OV - exec - Function getBoxFromTuple

	Function: getBoxFromTuple	Module: exec	Source: linkCells.c:204-250	Coverage (incl. loops): 0.16% \| (excl. loops): 0.01%

/home/eoseret/qaas_runs_ZEN5/174-043-3878/intel/CoMD/build/CoMD/CoMD/src-openmp/linkCells.c: 204 - 250

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

204: {

205:    int iBox = 0;

206:    const int* gridSize = boxes->gridSize; // alias

207:

208:    // Halo in Z+

209:    if (iz == gridSize[2])

210:    {

211:       iBox = boxes->nLocalBoxes + 2*gridSize[2]*gridSize[1] + 2*gridSize[2]*(gridSize[0]+2) +

212:          (gridSize[0]+2)*(gridSize[1]+2) + (gridSize[0]+2)*(iy+1) + (ix+1);

213:    }

214:    // Halo in Z-

215:    else if (iz == -1)

216:    {

217:       iBox = boxes->nLocalBoxes + 2*gridSize[2]*gridSize[1] + 2*gridSize[2]*(gridSize[0]+2) +

218:          (gridSize[0]+2)*(iy+1) + (ix+1);

219:    }

220:    // Halo in Y+

221:    else if (iy == gridSize[1])

222:    {

223:       iBox = boxes->nLocalBoxes + 2*gridSize[2]*gridSize[1] + gridSize[2]*(gridSize[0]+2) +

224:          (gridSize[0]+2)*iz + (ix+1);

225:    }

226:    // Halo in Y-

227:    else if (iy == -1)

228:    {

229:       iBox = boxes->nLocalBoxes + 2*gridSize[2]*gridSize[1] + iz*(gridSize[0]+2) + (ix+1);

230:    }

231:    // Halo in X+

232:    else if (ix == gridSize[0])

233:    {

234:       iBox = boxes->nLocalBoxes + gridSize[1]*gridSize[2] + iz*gridSize[1] + iy;

235:    }

236:    // Halo in X-

237:    else if (ix == -1)

238:    {

239:       iBox = boxes->nLocalBoxes + iz*gridSize[1] + iy;

240:    }

241:    // local link celll.

242:    else

243:    {

244:       iBox = ix + gridSize[0]*iy + gridSize[0]*gridSize[1]*iz;

245:    }

246:    assert(iBox >= 0);

247:    assert(iBox < boxes->nTotalBoxes);

248:

249:    return iBox;

250: }

0x40a4d0 PUSH	%RBP

0x40a4d1 MOV	%EDX,%EAX

0x40a4d3 MOV	0x8(%RDI),%EDX

0x40a4d6 MOV	%ECX,%R9D

0x40a4d9 MOV	%ESI,%R8D

0x40a4dc MOV	(%RDI),%ECX

0x40a4de MOV	0x4(%RDI),%ESI

0x40a4e1 MOV	%RSP,%RBP

0x40a4e4 CMP	%R9D,%EDX

0x40a4e7 JE	40a570

0x40a4ed CMP	$-0x1,%R9D

0x40a4f1 JE	40a530

0x40a4f3 CMP	%ESI,%EAX

0x40a4f5 JE	40a5c0

0x40a4fb CMP	$-0x1,%EAX

0x40a4fe JE	40a5a0

0x40a504 CMP	%ECX,%R8D

0x40a507 JE	40a5f0

0x40a50d CMP	$-0x1,%R8D

0x40a511 JE	40a610

0x40a517 IMUL	%ECX,%ESI

0x40a51a IMUL	%ECX,%EAX

0x40a51d IMUL	%R9D,%ESI

0x40a521 ADD	%R8D,%EAX

0x40a524 ADD	%ESI,%EAX

0x40a526 JMP	40a551

0x40a528 NOPL	(%RAX,%RAX,1)

0x40a530 MOV	0xc(%RDI),%R9D

0x40a534 IMUL	%EDX,%ESI

0x40a537 ADD	$0x2,%ECX

0x40a53a INC	%EAX

0x40a53c IMUL	%ECX,%EDX

0x40a53f IMUL	%ECX,%EAX

0x40a542 LEA	(%R9,%RSI,2),%R10D

0x40a546 LEA	(%R10,%RDX,2),%EDX

0x40a54a ADD	%EDX,%EAX

0x40a54c LEA	0x1(%R8,%RAX,1),%EAX

0x40a551 TEST	%EAX,%EAX

0x40a553 JS	40a61e

0x40a559 CMP	%EAX,0x14(%RDI)

0x40a55c JLE	40a637

0x40a562 POP	%RBP

0x40a563 RET

0x40a564 NOPW	%CS:(%RAX,%RAX,1)

