OV - exec - Function main._omp

	Function: main._omp_fn.3	Module: exec	Source: stream.c:290-292	Coverage (incl. loops): 0.64% \| (excl. loops): 0.00%

/beegfs/hackathon/users/eoseret/qaas_runs_test/isix05.benchmarkcenter.megware.com/177-373-7249/stream-triad/build/stream-triad/src/stream.c: 290 - 292

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

290: #pragma omp parallel for

291:     for (j = 0; j < STREAM_ARRAY_SIZE; j++)

292: 		a[j] = 2.0E0 * a[j];

0x401f50 PUSH	%RBP

0x401f51 MOV	$0x401060,%RAX

0x401f5b MOV	%RSP,%RBP

0x401f5e PUSH	%RBX

0x401f5f AND	$-0x20,%RSP

0x401f63 CALL	%RAX

0x401f65 MOVSXD	%EAX,%RBX

0x401f68 MOV	$0x401030,%RAX

0x401f72 CALL	%RAX

0x401f74 MOVSXD	%EAX,%RCX

0x401f77 MOV	$0x33450000,%EAX

0x401f7c CQTO

0x401f7e IDIV	%RBX

0x401f81 CMP	%RDX,%RCX

0x401f84 JL	402198

0x401f8a IMUL	%RAX,%RCX

0x401f8e ADD	%RCX,%RDX

0x401f91 LEA	(%RAX,%RDX,1),%RSI

0x401f95 CMP	%RSI,%RDX

0x401f98 JGE	40218d

0x401f9e LEA	-0x1(%RAX),%RDI

0x401fa2 MOV	%RDX,%R9

0x401fa5 CMP	$0x2,%RDI

0x401fa9 JBE	4021a8

0x401faf MOV	%RAX,%RBX

0x401fb2 MOV	$0x3349060e0,%R10

0x401fbc SHR	$0x2,%RBX

0x401fc0 SAL	$0x5,%RBX

0x401fc4 LEA	(%R10,%RDX,8),%R11

0x401fc8 LEA	(%RBX,%R11,1),%R8

0x401fcc SUB	$0x20,%RBX

0x401fd0 SHR	$0x5,%RBX

0x401fd4 INC	%RBX

0x401fd7 AND	$0x7,%EBX

0x401fda JE	402099

0x401fe0 CMP	$0x1,%RBX

0x401fe4 JE	40207c

0x401fea CMP	$0x2,%RBX

0x401fee JE	402068

0x401ff0 CMP	$0x3,%RBX

0x401ff4 JE	402054

0x401ff6 CMP	$0x4,%RBX

0x401ffa JE	402041

0x401ffc CMP	$0x5,%RBX

0x402000 JE	40202e

0x402002 CMP	$0x6,%RBX

0x402006 JE	40201b

0x402008 VMOVUPD	(%R11),%YMM0

0x40200d ADD	$0x20,%R11

0x402011 VADDPD	%YMM0,%YMM0,%YMM1

0x402015 VMOVUPD	%YMM1,-0x20(%R11)

0x40201b VMOVUPD	(%R11),%YMM2

0x402020 ADD	$0x20,%R11

0x402024 VADDPD	%YMM2,%YMM2,%YMM3

0x402028 VMOVUPD	%YMM3,-0x20(%R11)

0x40202e VMOVUPD	(%R11),%YMM4

0x402033 ADD	$0x20,%R11

0x402037 VADDPD	%YMM4,%YMM4,%YMM5

0x40203b VMOVUPD	%YMM5,-0x20(%R11)

0x402041 VMOVUPD	(%R11),%YMM6

0x402046 ADD	$0x20,%R11

0x40204a VADDPD	%YMM6,%YMM6,%YMM7

0x40204e VMOVUPD	%YMM7,-0x20(%R11)

0x402054 VMOVUPD	(%R11),%YMM8

0x402059 ADD	$0x20,%R11

0x40205d VADDPD	%YMM8,%YMM8,%YMM9

0x402062 VMOVUPD	%YMM9,-0x20(%R11)

0x402068 VMOVUPD	(%R11),%YMM10

0x40206d ADD	$0x20,%R11

0x402071 VADDPD	%YMM10,%YMM10,%YMM11

0x402076 VMOVUPD	%YMM11,-0x20(%R11)

0x40207c VMOVUPD	(%R11),%YMM12

0x402081 ADD	$0x20,%R11

0x402085 VADDPD	%YMM12,%YMM12,%YMM13

0x40208a VMOVUPD	%YMM13,-0x20(%R11)

0x402090 CMP	%R8,%R11

0x402093 JE	402143

(4) 0x402099 VMOVUPD	(%R11),%YMM14

(4) 0x40209e VMOVUPD	0x20(%R11),%YMM0

(4) 0x4020a4 VMOVUPD	0x40(%R11),%YMM2

(4) 0x4020aa VMOVUPD	0x60(%R11),%YMM4

(4) 0x4020b0 VMOVUPD	0x80(%R11),%YMM6

(4) 0x4020b9 VMOVUPD	0xa0(%R11),%YMM8

(4) 0x4020c2 VMOVUPD	0xc0(%R11),%YMM10

(4) 0x4020cb VMOVUPD	0xe0(%R11),%YMM12

(4) 0x4020d4 VADDPD	%YMM14,%YMM14,%YMM15

(4) 0x4020d9 VADDPD	%YMM0,%YMM0,%YMM1

(4) 0x4020dd VADDPD	%YMM2,%YMM2,%YMM3

(4) 0x4020e1 VADDPD	%YMM4,%YMM4,%YMM5

(4) 0x4020e5 VADDPD	%YMM6,%YMM6,%YMM7

(4) 0x4020e9 VADDPD	%YMM8,%YMM8,%YMM9

(4) 0x4020ee VADDPD	%YMM10,%YMM10,%YMM11

(4) 0x4020f3 VADDPD	%YMM12,%YMM12,%YMM13

(4) 0x4020f8 VMOVUPD	%YMM15,(%R11)

(4) 0x4020fd VMOVUPD	%YMM1,0x20(%R11)

(4) 0x402103 VMOVUPD	%YMM3,0x40(%R11)

(4) 0x402109 VMOVUPD	%YMM5,0x60(%R11)

(4) 0x40210f VMOVUPD	%YMM7,0x80(%R11)

(4) 0x402118 VMOVUPD	%YMM9,0xa0(%R11)

(4) 0x402121 VMOVUPD	%YMM11,0xc0(%R11)

(4) 0x40212a VMOVUPD	%YMM13,0xe0(%R11)

(4) 0x402133 ADD	$0x100,%R11

(4) 0x40213a CMP	%R8,%R11

(4) 0x40213d JNE	402099

0x402143 MOV	%RAX,%RCX

0x402146 AND	$-0x4,%RCX

0x40214a ADD	%RCX,%RDX

0x40214d CMP	%RCX,%RAX

0x402150 JE	4021c0

0x402152 VZEROUPPER

0x402155 SUB	%RCX,%RAX

0x402158 CMP	$0x1,%RAX

0x40215c JE	40217d

0x40215e ADD	%R9,%RCX

0x402161 LEA	(%R10,%RCX,8),%RSI

0x402165 VMOVUPD	(%RSI),%XMM14

0x402169 VADDPD	%XMM14,%XMM14,%XMM15

0x40216e VMOVUPD	%XMM15,(%RSI)

