OV - exec - Function ljForce.extracted

	Function: ljForce.extracted	Module: exec	Source: ljForce.c:172-222 [...]	Coverage (incl. loops): 36.57% \| (excl. loops): 0.03%

/beegfs/hackathon/users/eoseret/qaas_runs_test/gmz12.benchmarkcenter.megware.com/177-374-1600/CoMD/build/CoMD/CoMD/src-openmp/ljForce.c: 172 - 222

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

172:    #pragma omp parallel for reduction(+:ePot)

173:    for (int iBox=0; iBox<s->boxes->nLocalBoxes; iBox++)

174:    {

175:       int nIBox = s->boxes->nAtoms[iBox];

176:

177:       // loop over neighbors of iBox

178:       for (int jTmp=0; jTmp<nNbrBoxes; jTmp++)

179:       {

180:          int jBox = s->boxes->nbrBoxes[iBox][jTmp];

181:

182:          assert(jBox>=0);

183:

184:          int nJBox = s->boxes->nAtoms[jBox];

185:

186:          // loop over atoms in iBox

187:          for (int iOff=MAXATOMS*iBox; iOff<(iBox*MAXATOMS+nIBox); iOff++)

188:          {

189:

190:             // loop over atoms in jBox

191:             for (int jOff=jBox*MAXATOMS; jOff<(jBox*MAXATOMS+nJBox); jOff++)

[...]

197:                   dr[m] = s->atoms->r[iOff][m]-s->atoms->r[jOff][m];

198:                   r2+=dr[m]*dr[m];

199:                }

200:

201:                if ( r2 <= rCut2 && r2 > 0.0)

202:                {

203:

204:                   // Important note:

205:                   // from this point on r actually refers to 1.0/r

206:                   r2 = 1.0/r2;

207:                   real_t r6 = s6 * (r2*r2*r2);

208:                   real_t eLocal = r6 * (r6 - 1.0) - eShift;

209:                   s->atoms->U[iOff] += 0.5*eLocal;

210:                   ePot += 0.5*eLocal;

211:

212:                   // different formulation to avoid sqrt computation

213:                   real_t fr = - 4.0*epsilon*r6*r2*(12.0*r6 - 6.0);

214:                   for (int m=0; m<3; m++)

215:                   {

216:                      s->atoms->f[iOff][m] -= dr[m]*fr;

[...]

222:    } // loop over local boxes in system

0x40b600 PUSH	%RBP

0x40b601 MOV	%RSP,%RBP

0x40b604 PUSH	%R15

0x40b606 PUSH	%R14

0x40b608 PUSH	%R13

0x40b60a PUSH	%R12

0x40b60c PUSH	%RBX

0x40b60d SUB	$0x58,%RSP

0x40b611 MOVL	$0,-0x44(%RBP)

0x40b618 MOV	0x28(%RBP),%EAX

0x40b61b MOV	%R9,%R14

0x40b61e MOV	%R8,%R13

0x40b621 MOV	%RCX,%R12

0x40b624 MOV	%RDX,-0x58(%RBP)

0x40b628 MOV	%RDI,-0x68(%RBP)

0x40b62c MOV	(%RDI),%ESI

0x40b62e MOVL	$0,-0x30(%RBP)

0x40b635 MOVL	$0x1,-0x40(%RBP)

0x40b63c MOV	%EAX,-0x2c(%RBP)

0x40b63f SUB	$0x8,%RSP

0x40b643 LEA	-0x44(%RBP),%RCX

0x40b647 LEA	-0x40(%RBP),%RAX

0x40b64b LEA	-0x30(%RBP),%R8

0x40b64f LEA	-0x2c(%RBP),%R9

0x40b653 MOV	$0x42c750,%EDI

0x40b658 MOV	%ESI,-0x3c(%RBP)

0x40b65b MOV	$0x22,%EDX

0x40b660 PUSH	$0x1

0x40b662 PUSH	$0x1

0x40b664 PUSH	%RAX

0x40b665 CALL	403250 <__kmpc_for_static_init_4@plt>

0x40b66a ADD	$0x20,%RSP

0x40b66e MOV	-0x2c(%RBP),%EAX

0x40b671 MOV	-0x30(%RBP),%ECX

0x40b674 VXORPD	%XMM5,%XMM5,%XMM5

0x40b678 MOV	%RAX,-0x50(%RBP)

0x40b67c CMP	%EAX,%ECX

0x40b67e JBE	40b6fe

0x40b680 MOV	-0x3c(%RBP),%ESI

0x40b683 MOV	0x30(%RBP),%R15

0x40b687 MOV	$0x42c770,%EDI

0x40b68c VMOVSD	%XMM5,-0x38(%RBP)

0x40b691 CALL	403320 <__kmpc_for_static_fini@plt>

0x40b696 MOV	-0x68(%RBP),%RBX

0x40b69a MOV	(%RBX),%ESI

0x40b69c SUB	$0x8,%RSP

0x40b6a0 MOV	$0x4306e0,%RAX

0x40b6a7 LEA	-0x38(%RBP),%R8

0x40b6ab MOV	$0x42c7b0,%EDI

0x40b6b0 MOV	$0x40b5f0,%R9D

0x40b6b6 MOV	$0x1,%EDX

0x40b6bb MOV	$0x8,%ECX

0x40b6c0 PUSH	%RAX

0x40b6c1 CALL	403030 <__kmpc_reduce@plt>

0x40b6c6 ADD	$0x10,%RSP

0x40b6ca CMP	$0x2,%EAX

0x40b6cd JE	40b9ed

0x40b6d3 CMP	$0x1,%EAX

0x40b6d6 JNE	40ba14

0x40b6dc VMOVSD	-0x38(%RBP),%XMM0

0x40b6e1 MOV	$0x4306e0,%RDX

0x40b6e8 MOV	$0x42c7d0,%EDI

0x40b6ed VADDSD	(%R15),%XMM0,%XMM0

0x40b6f2 VMOVSD	%XMM0,(%R15)

0x40b6f7 MOV	(%RBX),%ESI

0x40b6f9 JMP	40ba0f

0x40b6fe MOV	-0x58(%RBP),%RAX

0x40b702 VMOVQ	%R12,%XMM3

0x40b707 VMULSD	0x16141(%RIP),%XMM3,%XMM3

0x40b70f VMOVSD	0x10(%RBP),%XMM0

0x40b714 VMOVSD	0x13b24(%RIP),%XMM6

0x40b71c VMOVSD	0x14ff4(%RIP),%XMM7

0x40b724 VMOVSD	0x1612c(%RIP),%XMM8

0x40b72c VMOVSD	0x1612c(%RIP),%XMM9

0x40b734 VMOVSD	0x1612c(%RIP),%XMM10

0x40b73c INCQ	-0x50(%RBP)

