OV - exec - Function main.omp

	Function: main.omp_outlined.18	Module: exec	Source: stream.c:290-292	Coverage (incl. loops): 0.17% \| (excl. loops): 0.00%

/beegfs/hackathon/users/eoseret/qaas_runs_test/isix02.benchmarkcenter.megware.com/177-373-7005/stream/build/stream/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];

0x203710 PUSH	%RBP

0x203711 MOV	%RSP,%RBP

0x203714 PUSH	%R14

0x203716 PUSH	%RBX

0x203717 SUB	$0x20,%RSP

0x20371b MOVQ	$0,-0x28(%RBP)

0x203723 MOVQ	$0x3344ffff,-0x18(%RBP)

0x20372b LEA	0x38fe(%RIP),%RBX

0x203732 MOVQ	$0x1,-0x30(%RBP)

0x20373a MOVL	$0,-0x1c(%RBP)

0x203741 MOV	(%RDI),%R14D

0x203744 SUB	$0x8,%RSP

0x203748 LEA	-0x30(%RBP),%RAX

0x20374c MOV	$0x1108,%RDI

0x203756 ADD	%RBX,%RDI

0x203759 LEA	-0x1c(%RBP),%RCX

0x20375d LEA	-0x28(%RBP),%R8

0x203761 LEA	-0x18(%RBP),%R9

0x203765 MOV	%R14D,%ESI

0x203768 MOV	$0x22,%EDX

0x20376d PUSH	$0x1

0x20376f PUSH	$0x1

0x203771 PUSH	%RAX

0x203772 CALL	204e20 <@plt_start@+0x80>

0x203777 ADD	$0x20,%RSP

0x20377b MOV	-0x18(%RBP),%RCX

0x20377f CMP	$0x3344ffff,%RCX

0x203786 MOV	$0x3344ffff,%EAX

0x20378b CMOVL	%RCX,%RAX

0x20378f MOV	%RAX,-0x18(%RBP)

0x203793 MOV	-0x28(%RBP),%RCX

0x203797 CMP	%RAX,%RCX

0x20379a JG	2038a8

0x2037a0 MOV	%RAX,%RSI

0x2037a3 SUB	%RCX,%RSI

0x2037a6 INC	%RSI

0x2037a9 MOV	$0x1270,%RDX

0x2037b3 CMP	$0x4,%RSI

0x2037b7 JB	203883

0x2037bd CMP	$0x20,%RSI

0x2037c1 JAE	2037ca

0x2037c3 XOR	%EDI,%EDI

0x2037c5 JMP	20384a

0x2037ca MOV	%RSI,%RDI

0x2037cd AND	$-0x20,%RDI

0x2037d1 LEA	(%RBX,%RDX,1),%R8

0x2037d5 LEA	0xc0(%R8,%RCX,8),%R8

0x2037dd XOR	%R9D,%R9D

(6) 0x2037e0 VMOVUPD	-0xc0(%R8,%R9,8),%ZMM0

(6) 0x2037e8 VMOVUPD	-0x80(%R8,%R9,8),%ZMM1

(6) 0x2037f0 VMOVUPD	-0x40(%R8,%R9,8),%ZMM2

(6) 0x2037f8 VMOVUPD	(%R8,%R9,8),%ZMM3

(6) 0x2037ff VADDPD	%ZMM0,%ZMM0,%ZMM0

(6) 0x203805 VADDPD	%ZMM1,%ZMM1,%ZMM1

(6) 0x20380b VADDPD	%ZMM2,%ZMM2,%ZMM2

(6) 0x203811 VADDPD	%ZMM3,%ZMM3,%ZMM3

(6) 0x203817 VMOVUPD	%ZMM0,-0xc0(%R8,%R9,8)

(6) 0x20381f VMOVUPD	%ZMM1,-0x80(%R8,%R9,8)

(6) 0x203827 VMOVUPD	%ZMM2,-0x40(%R8,%R9,8)

(6) 0x20382f VMOVUPD	%ZMM3,(%R8,%R9,8)