0x402172 TEST	$0x1,%AL

0x402174 JE	40218d

0x402176 AND	$-0x2,%RAX

0x40217a ADD	%RAX,%RDX

0x40217d VMOVSD	(%R10,%RDX,8),%XMM0

0x402183 VADDSD	%XMM0,%XMM0,%XMM1

0x402187 VMOVSD	%XMM1,(%R10,%RDX,8)

0x40218d MOV	-0x8(%RBP),%RBX

0x402191 LEAVE

0x402192 RET

0x402193 NOPL	(%RAX,%RAX,1)

0x402198 INC	%RAX

0x40219b XOR	%EDX,%EDX

0x40219d JMP	401f8a

0x4021a2 NOPW	(%RAX,%RAX,1)

0x4021a8 XOR	%ECX,%ECX

0x4021aa MOV	$0x3349060e0,%R10

0x4021b4 JMP	402155

0x4021b6 NOPW	%CS:(%RAX,%RAX,1)

0x4021c0 VZEROUPPER

0x4021c3 MOV	-0x8(%RBP),%RBX

0x4021c7 LEAVE

0x4021c8 RET

0x4021c9 NOPL	(%RAX)

Coverage (%)	Name	Source Location	Module
○99.16	gomp_thread_start	team.c:130	libgomp.so.1.0.0

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	stream.c:290-292
Module	exec

The function is defined in /beegfs/hackathon/users/eoseret/qaas_runs_test/isix05.benchmarkcenter.megware.com/177-373-7249/stream-triad/build/stream-triad/src/stream.c:290-292.

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 21.17 to 8.67 cycles (2.44x speedup).

Workaround

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

Vectorization

Your function is partially vectorized. Only 31% of vector register length is used (average across all SSE/AVX instructions).

Details

57% of SSE/AVX instructions are used in vector version (process two or more data elements in vector registers):

88% of SSE/AVX loads are used in vector version.
88% of SSE/AVX stores are used in vector version.
88% of SSE/AVX addition or subtraction instructions are used in vector version.
0% of SSE/AVX divide and square root instructions are used in vector version.
11% of SSE/AVX instructions that are not load, store, addition, subtraction nor multiply instructions are used in vector version.

Workaround

Read the "512-bits vectorization" report at "Potential" confidence level.

Execution units bottlenecks

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

512-bits vectorization

On some x86 processors supporting 512-bits vectorization, compilers are often too conservative and limit vectorization to 256 bits. Performance can then be improved by enforcing 512-bits vectorization, especially with many vectorized and high trip count loops. 512-bits vectorization performance overhead (compared to 256-bits) is generally lower on newer processors.

Workaround

Recompile with -mprefer-vector-width=512

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►
- /beegfs/hackathon/users/eoseret/qaas_runs_test/isix05.benchmarkcenter.megware.com/177-373-7249/stream-triad/build/stream-triad/src/stream.c:290
- /beegfs/hackathon/users/eoseret/qaas_runs_test/isix05.benchmarkcenter.megware.com/177-373-7249/stream-triad/build/stream-triad/src/stream.c:290

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.

IDIV: 1 occurrences►
- /beegfs/hackathon/users/eoseret/qaas_runs_test/isix05.benchmarkcenter.megware.com/177-373-7249/stream-triad/build/stream-triad/src/stream.c:290
LEAVE: 2 occurrences►
- /beegfs/hackathon/users/eoseret/qaas_runs_test/isix05.benchmarkcenter.megware.com/177-373-7249/stream-triad/build/stream-triad/src/stream.c:290
- /beegfs/hackathon/users/eoseret/qaas_runs_test/isix05.benchmarkcenter.megware.com/177-373-7249/stream-triad/build/stream-triad/src/stream.c:290
VZEROUPPER: 2 occurrences►
- /beegfs/hackathon/users/eoseret/qaas_runs_test/isix05.benchmarkcenter.megware.com/177-373-7249/stream-triad/build/stream-triad/src/stream.c:292
- /beegfs/hackathon/users/eoseret/qaas_runs_test/isix05.benchmarkcenter.megware.com/177-373-7249/stream-triad/build/stream-triad/src/stream.c:290

Vector unaligned load/store instructions

Detected 14 optimal vector unaligned load/store instructions.

Details

VMOVUPD: 14 occurrences►
- /beegfs/hackathon/users/eoseret/qaas_runs_test/isix05.benchmarkcenter.megware.com/177-373-7249/stream-triad/build/stream-triad/src/stream.c:292
- /beegfs/hackathon/users/eoseret/qaas_runs_test/isix05.benchmarkcenter.megware.com/177-373-7249/stream-triad/build/stream-triad/src/stream.c:292
- /beegfs/hackathon/users/eoseret/qaas_runs_test/isix05.benchmarkcenter.megware.com/177-373-7249/stream-triad/build/stream-triad/src/stream.c:292
- /beegfs/hackathon/users/eoseret/qaas_runs_test/isix05.benchmarkcenter.megware.com/177-373-7249/stream-triad/build/stream-triad/src/stream.c:292
- /beegfs/hackathon/users/eoseret/qaas_runs_test/isix05.benchmarkcenter.megware.com/177-373-7249/stream-triad/build/stream-triad/src/stream.c:292
- /beegfs/hackathon/users/eoseret/qaas_runs_test/isix05.benchmarkcenter.megware.com/177-373-7249/stream-triad/build/stream-triad/src/stream.c:292
- /beegfs/hackathon/users/eoseret/qaas_runs_test/isix05.benchmarkcenter.megware.com/177-373-7249/stream-triad/build/stream-triad/src/stream.c:292
- /beegfs/hackathon/users/eoseret/qaas_runs_test/isix05.benchmarkcenter.megware.com/177-373-7249/stream-triad/build/stream-triad/src/stream.c:292
- /beegfs/hackathon/users/eoseret/qaas_runs_test/isix05.benchmarkcenter.megware.com/177-373-7249/stream-triad/build/stream-triad/src/stream.c:292
- /beegfs/hackathon/users/eoseret/qaas_runs_test/isix05.benchmarkcenter.megware.com/177-373-7249/stream-triad/build/stream-triad/src/stream.c:292
- /beegfs/hackathon/users/eoseret/qaas_runs_test/isix05.benchmarkcenter.megware.com/177-373-7249/stream-triad/build/stream-triad/src/stream.c:292
- /beegfs/hackathon/users/eoseret/qaas_runs_test/isix05.benchmarkcenter.megware.com/177-373-7249/stream-triad/build/stream-triad/src/stream.c:292
- /beegfs/hackathon/users/eoseret/qaas_runs_test/isix05.benchmarkcenter.megware.com/177-373-7249/stream-triad/build/stream-triad/src/stream.c:292
- /beegfs/hackathon/users/eoseret/qaas_runs_test/isix05.benchmarkcenter.megware.com/177-373-7249/stream-triad/build/stream-triad/src/stream.c:292

Workaround

Use vector aligned instructions:

align your arrays on 64 bytes boundaries: replace { void *p = malloc (size); } with { void *p; posix_memalign (&p, 64, size); }.
inform your compiler that your arrays are vector aligned: if array 'foo' is 64 bytes-aligned, define a pointer 'p_foo' as __builtin_assume_aligned (foo, 64) and use it instead of 'foo' in the loop.