0x40b740 MOV	%ECX,%EDI

0x40b742 VMOVQ	%R14,%XMM1

0x40b747 VMOVQ	%R13,%XMM2

0x40b74c SAL	$0x6,%EDI

0x40b74f VXORPD	%XMM4,%XMM4,%XMM4

0x40b753 MOV	0x18(%RAX),%RAX

0x40b757 MOV	0x78(%RAX),%RDX

0x40b75b MOV	0x80(%RAX),%RAX

0x40b762 MOV	%RDX,-0x60(%RBP)

0x40b766 MOV	%RAX,-0x70(%RBP)

0x40b76a JMP	40b784

0x40b76c NOPL	(%RAX)

(94) 0x40b770 MOV	-0x78(%RBP),%RCX

(94) 0x40b774 ADD	$0x40,%EDI

(94) 0x40b777 INC	%RCX

(94) 0x40b77a CMP	-0x50(%RBP),%RCX

(94) 0x40b77e JE	40b680

(94) 0x40b784 MOV	-0x60(%RBP),%RAX

(94) 0x40b788 MOV	-0x70(%RBP),%RDX

(94) 0x40b78c MOV	%EDI,%EDI

(94) 0x40b78e MOV	%RCX,-0x78(%RBP)

(94) 0x40b792 MOV	(%RAX,%RCX,4),%EAX

(94) 0x40b795 MOV	(%RDX,%RCX,8),%R8

(94) 0x40b799 TEST	%EAX,%EAX

(94) 0x40b79b JLE	40b8f0

(94) 0x40b7a1 SAL	$0x6,%ECX

(94) 0x40b7a4 LEA	0x1(%RDI),%EDX

(94) 0x40b7a7 MOV	%EDI,%R9D

(94) 0x40b7aa NOT	%R9D

(94) 0x40b7ad ADD	%ECX,%EAX

(94) 0x40b7af CMP	%EDX,%EAX

(94) 0x40b7b1 CMOVLE	%EDX,%EAX

(94) 0x40b7b4 XOR	%R10D,%R10D

(94) 0x40b7b7 ADD	%EAX,%R9D

(94) 0x40b7ba JMP	40b7c9

0x40b7bc NOPL	(%RAX)

  (95) 0x40b7c0 INC	%R10

  (95) 0x40b7c3 CMP	$0x1b,%R10

  (95) 0x40b7c7 JE	40b770

  (95) 0x40b7c9 MOVSXD	(%R8,%R10,4),%RAX

  (95) 0x40b7cd TEST	%RAX,%RAX

  (95) 0x40b7d0 JS	40b9d4

  (95) 0x40b7d6 MOV	-0x60(%RBP),%RCX

  (95) 0x40b7da MOV	(%RCX,%RAX,4),%ECX

  (95) 0x40b7dd TEST	%ECX,%ECX

  (95) 0x40b7df JLE	40b7c0

  (95) 0x40b7e1 MOV	-0x58(%RBP),%RDX

  (95) 0x40b7e5 SAL	$0x6,%EAX

  (95) 0x40b7e8 DEC	%ECX

  (95) 0x40b7ea XOR	%EBX,%EBX

  (95) 0x40b7ec LEA	(%RCX,%RCX,2),%RCX

  (95) 0x40b7f0 LEA	(%RAX,%RAX,2),%RAX

  (95) 0x40b7f4 LEA	0x18(,%RCX,8),%R14

  (95) 0x40b7fc MOV	0x20(%RDX),%R11

  (95) 0x40b800 MOV	0x18(%R11),%R12

  (95) 0x40b804 LEA	0x10(%R12,%RAX,8),%R13

  (95) 0x40b809 JMP	40b81c

0x40b80b NOPL	(%RAX,%RAX,1)

    (96) 0x40b810 LEA	0x1(%RBX),%RAX

    (96) 0x40b814 CMP	%R9,%RBX

    (96) 0x40b817 MOV	%RAX,%RBX

    (96) 0x40b81a JE	40b7c0

    (96) 0x40b81c LEA	(%RBX,%RDI,1),%RSI

    (96) 0x40b820 XOR	%R15D,%R15D

    (96) 0x40b823 LEA	(%RSI,%RSI,2),%RCX

    (96) 0x40b827 LEA	(%R12,%RCX,8),%RAX

    (96) 0x40b82b JMP	40b839

0x40b82d NOPL	(%RAX)

      (97) 0x40b830 ADD	$0x18,%R15

      (97) 0x40b834 CMP	%R15,%R14

      (97) 0x40b837 JE	40b810

      (97) 0x40b839 VMOVUPD	(%RAX),%XMM11

      (97) 0x40b83d VMOVSD	0x10(%RAX),%XMM12

      (97) 0x40b842 VSUBPD	-0x10(%R13,%R15,1),%XMM11,%XMM11

      (97) 0x40b849 VSUBSD	(%R13,%R15,1),%XMM12,%XMM12

      (97) 0x40b850 VMULPD	%XMM11,%XMM11,%XMM13

      (97) 0x40b855 VSHUFPD	$0x1,%XMM13,%XMM13,%XMM14

      (97) 0x40b85b VADDSD	%XMM14,%XMM13,%XMM13

      (97) 0x40b860 VFMADD231SD	%XMM12,%XMM12,%XMM13

      (97) 0x40b865 VUCOMISD	%XMM13,%XMM2

      (97) 0x40b86a JB	40b830

      (97) 0x40b86c VUCOMISD	%XMM4,%XMM13

      (97) 0x40b870 JBE	40b830

      (97) 0x40b872 VDIVSD	%XMM13,%XMM6,%XMM13

      (97) 0x40b877 MOV	0x30(%R11),%RDX

      (97) 0x40b87b VMULSD	%XMM13,%XMM13,%XMM14

      (97) 0x40b880 VMULSD	%XMM1,%XMM13,%XMM15

      (97) 0x40b884 VMULSD	%XMM3,%XMM13,%XMM13

      (97) 0x40b888 VMULSD	%XMM15,%XMM14,%XMM14

      (97) 0x40b88d VADDSD	%XMM7,%XMM14,%XMM15

      (97) 0x40b891 VMULSD	%XMM14,%XMM13,%XMM13

      (97) 0x40b896 VFNMADD213SD	%XMM0,%XMM14,%XMM15

      (97) 0x40b89b VMULSD	%XMM8,%XMM15,%XMM15

      (97) 0x40b8a0 VADDSD	(%RDX,%RSI,8),%XMM15,%XMM16

      (97) 0x40b8a7 VADDSD	%XMM5,%XMM15,%XMM5

      (97) 0x40b8ab VMOVSD	%XMM16,(%RDX,%RSI,8)