(6) 0x203836 ADD	$0x20,%R9

(6) 0x20383a CMP	%R9,%RDI

(6) 0x20383d JNE	2037e0

0x20383f CMP	%RDI,%RSI

0x203842 JE	2038a8

0x203844 TEST	$0x1c,%SIL

0x203848 JE	203880

0x20384a MOV	%RSI,%R8

0x20384d AND	$-0x4,%R8

0x203851 LEA	(%RBX,%RDX,1),%R9

0x203855 LEA	(%R9,%RCX,8),%R9

0x203859 ADD	%R8,%RCX

0x20385c NOPL	(%RAX)

(7) 0x203860 VMOVUPD	(%R9,%RDI,8),%YMM0

(7) 0x203866 VADDPD	%YMM0,%YMM0,%YMM0

(7) 0x20386a VMOVUPD	%YMM0,(%R9,%RDI,8)

(7) 0x203870 ADD	$0x4,%RDI

(7) 0x203874 CMP	%RDI,%R8

(7) 0x203877 JNE	203860

0x203879 CMP	%R8,%RSI

0x20387c JNE	203883

0x20387e JMP	2038a8

0x203880 ADD	%RDI,%RCX

0x203883 DEC	%RCX

0x203886 ADD	%RBX,%RDX

0x203889 NOPL	(%RAX)

(5) 0x203890 VMOVSD	0x8(%RDX,%RCX,8),%XMM0

(5) 0x203896 VADDSD	%XMM0,%XMM0,%XMM0

(5) 0x20389a VMOVSD	%XMM0,0x8(%RDX,%RCX,8)

(5) 0x2038a0 INC	%RCX

(5) 0x2038a3 CMP	%RAX,%RCX

(5) 0x2038a6 JL	203890

0x2038a8 MOV	$0x1120,%RAX

0x2038b2 ADD	%RAX,%RBX

0x2038b5 MOV	%RBX,%RDI

0x2038b8 MOV	%R14D,%ESI

0x2038bb VZEROUPPER

0x2038be CALL	204e40 <@plt_start@+0xa0>

0x2038c3 ADD	$0x20,%RSP

0x2038c7 POP	%RBX

0x2038c8 POP	%R14

0x2038ca POP	%RBP

0x2038cb RET

0x2038cc NOPL	(%RAX)

Coverage (%)	Name	Source Location	Module
►99.24+	__kmp_invoke_microtask		libomp.so
○	__kmp_invoke_task_func		libomp.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 0.00% of application time for run aocc_7

Source file and lines	stream.c:290-292
Module	exec

The function is defined in /beegfs/hackathon/users/eoseret/qaas_runs_test/isix02.benchmarkcenter.megware.com/177-373-7005/stream/build/stream/src/stream.c:290-292.

Warnings:
Ignoring paths for analysis

gain
potential
hint
expert

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 13.33 to 0.96 cycles (13.84x 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.

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.

unknown: 2 occurrences►
- /beegfs/hackathon/users/eoseret/qaas_runs_test/isix02.benchmarkcenter.megware.com/177-373-7005/stream/build/stream/src/stream.c:290
- /beegfs/hackathon/users/eoseret/qaas_runs_test/isix02.benchmarkcenter.megware.com/177-373-7005/stream/build/stream/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.

VZEROUPPER: 1 occurrences►
- /beegfs/hackathon/users/eoseret/qaas_runs_test/isix02.benchmarkcenter.megware.com/177-373-7005/stream/build/stream/src/stream.c:290

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 20 bytes. The binary function is storing 36 bytes.