Conversion instructions

Detected expensive conversion instructions.

Details

CQTO: 1 occurrences►
- /beegfs/hackathon/users/eoseret/qaas_runs_test/isix05.benchmarkcenter.megware.com/177-373-7249/stream-triad/build/stream-triad/src/stream.c:290

Workaround

Avoid mixing data with different types. In particular, check if the type of constants is the same as array elements.

Type of elements and instruction set

1 SSE or AVX instructions are processing arithmetic or math operations on double precision FP elements in scalar mode (one at a time). 1 SSE or AVX instructions are processing arithmetic or math operations on double precision FP elements in vector mode (two at a time). 7 AVX instructions are processing arithmetic or math operations on double precision FP elements in vector mode (four at a time).

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

The binary function is composed of 31 FP arithmetical operations:

31: addition or subtraction

The binary function is loading 264 bytes (33 double precision FP elements). The binary function is storing 248 bytes (31 double precision FP elements).

Arithmetic intensity

Arithmetic intensity is 0.06 FP operations per loaded or stored byte.

General properties

nb instructions	115
nb uops	127
loop length	470
used x86 registers	12
used mmx registers	0
used xmm registers	4
used ymm registers	14
used zmm registers	0
nb stack references	1

Front-end

MACRO FUSION NOT POSSIBLE FIT IN UOP CACHE

micro-operation queue	21.17 cycles
front end	21.17 cycles

Back-end

	P0	P1	P2	P3	P4	P5	P6	P7	P8	P9	P10	P11
uops	14.00	14.10	5.00	5.00	6.50	13.90	14.00	6.50	6.50	6.50	14.00	5.00
cycles	14.00	14.10	5.00	5.00	6.50	13.90	14.00	6.50	6.50	6.50	14.00	5.00

Execution ports to units layout:

P0 (256 bits): VPU, BRU, ALU, DIV/SQRT
P1 (256 bits): ALU, VPU
P2 (512 bits): load
P3 (512 bits): load
P4 (512 bits): store data
P5 (512 bits): ALU, VPU
P6: ALU, BRU
P7: store address
P8: store address
P9 (512 bits): store data
P10: ALU
P11 (512 bits): load

Cycles executing div or sqrt instructions

10.00

Cycles summary

Front-end	21.17
Dispatch	14.10
DIV/SQRT	10.00
Overall L1	21.17

Vectorization ratios

INT

all	11%
load	NA (no load vectorizable/vectorized instructions)
store	NA (no store vectorizable/vectorized instructions)
mul	NA (no mul vectorizable/vectorized instructions)
add-sub	NA (no add-sub vectorizable/vectorized instructions)
fma	NA (no fma vectorizable/vectorized instructions)
other	11%

all	88%
load	88%
store	88%
mul	NA (no mul vectorizable/vectorized instructions)
add-sub	88%
fma	NA (no fma vectorizable/vectorized instructions)
div/sqrt	NA (no div/sqrt vectorizable/vectorized instructions)
other	NA (no other vectorizable/vectorized instructions)

INT+FP

all	57%
load	88%
store	88%
mul	NA (no mul vectorizable/vectorized instructions)
add-sub	88%
fma	NA (no fma vectorizable/vectorized instructions)
div/sqrt	0%
other	11%

Vector efficiency ratios

INT

all	13%
load	NA (no load vectorizable/vectorized instructions)
store	NA (no store vectorizable/vectorized instructions)
mul	NA (no mul vectorizable/vectorized instructions)
add-sub	NA (no add-sub vectorizable/vectorized instructions)
fma	NA (no fma vectorizable/vectorized instructions)
other	13%

all	43%
load	43%
store	43%
mul	NA (no mul vectorizable/vectorized instructions)
add-sub	43%
fma	NA (no fma vectorizable/vectorized instructions)
div/sqrt	NA (no div/sqrt vectorizable/vectorized instructions)
other	NA (no other vectorizable/vectorized instructions)

INT+FP

all	31%
load	43%
store	43%
mul	NA (no mul vectorizable/vectorized instructions)
add-sub	43%
fma	NA (no fma vectorizable/vectorized instructions)
div/sqrt	12%
other	13%

Cycles and memory resources usage

Assuming all data fit into the L1 cache, each call to the function takes 21.17 cycles. At this rate:

6% of peak load performance is reached (12.47 out of 192.00 bytes loaded per cycle (GB/s @ 1GHz))
9% of peak store performance is reached (11.72 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 21.17 to 14.10 cycles (1.50x speedup).