      (97) 0x40b8b2 VMOVAPD	%XMM9,%XMM16

      (97) 0x40b8b8 VFMADD213SD	%XMM10,%XMM14,%XMM16

      (97) 0x40b8be MOV	0x28(%R11),%RDX

      (97) 0x40b8c2 VMULSD	%XMM16,%XMM13,%XMM13

      (97) 0x40b8c8 VMOVDDUP	%XMM13,%XMM14

      (97) 0x40b8cd VFMADD213PD	(%RDX,%RCX,8),%XMM14,%XMM11

      (97) 0x40b8d3 VMOVUPD	%XMM11,(%RDX,%RCX,8)

      (97) 0x40b8d8 VFMADD213SD	0x10(%RDX,%RCX,8),%XMM13,%XMM12

      (97) 0x40b8df VMOVSD	%XMM12,0x10(%RDX,%RCX,8)

      (97) 0x40b8e5 JMP	40b830

0x40b8ea NOPW	(%RAX,%RAX,1)

(94) 0x40b8f0 CMPL	$0,(%R8)

(94) 0x40b8f4 JS	40b9d4

(94) 0x40b8fa CMPL	$0,0x4(%R8)

(94) 0x40b8ff JS	40b9d4

(94) 0x40b905 CMPL	$0,0x8(%R8)

(94) 0x40b90a JS	40b9d4

(94) 0x40b910 CMPL	$0,0xc(%R8)

(94) 0x40b915 JS	40b9d4

(94) 0x40b91b CMPL	$0,0x10(%R8)

(94) 0x40b920 JS	40b9d4

(94) 0x40b926 CMPL	$0,0x14(%R8)

(94) 0x40b92b JS	40b9d4

(94) 0x40b931 CMPL	$0,0x18(%R8)

(94) 0x40b936 JS	40b9d4

(94) 0x40b93c CMPL	$0,0x1c(%R8)

(94) 0x40b941 JS	40b9d4

(94) 0x40b947 CMPL	$0,0x20(%R8)

(94) 0x40b94c JS	40b9d4

(94) 0x40b952 CMPL	$0,0x24(%R8)

(94) 0x40b957 JS	40b9d4

(94) 0x40b959 CMPL	$0,0x28(%R8)

(94) 0x40b95e JS	40b9d4

(94) 0x40b960 CMPL	$0,0x2c(%R8)

(94) 0x40b965 JS	40b9d4

(94) 0x40b967 CMPL	$0,0x30(%R8)

(94) 0x40b96c JS	40b9d4

(94) 0x40b96e CMPL	$0,0x34(%R8)

(94) 0x40b973 JS	40b9d4

(94) 0x40b975 CMPL	$0,0x38(%R8)

(94) 0x40b97a JS	40b9d4

(94) 0x40b97c CMPL	$0,0x3c(%R8)

(94) 0x40b981 JS	40b9d4

(94) 0x40b983 CMPL	$0,0x40(%R8)

(94) 0x40b988 JS	40b9d4

(94) 0x40b98a CMPL	$0,0x44(%R8)

(94) 0x40b98f JS	40b9d4

(94) 0x40b991 CMPL	$0,0x48(%R8)

(94) 0x40b996 JS	40b9d4

(94) 0x40b998 CMPL	$0,0x4c(%R8)

(94) 0x40b99d JS	40b9d4

(94) 0x40b99f CMPL	$0,0x50(%R8)

(94) 0x40b9a4 JS	40b9d4

(94) 0x40b9a6 CMPL	$0,0x54(%R8)

(94) 0x40b9ab JS	40b9d4

(94) 0x40b9ad CMPL	$0,0x58(%R8)

(94) 0x40b9b2 JS	40b9d4

(94) 0x40b9b4 CMPL	$0,0x5c(%R8)

(94) 0x40b9b9 JS	40b9d4

(94) 0x40b9bb CMPL	$0,0x60(%R8)

(94) 0x40b9c0 JS	40b9d4

(94) 0x40b9c2 CMPL	$0,0x64(%R8)

(94) 0x40b9c7 JS	40b9d4

(94) 0x40b9c9 CMPL	$0,0x68(%R8)

(94) 0x40b9ce JNS	40b770

0x40b9d4 MOV	$0x421873,%EDI

0x40b9d9 MOV	$0x42187b,%ESI

0x40b9de MOV	$0x421903,%ECX

0x40b9e3 MOV	$0xb6,%EDX

0x40b9e8 CALL	403070 <__assert_fail@plt>

0x40b9ed VMOVSD	-0x38(%RBP),%XMM0

0x40b9f2 MOV	(%RBX),%ESI

0x40b9f4 MOV	$0x42c790,%EDI

0x40b9f9 MOV	%R15,%RDX

0x40b9fc CALL	4031b0 <__kmpc_atomic_float8_add@plt>

0x40ba01 MOV	(%RBX),%ESI

0x40ba03 MOV	$0x4306e0,%RDX

0x40ba0a MOV	$0x42c7f0,%EDI

0x40ba0f CALL	403280 <__kmpc_end_reduce@plt>

0x40ba14 ADD	$0x58,%RSP

0x40ba18 POP	%RBX

0x40ba19 POP	%R12

0x40ba1b POP	%R13

0x40ba1d POP	%R14

0x40ba1f POP	%R15

0x40ba21 POP	%RBP

0x40ba22 RET

0x40ba23 NOPW	%CS:(%RAX,%RAX,1)

Coverage (%)	Name	Source Location	Module
►99.98+	__kmp_invoke_microtask		libiomp5.so
○	__kmp_invoke_task_func		libiomp5.so

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 icx_0

Source file and lines	ljForce.c:172-222
Module	exec

The function is defined in /beegfs/hackathon/users/eoseret/qaas_runs_test/gmz12.benchmarkcenter.megware.com/177-374-1600/CoMD/build/CoMD/CoMD/src-openmp/ljForce.c:172-191,197-216,222.

Warnings:
Ignoring paths for analysis

gain
potential
hint
expert

Code clean check

Detected a slowdown caused by scalar integer instructions (typically used for address computation). By removing them, you can lower the cost of an iteration from 14.38 to 3.25 cycles (4.42x speedup).

Workaround

Try to reorganize arrays of structures to structures of arrays
Consider to permute loops (see vectorization gain report)

Vectorization

Your function is probably not vectorized. Only 10% 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 14.38 to 1.05 cycles (13.73x speedup).