0x40a56f NOP

0x40a570 MOV	0xc(%RDI),%R9D

0x40a574 MOV	%EDX,%R11D

0x40a577 ADD	$0x2,%ECX

0x40a57a INC	%EAX

0x40a57c IMUL	%ESI,%R11D

0x40a580 ADD	$0x2,%ESI

0x40a583 IMUL	%ECX,%EDX

0x40a586 IMUL	%ECX,%ESI

0x40a589 IMUL	%ECX,%EAX

0x40a58c LEA	(%R9,%R11,2),%R10D

0x40a590 LEA	(%R10,%RDX,2),%EDX

0x40a594 ADD	%EDX,%ESI

0x40a596 ADD	%ESI,%EAX

0x40a598 LEA	0x1(%R8,%RAX,1),%EAX

0x40a59d JMP	40a551

0x40a59f NOP

0x40a5a0 MOV	0xc(%RDI),%EAX

0x40a5a3 IMUL	%ESI,%EDX

0x40a5a6 ADD	$0x2,%ECX

0x40a5a9 IMUL	%R9D,%ECX

0x40a5ad LEA	(%RAX,%RDX,2),%R10D

0x40a5b1 ADD	%ECX,%R10D

0x40a5b4 LEA	0x1(%R8,%R10,1),%EAX

0x40a5b9 JMP	40a551

0x40a5bb NOPL	(%RAX,%RAX,1)

0x40a5c0 MOV	0xc(%RDI),%R11D

0x40a5c4 IMUL	%EDX,%EAX

0x40a5c7 ADD	$0x2,%ECX

0x40a5ca IMUL	%ECX,%EDX

0x40a5cd IMUL	%R9D,%ECX

0x40a5d1 LEA	(%R11,%RAX,2),%ESI

0x40a5d5 ADD	%ESI,%EDX

0x40a5d7 ADD	%ECX,%EDX

0x40a5d9 LEA	0x1(%R8,%RDX,1),%EAX

0x40a5de JMP	40a551

0x40a5e3 NOPW	%CS:(%RAX,%RAX,1)

0x40a5ee XCHG	%AX,%AX

0x40a5f0 IMUL	%ESI,%EDX

0x40a5f3 ADD	0xc(%RDI),%EDX

0x40a5f6 IMUL	%R9D,%ESI

0x40a5fa ADD	%ESI,%EDX

0x40a5fc ADD	%EDX,%EAX

0x40a5fe JMP	40a551

0x40a603 NOPW	%CS:(%RAX,%RAX,1)

0x40a60e XCHG	%AX,%AX

0x40a610 IMUL	%R9D,%ESI

0x40a614 ADD	0xc(%RDI),%ESI

0x40a617 ADD	%ESI,%EAX

0x40a619 JMP	40a551

0x40a61e MOV	$0x410eb0,%ECX

0x40a623 MOV	$0xf6,%EDX

0x40a628 MOV	$0x410d98,%ESI

0x40a62d MOV	$0x410e67,%EDI

0x40a632 CALL	4030c0 <__assert_fail@plt>

0x40a637 MOV	$0x410eb0,%ECX

0x40a63c MOV	$0xf7,%EDX

0x40a641 MOV	$0x410d98,%ESI

0x40a646 MOV	$0x410e71,%EDI

0x40a64b CALL	4030c0 <__assert_fail@plt>

Coverage (%)	Name	Source Location	Module
►78.59+	updateLinkCells	linkCells.c:298	exec
○	redistributeAtoms	timestep.c:148	exec
○	timestep	timestep.c:47	exec
○	main	CoMD.c:125	exec
►12.85+	updateLinkCells	linkCells.c:298	exec
○	redistributeAtoms	timestep.c:148	exec
○	timestep	timestep.c:47	exec
○	main	CoMD.c:125	exec
○	__libc_start_call_main		libc.so.6
○	__libc_start_main		libc.so.6
○	_start	CoMD.c:468	exec
►1.52+	putAtomInBox	linkCells.c:178	exec
○	unloadAtomsBuffer	haloExchange.c:417	exec
○	haloExchange	haloExchange.c:303	exec
○	redistributeAtoms	timestep.c:150	exec
○	timestep	timestep.c:47	exec
○	main	CoMD.c:125	exec
►1.24+	putAtomInBox	linkCells.c:178	exec
○	unloadAtomsBuffer	haloExchange.c:424	exec
○	haloExchange	haloExchange.c:302	exec
○	redistributeAtoms	timestep.c:150	exec
○	timestep	timestep.c:47	exec
○	main	CoMD.c:125	exec
►1.18+	putAtomInBox	linkCells.c:178	exec
○	unloadAtomsBuffer	haloExchange.c:417	exec
○	haloExchange	haloExchange.c:302	exec
○	redistributeAtoms	timestep.c:150	exec
○	timestep	timestep.c:47	exec
○	main	CoMD.c:125	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 0.01% of application time for run gcc_10

Source file and lines	linkCells.c:204-250
Module	exec

The function is defined in /home/eoseret/qaas_runs_ZEN5/174-043-3878/intel/CoMD/build/CoMD/CoMD/src-openmp/linkCells.c:204-250.