ASM code

In the binary file, the address of the function is: 401f50

Instruction	Nb FU	P0	P1	P2	P3	P4	P5	P6	P7	P8	P9	P10	P11	Latency	Recip. throughput	Vectorization
PUSH %RBP	1	0	0	0	0	0.50	0	0	0.50	0.50	0.50	0	0	5-12	0.50	N/A
MOV $0x401060,%RAX	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1	0.28	N/A
MOV %RSP,%RBP	1	0	0	0	0	0	0	0	0	0	0	0	0	1	0.17	N/A
PUSH %RBX	1	0	0	0	0	0.50	0	0	0.50	0.50	0.50	0	0	5-12	0.50	N/A
AND $-0x20,%RSP	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1-2	0.20	scal (12.5%)
CALL %RAX	2	0.50	0	0	0	0.50	0	0.50	0.50	0.50	0.50	0	0	0	2.14	N/A
MOVSXD %EAX,%RBX	1	0	0.33	0	0	0	0.33	0	0	0	0	0.33	0	1	0.33	N/A
MOV $0x401030,%RAX	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1	0.28	N/A
CALL %RAX	2	0.50	0	0	0	0.50	0	0.50	0.50	0.50	0.50	0	0	0	2.14	N/A
MOVSXD %EAX,%RCX	1	0	0.33	0	0	0	0.33	0	0	0	0	0.33	0	1	0.33	N/A
MOV $0x33450000,%EAX	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1	0.20	N/A
CQTO	1	0.50	0	0	0	0	0	0.50	0	0	0	0	0	1	0.50	scal (12.5%)
IDIV %RBX	5	0	3	0	0	0	0	0	0	0	0	0	0	11-16	10	scal (12.5%)
CMP %RDX,%RCX	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1	0.20	scal (12.5%)
JL 402198 <main._omp_fn.3+0x248>	1	0.50	0	0	0	0	0	0.50	0	0	0	0	0	0	0.50	N/A
IMUL %RAX,%RCX	1	0	1	0	0	0	0	0	0	0	0	0	0	3	1	N/A
ADD %RCX,%RDX	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1	0.20	N/A
LEA (%RAX,%RDX,1),%RSI	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	N/A
CMP %RSI,%RDX	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1	0.20	scal (12.5%)
JGE 40218d <main._omp_fn.3+0x23d>	1	0.50	0	0	0	0	0	0.50	0	0	0	0	0	0	0.50	N/A
LEA -0x1(%RAX),%RDI	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	N/A
MOV %RDX,%R9	1	0	0	0	0	0	0	0	0	0	0	0	0	1	0.17	scal (12.5%)
CMP $0x2,%RDI	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1	0.20	scal (12.5%)
JBE 4021a8 <main._omp_fn.3+0x258>	1	0.50	0	0	0	0	0	0.50	0	0	0	0	0	0	0.50	N/A
MOV %RAX,%RBX	1	0	0	0	0	0	0	0	0	0	0	0	0	1	0.17	N/A
MOV $0x3349060e0,%R10	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1	0.28	N/A
SHR $0x2,%RBX	1	0.50	0	0	0	0	0	0.50	0	0	0	0	0	0-2	0.50	N/A
SAL $0x5,%RBX	1	0.50	0	0	0	0	0	0.50	0	0	0	0	0	0-2	0.50	N/A
LEA (%R10,%RDX,8),%R11	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	N/A
LEA (%RBX,%R11,1),%R8	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	N/A
SUB $0x20,%RBX	1	0	0	0	0	0	0	0	0	0	0	0	0	1	0.17	N/A
SHR $0x5,%RBX	1	0.50	0	0	0	0	0	0.50	0	0	0	0	0	0-2	0.50	N/A
INC %RBX	1	0	0	0	0	0	0	0	0	0	0	0	0	1	0.17	N/A
AND $0x7,%EBX	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1-2	0.20	N/A
JE 402099 <main._omp_fn.3+0x149>	1	0.50	0	0	0	0	0	0.50	0	0	0	0	0	0	0.50	N/A
CMP $0x1,%RBX	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1	0.20	scal (12.5%)
JE 40207c <main._omp_fn.3+0x12c>	1	0.50	0	0	0	0	0	0.50	0	0	0	0	0	0	0.50	N/A
CMP $0x2,%RBX	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1	0.20	scal (12.5%)
JE 402068 <main._omp_fn.3+0x118>	1	0.50	0	0	0	0	0	0.50	0	0	0	0	0	0	0.50	N/A
CMP $0x3,%RBX	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1	0.20	scal (12.5%)
JE 402054 <main._omp_fn.3+0x104>	1	0.50	0	0	0	0	0	0.50	0	0	0	0	0	0	0.50	N/A
CMP $0x4,%RBX	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1	0.20	scal (12.5%)
JE 402041 <main._omp_fn.3+0xf1>	1	0.50	0	0	0	0	0	0.50	0	0	0	0	0	0	0.50	N/A
CMP $0x5,%RBX	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1	0.20	scal (12.5%)
JE 40202e <main._omp_fn.3+0xde>	1	0.50	0	0	0	0	0	0.50	0	0	0	0	0	0	0.50	N/A
CMP $0x6,%RBX	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1	0.20	scal (12.5%)
JE 40201b <main._omp_fn.3+0xcb>	1	0.50	0	0	0	0	0	0.50	0	0	0	0	0	0	0.50	N/A
VMOVUPD (%R11),%YMM0	1	0	0	0.33	0.33	0	0	0	0	0	0	0	0.33	0-1	0.33	vect (50.0%)
ADD $0x20,%R11	1	0	0	0	0	0	0	0	0	0	0	0	0	1	0.17	N/A
VADDPD %YMM0,%YMM0,%YMM1	1	0	0.50	0	0	0	0.50	0	0	0	0	0	0	3	0.50	vect (50.0%)
VMOVUPD %YMM1,-0x20(%R11)	1	0	0	0	0	0.50	0	0	0.50	0.50	0.50	0	0	0-1	0.50	vect (50.0%)
VMOVUPD (%R11),%YMM2	1	0	0	0.33	0.33	0	0	0	0	0	0	0	0.33	0-1	0.33	vect (50.0%)
ADD $0x20,%R11	1	0	0	0	0	0	0	0	0	0	0	0	0	1	0.17	N/A
VADDPD %YMM2,%YMM2,%YMM3	1	0	0.50	0	0	0	0.50	0	0	0	0	0	0	3	0.50	vect (50.0%)
VMOVUPD %YMM3,-0x20(%R11)	1	0	0	0	0	0.50	0	0	0.50	0.50	0.50	0	0	0-1	0.50	vect (50.0%)
VMOVUPD (%R11),%YMM4	1	0	0	0.33	0.33	0	0	0	0	0	0	0	0.33	0-1	0.33	vect (50.0%)
ADD $0x20,%R11	1	0	0	0	0	0	0	0	0	0	0	0	0	1	0.17	N/A
VADDPD %YMM4,%YMM4,%YMM5	1	0	0.50	0	0	0	0.50	0	0	0	0	0	0	3	0.50	vect (50.0%)
VMOVUPD %YMM5,-0x20(%R11)	1	0	0	0	0	0.50	0	0	0.50	0.50	0.50	0	0	0-1	0.50	vect (50.0%)
VMOVUPD (%R11),%YMM6	1	0	0	0.33	0.33	0	0	0	0	0	0	0	0.33	0-1	0.33	vect (50.0%)
ADD $0x20,%R11	1	0	0	0	0	0	0	0	0	0	0	0	0	1	0.17	N/A
VADDPD %YMM6,%YMM6,%YMM7	1	0	0.50	0	0	0	0.50	0	0	0	0	0	0	3	0.50	vect (50.0%)
VMOVUPD %YMM7,-0x20(%R11)	1	0	0	0	0	0.50	0	0	0.50	0.50	0.50	0	0	0-1	0.50	vect (50.0%)
VMOVUPD (%R11),%YMM8	1	0	0	0.33	0.33	0	0	0	0	0	0	0	0.33	0-1	0.33	vect (50.0%)
ADD $0x20,%R11	1	0	0	0	0	0	0	0	0	0	0	0	0	1	0.17	N/A
VADDPD %YMM8,%YMM8,%YMM9	1	0	0.50	0	0	0	0.50	0	0	0	0	0	0	3	0.50	vect (50.0%)
VMOVUPD %YMM9,-0x20(%R11)	1	0	0	0	0	0.50	0	0	0.50	0.50	0.50	0	0	0-1	0.50	vect (50.0%)
VMOVUPD (%R11),%YMM10	1	0	0	0.33	0.33	0	0	0	0	0	0	0	0.33	0-1	0.33	vect (50.0%)
ADD $0x20,%R11	1	0	0	0	0	0	0	0	0	0	0	0	0	1	0.17	N/A
VADDPD %YMM10,%YMM10,%YMM11	1	0	0.50	0	0	0	0.50	0	0	0	0	0	0	3	0.50	vect (50.0%)
VMOVUPD %YMM11,-0x20(%R11)	1	0	0	0	0	0.50	0	0	0.50	0.50	0.50	0	0	0-1	0.50	vect (50.0%)
VMOVUPD (%R11),%YMM12	1	0	0	0.33	0.33	0	0	0	0	0	0	0	0.33	0-1	0.33	vect (50.0%)
ADD $0x20,%R11	1	0	0	0	0	0	0	0	0	0	0	0	0	1	0.17	N/A
VADDPD %YMM12,%YMM12,%YMM13	1	0	0.50	0	0	0	0.50	0	0	0	0	0	0	3	0.50	vect (50.0%)
VMOVUPD %YMM13,-0x20(%R11)	1	0	0	0	0	0.50	0	0	0.50	0.50	0.50	0	0	0-1	0.50	vect (50.0%)
CMP %R8,%R11	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1	0.20	scal (12.5%)
JE 402143 <main._omp_fn.3+0x1f3>	1	0.50	0	0	0	0	0	0.50	0	0	0	0	0	0	0.50	N/A
MOV %RAX,%RCX	1	0	0	0	0	0	0	0	0	0	0	0	0	1	0.17	N/A
AND $-0x4,%RCX	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1-2	0.20	N/A
ADD %RCX,%RDX	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1	0.20	N/A
CMP %RCX,%RAX	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1	0.20	scal (12.5%)
JE 4021c0 <main._omp_fn.3+0x270>	1	0.50	0	0	0	0	0	0.50	0	0	0	0	0	0	0.50	N/A
VZEROUPPER	2	0	0	0	0	0	0	0	0	0	0	0	0	0	1	vect (25.0%)
SUB %RCX,%RAX	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1	0.20	N/A
CMP $0x1,%RAX	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1	0.20	scal (12.5%)
JE 40217d <main._omp_fn.3+0x22d>	1	0.50	0	0	0	0	0	0.50	0	0	0	0	0	0	0.50	N/A
ADD %R9,%RCX	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1	0.20	N/A
LEA (%R10,%RCX,8),%RSI	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	N/A
VMOVUPD (%RSI),%XMM14	1	0	0	0.33	0.33	0	0	0	0	0	0	0	0.33	0-1	0.33	vect (25.0%)
VADDPD %XMM14,%XMM14,%XMM15	1	0	0.50	0	0	0	0.50	0	0	0	0	0	0	3	0.50	vect (25.0%)
VMOVUPD %XMM15,(%RSI)	1	0	0	0	0	0.50	0	0	0.50	0.50	0.50	0	0	0-1	0.50	vect (25.0%)
TEST $0x1,%AL	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	2	0.20	N/A
JE 40218d <main._omp_fn.3+0x23d>	1	0.50	0	0	0	0	0	0.50	0	0	0	0	0	0	0.50	N/A
AND $-0x2,%RAX	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1-2	0.20	N/A
ADD %RAX,%RDX	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1	0.20	N/A
VMOVSD (%R10,%RDX,8),%XMM0	1	0	0	0.33	0.33	0	0	0	0	0	0	0	0.33	1	0.33	scal (12.5%)
VADDSD %XMM0,%XMM0,%XMM1	1	0	0.50	0	0	0	0.50	0	0	0	0	0	0	3	0.50	scal (12.5%)
VMOVSD %XMM1,(%R10,%RDX,8)	1	0	0	0	0	0.50	0	0	0.50	0.50	0.50	0	0	1	0.50	scal (12.5%)
MOV -0x8(%RBP),%RBX	1	0	0	0.33	0.33	0	0	0	0	0	0	0	0.33	1	0.33	N/A
LEAVE	3	0.60	0.60	0.33	0.33	0	0.60	0.60	0	0	0	0.60	0.33	2-6	2	N/A
RET	1	0.50	0	0.33	0.33	0	0	0.50	0	0	0	0	0.33	0	2.13	N/A
NOPL (%RAX,%RAX,1)	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	N/A
INC %RAX	1	0	0	0	0	0	0	0	0	0	0	0	0	1	0.17	N/A
XOR %EDX,%EDX	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	N/A
JMP 401f8a <main._omp_fn.3+0x3a>	1	0	0	0	0	0	0	0	0	0	0	0	0	0	2.08	N/A
NOPW (%RAX,%RAX,1)	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	N/A
XOR %ECX,%ECX	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	N/A
MOV $0x3349060e0,%R10	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1	0.28	N/A
JMP 402155 <main._omp_fn.3+0x205>	1	0	0	0	0	0	0	0	0	0	0	0	0	0	5.84	N/A
NOPW %CS:(%RAX,%RAX,1)	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	N/A
VZEROUPPER	2	0	0	0	0	0	0	0	0	0	0	0	0	0	1	vect (25.0%)
MOV -0x8(%RBP),%RBX	1	0	0	0.33	0.33	0	0	0	0	0	0	0	0.33	1	0.33	N/A
LEAVE	3	0.60	0.60	0.33	0.33	0	0.60	0.60	0	0	0	0.60	0.33	2-6	2	N/A
RET	1	0.50	0	0.33	0.33	0	0	0.50	0	0	0	0	0.33	0	2.13	N/A
NOPL (%RAX)	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	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	stream.c:290-292
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 21.17 to 8.67 cycles (2.44x speedup).