Details

Store and arithmetical 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.

FMA

Presence of both ADD/SUB and MUL operations.

Workaround

Pass to your compiler a micro-architecture specialization option:
- use march=native
Try to change order in which elements are evaluated (using parentheses) in arithmetic expressions containing both ADD/SUB and MUL operations to enable your compiler to generate FMA instructions wherever possible. For instance a + b*c is a valid FMA (MUL then ADD). However (a+b)* c cannot be translated into an FMA (ADD then MUL).

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: 1 occurrences►
- /beegfs/hackathon/users/eoseret/qaas_runs_test/gmz12.benchmarkcenter.megware.com/177-374-1600/CoMD/build/CoMD/CoMD/src-openmp/ljForce.c:182
__kmpc_atomic_float8_add@plt: 1 occurrences►
- /beegfs/hackathon/users/eoseret/qaas_runs_test/gmz12.benchmarkcenter.megware.com/177-374-1600/CoMD/build/CoMD/CoMD/src-openmp/ljForce.c:172
__kmpc_end_reduce@plt: 1 occurrences►
- /beegfs/hackathon/users/eoseret/qaas_runs_test/gmz12.benchmarkcenter.megware.com/177-374-1600/CoMD/build/CoMD/CoMD/src-openmp/ljForce.c:172
__kmpc_for_static_fini@plt: 1 occurrences►
- /beegfs/hackathon/users/eoseret/qaas_runs_test/gmz12.benchmarkcenter.megware.com/177-374-1600/CoMD/build/CoMD/CoMD/src-openmp/ljForce.c:172
__kmpc_for_static_init_4@plt: 1 occurrences►
- /beegfs/hackathon/users/eoseret/qaas_runs_test/gmz12.benchmarkcenter.megware.com/177-374-1600/CoMD/build/CoMD/CoMD/src-openmp/ljForce.c:172
__kmpc_reduce@plt: 1 occurrences►
- /beegfs/hackathon/users/eoseret/qaas_runs_test/gmz12.benchmarkcenter.megware.com/177-374-1600/CoMD/build/CoMD/CoMD/src-openmp/ljForce.c:172

Type of elements and instruction set

2 SSE or AVX instructions are processing arithmetic or math operations on double precision FP elements in scalar mode (one at a time).

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

The binary function is composed of 2 FP arithmetical operations:

1: addition or subtraction
1: multiply

The binary function is loading 172 bytes (21 double precision FP elements). The binary function is storing 84 bytes (10 double precision FP elements).

Arithmetic intensity

Arithmetic intensity is 0.01 FP operations per loaded or stored byte.

General properties

nb instructions	115
nb uops	115
loop length	478
used x86 registers	14
used mmx registers	0
used xmm registers	11
used ymm registers	0
used zmm registers	0
nb stack references	14
ADD-SUB / MUL ratio	1.00

Front-end

MACRO FUSION NOT POSSIBLE FIT IN UOP CACHE

micro-operation queue	14.38 cycles
front end	14.38 cycles

Back-end

	P0	P1	P2	P3	P4	P5	P6	P7	P8	P9	P10	P11	P12	P13	P14	P15
uops	8.00	8.00	8.00	8.00	8.00	8.00	11.00	11.00	11.00	11.00	0.50	0.50	0.50	0.50	1.00	1.00
cycles	8.00	8.00	8.00	8.00	8.00	8.00	11.00	11.00	11.00	11.00	0.50	0.50	0.50	0.50	1.00	1.00

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	14.38
Dispatch	11.00
Overall L1	14.38

Vectorization ratios

INT

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

all	14%
load	0%
store	0%
mul	0%
add-sub	0%
fma	NA (no fma vectorizable/vectorized instructions)
div/sqrt	NA (no div/sqrt vectorizable/vectorized instructions)
other	100%

INT+FP

all	3%
load	0%
store	0%
mul	0%
add-sub	0%
fma	NA (no fma vectorizable/vectorized instructions)
div/sqrt	NA (no div/sqrt vectorizable/vectorized instructions)
other	9%

Vector efficiency ratios

INT

all	8%
load	7%
store	9%
mul	NA (no mul vectorizable/vectorized instructions)
add-sub	NA (no add-sub vectorizable/vectorized instructions)
fma	NA (no fma vectorizable/vectorized instructions)
other	8%

all	14%
load	12%
store	12%
mul	12%
add-sub	12%
fma	NA (no fma vectorizable/vectorized instructions)
div/sqrt	NA (no div/sqrt vectorizable/vectorized instructions)
other	25%

INT+FP

all	10%
load	10%
store	10%
mul	12%
add-sub	12%
fma	NA (no fma vectorizable/vectorized instructions)
div/sqrt	NA (no div/sqrt vectorizable/vectorized instructions)
other	10%

Cycles and memory resources usage

Assuming all data fit into the L1 cache, each call to the function takes 14.38 cycles. At this rate:

4% of peak load performance is reached (11.97 out of 256.00 bytes loaded per cycle (GB/s @ 1GHz))
4% of peak store performance is reached (5.84 out of 128.00 bytes stored per cycle (GB/s @ 1GHz))

Front-end bottlenecks

Performance is limited by instruction throughput (loading/decoding program instructions to execution core) (front-end is a bottleneck). By removing all these bottlenecks, you can lower the cost of an iteration from 14.38 to 11.00 cycles (1.31x speedup).