General properties

nb instructions	77
nb uops	80
loop length	304
used x86 registers	11
used mmx registers	0
used xmm registers	0
used ymm registers	0
used zmm registers	0
nb stack references	4

Front-end

MACRO FUSION NOT POSSIBLE FIT IN UOP CACHE

micro-operation queue	13.33 cycles
front end	13.33 cycles

Back-end

	P0	P1	P2	P3	P4	P5	P6	P7	P8	P9	P10	P11
uops	5.80	5.80	2.33	2.33	6.50	5.80	5.80	6.50	6.50	6.50	5.80	2.33
cycles	5.80	5.80	2.33	2.33	6.50	5.80	5.80	6.50	6.50	6.50	5.80	2.33

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

Cycles summary

Front-end	13.33
Dispatch	6.50
Overall L1	13.33

Vectorization ratios

all	5%
load	0%
store	0%
mul	NA (no mul vectorizable/vectorized instructions)
add-sub	0%
fma	NA (no fma vectorizable/vectorized instructions)
div/sqrt	NA (no div/sqrt vectorizable/vectorized instructions)
other	10%

Vector efficiency ratios

all	10%
load	6%
store	7%
mul	NA (no mul vectorizable/vectorized instructions)
add-sub	12%
fma	NA (no fma vectorizable/vectorized instructions)
div/sqrt	NA (no div/sqrt vectorizable/vectorized instructions)
other	12%

Cycles and memory resources usage

Assuming all data fit into the L1 cache, each call to the function takes 13.33 cycles. At this rate:

0% of peak load performance is reached (1.50 out of 192.00 bytes loaded per cycle (GB/s @ 1GHz))
2% of peak store performance is reached (2.70 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 13.33 to 6.50 cycles (2.05x speedup).