Warnings:

Ignoring paths for analysis
Too many paths. Rerun with max-paths=21

Try to simplify control and/or increase the maximum number of paths per function/loop through the 'max-paths-nb' option.

This function has 21 execution paths.

The presence of multiple execution paths is typically the main/first bottleneck.
Try to simplify control inside function: ideally, try to remove all conditional expressions, for example by (if applicable):

hoisting them (moving them outside the function)
turning them into conditional moves, MIN or MAX

Ex: if (x<0) x=0 => x = (x<0 ? 0 : x) (or MAX(0,x) after defining the corresponding macro)

gain
potential
hint
expert

Vectorization

Your function is not vectorized. Only 6% of vector register length is used (average across all SSE/AVX instructions). By vectorizing your function, you can lower the cost of an iteration from 13.50 to 0.84 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): for(i) a[i].x = b[i].x; (slow, non stride 1) => for(i) a.x[i] = b.x[i]; (fast, stride 1)

Execution units bottlenecks

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

No data for this section

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.

__assert_fail@plt: 2 occurrences►
- /home/eoseret/qaas_runs_ZEN5/174-043-3878/intel/CoMD/build/CoMD/CoMD/src-openmp/linkCells.c:246
- /home/eoseret/qaas_runs_ZEN5/174-043-3878/intel/CoMD/build/CoMD/CoMD/src-openmp/linkCells.c:247

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.

LEA: 4 occurrences►
- /home/eoseret/qaas_runs_ZEN5/174-043-3878/intel/CoMD/build/CoMD/CoMD/src-openmp/linkCells.c:217
- /home/eoseret/qaas_runs_ZEN5/174-043-3878/intel/CoMD/build/CoMD/CoMD/src-openmp/linkCells.c:211
- /home/eoseret/qaas_runs_ZEN5/174-043-3878/intel/CoMD/build/CoMD/CoMD/src-openmp/linkCells.c:229
- /home/eoseret/qaas_runs_ZEN5/174-043-3878/intel/CoMD/build/CoMD/CoMD/src-openmp/linkCells.c:223

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 40 bytes.

General properties

nb instructions	104
nb uops	101
loop length	384
used x86 registers	11
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	12.63 cycles
front end	12.63 cycles

Back-end

	P0	P1	P2	P3	P4	P5	P6	P7	P8	P9	P10	P11	P12	P13	P14	P15
uops	13.50	13.50	13.50	13.50	13.50	13.50	4.00	4.00	4.00	4.00	0.00	0.00	0.00	0.00	0.00	0.00
cycles	13.50	13.50	13.50	13.50	13.50	13.50	4.00	4.00	4.00	4.00	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	12.63
Dispatch	13.50
Overall L1	13.50

Vectorization ratios

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

Vector efficiency ratios

all	6%
load	6%
store	NA (no store vectorizable/vectorized instructions)
mul	6%
add-sub	6%
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 13.50 cycles. At this rate:

1% of peak load performance is reached (2.96 out of 256.00 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: 40a4d0