ASM code

In the binary file, the address of the function is: 40b600

Instruction	Nb FU	P0	P1	P2	P3	P4	P5	P6	P7	P8	P9	P10	P11	P12	P13	P14	P15	Latency	Recip. throughput	Vectorization
PUSH %RBP	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.50	N/A
MOV %RSP,%RBP	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	N/A
PUSH %R15	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.50	N/A
PUSH %R14	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.50	N/A
PUSH %R13	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.50	N/A
PUSH %R12	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.50	N/A
PUSH %RBX	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.50	N/A
SUB $0x58,%RSP	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	0	1	0.17	N/A
MOVL $0,-0x44(%RBP)	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	4	0.50	scal (6.3%)
MOV 0x28(%RBP),%EAX	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	3	0.25	N/A
MOV %R9,%R14	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	scal (12.5%)
MOV %R8,%R13	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	scal (12.5%)
MOV %RCX,%R12	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	scal (12.5%)
MOV %RDX,-0x58(%RBP)	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	4	0.50	scal (12.5%)
MOV %RDI,-0x68(%RBP)	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	4	0.50	scal (12.5%)
MOV (%RDI),%ESI	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	3	0.25	scal (6.3%)
MOVL $0,-0x30(%RBP)	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	4	0.50	scal (6.3%)
MOVL $0x1,-0x40(%RBP)	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	4	0.50	scal (6.3%)
MOV %EAX,-0x2c(%RBP)	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	4	0.50	scal (6.3%)
SUB $0x8,%RSP	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	0	1	0.17	N/A
LEA -0x44(%RBP),%RCX	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	0	1	0.17	N/A
LEA -0x40(%RBP),%RAX	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	0	1	0.17	N/A
LEA -0x30(%RBP),%R8	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	0	1	0.17	N/A
LEA -0x2c(%RBP),%R9	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	0	1	0.17	N/A
MOV $0x42c750,%EDI	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	0	1	0.17	N/A
MOV %ESI,-0x3c(%RBP)	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	4	0.50	scal (6.3%)
MOV $0x22,%EDX	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	0	1	0.17	scal (6.3%)
PUSH $0x1	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.50	N/A
PUSH $0x1	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.50	N/A
PUSH %RAX	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.50	N/A
CALL 403250 <__kmpc_for_static_init_4@plt>	2	0	0	0	0.33	0.33	0.33	0.25	0.25	0.25	0.25	0	0	0	0	0	0	0	0.50	N/A
ADD $0x20,%RSP	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	0	1	0.17	N/A
MOV -0x2c(%RBP),%EAX	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	3	0.25	N/A
MOV -0x30(%RBP),%ECX	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	3	0.25	scal (6.3%)
VXORPD %XMM5,%XMM5,%XMM5	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	vect (25.0%)
MOV %RAX,-0x50(%RBP)	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	4	0.50	scal (12.5%)
CMP %EAX,%ECX	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	0	1	0.17	scal (6.3%)
JBE 40b6fe <ljForce.extracted+0xfe>	1	0	0	0	0.33	0.33	0.33	0	0	0	0	0	0	0	0	0	0	0	0.33-1	N/A
MOV -0x3c(%RBP),%ESI	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	3	0.25	scal (6.3%)
MOV 0x30(%RBP),%R15	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	3	0.25	N/A
MOV $0x42c770,%EDI	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	0	1	0.17	N/A
VMOVSD %XMM5,-0x38(%RBP)	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0.50	0.50	1	0.50	scal (12.5%)
CALL 403320 <__kmpc_for_static_fini@plt>	2	0	0	0	0.33	0.33	0.33	0.25	0.25	0.25	0.25	0	0	0	0	0	0	0	0.50	N/A
MOV -0x68(%RBP),%RBX	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	3	0.25	N/A
MOV (%RBX),%ESI	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	3	0.25	scal (6.3%)
SUB $0x8,%RSP	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	0	1	0.17	N/A
MOV $0x4306e0,%RAX	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	0	1	0.17	N/A
LEA -0x38(%RBP),%R8	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	0	1	0.17	N/A
MOV $0x42c7b0,%EDI	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	0	1	0.17	N/A
MOV $0x40b5f0,%R9D	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	0	1	0.17	scal (6.3%)
MOV $0x1,%EDX	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	0	1	0.17	scal (6.3%)
MOV $0x8,%ECX	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	0	1	0.17	scal (6.3%)
PUSH %RAX	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.50	N/A
CALL 403030 <__kmpc_reduce@plt>	2	0	0	0	0.33	0.33	0.33	0.25	0.25	0.25	0.25	0	0	0	0	0	0	0	0.50	N/A
ADD $0x10,%RSP	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	0	1	0.17	N/A
CMP $0x2,%EAX	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	0	1	0.17	scal (6.3%)
JE 40b9ed <ljForce.extracted+0x3ed>	1	0	0	0	0.33	0.33	0.33	0	0	0	0	0	0	0	0	0	0	0	0.33-1	N/A
CMP $0x1,%EAX	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	0	1	0.17	scal (6.3%)
JNE 40ba14 <ljForce.extracted+0x414>	1	0	0	0	0.33	0.33	0.33	0	0	0	0	0	0	0	0	0	0	0	0.33-1	N/A
VMOVSD -0x38(%RBP),%XMM0	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	1	0.50	scal (12.5%)
MOV $0x4306e0,%RDX	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	0	1	0.17	scal (6.3%)
MOV $0x42c7d0,%EDI	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	0	1	0.17	N/A
VADDSD (%R15),%XMM0,%XMM0	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0.50	0.50	0	0	2	0.50	scal (12.5%)
VMOVSD %XMM0,(%R15)	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0.50	0.50	1	0.50	scal (12.5%)
MOV (%RBX),%ESI	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	3	0.25	scal (6.3%)
JMP 40ba0f <ljForce.extracted+0x40f>	1	0	0	0	0.33	0.33	0.33	0	0	0	0	0	0	0	0	0	0	0	0.50	N/A
MOV -0x58(%RBP),%RAX	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	3	0.25	N/A
VMOVQ %R12,%XMM3	1	0	0	1	0	0	0	0	0	0	0	0	0	0	0	0	0	2	1	scal (12.5%)
VMULSD 0x16141(%RIP),%XMM3,%XMM3	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0.50	0.50	0	0	0	0	3	0.50	scal (12.5%)
VMOVSD 0x10(%RBP),%XMM0	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	1	0.50	scal (12.5%)
VMOVSD 0x13b24(%RIP),%XMM6	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	1	0.50	scal (12.5%)
VMOVSD 0x14ff4(%RIP),%XMM7	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	1	0.50	scal (12.5%)
VMOVSD 0x1612c(%RIP),%XMM8	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	1	0.50	scal (12.5%)
VMOVSD 0x1612c(%RIP),%XMM9	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	1	0.50	scal (12.5%)
VMOVSD 0x1612c(%RIP),%XMM10	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	1	0.50	scal (12.5%)
INCQ -0x50(%RBP)	1	0.17	0.17	0.17	0.17	0.17	0.17	0.25	0.25	0.25	0.25	0	0	0	0	0	0	1	0.50	scal (12.5%)
MOV %ECX,%EDI	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	N/A
VMOVQ %R14,%XMM1	1	0	0	1	0	0	0	0	0	0	0	0	0	0	0	0	0	2	1	scal (12.5%)
VMOVQ %R13,%XMM2	1	0	0	1	0	0	0	0	0	0	0	0	0	0	0	0	0	2	1	scal (12.5%)
SAL $0x6,%EDI	1	0	0	0	0.33	0.33	0.33	0	0	0	0	0	0	0	0	0	0	1	0.33	N/A
VXORPD %XMM4,%XMM4,%XMM4	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	vect (25.0%)
MOV 0x18(%RAX),%RAX	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	3	0.25	N/A
MOV 0x78(%RAX),%RDX	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	3	0.25	scal (12.5%)
MOV 0x80(%RAX),%RAX	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	3	0.25	N/A
MOV %RDX,-0x60(%RBP)	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	4	0.50	scal (12.5%)
MOV %RAX,-0x70(%RBP)	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	4	0.50	scal (12.5%)
JMP 40b784 <ljForce.extracted+0x184>	1	0	0	0	0.33	0.33	0.33	0	0	0	0	0	0	0	0	0	0	0	0.50	N/A
NOPL (%RAX)	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0.13	N/A
NOPL (%RAX)	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0.13	N/A
NOPL (%RAX,%RAX,1)	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0.13	N/A
NOPL (%RAX)	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0.13	N/A
NOPW (%RAX,%RAX,1)	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0.13	N/A
MOV $0x421873,%EDI	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	0	1	0.17	N/A
MOV $0x42187b,%ESI	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	0	1	0.17	scal (6.3%)
MOV $0x421903,%ECX	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	0	1	0.17	scal (6.3%)
MOV $0xb6,%EDX	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	0	1	0.17	scal (6.3%)
CALL 403070 <__assert_fail@plt>	2	0	0	0	0.33	0.33	0.33	0.25	0.25	0.25	0.25	0	0	0	0	0	0	0	0.50	N/A
VMOVSD -0x38(%RBP),%XMM0	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	1	0.50	scal (12.5%)
MOV (%RBX),%ESI	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	3	0.25	scal (6.3%)
MOV $0x42c790,%EDI	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	0	1	0.17	N/A
MOV %R15,%RDX	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	scal (12.5%)
CALL 4031b0 <__kmpc_atomic_float8_add@plt>	2	0	0	0	0.33	0.33	0.33	0.25	0.25	0.25	0.25	0	0	0	0	0	0	0	0.50	N/A
MOV (%RBX),%ESI	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	3	0.25	scal (6.3%)
MOV $0x4306e0,%RDX	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	0	1	0.17	scal (6.3%)
MOV $0x42c7f0,%EDI	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	0	1	0.17	N/A
CALL 403280 <__kmpc_end_reduce@plt>	2	0	0	0	0.33	0.33	0.33	0.25	0.25	0.25	0.25	0	0	0	0	0	0	0	0.50	N/A
ADD $0x58,%RSP	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	0	1	0.17	N/A
POP %RBX	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.25	N/A
POP %R12	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.25	N/A
POP %R13	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.25	N/A
POP %R14	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.25	N/A
POP %R15	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.25	N/A
POP %RBP	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.25	N/A
RET	1	0	0	0	0.33	0.33	0.33	0	0	0	0	0	0	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	0	0	0	0	0	0.13	N/A