Workaround

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

Vectorization

Your function is partially vectorized. Only 31% of vector register length is used (average across all SSE/AVX instructions).

Details

57% of SSE/AVX instructions are used in vector version (process two or more data elements in vector registers):

88% of SSE/AVX loads are used in vector version.
88% of SSE/AVX stores are used in vector version.
88% of SSE/AVX addition or subtraction instructions are used in vector version.
0% of SSE/AVX divide and square root instructions are used in vector version.
11% of SSE/AVX instructions that are not load, store, addition, subtraction nor multiply instructions are used in vector version.

Workaround

Read the "512-bits vectorization" report at "Potential" confidence level.

Execution units bottlenecks

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

512-bits vectorization

Workaround

Recompile with -mprefer-vector-width=512

CALL instructions

Detected function call instructions.

Details

unknown: 2 occurrences►
- /beegfs/hackathon/users/eoseret/qaas_runs_test/isix05.benchmarkcenter.megware.com/177-373-7249/stream-triad/build/stream-triad/src/stream.c:290
- /beegfs/hackathon/users/eoseret/qaas_runs_test/isix05.benchmarkcenter.megware.com/177-373-7249/stream-triad/build/stream-triad/src/stream.c:290

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.

IDIV: 1 occurrences►
- /beegfs/hackathon/users/eoseret/qaas_runs_test/isix05.benchmarkcenter.megware.com/177-373-7249/stream-triad/build/stream-triad/src/stream.c:290
LEAVE: 2 occurrences►
- /beegfs/hackathon/users/eoseret/qaas_runs_test/isix05.benchmarkcenter.megware.com/177-373-7249/stream-triad/build/stream-triad/src/stream.c:290
- /beegfs/hackathon/users/eoseret/qaas_runs_test/isix05.benchmarkcenter.megware.com/177-373-7249/stream-triad/build/stream-triad/src/stream.c:290
VZEROUPPER: 2 occurrences►
- /beegfs/hackathon/users/eoseret/qaas_runs_test/isix05.benchmarkcenter.megware.com/177-373-7249/stream-triad/build/stream-triad/src/stream.c:292
- /beegfs/hackathon/users/eoseret/qaas_runs_test/isix05.benchmarkcenter.megware.com/177-373-7249/stream-triad/build/stream-triad/src/stream.c:290

Vector unaligned load/store instructions

Detected 14 optimal vector unaligned load/store instructions.