Instruction	Nb FU	P0	P1	P2	P3	P4	P5	P6	P7	P8	P9	Latency	Recip. throughput	Vectorization
PUSH %RBP	1	0	0	0	0	0	0	0	0	0	0	1	0.50	N/A
MOV %EDX,%EAX	1	0	0	0	0	0	0	0	0	0	0	0	0.17	N/A
MOV 0x8(%RDI),%EDX	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	3	0.25	N/A
MOV %ECX,%R9D	1	0	0	0	0	0	0	0	0	0	0	0	0.17	N/A
MOV %ESI,%R8D	1	0	0	0	0	0	0	0	0	0	0	0	0.17	N/A
MOV (%RDI),%ECX	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	3	0.25	scal (6.3%)
MOV 0x4(%RDI),%ESI	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	3	0.25	N/A
MOV %RSP,%RBP	1	0	0	0	0	0	0	0	0	0	0	0	0.17	scal (12.5%)
CMP %R9D,%EDX	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	1	0.17	scal (6.3%)
JE 40a570 <getBoxFromTuple+0xa0>	1	0	0	0	0.33	0.33	0.33	0	0	0	0	1	0.50-1	N/A
CMP $-0x1,%R9D	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	1	0.17	scal (6.3%)
JE 40a530 <getBoxFromTuple+0x60>	1	0	0	0	0.33	0.33	0.33	0	0	0	0	1	0.50-1	N/A
CMP %ESI,%EAX	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	1	0.17	scal (6.3%)
JE 40a5c0 <getBoxFromTuple+0xf0>	1	0	0	0	0.33	0.33	0.33	0	0	0	0	1	0.50-1	N/A
CMP $-0x1,%EAX	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	1	0.17	scal (6.3%)
JE 40a5a0 <getBoxFromTuple+0xd0>	1	0	0	0	0.33	0.33	0.33	0	0	0	0	1	0.50-1	N/A
CMP %ECX,%R8D	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	1	0.17	scal (6.3%)
JE 40a5f0 <getBoxFromTuple+0x120>	1	0	0	0	0.33	0.33	0.33	0	0	0	0	1	0.50-1	N/A
CMP $-0x1,%R8D	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	1	0.17	scal (6.3%)
JE 40a610 <getBoxFromTuple+0x140>	1	0	0	0	0.33	0.33	0.33	0	0	0	0	1	0.50-1	N/A
IMUL %ECX,%ESI	1	0.33	0.33	0.33	0	0	0	0	0	0	0	3	0.33	N/A
IMUL %ECX,%EAX	1	0.33	0.33	0.33	0	0	0	0	0	0	0	3	0.33	N/A
IMUL %R9D,%ESI	1	0.33	0.33	0.33	0	0	0	0	0	0	0	3	0.33	N/A
ADD %R8D,%EAX	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	1	0.17	N/A
ADD %ESI,%EAX	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	1	0.17	N/A
JMP 40a551 <getBoxFromTuple+0x81>	1	0	0	0	0.33	0.33	0.33	0	0	0	0	0	1	N/A
NOPL (%RAX,%RAX,1)	0	0	0	0	0	0	0	0	0	0	0	0	0.09	N/A
MOV 0xc(%RDI),%R9D	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	3	0.25	N/A
IMUL %EDX,%ESI	1	0.33	0.33	0.33	0	0	0	0	0	0	0	3	0.33	N/A
ADD $0x2,%ECX	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	1	0.17	scal (6.3%)
INC %EAX	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	1	0.17	N/A
IMUL %ECX,%EDX	1	0.33	0.33	0.33	0	0	0	0	0	0	0	3	0.33	N/A
IMUL %ECX,%EAX	1	0.33	0.33	0.33	0	0	0	0	0	0	0	3	0.33	N/A
LEA (%R9,%RSI,2),%R10D	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	1	0.25	N/A
LEA (%R10,%RDX,2),%EDX	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	1	0.25	N/A
ADD %EDX,%EAX	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	1	0.17	N/A
LEA 0x1(%R8,%RAX,1),%EAX	2	0	0	0.50	0.50	0	0	0.25	0.25	0.25	0.25	2	0.50	N/A
TEST %EAX,%EAX	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	1	0.17	scal (6.3%)
JS 40a61e <getBoxFromTuple+0x14e>	1	0	0	0	0.33	0.33	0.33	0	0	0	0	1	0.50-1	N/A
CMP %EAX,0x14(%RDI)	1	0.17	0.17	0.17	0.17	0.17	0.17	0.25	0.25	0.25	0.25	1	0.25	scal (6.3%)
JLE 40a637 <getBoxFromTuple+0x167>	1	0	0	0	0.33	0.33	0.33	0	0	0	0	1	0.50-1	N/A
POP %RBP	1	0	0	0	0	0	0	0	0	0	0	1	0.33	N/A
RET	1	0	0	0	0.33	0.33	0.33	0	0	0	0	1	0.50	N/A
NOPW %CS:(%RAX,%RAX,1)	0	0	0	0	0	0	0	0	0	0	0	0	0.09	N/A
NOP	0	0	0	0	0	0	0	0	0	0	0	0	0.09	N/A
MOV 0xc(%RDI),%R9D	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	3	0.25	N/A
MOV %EDX,%R11D	1	0	0	0	0	0	0	0	0	0	0	0	0.17	N/A
ADD $0x2,%ECX	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	1	0.17	scal (6.3%)
INC %EAX	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	1	0.17	N/A
IMUL %ESI,%R11D	1	0.33	0.33	0.33	0	0	0	0	0	0	0	3	0.33	N/A
ADD $0x2,%ESI	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	1	0.17	N/A
IMUL %ECX,%EDX	1	0.33	0.33	0.33	0	0	0	0	0	0	0	3	0.33	N/A