The code analyzed by CQA in that panel excludes loops and represents 0.03% of application time for run icx_0

Source file and lines	ljForce.c:172-222
Module	exec

gain
potential
hint
expert

Code clean check

Detected a slowdown caused by scalar integer instructions (typically used for address computation). By removing them, you can lower the cost of an iteration from 14.38 to 3.25 cycles (4.42x speedup).

Workaround

Try to reorganize arrays of structures to structures of arrays
Consider to permute loops (see vectorization gain report)

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.

FMA

Presence of both ADD/SUB and MUL operations.

Workaround

Pass to your compiler a micro-architecture specialization option:
- use march=native
Try to change order in which elements are evaluated (using parentheses) in arithmetic expressions containing both ADD/SUB and MUL operations to enable your compiler to generate FMA instructions wherever possible. For instance a + b*c is a valid FMA (MUL then ADD). However (a+b)* c cannot be translated into an FMA (ADD then MUL).

CALL instructions

Detected function call instructions.

Details

__assert_fail@plt: 1 occurrences►
- /beegfs/hackathon/users/eoseret/qaas_runs_test/gmz12.benchmarkcenter.megware.com/177-374-1600/CoMD/build/CoMD/CoMD/src-openmp/ljForce.c:182
__kmpc_atomic_float8_add@plt: 1 occurrences►
- /beegfs/hackathon/users/eoseret/qaas_runs_test/gmz12.benchmarkcenter.megware.com/177-374-1600/CoMD/build/CoMD/CoMD/src-openmp/ljForce.c:172
__kmpc_end_reduce@plt: 1 occurrences►
- /beegfs/hackathon/users/eoseret/qaas_runs_test/gmz12.benchmarkcenter.megware.com/177-374-1600/CoMD/build/CoMD/CoMD/src-openmp/ljForce.c:172
__kmpc_for_static_fini@plt: 1 occurrences►
- /beegfs/hackathon/users/eoseret/qaas_runs_test/gmz12.benchmarkcenter.megware.com/177-374-1600/CoMD/build/CoMD/CoMD/src-openmp/ljForce.c:172
__kmpc_for_static_init_4@plt: 1 occurrences►
- /beegfs/hackathon/users/eoseret/qaas_runs_test/gmz12.benchmarkcenter.megware.com/177-374-1600/CoMD/build/CoMD/CoMD/src-openmp/ljForce.c:172
__kmpc_reduce@plt: 1 occurrences►
- /beegfs/hackathon/users/eoseret/qaas_runs_test/gmz12.benchmarkcenter.megware.com/177-374-1600/CoMD/build/CoMD/CoMD/src-openmp/ljForce.c:172

Type of elements and instruction set

2 SSE or AVX instructions are processing arithmetic or math operations on double precision FP elements in scalar mode (one at a time).

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

The binary function is composed of 2 FP arithmetical operations:

1: addition or subtraction
1: multiply

The binary function is loading 172 bytes (21 double precision FP elements). The binary function is storing 84 bytes (10 double precision FP elements).

Arithmetic intensity

Arithmetic intensity is 0.01 FP operations per loaded or stored byte.