Details

VMOVUPD: 14 occurrences►
- /beegfs/hackathon/users/eoseret/qaas_runs_test/isix05.benchmarkcenter.megware.com/177-373-7249/stream-triad/build/stream-triad/src/stream.c:292
- /beegfs/hackathon/users/eoseret/qaas_runs_test/isix05.benchmarkcenter.megware.com/177-373-7249/stream-triad/build/stream-triad/src/stream.c:292
- /beegfs/hackathon/users/eoseret/qaas_runs_test/isix05.benchmarkcenter.megware.com/177-373-7249/stream-triad/build/stream-triad/src/stream.c:292
- /beegfs/hackathon/users/eoseret/qaas_runs_test/isix05.benchmarkcenter.megware.com/177-373-7249/stream-triad/build/stream-triad/src/stream.c:292
- /beegfs/hackathon/users/eoseret/qaas_runs_test/isix05.benchmarkcenter.megware.com/177-373-7249/stream-triad/build/stream-triad/src/stream.c:292
- /beegfs/hackathon/users/eoseret/qaas_runs_test/isix05.benchmarkcenter.megware.com/177-373-7249/stream-triad/build/stream-triad/src/stream.c:292
- /beegfs/hackathon/users/eoseret/qaas_runs_test/isix05.benchmarkcenter.megware.com/177-373-7249/stream-triad/build/stream-triad/src/stream.c:292
- /beegfs/hackathon/users/eoseret/qaas_runs_test/isix05.benchmarkcenter.megware.com/177-373-7249/stream-triad/build/stream-triad/src/stream.c:292
- /beegfs/hackathon/users/eoseret/qaas_runs_test/isix05.benchmarkcenter.megware.com/177-373-7249/stream-triad/build/stream-triad/src/stream.c:292
- /beegfs/hackathon/users/eoseret/qaas_runs_test/isix05.benchmarkcenter.megware.com/177-373-7249/stream-triad/build/stream-triad/src/stream.c:292
- /beegfs/hackathon/users/eoseret/qaas_runs_test/isix05.benchmarkcenter.megware.com/177-373-7249/stream-triad/build/stream-triad/src/stream.c:292
- /beegfs/hackathon/users/eoseret/qaas_runs_test/isix05.benchmarkcenter.megware.com/177-373-7249/stream-triad/build/stream-triad/src/stream.c:292
- /beegfs/hackathon/users/eoseret/qaas_runs_test/isix05.benchmarkcenter.megware.com/177-373-7249/stream-triad/build/stream-triad/src/stream.c:292
- /beegfs/hackathon/users/eoseret/qaas_runs_test/isix05.benchmarkcenter.megware.com/177-373-7249/stream-triad/build/stream-triad/src/stream.c:292

Workaround

Use vector aligned instructions:

align your arrays on 64 bytes boundaries: replace { void *p = malloc (size); } with { void *p; posix_memalign (&p, 64, size); }.
inform your compiler that your arrays are vector aligned: if array 'foo' is 64 bytes-aligned, define a pointer 'p_foo' as __builtin_assume_aligned (foo, 64) and use it instead of 'foo' in the loop.

Conversion instructions

Detected expensive conversion instructions.

Details

CQTO: 1 occurrences►
- /beegfs/hackathon/users/eoseret/qaas_runs_test/isix05.benchmarkcenter.megware.com/177-373-7249/stream-triad/build/stream-triad/src/stream.c:290

Workaround

Avoid mixing data with different types. In particular, check if the type of constants is the same as array elements.

Type of elements and instruction set

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

The binary function is composed of 31 FP arithmetical operations:

31: addition or subtraction

The binary function is loading 264 bytes (33 double precision FP elements). The binary function is storing 248 bytes (31 double precision FP elements).

Arithmetic intensity

Arithmetic intensity is 0.06 FP operations per loaded or stored byte.

General properties

nb instructions	115
nb uops	127
loop length	470
used x86 registers	12
used mmx registers	0
used xmm registers	4
used ymm registers	14
used zmm registers	0
nb stack references	1

Front-end

MACRO FUSION NOT POSSIBLE FIT IN UOP CACHE

micro-operation queue	21.17 cycles
front end	21.17 cycles

Back-end

	P0	P1	P2	P3	P4	P5	P6	P7	P8	P9	P10	P11
uops	14.00	14.10	5.00	5.00	6.50	13.90	14.00	6.50	6.50	6.50	14.00	5.00
cycles	14.00	14.10	5.00	5.00	6.50	13.90	14.00	6.50	6.50	6.50	14.00	5.00

Execution ports to units layout:

P0 (256 bits): VPU, BRU, ALU, DIV/SQRT
P1 (256 bits): ALU, VPU
P2 (512 bits): load
P3 (512 bits): load
P4 (512 bits): store data
P5 (512 bits): ALU, VPU
P6: ALU, BRU
P7: store address
P8: store address
P9 (512 bits): store data
P10: ALU
P11 (512 bits): load

Cycles executing div or sqrt instructions

10.00

Cycles summary

Front-end	21.17
Dispatch	14.10
DIV/SQRT	10.00
Overall L1	21.17

Vectorization ratios

INT

all	11%
load	NA (no load vectorizable/vectorized instructions)
store	NA (no store vectorizable/vectorized instructions)
mul	NA (no mul vectorizable/vectorized instructions)
add-sub	NA (no add-sub vectorizable/vectorized instructions)
fma	NA (no fma vectorizable/vectorized instructions)
other	11%

all	88%
load	88%
store	88%
mul	NA (no mul vectorizable/vectorized instructions)
add-sub	88%
fma	NA (no fma vectorizable/vectorized instructions)
div/sqrt	NA (no div/sqrt vectorizable/vectorized instructions)
other	NA (no other vectorizable/vectorized instructions)

INT+FP

all	57%
load	88%
store	88%
mul	NA (no mul vectorizable/vectorized instructions)
add-sub	88%
fma	NA (no fma vectorizable/vectorized instructions)
div/sqrt	0%
other	11%

Vector efficiency ratios

INT

all	13%
load	NA (no load vectorizable/vectorized instructions)
store	NA (no store vectorizable/vectorized instructions)
mul	NA (no mul vectorizable/vectorized instructions)
add-sub	NA (no add-sub vectorizable/vectorized instructions)
fma	NA (no fma vectorizable/vectorized instructions)
other	13%

all	43%
load	43%
store	43%
mul	NA (no mul vectorizable/vectorized instructions)
add-sub	43%
fma	NA (no fma vectorizable/vectorized instructions)
div/sqrt	NA (no div/sqrt vectorizable/vectorized instructions)
other	NA (no other vectorizable/vectorized instructions)

INT+FP

all	31%
load	43%
store	43%
mul	NA (no mul vectorizable/vectorized instructions)
add-sub	43%
fma	NA (no fma vectorizable/vectorized instructions)
div/sqrt	12%
other	13%

Cycles and memory resources usage

Assuming all data fit into the L1 cache, each call to the function takes 21.17 cycles. At this rate:

6% of peak load performance is reached (12.47 out of 192.00 bytes loaded per cycle (GB/s @ 1GHz))
9% of peak store performance is reached (11.72 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: 401f50