IMUL %ECX,%ESI	1	0.33	0.33	0.33	0	0	0	0	0	0	0	3	0.33	N/A
IMUL %ECX,%EAX	1	0.33	0.33	0.33	0	0	0	0	0	0	0	3	0.33	N/A
LEA (%R9,%R11,2),%R10D	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	1	0.25	N/A
LEA (%R10,%RDX,2),%EDX	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	1	0.25	N/A
ADD %EDX,%ESI	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	1	0.17	N/A
ADD %ESI,%EAX	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	1	0.17	N/A
LEA 0x1(%R8,%RAX,1),%EAX	2	0	0	0.50	0.50	0	0	0.25	0.25	0.25	0.25	2	0.50	N/A
JMP 40a551 <getBoxFromTuple+0x81>	1	0	0	0	0.33	0.33	0.33	0	0	0	0	0	1	N/A
NOP	0	0	0	0	0	0	0	0	0	0	0	0	0.09	N/A
MOV 0xc(%RDI),%EAX	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	3	0.25	N/A
IMUL %ESI,%EDX	1	0.33	0.33	0.33	0	0	0	0	0	0	0	3	0.33	N/A
ADD $0x2,%ECX	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	1	0.17	scal (6.3%)
IMUL %R9D,%ECX	1	0.33	0.33	0.33	0	0	0	0	0	0	0	3	0.33	scal (6.3%)
LEA (%RAX,%RDX,2),%R10D	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	1	0.25	N/A
ADD %ECX,%R10D	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	1	0.17	N/A
LEA 0x1(%R8,%R10,1),%EAX	2	0	0	0.50	0.50	0	0	0.25	0.25	0.25	0.25	2	0.50	N/A
JMP 40a551 <getBoxFromTuple+0x81>	1	0	0	0	0.33	0.33	0.33	0	0	0	0	0	1	N/A
NOPL (%RAX,%RAX,1)	0	0	0	0	0	0	0	0	0	0	0	0	0.09	N/A
MOV 0xc(%RDI),%R11D	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	3	0.25	N/A
IMUL %EDX,%EAX	1	0.33	0.33	0.33	0	0	0	0	0	0	0	3	0.33	N/A
ADD $0x2,%ECX	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	1	0.17	scal (6.3%)
IMUL %ECX,%EDX	1	0.33	0.33	0.33	0	0	0	0	0	0	0	3	0.33	N/A
IMUL %R9D,%ECX	1	0.33	0.33	0.33	0	0	0	0	0	0	0	3	0.33	scal (6.3%)
LEA (%R11,%RAX,2),%ESI	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	1	0.25	N/A
ADD %ESI,%EDX	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	1	0.17	N/A
ADD %ECX,%EDX	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	1	0.17	N/A
LEA 0x1(%R8,%RDX,1),%EAX	2	0	0	0.50	0.50	0	0	0.25	0.25	0.25	0.25	2	0.50	N/A
JMP 40a551 <getBoxFromTuple+0x81>	1	0	0	0	0.33	0.33	0.33	0	0	0	0	0	1	N/A
NOPW %CS:(%RAX,%RAX,1)	0	0	0	0	0	0	0	0	0	0	0	0	0.09	N/A
XCHG %AX,%AX	0	0	0	0	0	0	0	0	0	0	0	0	0.09	N/A
IMUL %ESI,%EDX	1	0.33	0.33	0.33	0	0	0	0	0	0	0	3	0.33	N/A
ADD 0xc(%RDI),%EDX	1	0.17	0.17	0.17	0.17	0.17	0.17	0.25	0.25	0.25	0.25	1	0.25	N/A
IMUL %R9D,%ESI	1	0.33	0.33	0.33	0	0	0	0	0	0	0	3	0.33	N/A
ADD %ESI,%EDX	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	1	0.17	N/A
ADD %EDX,%EAX	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	1	0.17	N/A
JMP 40a551 <getBoxFromTuple+0x81>	1	0	0	0	0.33	0.33	0.33	0	0	0	0	0	1	N/A
NOPW %CS:(%RAX,%RAX,1)	0	0	0	0	0	0	0	0	0	0	0	0	0.09	N/A
XCHG %AX,%AX	0	0	0	0	0	0	0	0	0	0	0	0	0.09	N/A
IMUL %R9D,%ESI	1	0.33	0.33	0.33	0	0	0	0	0	0	0	3	0.33	N/A
ADD 0xc(%RDI),%ESI	1	0.17	0.17	0.17	0.17	0.17	0.17	0.25	0.25	0.25	0.25	1	0.25	N/A
ADD %ESI,%EAX	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	1	0.17	N/A
JMP 40a551 <getBoxFromTuple+0x81>	1	0	0	0	0.33	0.33	0.33	0	0	0	0	0	1	N/A
MOV $0x410eb0,%ECX	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	1	0.17	scal (6.3%)
MOV $0xf6,%EDX	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	1	0.17	N/A
MOV $0x410d98,%ESI	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	1	0.17	N/A
MOV $0x410e67,%EDI	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	1	0.17	N/A
CALL 4030c0 <__assert_fail@plt>	2	0	0	0	0.33	0.33	0.33	0.25	0.25	0.25	0.25	0	0.50	N/A
MOV $0x410eb0,%ECX	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	1	0.17	scal (6.3%)
MOV $0xf7,%EDX	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	1	0.17	N/A
MOV $0x410d98,%ESI	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	1	0.17	N/A
MOV $0x410e71,%EDI	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	1	0.17	N/A
CALL 4030c0 <__assert_fail@plt>	2	0	0	0	0.33	0.33	0.33	0.25	0.25	0.25	0.25	0	0.50	N/A