General properties

nb instructions	115
nb uops	115
loop length	478
used x86 registers	14
used mmx registers	0
used xmm registers	11
used ymm registers	0
used zmm registers	0
nb stack references	14
ADD-SUB / MUL ratio	1.00

Front-end

MACRO FUSION NOT POSSIBLE FIT IN UOP CACHE

micro-operation queue	14.38 cycles
front end	14.38 cycles

Back-end

	P0	P1	P2	P3	P4	P5	P6	P7	P8	P9	P10	P11	P12	P13	P14	P15
uops	8.00	8.00	8.00	8.00	8.00	8.00	11.00	11.00	11.00	11.00	0.50	0.50	0.50	0.50	1.00	1.00
cycles	8.00	8.00	8.00	8.00	8.00	8.00	11.00	11.00	11.00	11.00	0.50	0.50	0.50	0.50	1.00	1.00

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	14.38
Dispatch	11.00
Overall L1	14.38

Vectorization ratios

INT

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

all	14%
load	0%
store	0%
mul	0%
add-sub	0%
fma	NA (no fma vectorizable/vectorized instructions)
div/sqrt	NA (no div/sqrt vectorizable/vectorized instructions)
other	100%

INT+FP

all	3%
load	0%
store	0%
mul	0%
add-sub	0%
fma	NA (no fma vectorizable/vectorized instructions)
div/sqrt	NA (no div/sqrt vectorizable/vectorized instructions)
other	9%

Vector efficiency ratios

INT

all	8%
load	7%
store	9%
mul	NA (no mul vectorizable/vectorized instructions)
add-sub	NA (no add-sub vectorizable/vectorized instructions)
fma	NA (no fma vectorizable/vectorized instructions)
other	8%

all	14%
load	12%
store	12%
mul	12%
add-sub	12%
fma	NA (no fma vectorizable/vectorized instructions)
div/sqrt	NA (no div/sqrt vectorizable/vectorized instructions)
other	25%

INT+FP

all	10%
load	10%
store	10%
mul	12%
add-sub	12%
fma	NA (no fma vectorizable/vectorized instructions)
div/sqrt	NA (no div/sqrt vectorizable/vectorized instructions)
other	10%

Cycles and memory resources usage

Assuming all data fit into the L1 cache, each call to the function takes 14.38 cycles. At this rate:

4% of peak load performance is reached (11.97 out of 256.00 bytes loaded per cycle (GB/s @ 1GHz))
4% of peak store performance is reached (5.84 out of 128.00 bytes stored per cycle (GB/s @ 1GHz))

