	8.75	8.75	8.75	8.75	0.00	0.00	0.00	0.00	5.17	4.83	5.00	2.50	2.50
cycles	4.50	4.50	8.75	8.75	8.75	8.75	0.00	0.00	0.00	0.00	5.17	4.83	5.00	2.50	2.50

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

10.00-25.00

Cycles summary

Front-end	7.00
Dispatch	8.75
DIV/SQRT	10.00-25.00
Overall L1	10.00-25.00

Vectorization ratios

all	0%
load	0%
store	0%
mul	0%
add-sub	0%
fma	0%
div/sqrt	NA (no div/sqrt vectorizable/vectorized instructions)
other	0%

Vector efficiency ratios

all	27%
load	42%
store	50%
mul	12%
add-sub	13%
fma	12%
div/sqrt	NA (no div/sqrt vectorizable/vectorized instructions)
other	22%

Cycles and memory resources usage

Assuming all data fit into the L1 cache, each call to the function takes 25.00 cycles. At this rate:

0% of peak load performance is reached (0.24 out of 96.00 bytes loaded per cycle (GB/s @ 1GHz))

Front-end bottlenecks

Found no such bottlenecks.

ASM code

In the binary file, the address of the function is: 435bc0

Instruction	Nb FU	P0	P1	P2	P3	P4	P5	P6	P7	P8	P9	P10	P11	P12	P13	P14	Latency	Recip. throughput	Vectorization
STP X29, X30, [SP, #944]!	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0.50	0.50	0	0.50	0.50	1	0.50	scal (50.0%)
ADD X29, SP, #0	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	0	0	0	1	0.25	scal (25.0%)
STP X19, X20, [SP, #16]	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	0	0.50	0.50	1	0.50	scal (50.0%)
STP X23, X24, [SP, #48]	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	0	0.50	0.50	1	0.50	scal (50.0%)
ORR X23, XZR, X0	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	0	0	0	1	0.25	N/A
STP X25, X26, [SP, #64]	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	0	0.50	0.50	1	0.50	scal (50.0%)
LDP W25, W19, [X0, #40]	1	0	0	0	0	0	0	0	0	0	0	0.33	0.33	0.33	0	0	4	0.33	scal (25.0%)
LDR W20, [X0, #32]	1	0	0	0	0	0	0	0	0	0	0	0.33	0.33	0.33	0	0	4	0.33	scal (12.5%)
LDR W0, [X0, #36]	1	0	0	0	0	0	0	0	0	0	0	0.33	0.33	0.33	0	0	4	0.33	N/A
ADD W25, W25, #1	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	0	0	0	1	0.25	scal (12.5%)
ADD W19, W19, #3	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	0	0	0	1	0.25	scal (12.5%)
CMP W25, W19	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	0	0	0	1	0.33	scal (12.5%)
B.GE 435d2c <_Z18reset_field_kerneliiiiRN6clover8Buffer2DIdEES2_S2_S2_S2_S2_S2_S2_._omp_fn.1+0x16c>	1	0.50	0.50	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.50	N/A
ADD W20, W20, #1	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	0	0	0	1	0.25	scal (12.5%)
STP X21, X22, [SP, #32]	1	0	0	0	0	0	0	0	0	0	0	0.50	0.50	0	0.50	0.50	1	0.50	scal (50.0%)
ADD W22, W0, #3	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	0	0	0	1	0.25	scal (12.5%)
SUB W26, W19, W25	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	0	0	0	1	0.25	scal (12.5%)
CMP W20, W22	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	0	0	0	1	0.33	scal (12.5%)
B.GE 435d28 <_Z18reset_field_kerneliiiiRN6clover8Buffer2DIdEES2_S2_S2_S2_S2_S2_S2_._omp_fn.1+0x168>	1	0.50	0.50	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.50	N/A
SUB W21, W22, W20	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	0	0	0	1	0.25	scal (12.5%)
BL 410670 <@plt_start@+0x650>	1	0.50	0.50	0.50	0.50	0	0	0	0	0	0	0	0	0	0	0	1	0.50	N/A
MUL W26, W26, W21	1	0	0	0	0	0.50	0.50	0	0	0	0	0	0	0	0	0	2	0.50	scal (12.5%)
ORR W24, WZR, W0	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	0	0	0	1	0.25	scal (12.5%)
BL 410550 <@plt_start@+0x530>	1	0.50	0.50	0.50	0.50	0	0	0	0	0	0	0	0	0	0	0	1	0.50	N/A
ORR W2, WZR, W0	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	0	0	0	1	0.25	scal (12.5%)