ASM code

In the binary file, the address of the function is: 203710

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 %RSP,%RBP	1	0	0	0	0	0	0	0	0	0	0	0	0	1	0.17	N/A
PUSH %R14	1	0	0	0	0	0.50	0	0	0.50	0.50	0.50	0	0	5-12	0.50	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
SUB $0x20,%RSP	1	0	0	0	0	0	0	0	0	0	0	0	0	1	0.17	N/A
MOVQ $0,-0x28(%RBP)	1	0	0	0	0	0.50	0	0	0.50	0.50	0.50	0	0	1	0.50	scal (6.3%)
MOVQ $0x3344ffff,-0x18(%RBP)	1	0	0	0	0	0.50	0	0	0.50	0.50	0.50	0	0	1	0.50	scal (6.3%)
LEA 0x38fe(%RIP),%RBX	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	N/A
MOVQ $0x1,-0x30(%RBP)	1	0	0	0	0	0.50	0	0	0.50	0.50	0.50	0	0	1	0.50	scal (6.3%)
MOVL $0,-0x1c(%RBP)	1	0	0	0	0	0.50	0	0	0.50	0.50	0.50	0	0	1	0.50	scal (6.3%)
MOV (%RDI),%R14D	1	0	0	0.33	0.33	0	0	0	0	0	0	0	0.33	1	0.33	scal (6.3%)
SUB $0x8,%RSP	1	0	0	0	0	0	0	0	0	0	0	0	0	1	0.17	N/A
LEA -0x30(%RBP),%RAX	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	N/A
MOV $0x1108,%RDI	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1	0.28	N/A
ADD %RBX,%RDI	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1	0.20	N/A
LEA -0x1c(%RBP),%RCX	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	N/A
LEA -0x28(%RBP),%R8	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	N/A
LEA -0x18(%RBP),%R9	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	N/A
MOV %R14D,%ESI	1	0	0	0	0	0	0	0	0	0	0	0	0	1	0.17	scal (6.3%)
MOV $0x22,%EDX	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1	0.20	N/A
PUSH $0x1	1	0	0	0	0	0.50	0	0	0.50	0.50	0.50	0	0	5-12	0.50	N/A
PUSH $0x1	1	0	0	0	0	0.50	0	0	0.50	0.50	0.50	0	0	5-12	0.50	N/A
PUSH %RAX	1	0	0	0	0	0.50	0	0	0.50	0.50	0.50	0	0	5-12	0.50	N/A
CALL 204e20 <@plt_start@+0x80>	2	0	0	0	0	0.50	0	0	0.50	0.50	0.50	0	0	0	1	N/A
ADD $0x20,%RSP	1	0	0	0	0	0	0	0	0	0	0	0	0	1	0.17	N/A
MOV -0x18(%RBP),%RCX	1	0	0	0.33	0.33	0	0	0	0	0	0	0	0.33	1	0.33	N/A
CMP $0x3344ffff,%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%)
MOV $0x3344ffff,%EAX	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1	0.20	N/A
CMOVL %RCX,%RAX	1	0.50	0	0	0	0	0	0.50	0	0	0	0	0	1	0.50	N/A
MOV %RAX,-0x18(%RBP)	1	0	0	0	0	0.50	0	0	0.50	0.50	0.50	0	0	1	0.50	scal (12.5%)
MOV -0x28(%RBP),%RCX	1	0	0	0.33	0.33	0	0	0	0	0	0	0	0.33	1	0.33	N/A
CMP %RAX,%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%)
JG 2038a8 <main.omp_outlined.18+0x198>	1	0.50	0	0	0	0	0	0.50	0	0	0	0	0	0	0.50	N/A
MOV %RAX,%RSI	1	0	0	0	0	0	0	0	0	0	0	0	0	1	0.17	scal (12.5%)
SUB %RCX,%RSI	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1	0.20	scal (12.5%)
INC %RSI	1	0	0	0	0	0	0	0	0	0	0	0	0	1	0.17	scal (12.5%)
MOV $0x1270,%RDX	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1	0.28	N/A
CMP $0x4,%RSI	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1	0.20	scal (12.5%)
JB 203883 <main.omp_outlined.18+0x173>	1	0.50	0	0	0	0	0	0.50	0	0	0	0	0	0	0.50	N/A
CMP $0x20,%RSI	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1	0.20	scal (12.5%)
JAE 2037ca <main.omp_outlined.18+0xba>	1	0.50	0	0	0	0	0	0.50	0	0	0	0	0	0	0.50	N/A
XOR %EDI,%EDI	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	N/A
JMP 20384a <main.omp_outlined.18+0x13a>	1	0	0	0	0	0	0	0	0	0	0	0	0	0	2.08	N/A
MOV %RSI,%RDI	1	0	0	0	0	0	0	0	0	0	0	0	0	1	0.17	N/A
AND $-0x20,%RDI	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1-2	0.20	N/A
LEA (%RBX,%RDX,1),%R8	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	N/A
LEA 0xc0(%R8,%RCX,8),%R8	1	0	1	0	0	0	0	0	0	0	0	0	0	3	1	N/A
XOR %R9D,%R9D	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	N/A
CMP %RDI,%RSI	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 2038a8 <main.omp_outlined.18+0x198>	1	0.50	0	0	0	0	0	0.50	0	0	0	0	0	0	0.50	N/A
TEST $0x1c,%SIL	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	2	0.20	N/A
JE 203880 <main.omp_outlined.18+0x170>	1	0.50	0	0	0	0	0	0.50	0	0	0	0	0	0	0.50	N/A
MOV %RSI,%R8	1	0	0	0	0	0	0	0	0	0	0	0	0	1	0.17	N/A
AND $-0x4,%R8	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1-2	0.20	N/A
LEA (%RBX,%RDX,1),%R9	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	N/A
LEA (%R9,%RCX,8),%R9	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	N/A
ADD %R8,%RCX	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1	0.20	N/A
NOPL (%RAX)	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	N/A
CMP %R8,%RSI	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1	0.20	scal (12.5%)
JNE 203883 <main.omp_outlined.18+0x173>	1	0.50	0	0	0	0	0	0.50	0	0	0	0	0	0	0.50	N/A
JMP 2038a8 <main.omp_outlined.18+0x198>	1	0	0	0	0	0	0	0	0	0	0	0	0	0	5.84	N/A
ADD %RDI,%RCX	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1	0.20	N/A
DEC %RCX	1	0	0	0	0	0	0	0	0	0	0	0	0	1	0.17	N/A
ADD %RBX,%RDX	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1	0.20	N/A
NOPL (%RAX)	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	N/A
MOV $0x1120,%RAX	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1	0.28	N/A
ADD %RAX,%RBX	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1	0.20	N/A
MOV %RBX,%RDI	1	0	0	0	0	0	0	0	0	0	0	0	0	1	0.17	N/A
MOV %R14D,%ESI	1	0	0	0	0	0	0	0	0	0	0	0	0	1	0.17	scal (6.3%)
VZEROUPPER	2	0	0	0	0	0	0	0	0	0	0	0	0	0	1	vect (25.0%)
CALL 204e40 <@plt_start@+0xa0>	2	0	0	0	0	0.50	0	0	0.50	0.50	0.50	0	0	0	1	N/A
ADD $0x20,%RSP	1	0	0	0	0	0	0	0	0	0	0	0	0	1	0.17	N/A
POP %RBX	1	0	0	0.33	0.33	0	0	0	0	0	0	0	0.33	1-6	0.33	N/A
POP %R14	1	0	0	0.33	0.33	0	0	0	0	0	0	0	0.33	1-6	0.33	N/A
POP %RBP	1	0	0	0.33	0.33	0	0	0	0	0	0	0	0.33	1-6	0.33	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 aocc_7