The code analyzed by CQA in that panel excludes loops and represents 0.01% of application time for run gcc_10

Source file and lines	linkCells.c:204-250
Module	exec

The function is defined in /home/eoseret/qaas_runs_ZEN5/174-043-3878/intel/CoMD/build/CoMD/CoMD/src-openmp/linkCells.c:204-250.

Warnings:

Ignoring paths for analysis
Too many paths. Rerun with max-paths=21

hoisting them (moving them outside the function)
turning them into conditional moves, MIN or MAX

Ex: if (x<0) x=0 => x = (x<0 ? 0 : x) (or MAX(0,x) after defining the corresponding macro)

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): for(i) a[i].x = b[i].x; (slow, non stride 1) => for(i) a.x[i] = b.x[i]; (fast, stride 1)

Execution units bottlenecks

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

No data for this section

CALL instructions

Detected function call instructions.

Details

__assert_fail@plt: 2 occurrences►
- /home/eoseret/qaas_runs_ZEN5/174-043-3878/intel/CoMD/build/CoMD/CoMD/src-openmp/linkCells.c:246
- /home/eoseret/qaas_runs_ZEN5/174-043-3878/intel/CoMD/build/CoMD/CoMD/src-openmp/linkCells.c:247

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.

LEA: 4 occurrences►
- /home/eoseret/qaas_runs_ZEN5/174-043-3878/intel/CoMD/build/CoMD/CoMD/src-openmp/linkCells.c:217
- /home/eoseret/qaas_runs_ZEN5/174-043-3878/intel/CoMD/build/CoMD/CoMD/src-openmp/linkCells.c:211
- /home/eoseret/qaas_runs_ZEN5/174-043-3878/intel/CoMD/build/CoMD/CoMD/src-openmp/linkCells.c:229
- /home/eoseret/qaas_runs_ZEN5/174-043-3878/intel/CoMD/build/CoMD/CoMD/src-openmp/linkCells.c:223

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 40 bytes.

General properties

nb instructions	104
nb uops	101
loop length	384
used x86 registers	11
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	12.63 cycles
front end	12.63 cycles

Back-end

	P0	P1	P2	P3	P4	P5	P6	P7	P8	P9	P10	P11	P12	P13	P14	P15
uops	13.50	13.50	13.50	13.50	13.50	13.50	4.00	4.00	4.00	4.00	0.00	0.00	0.00	0.00	0.00	0.00
cycles	13.50	13.50	13.50	13.50	13.50	13.50	4.00	4.00	4.00	4.00	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	12.63
Dispatch	13.50
Overall L1	13.50

Vectorization ratios

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

Vector efficiency ratios

all	6%
load	6%
store	NA (no store vectorizable/vectorized instructions)
mul	6%
add-sub	6%
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 13.50 cycles. At this rate:

1% of peak load performance is reached (2.96 out of 256.00 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: 40a4d0