UDIV W1, W26, W24	1	0	0	0	0	1	0	0	0	0	0	0	0	0	0	0	5-12	5-12.50	N/A
MSUB W0, W1, W24, W26	1	0	0	0	0	1	0	0	0	0	0	0	0	0	0	0	2	1	N/A
CMP W2, W0	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	0	0	0	1	0.33	scal (12.5%)
B.CC 435d40 <_Z18reset_field_kerneliiiiRN6clover8Buffer2DIdEES2_S2_S2_S2_S2_S2_S2_._omp_fn.1+0x180>	1	0.50	0.50	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.50	N/A
MADD W2, W1, W2, W0	1	0	0	0	0	1	0	0	0	0	0	0	0	0	0	0	2	1	scal (12.5%)
ADD W13, W1, W2	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	0	0	0	1	0.25	scal (12.5%)
CMP W2, W13	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	0	0	0	1	0.33	scal (12.5%)
B.CS 435d28 <_Z18reset_field_kerneliiiiRN6clover8Buffer2DIdEES2_S2_S2_S2_S2_S2_S2_._omp_fn.1+0x168>	1	0.50	0.50	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.50	N/A
UDIV W0, W2, W21	1	0	0	0	0	1	0	0	0	0	0	0	0	0	0	0	5-12	5-12.50	N/A
LDP X12, X11, [X23]	1	0	0	0	0	0	0	0	0	0	0	0.33	0.33	0.33	0	0	4	1	scal (50.0%)
CNTD X7, ALL	1	0	0	0	0	1	0	0	0	0	0	0	0	0	0	0	2	1	scal (25.0%)
LDP X10, X9, [X23, #16]	1	0	0	0	0	0	0	0	0	0	0	0.33	0.33	0.33	0	0	4	1	scal (50.0%)
MSUB W8, W0, W21, W2	1	0	0	0	0	1	0	0	0	0	0	0	0	0	0	0	2	1	scal (12.5%)
ADD W0, W0, W25	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	0	0	0	1	0.25	N/A
SBFM X6, X0, #0, #31	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	0	0	0	1	0.25	scal (100.0%)
ADD W8, W8, W20	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	0	0	0	1	0.25	scal (12.5%)
SUB W0, W22, W8	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	0	0	0	1	0.25	N/A
CMP W1, W0	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	0	0	0	1	0.33	scal (12.5%)
CSEL X1, X1, X0, #9	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	0	0	0	1	0.25	N/A
ADD W14, W2, W1	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	0	0	0	1	0.25	scal (12.5%)
CMP W2, W14	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	0	0	0	1	0.33	scal (12.5%)
B.CS 435d18 <_Z18reset_field_kerneliiiiRN6clover8Buffer2DIdEES2_S2_S2_S2_S2_S2_S2_._omp_fn.1+0x158>	1	0.50	0.50	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.50	N/A
HINT #0																			N/A
LDP X21, X22, [SP, #32]	1	0	0	0	0	0	0	0	0	0	0	0.33	0.33	0.33	0	0	4	1	scal (50.0%)
LDP X19, X20, [SP, #16]	1	0	0	0	0	0	0	0	0	0	0	0.33	0.33	0.33	0	0	4	1	scal (50.0%)
LDP X23, X24, [SP, #48]	1	0	0	0	0	0	0	0	0	0	0	0.33	0.33	0.33	0	0	4	1	N/A
LDP X25, X26, [SP, #64]	1	0	0	0	0	0	0	0	0	0	0	0.33	0.33	0.33	0	0	4	1	scal (50.0%)
LDP X29, X30, [SP], #80	1	0	0	0	0	0	0	0	0	0	0	0.33	0.33	0.33	0	0	4	1	scal (50.0%)
RET	1	0.50	0.50	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.50	N/A
ADD W1, W1, #1	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	0	0	0	1	0.25	N/A
MOVZ W0, #0	1	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	0	0	0	1	0.25	N/A
B 435c34 <_Z18reset_field_kerneliiiiRN6clover8Buffer2DIdEES2_S2_S2_S2_S2_S2_S2_._omp_fn.1+0x74>	1	0.50	0.50	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.50	N/A

Name	Coverage (%)	Time (s)
▼reset_field_kernel(int, int, int, int, clover::Buffer2D&, clover::Buffer2D&, clover::Buffer2D&, clover::Buffer2D&, clover::Buffer2D&, clover::Buffer2D&, clover::Buffer2D&, clover::Buffer2D&) [...–	2.01	2.75
▼Loop 319 - reset_field.cpp:46-48 - exec–	0.00	0.00
▼Loop 318 - reset_field.cpp:46-48 - exec–	0.00	0.02
○Loop 317 - reset_field.cpp:47-48 - exec	2.01	2.67

Report Configuration

Vectorization

Details

Expensive FP math instructions/calls

CALL instructions

Details

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

Expensive FP math instructions/calls

CALL instructions

Details

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