Source file and lines	stream.c:290-292
Module	exec

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

unknown: 2 occurrences►
- /beegfs/hackathon/users/eoseret/qaas_runs_test/isix02.benchmarkcenter.megware.com/177-373-7005/stream/build/stream/src/stream.c:290
- /beegfs/hackathon/users/eoseret/qaas_runs_test/isix02.benchmarkcenter.megware.com/177-373-7005/stream/build/stream/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.

VZEROUPPER: 1 occurrences►
- /beegfs/hackathon/users/eoseret/qaas_runs_test/isix02.benchmarkcenter.megware.com/177-373-7005/stream/build/stream/src/stream.c:290

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 20 bytes. The binary function is storing 36 bytes.

General properties

nb instructions	77
nb uops	80
loop length	304
used x86 registers	11
used mmx registers	0
used xmm registers	0
used ymm registers	0
used zmm registers	0
nb stack references	4

Front-end

MACRO FUSION NOT POSSIBLE FIT IN UOP CACHE

micro-operation queue	13.33 cycles
front end	13.33 cycles

Back-end

	P0	P1	P2	P3	P4	P5	P6	P7	P8	P9	P10	P11
uops	5.80	5.80	2.33	2.33	6.50	5.80	5.80	6.50	6.50	6.50	5.80	2.33
cycles	5.80	5.80	2.33	2.33	6.50	5.80	5.80	6.50	6.50	6.50	5.80	2.33

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

Cycles summary

Front-end	13.33
Dispatch	6.50
Overall L1	13.33

Vectorization ratios

all	5%
load	0%
store	0%
mul	NA (no mul vectorizable/vectorized instructions)
add-sub	0%
fma	NA (no fma vectorizable/vectorized instructions)
div/sqrt	NA (no div/sqrt vectorizable/vectorized instructions)
other	10%

Vector efficiency ratios

all	10%
load	6%
store	7%
mul	NA (no mul vectorizable/vectorized instructions)
add-sub	12%
fma	NA (no fma vectorizable/vectorized instructions)
div/sqrt	NA (no div/sqrt vectorizable/vectorized instructions)
other	12%

Cycles and memory resources usage

Assuming all data fit into the L1 cache, each call to the function takes 13.33 cycles. At this rate:

0% of peak load performance is reached (1.50 out of 192.00 bytes loaded per cycle (GB/s @ 1GHz))
2% of peak store performance is reached (2.70 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: 203710