Instruction	Nb FU	P0	P1	P2	P3	P4	P5	P6	P7	P8	P9	Latency	Recip. throughput	Vectorization
PUSH %RBP	1	0	0	0	0	0	0	0	0	0	0	1	0.50	N/A
MOV %EDX,%EAX	1	0	0	0	0	0	0	0	0	0	0	0	0.17	N/A
MOV 0x8(%RDI),%EDX	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	3	0.25	N/A
MOV %ECX,%R9D	1	0	0	0	0	0	0	0	0	0	0	0	0.17	N/A
MOV %ESI,%R8D	1	0	0	0	0	0	0	0	0	0	0	0	0.17	N/A
MOV (%RDI),%ECX	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	3	0.25	scal (6.3%)
MOV 0x4(%RDI),%ESI	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	3	0.25	N/A
MOV %RSP,%RBP	1	0	0	0	0	0	0	0	0	0	0	0	0.17	scal (12.5%)
CMP %R9D,%EDX	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	1	0.17	scal (6.3%)
JE 40a570 <getBoxFromTuple+0xa0>	1	0	0	0	0.33	0.33	0.33	0	0	0	0	1	0.50-1	N/A
CMP $-0x1,%R9D	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	1	0.17	scal (6.3%)
JE 40a530 <getBoxFromTuple+0x60>	1	0	0	0	0.33	0.33	0.33	0	0	0	0	1	0.50-1	N/A
CMP %ESI,%EAX	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	1	0.17	scal (6.3%)
JE 40a5c0 <getBoxFromTuple+0xf0>	1	0	0	0	0.33	0.33	0.33	0	0	0	0	1	0.50-1	N/A
CMP $-0x1,%EAX	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	1	0.17	scal (6.3%)
JE 40a5a0 <getBoxFromTuple+0xd0>	1	0	0	0	0.33	0.33	0.33	0	0	0	0	1	0.50-1	N/A
CMP %ECX,%R8D	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	1	0.17	scal (6.3%)
JE 40a5f0 <getBoxFromTuple+0x120>	1	0	0	0	0.33	0.33	0.33	0	0	0	0	1	0.50-1	N/A
CMP $-0x1,%R8D	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	1	0.17	scal (6.3%)
JE 40a610 <getBoxFromTuple+0x140>	1	0	0	0	0.33	0.33	0.33	0	0	0	0	1	0.50-1	N/A
IMUL %ECX,%ESI	1	0.33	0.33	0.33	0	0	0	0	0	0	0	3	0.33	N/A
IMUL %ECX,%EAX	1	0.33	0.33	0.33	0	0	0	0	0	0	0	3	0.33	N/A
IMUL %R9D,%ESI	1	0.33	0.33	0.33	0	0	0	0	0	0	0	3	0.33	N/A
ADD %R8D,%EAX	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	1	0.17	N/A
ADD %ESI,%EAX	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	1	0.17	N/A
JMP 40a551 <getBoxFromTuple+0x81>	1	0	0	0	0.33	0.33	0.33	0	0	0	0	0	1	N/A
NOPL (%RAX,%RAX,1)	0	0	0	0	0	0	0	0	0	0	0	0	0.09	N/A
MOV 0xc(%RDI),%R9D	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	3	0.25	N/A
IMUL %EDX,%ESI	1	0.33	0.33	0.33	0	0	0	0	0	0	0	3	0.33	N/A
ADD $0x2,%ECX	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	1	0.17	scal (6.3%)
INC %EAX	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	1	0.17	N/A
IMUL %ECX,%EDX	1	0.33	0.33	0.33	0	0	0	0	0	0	0	3	0.33	N/A
IMUL %ECX,%EAX	1	0.33	0.33	0.33	0	0	0	0	0	0	0	3	0.33	N/A
LEA (%R9,%RSI,2),%R10D	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	1	0.25	N/A
LEA (%R10,%RDX,2),%EDX	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	1	0.25	N/A
ADD %EDX,%EAX	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	1	0.17	N/A
LEA 0x1(%R8,%RAX,1),%EAX	2	0	0	0.50	0.50	0	0	0.25	0.25	0.25	0.25	2	0.50	N/A
TEST %EAX,%EAX	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	1	0.17	scal (6.3%)
JS 40a61e <getBoxFromTuple+0x14e>	1	0	0	0	0.33	0.33	0.33	0	0	0	0	1	0.50-1	N/A
CMP %EAX,0x14(%RDI)	1	0.17	0.17	0.17	0.17	0.17	0.17	0.25	0.25	0.25	0.25	1	0.25	scal (6.3%)
JLE 40a637 <getBoxFromTuple+0x167>	1	0	0	0	0.33	0.33	0.33	0	0	0	0	1	0.50-1	N/A
POP %RBP	1	0	0	0	0	0	0	0	0	0	0	1	0.33	N/A
RET	1	0	0	0	0.33	0.33	0.33	0	0	0	0	1	0.50	N/A
NOPW %CS:(%RAX,%RAX,1)	0	0	0	0	0	0	0	0	0	0	0	0	0.09	N/A
NOP	0	0	0	0	0	0	0	0	0	0	0	0	0.09	N/A
MOV 0xc(%RDI),%R9D	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	3	0.25	N/A
MOV %EDX,%R11D	1	0	0	0	0	0	0	0	0	0	0	0	0.17	N/A
ADD $0x2,%ECX	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	1	0.17	scal (6.3%)
INC %EAX	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	1	0.17	N/A
IMUL %ESI,%R11D	1	0.33	0.33	0.33	0	0	0	0	0	0	0	3	0.33	N/A
ADD $0x2,%ESI	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	1	0.17	N/A
IMUL %ECX,%EDX	1	0.33	0.33	0.33	0	0	0	0	0	0	0	3	0.33	N/A
IMUL %ECX,%ESI	1	0.33	0.33	0.33	0	0	0	0	0	0	0	3	0.33	N/A
IMUL %ECX,%EAX	1	0.33	0.33	0.33	0	0	0	0	0	0	0	3	0.33	N/A