Instruction	Nb FU	P0	P1	P2	P3	P4	P5	P6	P7	P8	P9	P10	P11	Latency	Recip. throughput	Vectorization
PUSH %RBP	1	0	0	0	0	0.50	0	0	0.50	0.50	0.50	0	0	5-12	0.50	N/A
MOV $0x401060,%RAX	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1	0.28	N/A
MOV %RSP,%RBP	1	0	0	0	0	0	0	0	0	0	0	0	0	1	0.17	N/A
PUSH %RBX	1	0	0	0	0	0.50	0	0	0.50	0.50	0.50	0	0	5-12	0.50	N/A
AND $-0x20,%RSP	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1-2	0.20	scal (12.5%)
CALL %RAX	2	0.50	0	0	0	0.50	0	0.50	0.50	0.50	0.50	0	0	0	2.14	N/A
MOVSXD %EAX,%RBX	1	0	0.33	0	0	0	0.33	0	0	0	0	0.33	0	1	0.33	N/A
MOV $0x401030,%RAX	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1	0.28	N/A
CALL %RAX	2	0.50	0	0	0	0.50	0	0.50	0.50	0.50	0.50	0	0	0	2.14	N/A
MOVSXD %EAX,%RCX	1	0	0.33	0	0	0	0.33	0	0	0	0	0.33	0	1	0.33	N/A
MOV $0x33450000,%EAX	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1	0.20	N/A
CQTO	1	0.50	0	0	0	0	0	0.50	0	0	0	0	0	1	0.50	scal (12.5%)
IDIV %RBX	5	0	3	0	0	0	0	0	0	0	0	0	0	11-16	10	scal (12.5%)
CMP %RDX,%RCX	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1	0.20	scal (12.5%)
JL 402198 <main._omp_fn.3+0x248>	1	0.50	0	0	0	0	0	0.50	0	0	0	0	0	0	0.50	N/A
IMUL %RAX,%RCX	1	0	1	0	0	0	0	0	0	0	0	0	0	3	1	N/A
ADD %RCX,%RDX	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1	0.20	N/A
LEA (%RAX,%RDX,1),%RSI	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	N/A
CMP %RSI,%RDX	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1	0.20	scal (12.5%)
JGE 40218d <main._omp_fn.3+0x23d>	1	0.50	0	0	0	0	0	0.50	0	0	0	0	0	0	0.50	N/A
LEA -0x1(%RAX),%RDI	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	N/A
MOV %RDX,%R9	1	0	0	0	0	0	0	0	0	0	0	0	0	1	0.17	scal (12.5%)
CMP $0x2,%RDI	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1	0.20	scal (12.5%)
JBE 4021a8 <main._omp_fn.3+0x258>	1	0.50	0	0	0	0	0	0.50	0	0	0	0	0	0	0.50	N/A
MOV %RAX,%RBX	1	0	0	0	0	0	0	0	0	0	0	0	0	1	0.17	N/A
MOV $0x3349060e0,%R10	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1	0.28	N/A
SHR $0x2,%RBX	1	0.50	0	0	0	0	0	0.50	0	0	0	0	0	0-2	0.50	N/A
SAL $0x5,%RBX	1	0.50	0	0	0	0	0	0.50	0	0	0	0	0	0-2	0.50	N/A
LEA (%R10,%RDX,8),%R11	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	N/A
LEA (%RBX,%R11,1),%R8	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	N/A
SUB $0x20,%RBX	1	0	0	0	0	0	0	0	0	0	0	0	0	1	0.17	N/A
SHR $0x5,%RBX	1	0.50	0	0	0	0	0	0.50	0	0	0	0	0	0-2	0.50	N/A
INC %RBX	1	0	0	0	0	0	0	0	0	0	0	0	0	1	0.17	N/A
AND $0x7,%EBX	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1-2	0.20	N/A
JE 402099 <main._omp_fn.3+0x149>	1	0.50	0	0	0	0	0	0.50	0	0	0	0	0	0	0.50	N/A
CMP $0x1,%RBX	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1	0.20	scal (12.5%)
JE 40207c <main._omp_fn.3+0x12c>	1	0.50	0	0	0	0	0	0.50	0	0	0	0	0	0	0.50	N/A
CMP $0x2,%RBX	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1	0.20	scal (12.5%)
JE 402068 <main._omp_fn.3+0x118>	1	0.50	0	0	0	0	0	0.50	0	0	0	0	0	0	0.50	N/A
CMP $0x3,%RBX	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1	0.20	scal (12.5%)
JE 402054 <main._omp_fn.3+0x104>	1	0.50	0	0	0	0	0	0.50	0	0	0	0	0	0	0.50	N/A
CMP $0x4,%RBX	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1	0.20	scal (12.5%)
JE 402041 <main._omp_fn.3+0xf1>	1	0.50	0	0	0	0	0	0.50	0	0	0	0	0	0	0.50	N/A
CMP $0x5,%RBX	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1	0.20	scal (12.5%)
JE 40202e <main._omp_fn.3+0xde>	1	0.50	0	0	0	0	0	0.50	0	0	0	0	0	0	0.50	N/A
CMP $0x6,%RBX	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1	0.20	scal (12.5%)
JE 40201b <main._omp_fn.3+0xcb>	1	0.50	0	0	0	0	0	0.50	0	0	0	0	0	0	0.50	N/A
VMOVUPD (%R11),%YMM0	1	0	0	0.33	0.33	0	0	0	0	0	0	0	0.33	0-1	0.33	vect (50.0%)
ADD $0x20,%R11	1	0	0	0	0	0	0	0	0	0	0	0	0	1	0.17	N/A
VADDPD %YMM0,%YMM0,%YMM1	1	0	0.50	0	0	0	0.50	0	0	0	0	0	0	3	0.50	vect (50.0%)
VMOVUPD %YMM1,-0x20(%R11)	1	0	0	0	0	0.50	0	0	0.50	0.50	0.50	0	0	0-1	0.50	vect (50.0%)
VMOVUPD (%R11),%YMM2	1	0	0	0.33	0.33	0	0	0	0	0	0	0	0.33	0-1	0.33	vect (50.0%)
ADD $0x20,%R11	1	0	0	0	0	0	0	0	0	0	0	0	0	1	0.17	N/A
VADDPD %YMM2,%YMM2,%YMM3	1	0	0.50	0	0	0	0.50	0	0	0	0	0	0	3	0.50	vect (50.0%)
VMOVUPD %YMM3,-0x20(%R11)	1	0	0	0	0	0.50	0	0	0.50	0.50	0.50	0	0	0-1	0.50	vect (50.0%)
VMOVUPD (%R11),%YMM4	1	0	0	0.33	0.33	0	0	0	0	0	0	0	0.33	0-1	0.33	vect (50.0%)
ADD $0x20,%R11	1	0	0	0	0	0	0	0	0	0	0	0	0	1	0.17	N/A
VADDPD %YMM4,%YMM4,%YMM5	1	0	0.50	0	0	0	0.50	0	0	0	0	0	0	3	0.50	vect (50.0%)
VMOVUPD %YMM5,-0x20(%R11)	1	0	0	0	0	0.50	0	0	0.50	0.50	0.50	0	0	0-1	0.50	vect (50.0%)
VMOVUPD (%R11),%YMM6	1	0	0	0.33	0.33	0	0	0	0	0	0	0	0.33	0-1	0.33	vect (50.0%)
ADD $0x20,%R11	1	0	0	0	0	0	0	0	0	0	0	0	0	1	0.17	N/A
VADDPD %YMM6,%YMM6,%YMM7	1	0	0.50	0	0	0	0.50	0	0	0	0	0	0	3	0.50	vect (50.0%)
VMOVUPD %YMM7,-0x20(%R11)	1	0	0	0	0	0.50	0	0	0.50	0.50	0.50	0	0	0-1	0.50	vect (50.0%)
VMOVUPD (%R11),%YMM8	1	0	0	0.33	0.33	0	0	0	0	0	0	0	0.33	0-1	0.33	vect (50.0%)
ADD $0x20,%R11	1	0	0	0	0	0	0	0	0	0	0	0	0	1	0.17	N/A
VADDPD %YMM8,%YMM8,%YMM9	1	0	0.50	0	0	0	0.50	0	0	0	0	0	0	3	0.50	vect (50.0%)
VMOVUPD %YMM9,-0x20(%R11)	1	0	0	0	0	0.50	0	0	0.50	0.50	0.50	0	0	0-1	0.50	vect (50.0%)