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 %RSP,%RBP	1	0	0	0	0	0	0	0	0	0	0	0	0	1	0.17	N/A
PUSH %R14	1	0	0	0	0	0.50	0	0	0.50	0.50	0.50	0	0	5-12	0.50	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
SUB $0x20,%RSP	1	0	0	0	0	0	0	0	0	0	0	0	0	1	0.17	N/A
MOVQ $0,-0x28(%RBP)	1	0	0	0	0	0.50	0	0	0.50	0.50	0.50	0	0	1	0.50	scal (6.3%)
MOVQ $0x3344ffff,-0x18(%RBP)	1	0	0	0	0	0.50	0	0	0.50	0.50	0.50	0	0	1	0.50	scal (6.3%)
LEA 0x38fe(%RIP),%RBX	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	N/A
MOVQ $0x1,-0x30(%RBP)	1	0	0	0	0	0.50	0	0	0.50	0.50	0.50	0	0	1	0.50	scal (6.3%)
MOVL $0,-0x1c(%RBP)	1	0	0	0	0	0.50	0	0	0.50	0.50	0.50	0	0	1	0.50	scal (6.3%)
MOV (%RDI),%R14D	1	0	0	0.33	0.33	0	0	0	0	0	0	0	0.33	1	0.33	scal (6.3%)
SUB $0x8,%RSP	1	0	0	0	0	0	0	0	0	0	0	0	0	1	0.17	N/A
LEA -0x30(%RBP),%RAX	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	N/A
MOV $0x1108,%RDI	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1	0.28	N/A
ADD %RBX,%RDI	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1	0.20	N/A
LEA -0x1c(%RBP),%RCX	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	N/A
LEA -0x28(%RBP),%R8	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	N/A
LEA -0x18(%RBP),%R9	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	N/A
MOV %R14D,%ESI	1	0	0	0	0	0	0	0	0	0	0	0	0	1	0.17	scal (6.3%)
MOV $0x22,%EDX	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1	0.20	N/A
PUSH $0x1	1	0	0	0	0	0.50	0	0	0.50	0.50	0.50	0	0	5-12	0.50	N/A
PUSH $0x1	1	0	0	0	0	0.50	0	0	0.50	0.50	0.50	0	0	5-12	0.50	N/A
PUSH %RAX	1	0	0	0	0	0.50	0	0	0.50	0.50	0.50	0	0	5-12	0.50	N/A
CALL 204e20 <@plt_start@+0x80>	2	0	0	0	0	0.50	0	0	0.50	0.50	0.50	0	0	0	1	N/A
ADD $0x20,%RSP	1	0	0	0	0	0	0	0	0	0	0	0	0	1	0.17	N/A
MOV -0x18(%RBP),%RCX	1	0	0	0.33	0.33	0	0	0	0	0	0	0	0.33	1	0.33	N/A
CMP $0x3344ffff,%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%)
MOV $0x3344ffff,%EAX	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1	0.20	N/A
CMOVL %RCX,%RAX	1	0.50	0	0	0	0	0	0.50	0	0	0	0	0	1	0.50	N/A
MOV %RAX,-0x18(%RBP)	1	0	0	0	0	0.50	0	0	0.50	0.50	0.50	0	0	1	0.50	scal (12.5%)
MOV -0x28(%RBP),%RCX	1	0	0	0.33	0.33	0	0	0	0	0	0	0	0.33	1	0.33	N/A
CMP %RAX,%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%)
JG 2038a8 <main.omp_outlined.18+0x198>	1	0.50	0	0	0	0	0	0.50	0	0	0	0	0	0	0.50	N/A
MOV %RAX,%RSI	1	0	0	0	0	0	0	0	0	0	0	0	0	1	0.17	scal (12.5%)
SUB %RCX,%RSI	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1	0.20	scal (12.5%)
INC %RSI	1	0	0	0	0	0	0	0	0	0	0	0	0	1	0.17	scal (12.5%)
MOV $0x1270,%RDX	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1	0.28	N/A
CMP $0x4,%RSI	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1	0.20	scal (12.5%)
JB 203883 <main.omp_outlined.18+0x173>	1	0.50	0	0	0	0	0	0.50	0	0	0	0	0	0	0.50	N/A
CMP $0x20,%RSI	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1	0.20	scal (12.5%)
JAE 2037ca <main.omp_outlined.18+0xba>	1	0.50	0	0	0	0	0	0.50	0	0	0	0	0	0	0.50	N/A
XOR %EDI,%EDI	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	N/A
JMP 20384a <main.omp_outlined.18+0x13a>	1	0	0	0	0	0	0	0	0	0	0	0	0	0	2.08	N/A
MOV %RSI,%RDI	1	0	0	0	0	0	0	0	0	0	0	0	0	1	0.17	N/A