Front-end bottlenecks

ASM code

In the binary file, the address of the function is: 40b600

Instruction	Nb FU	P0	P1	P2	P3	P4	P5	P6	P7	P8	P9	P10	P11	P12	P13	P14	P15	Latency	Recip. throughput	Vectorization
PUSH %RBP	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.50	N/A
MOV %RSP,%RBP	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	N/A
PUSH %R15	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.50	N/A
PUSH %R14	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.50	N/A
PUSH %R13	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.50	N/A
PUSH %R12	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.50	N/A
PUSH %RBX	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.50	N/A
SUB $0x58,%RSP	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	0	1	0.17	N/A
MOVL $0,-0x44(%RBP)	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	4	0.50	scal (6.3%)
MOV 0x28(%RBP),%EAX	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	3	0.25	N/A
MOV %R9,%R14	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	scal (12.5%)
MOV %R8,%R13	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	scal (12.5%)
MOV %RCX,%R12	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	scal (12.5%)
MOV %RDX,-0x58(%RBP)	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	4	0.50	scal (12.5%)
MOV %RDI,-0x68(%RBP)	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	4	0.50	scal (12.5%)
MOV (%RDI),%ESI	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	3	0.25	scal (6.3%)
MOVL $0,-0x30(%RBP)	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	4	0.50	scal (6.3%)
MOVL $0x1,-0x40(%RBP)	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	4	0.50	scal (6.3%)
MOV %EAX,-0x2c(%RBP)	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	4	0.50	scal (6.3%)
SUB $0x8,%RSP	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	0	1	0.17	N/A
LEA -0x44(%RBP),%RCX	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	0	1	0.17	N/A
LEA -0x40(%RBP),%RAX	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	0	1	0.17	N/A
LEA -0x30(%RBP),%R8	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	0	1	0.17	N/A
LEA -0x2c(%RBP),%R9	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	0	1	0.17	N/A
MOV $0x42c750,%EDI	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	0	1	0.17	N/A
MOV %ESI,-0x3c(%RBP)	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	4	0.50	scal (6.3%)
MOV $0x22,%EDX	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	0	1	0.17	scal (6.3%)
PUSH $0x1	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.50	N/A
PUSH $0x1	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.50	N/A
PUSH %RAX	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.50	N/A
CALL 403250 <__kmpc_for_static_init_4@plt>	2	0	0	0	0.33	0.33	0.33	0.25	0.25	0.25	0.25	0	0	0	0	0	0	0	0.50	N/A
ADD $0x20,%RSP	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	0	1	0.17	N/A
MOV -0x2c(%RBP),%EAX	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	3	0.25	N/A
MOV -0x30(%RBP),%ECX	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	3	0.25	scal (6.3%)
VXORPD %XMM5,%XMM5,%XMM5	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	vect (25.0%)
MOV %RAX,-0x50(%RBP)	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	4	0.50	scal (12.5%)
CMP %EAX,%ECX	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	0	1	0.17	scal (6.3%)
JBE 40b6fe <ljForce.extracted+0xfe>	1	0	0	0	0.33	0.33	0.33	0	0	0	0	0	0	0	0	0	0	0	0.33-1	N/A
MOV -0x3c(%RBP),%ESI	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	3	0.25	scal (6.3%)
MOV 0x30(%RBP),%R15	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	3	0.25	N/A
MOV $0x42c770,%EDI	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	0	1	0.17	N/A
VMOVSD %XMM5,-0x38(%RBP)	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0.50	0.50	1	0.50	scal (12.5%)
CALL 403320 <__kmpc_for_static_fini@plt>	2	0	0	0	0.33	0.33	0.33	0.25	0.25	0.25	0.25	0	0	0	0	0	0	0	0.50	N/A
MOV -0x68(%RBP),%RBX	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	3	0.25	N/A
MOV (%RBX),%ESI	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	3	0.25	scal (6.3%)
SUB $0x8,%RSP	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	0	1	0.17	N/A
MOV $0x4306e0,%RAX	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	0	1	0.17	N/A
LEA -0x38(%RBP),%R8	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	0	1	0.17	N/A
MOV $0x42c7b0,%EDI	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	0	1	0.17	N/A
MOV $0x40b5f0,%R9D	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	0	1	0.17	scal (6.3%)
MOV $0x1,%EDX	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	0	1	0.17	scal (6.3%)
MOV $0x8,%ECX	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	0	1	0.17	scal (6.3%)
PUSH %RAX	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.50	N/A
CALL 403030 <__kmpc_reduce@plt>	2	0	0	0	0.33	0.33	0.33	0.25	0.25	0.25	0.25	0	0	0	0	0	0	0	0.50	N/A
ADD $0x10,%RSP	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	0	1	0.17	N/A
CMP $0x2,%EAX	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	0	1	0.17	scal (6.3%)
JE 40b9ed <ljForce.extracted+0x3ed>	1	0	0	0	0.33	0.33	0.33	0	0	0	0	0	0	0	0	0	0	0	0.33-1	N/A
CMP $0x1,%EAX	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	0	1	0.17	scal (6.3%)
JNE 40ba14 <ljForce.extracted+0x414>	1	0	0	0	0.33	0.33	0.33	0	0	0	0	0	0	0	0	0	0	0	0.33-1	N/A
VMOVSD -0x38(%RBP),%XMM0	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	1	0.50	scal (12.5%)
MOV $0x4306e0,%RDX	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	0	1	0.17	scal (6.3%)
MOV $0x42c7d0,%EDI	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	0	1	0.17	N/A
VADDSD (%R15),%XMM0,%XMM0	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0.50	0.50	0	0	2	0.50	scal (12.5%)
VMOVSD %XMM0,(%R15)	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0.50	0.50	1	0.50	scal (12.5%)
MOV (%RBX),%ESI	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	3	0.25	scal (6.3%)
JMP 40ba0f <ljForce.extracted+0x40f>	1	0	0	0	0.33	0.33	0.33	0	0	0	0	0	0	0	0	0	0	0	0.50	N/A
MOV -0x58(%RBP),%RAX	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	3	0.25	N/A
VMOVQ %R12,%XMM3	1	0	0	1	0	0	0	0	0	0	0	0	0	0	0	0	0	2	1	scal (12.5%)
VMULSD 0x16141(%RIP),%XMM3,%XMM3	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0.50	0.50	0	0	0	0	3	0.50	scal (12.5%)
VMOVSD 0x10(%RBP),%XMM0	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	1	0.50	scal (12.5%)
VMOVSD 0x13b24(%RIP),%XMM6	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	1	0.50	scal (12.5%)
VMOVSD 0x14ff4(%RIP),%XMM7	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	1	0.50	scal (12.5%)
VMOVSD 0x1612c(%RIP),%XMM8	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	1	0.50	scal (12.5%)
VMOVSD 0x1612c(%RIP),%XMM9	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	1	0.50	scal (12.5%)
VMOVSD 0x1612c(%RIP),%XMM10	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	1	0.50	scal (12.5%)
INCQ -0x50(%RBP)	1	0.17	0.17	0.17	0.17	0.17	0.17	0.25	0.25	0.25	0.25	0	0	0	0	0	0	1	0.50	scal (12.5%)
MOV %ECX,%EDI	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	N/A
VMOVQ %R14,%XMM1	1	0	0	1	0	0	0	0	0	0	0	0	0	0	0	0	0	2	1	scal (12.5%)
VMOVQ %R13,%XMM2	1	0	0	1	0	0	0	0	0	0	0	0	0	0	0	0	0	2	1	scal (12.5%)
SAL $0x6,%EDI	1	0	0	0	0.33	0.33	0.33	0	0	0	0	0	0	0	0	0	0	1	0.33	N/A
VXORPD %XMM4,%XMM4,%XMM4	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	vect (25.0%)
MOV 0x18(%RAX),%RAX	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	3	0.25	N/A
MOV 0x78(%RAX),%RDX	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	3	0.25	scal (12.5%)
MOV 0x80(%RAX),%RAX	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	3	0.25	N/A
MOV %RDX,-0x60(%RBP)	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	4	0.50	scal (12.5%)
MOV %RAX,-0x70(%RBP)	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	4	0.50	scal (12.5%)
JMP 40b784 <ljForce.extracted+0x184>	1	0	0	0	0.33	0.33	0.33	0	0	0	0	0	0	0	0	0	0	0	0.50	N/A
NOPL (%RAX)	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0.13	N/A
NOPL (%RAX)	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0.13	N/A
NOPL (%RAX,%RAX,1)	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0.13	N/A
NOPL (%RAX)	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0.13	N/A
NOPW (%RAX,%RAX,1)	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0.13	N/A
MOV $0x421873,%EDI	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	0	1	0.17	N/A
MOV $0x42187b,%ESI	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	0	1	0.17	scal (6.3%)
MOV $0x421903,%ECX	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	0	1	0.17	scal (6.3%)
MOV $0xb6,%EDX	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	0	1	0.17	scal (6.3%)
CALL 403070 <__assert_fail@plt>	2	0	0	0	0.33	0.33	0.33	0.25	0.25	0.25	0.25	0	0	0	0	0	0	0	0.50	N/A
VMOVSD -0x38(%RBP),%XMM0	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	1	0.50	scal (12.5%)
MOV (%RBX),%ESI	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	3	0.25	scal (6.3%)
MOV $0x42c790,%EDI	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	0	1	0.17	N/A
MOV %R15,%RDX	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	scal (12.5%)
CALL 4031b0 <__kmpc_atomic_float8_add@plt>	2	0	0	0	0.33	0.33	0.33	0.25	0.25	0.25	0.25	0	0	0	0	0	0	0	0.50	N/A
MOV (%RBX),%ESI	1	0	0	0	0	0	0	0.25	0.25	0.25	0.25	0	0	0	0	0	0	3	0.25	scal (6.3%)
MOV $0x4306e0,%RDX	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	0	1	0.17	scal (6.3%)
MOV $0x42c7f0,%EDI	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	0	1	0.17	N/A
CALL 403280 <__kmpc_end_reduce@plt>	2	0	0	0	0.33	0.33	0.33	0.25	0.25	0.25	0.25	0	0	0	0	0	0	0	0.50	N/A
ADD $0x58,%RSP	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	0	1	0.17	N/A
POP %RBX	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.25	N/A
POP %R12	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.25	N/A
POP %R13	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.25	N/A
POP %R14	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.25	N/A
POP %R15	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.25	N/A
POP %RBP	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.25	N/A
RET	1	0	0	0	0.33	0.33	0.33	0	0	0	0	0	0	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	0	0	0	0	0	0.13	N/A

Name	Coverage (%)	Time (s)
▼ljForce.extracted–	36.57	2.70
▼Loop 94 - ljForce.c:173-222 - exec–	0.00	0.01
▼Loop 95 - ljForce.c:178-216 - exec–	0.12	0.01
▼Loop 96 - ljForce.c:187-216 - exec–	0.41	0.03
○Loop 97 - ljForce.c:191-216 - exec	36.01	2.62

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FMA

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CALL instructions

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Type of elements and instruction set

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

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General properties

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Cycles summary

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Vector efficiency ratios

Cycles and memory resources usage

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ASM code