VMOVUPD (%R11),%YMM10	1	0	0	0.33	0.33	0	0	0	0	0	0	0	0.33	0-1	0.33	vect (50.0%)
ADD $0x20,%R11	1	0	0	0	0	0	0	0	0	0	0	0	0	1	0.17	N/A
VADDPD %YMM10,%YMM10,%YMM11	1	0	0.50	0	0	0	0.50	0	0	0	0	0	0	3	0.50	vect (50.0%)
VMOVUPD %YMM11,-0x20(%R11)	1	0	0	0	0	0.50	0	0	0.50	0.50	0.50	0	0	0-1	0.50	vect (50.0%)
VMOVUPD (%R11),%YMM12	1	0	0	0.33	0.33	0	0	0	0	0	0	0	0.33	0-1	0.33	vect (50.0%)
ADD $0x20,%R11	1	0	0	0	0	0	0	0	0	0	0	0	0	1	0.17	N/A
VADDPD %YMM12,%YMM12,%YMM13	1	0	0.50	0	0	0	0.50	0	0	0	0	0	0	3	0.50	vect (50.0%)
VMOVUPD %YMM13,-0x20(%R11)	1	0	0	0	0	0.50	0	0	0.50	0.50	0.50	0	0	0-1	0.50	vect (50.0%)
CMP %R8,%R11	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1	0.20	scal (12.5%)
JE 402143 <main._omp_fn.3+0x1f3>	1	0.50	0	0	0	0	0	0.50	0	0	0	0	0	0	0.50	N/A
MOV %RAX,%RCX	1	0	0	0	0	0	0	0	0	0	0	0	0	1	0.17	N/A
AND $-0x4,%RCX	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1-2	0.20	N/A
ADD %RCX,%RDX	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1	0.20	N/A
CMP %RCX,%RAX	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1	0.20	scal (12.5%)
JE 4021c0 <main._omp_fn.3+0x270>	1	0.50	0	0	0	0	0	0.50	0	0	0	0	0	0	0.50	N/A
VZEROUPPER	2	0	0	0	0	0	0	0	0	0	0	0	0	0	1	vect (25.0%)
SUB %RCX,%RAX	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1	0.20	N/A
CMP $0x1,%RAX	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1	0.20	scal (12.5%)
JE 40217d <main._omp_fn.3+0x22d>	1	0.50	0	0	0	0	0	0.50	0	0	0	0	0	0	0.50	N/A
ADD %R9,%RCX	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1	0.20	N/A
LEA (%R10,%RCX,8),%RSI	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	N/A
VMOVUPD (%RSI),%XMM14	1	0	0	0.33	0.33	0	0	0	0	0	0	0	0.33	0-1	0.33	vect (25.0%)
VADDPD %XMM14,%XMM14,%XMM15	1	0	0.50	0	0	0	0.50	0	0	0	0	0	0	3	0.50	vect (25.0%)
VMOVUPD %XMM15,(%RSI)	1	0	0	0	0	0.50	0	0	0.50	0.50	0.50	0	0	0-1	0.50	vect (25.0%)
TEST $0x1,%AL	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	2	0.20	N/A
JE 40218d <main._omp_fn.3+0x23d>	1	0.50	0	0	0	0	0	0.50	0	0	0	0	0	0	0.50	N/A
AND $-0x2,%RAX	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1-2	0.20	N/A
ADD %RAX,%RDX	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1	0.20	N/A
VMOVSD (%R10,%RDX,8),%XMM0	1	0	0	0.33	0.33	0	0	0	0	0	0	0	0.33	1	0.33	scal (12.5%)
VADDSD %XMM0,%XMM0,%XMM1	1	0	0.50	0	0	0	0.50	0	0	0	0	0	0	3	0.50	scal (12.5%)
VMOVSD %XMM1,(%R10,%RDX,8)	1	0	0	0	0	0.50	0	0	0.50	0.50	0.50	0	0	1	0.50	scal (12.5%)
MOV -0x8(%RBP),%RBX	1	0	0	0.33	0.33	0	0	0	0	0	0	0	0.33	1	0.33	N/A
LEAVE	3	0.60	0.60	0.33	0.33	0	0.60	0.60	0	0	0	0.60	0.33	2-6	2	N/A
RET	1	0.50	0	0.33	0.33	0	0	0.50	0	0	0	0	0.33	0	2.13	N/A
NOPL (%RAX,%RAX,1)	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	N/A
INC %RAX	1	0	0	0	0	0	0	0	0	0	0	0	0	1	0.17	N/A
XOR %EDX,%EDX	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	N/A
JMP 401f8a <main._omp_fn.3+0x3a>	1	0	0	0	0	0	0	0	0	0	0	0	0	0	2.08	N/A
NOPW (%RAX,%RAX,1)	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	N/A
XOR %ECX,%ECX	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	N/A
MOV $0x3349060e0,%R10	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1	0.28	N/A
JMP 402155 <main._omp_fn.3+0x205>	1	0	0	0	0	0	0	0	0	0	0	0	0	0	5.84	N/A
NOPW %CS:(%RAX,%RAX,1)	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	N/A
VZEROUPPER	2	0	0	0	0	0	0	0	0	0	0	0	0	0	1	vect (25.0%)
MOV -0x8(%RBP),%RBX	1	0	0	0.33	0.33	0	0	0	0	0	0	0	0.33	1	0.33	N/A
LEAVE	3	0.60	0.60	0.33	0.33	0	0.60	0.60	0	0	0	0.60	0.33	2-6	2	N/A
RET	1	0.50	0	0.33	0.33	0	0	0.50	0	0	0	0	0.33	0	2.13	N/A
NOPL (%RAX)	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	N/A

Name	Coverage (%)	Time (s)
▼main._omp_fn.3–	0.64	0.03
○Loop 4 - stream.c:292-292 - exec	0.64	0.03

Report Configuration

Code clean check

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Execution units bottlenecks

512-bits vectorization

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CALL instructions

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Complex instructions

Details

Vector unaligned load/store instructions

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Conversion instructions

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Workaround

Type of elements and instruction set

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

Arithmetic intensity

General properties

Front-end

Back-end

Cycles summary

Vectorization ratios

Vector efficiency ratios

Cycles and memory resources usage

Front-end bottlenecks

ASM code

Code clean check

Workaround

Vectorization

Details

Workaround

Execution units bottlenecks

512-bits vectorization

Workaround

CALL instructions

Details

Complex instructions

Details

Vector unaligned load/store instructions

Details

Workaround

Conversion instructions

Details

Workaround

Type of elements and instruction set

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

Arithmetic intensity

General properties

Front-end

Back-end

Cycles summary

Vectorization ratios

Vector efficiency ratios

Cycles and memory resources usage

Front-end bottlenecks

ASM code