AND $-0x20,%RDI	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1-2	0.20	N/A
LEA (%RBX,%RDX,1),%R8	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	N/A
LEA 0xc0(%R8,%RCX,8),%R8	1	0	1	0	0	0	0	0	0	0	0	0	0	3	1	N/A
XOR %R9D,%R9D	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	N/A
CMP %RDI,%RSI	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 2038a8 <main.omp_outlined.18+0x198>	1	0.50	0	0	0	0	0	0.50	0	0	0	0	0	0	0.50	N/A
TEST $0x1c,%SIL	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	2	0.20	N/A
JE 203880 <main.omp_outlined.18+0x170>	1	0.50	0	0	0	0	0	0.50	0	0	0	0	0	0	0.50	N/A
MOV %RSI,%R8	1	0	0	0	0	0	0	0	0	0	0	0	0	1	0.17	N/A
AND $-0x4,%R8	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1-2	0.20	N/A
LEA (%RBX,%RDX,1),%R9	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	N/A
LEA (%R9,%RCX,8),%R9	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	N/A
ADD %R8,%RCX	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1	0.20	N/A
NOPL (%RAX)	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	N/A
CMP %R8,%RSI	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1	0.20	scal (12.5%)
JNE 203883 <main.omp_outlined.18+0x173>	1	0.50	0	0	0	0	0	0.50	0	0	0	0	0	0	0.50	N/A
JMP 2038a8 <main.omp_outlined.18+0x198>	1	0	0	0	0	0	0	0	0	0	0	0	0	0	5.84	N/A
ADD %RDI,%RCX	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1	0.20	N/A
DEC %RCX	1	0	0	0	0	0	0	0	0	0	0	0	0	1	0.17	N/A
ADD %RBX,%RDX	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1	0.20	N/A
NOPL (%RAX)	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	N/A
MOV $0x1120,%RAX	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1	0.28	N/A
ADD %RAX,%RBX	1	0.20	0.20	0	0	0	0.20	0.20	0	0	0	0.20	0	1	0.20	N/A
MOV %RBX,%RDI	1	0	0	0	0	0	0	0	0	0	0	0	0	1	0.17	N/A
MOV %R14D,%ESI	1	0	0	0	0	0	0	0	0	0	0	0	0	1	0.17	scal (6.3%)
VZEROUPPER	2	0	0	0	0	0	0	0	0	0	0	0	0	0	1	vect (25.0%)
CALL 204e40 <@plt_start@+0xa0>	2	0	0	0	0	0.50	0	0	0.50	0.50	0.50	0	0	0	1	N/A
ADD $0x20,%RSP	1	0	0	0	0	0	0	0	0	0	0	0	0	1	0.17	N/A
POP %RBX	1	0	0	0.33	0.33	0	0	0	0	0	0	0	0.33	1-6	0.33	N/A
POP %R14	1	0	0	0.33	0.33	0	0	0	0	0	0	0	0.33	1-6	0.33	N/A
POP %RBP	1	0	0	0.33	0.33	0	0	0	0	0	0	0	0.33	1-6	0.33	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_outlined.18–	0.17	0.03
○Loop 6 - stream.c:292-292 - exec	0.17	0.03
○Loop 7 - stream.c:292-292 - exec	0.00	0.00
○Loop 5 - stream.c:291-292 - exec	0.00	0.00

Report Configuration

Vectorization

Details

Workaround

Execution units bottlenecks

CALL instructions

Details

Complex instructions

Details

Type of elements and instruction set

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

General properties

Front-end

Back-end

Cycles summary

Vectorization ratios

Vector efficiency ratios

Cycles and memory resources usage

Front-end bottlenecks

ASM code

Vectorization

Details

Workaround

Execution units bottlenecks

CALL instructions

Details

Complex instructions

Details

Type of elements and instruction set

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

General properties

Front-end

Back-end

Cycles summary

Vectorization ratios

Vector efficiency ratios

Cycles and memory resources usage

Front-end bottlenecks

ASM code