LEA (%R9,%R11,2),%R10D	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	1	0.25	N/A
LEA (%R10,%RDX,2),%EDX	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	1	0.25	N/A
ADD %EDX,%ESI	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	1	0.17	N/A
ADD %ESI,%EAX	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	1	0.17	N/A
LEA 0x1(%R8,%RAX,1),%EAX	2	0	0	0.50	0.50	0	0	0.25	0.25	0.25	0.25	2	0.50	N/A
JMP 40a551 <getBoxFromTuple+0x81>	1	0	0	0	0.33	0.33	0.33	0	0	0	0	0	1	N/A
NOP	0	0	0	0	0	0	0	0	0	0	0	0	0.09	N/A
MOV 0xc(%RDI),%EAX	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	3	0.25	N/A
IMUL %ESI,%EDX	1	0.33	0.33	0.33	0	0	0	0	0	0	0	3	0.33	N/A
ADD $0x2,%ECX	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	1	0.17	scal (6.3%)
IMUL %R9D,%ECX	1	0.33	0.33	0.33	0	0	0	0	0	0	0	3	0.33	scal (6.3%)
LEA (%RAX,%RDX,2),%R10D	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	1	0.25	N/A
ADD %ECX,%R10D	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	1	0.17	N/A
LEA 0x1(%R8,%R10,1),%EAX	2	0	0	0.50	0.50	0	0	0.25	0.25	0.25	0.25	2	0.50	N/A
JMP 40a551 <getBoxFromTuple+0x81>	1	0	0	0	0.33	0.33	0.33	0	0	0	0	0	1	N/A
NOPL (%RAX,%RAX,1)	0	0	0	0	0	0	0	0	0	0	0	0	0.09	N/A
MOV 0xc(%RDI),%R11D	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	3	0.25	N/A
IMUL %EDX,%EAX	1	0.33	0.33	0.33	0	0	0	0	0	0	0	3	0.33	N/A
ADD $0x2,%ECX	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	1	0.17	scal (6.3%)
IMUL %ECX,%EDX	1	0.33	0.33	0.33	0	0	0	0	0	0	0	3	0.33	N/A
IMUL %R9D,%ECX	1	0.33	0.33	0.33	0	0	0	0	0	0	0	3	0.33	scal (6.3%)
LEA (%R11,%RAX,2),%ESI	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	1	0.25	N/A
ADD %ESI,%EDX	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	1	0.17	N/A
ADD %ECX,%EDX	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	1	0.17	N/A
LEA 0x1(%R8,%RDX,1),%EAX	2	0	0	0.50	0.50	0	0	0.25	0.25	0.25	0.25	2	0.50	N/A
JMP 40a551 <getBoxFromTuple+0x81>	1	0	0	0	0.33	0.33	0.33	0	0	0	0	0	1	N/A
NOPW %CS:(%RAX,%RAX,1)	0	0	0	0	0	0	0	0	0	0	0	0	0.09	N/A
XCHG %AX,%AX	0	0	0	0	0	0	0	0	0	0	0	0	0.09	N/A
IMUL %ESI,%EDX	1	0.33	0.33	0.33	0	0	0	0	0	0	0	3	0.33	N/A
ADD 0xc(%RDI),%EDX	1	0.17	0.17	0.17	0.17	0.17	0.17	0.25	0.25	0.25	0.25	1	0.25	N/A
IMUL %R9D,%ESI	1	0.33	0.33	0.33	0	0	0	0	0	0	0	3	0.33	N/A
ADD %ESI,%EDX	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	1	0.17	N/A
ADD %EDX,%EAX	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	1	0.17	N/A
JMP 40a551 <getBoxFromTuple+0x81>	1	0	0	0	0.33	0.33	0.33	0	0	0	0	0	1	N/A
NOPW %CS:(%RAX,%RAX,1)	0	0	0	0	0	0	0	0	0	0	0	0	0.09	N/A
XCHG %AX,%AX	0	0	0	0	0	0	0	0	0	0	0	0	0.09	N/A
IMUL %R9D,%ESI	1	0.33	0.33	0.33	0	0	0	0	0	0	0	3	0.33	N/A
ADD 0xc(%RDI),%ESI	1	0.17	0.17	0.17	0.17	0.17	0.17	0.25	0.25	0.25	0.25	1	0.25	N/A
ADD %ESI,%EAX	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	1	0.17	N/A
JMP 40a551 <getBoxFromTuple+0x81>	1	0	0	0	0.33	0.33	0.33	0	0	0	0	0	1	N/A
MOV $0x410eb0,%ECX	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	1	0.17	scal (6.3%)
MOV $0xf6,%EDX	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	1	0.17	N/A
MOV $0x410d98,%ESI	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	1	0.17	N/A
MOV $0x410e67,%EDI	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	1	0.17	N/A
CALL 4030c0 <__assert_fail@plt>	2	0	0	0	0.33	0.33	0.33	0.25	0.25	0.25	0.25	0	0.50	N/A
MOV $0x410eb0,%ECX	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	1	0.17	scal (6.3%)
MOV $0xf7,%EDX	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	1	0.17	N/A
MOV $0x410d98,%ESI	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	1	0.17	N/A
MOV $0x410e71,%EDI	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	1	0.17	N/A
CALL 4030c0 <__assert_fail@plt>	2	0	0	0	0.33	0.33	0.33	0.25	0.25	0.25	0.25	0	0.50	N/A

Name	Coverage (%)	Time (s)
○getBoxFromTuple	0.16	0.04

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

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