OV - exec - Function qmcplusplus::Vector<qmcplusplus::TinyVector<double, 3u>, std::allocator<qmcplusplus::TinyVector<double, 3u> > >::resize(unsigned long, qmcplusplus::TinyVector<double, 3u>)

	Function: qmcplusplus::Vector<qmcplusplus::TinyVector<double, 3u>, std::allocator<qmcplusplus::TinyV ...	Module: exec	Source: OhmmsVector.h:182-302 [...]	Coverage (incl. loops): 0.03% \| (excl. loops): 0.00%

/usr/lib/gcc/x86_64-redhat-linux/11/../../../../include/c++/11/ext/new_allocator.h: 111 - 145

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

111: 	if (__builtin_expect(__n > this->_M_max_size(), false))

112: 	  {

113: 	    // _GLIBCXX_RESOLVE_LIB_DEFECTS

114: 	    // 3190. allocator::allocate sometimes returns too little storage

115: 	    if (__n > (std::size_t(-1) / sizeof(_Tp)))

116: 	      std::__throw_bad_array_new_length();

117: 	    std::__throw_bad_alloc();

[...]

127: 	return static_cast<_Tp*>(::operator new(__n * sizeof(_Tp)));

[...]

145: 	::operator delete(__p

/usr/lib/gcc/x86_64-redhat-linux/11/../../../../include/c++/11/bits/stl_algobase.h: 911 - 912

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

911:       for (; __first != __last; ++__first)

912: 	*__first = __value;

/home/eoseret/qaas_runs_ZEN5/173-938-0042/intel/miniqmc/build/miniqmc/src/Numerics/OhmmsPETE/OhmmsVector.h: 182 - 302

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

182:   {

183:     static_assert(std::is_same<value_type, typename Alloc::value_type>::value,

184:                   "Vector and Alloc data types must agree!");

185:     if (nLocal > nAllocated)

186:       throw std::runtime_error("Resize not allowed on Vector constructed by initialized memory.");

187:

188:     if (n > nAllocated)

[...]

195:       if (n > nLocal)

196:         qmc_allocator_traits<Alloc>::fill_n(X + nLocal, n - nLocal, val);

197:       nLocal = n;

198:     }

199:     return;

[...]

296:     if (nAllocated)

297:     {

298:       mAllocator.deallocate(X, nAllocated);

299:     }

300:     X          = mAllocator.allocate(n);

301:     nLocal     = n;

302:     nAllocated = n;

0x2356b0 PUSH	%RBP

0x2356b1 MOV	%RSP,%RBP

0x2356b4 PUSH	%R15

0x2356b6 PUSH	%R14

0x2356b8 PUSH	%R12

0x2356ba PUSH	%RBX

0x2356bb MOV	0x8(%RDI),%RAX

0x2356bf MOV	0x10(%RDI),%RCX

0x2356c3 CMP	%RCX,%RAX

0x2356c6 JA	2357a4

0x2356cc LEA	0x10(%RBP),%R12

0x2356d0 MOV	%RSI,%RBX

0x2356d3 MOV	%RDI,%R14

0x2356d6 CMP	%RSI,%RCX

0x2356d9 JAE	235740

0x2356db TEST	%RCX,%RCX

0x2356de JE	2356e9

0x2356e0 MOV	0x18(%R14),%RDI

0x2356e4 CALL	2dc270 <@plt_start@+0x30>

0x2356e9 MOV	$0x555555555555556,%RAX

0x2356f3 CMP	%RAX,%RBX

0x2356f6 JAE	23578b

0x2356fc LEA	(,%RBX,8),%RAX

0x235704 LEA	(%RAX,%RAX,2),%R15

0x235708 MOV	%R15,%RDI

0x23570b CALL	2dc250 <@plt_start@+0x10>

0x235710 MOV	%RAX,0x18(%R14)

0x235714 MOV	%RBX,0x8(%R14)

0x235718 XOR	%ECX,%ECX

0x23571a MOV	%RBX,0x10(%R14)

0x23571e XCHG	%AX,%AX

(212) 0x235720 VMOVUPS	(%R12),%XMM0

(212) 0x235726 MOV	0x10(%R12),%RDX

(212) 0x23572b MOV	%RDX,0x10(%RAX,%RCX,1)

(212) 0x235730 VMOVUPS	%XMM0,(%RAX,%RCX,1)

(212) 0x235735 ADD	$0x18,%RCX

(212) 0x235739 CMP	%RCX,%R15

(212) 0x23573c JNE	235720

0x23573e JMP	235782

0x235740 CMP	%RBX,%RAX

0x235743 JAE	23577e

0x235745 MOV	0x18(%R14),%RCX

0x235749 LEA	(,%RBX,8),%RDX

0x235751 SAL	$0x3,%RAX

0x235755 LEA	(%RAX,%RAX,2),%RAX

0x235759 LEA	(%RDX,%RDX,2),%RDX

0x23575d NOPL	(%RAX)

(211) 0x235760 MOV	0x10(%R12),%RSI

(211) 0x235765 MOV	%RSI,0x10(%RCX,%RAX,1)

(211) 0x23576a VMOVUPS	(%R12),%XMM0

(211) 0x235770 VMOVUPS	%XMM0,(%RCX,%RAX,1)

(211) 0x235775 ADD	$0x18,%RAX

(211) 0x235779 CMP	%RAX,%RDX

(211) 0x23577c JNE	235760

0x23577e MOV	%RBX,0x8(%R14)

0x235782 POP	%RBX

0x235783 POP	%R12

0x235785 POP	%R14

0x235787 POP	%R15

0x235789 POP	%RBP

0x23578a RET

0x23578b MOV	$0xaaaaaaaaaaaaaab,%RAX

0x235795 CMP	%RAX,%RBX

0x235798 JB	23579f

0x23579a CALL	2dc440 <@plt_start@+0x200>

0x23579f CALL	2dc5c0 <@plt_start@+0x380>

0x2357a4 MOV	$0x10,%EDI

0x2357a9 CALL	2dc470 <@plt_start@+0x230>

0x2357ae MOV	%RAX,%RBX

0x2357b1 LEA	-0x2f224(%RIP),%RSI

0x2357b8 MOV	%RAX,%RDI

0x2357bb CALL	2dc480 <@plt_start@+0x240>

0x2357c0 MOV	0xac711(%RIP),%RSI

0x2357c7 MOV	0xac712(%RIP),%RDX

0x2357ce MOV	%RBX,%RDI

0x2357d1 CALL	2dc490 <@plt_start@+0x250>

0x2357d6 MOV	%RBX,%RDI

0x2357d9 MOV	%RAX,%R14

0x2357dc CALL	2dc4a0 <@plt_start@+0x260>

0x2357e1 MOV	%R14,%RDI

0x2357e4 CALL	2dc290 <@plt_start@+0x50>

0x2357e9 INT	$0x3

0x2357ea INT	$0x3

0x2357eb INT	$0x3

0x2357ec INT	$0x3

0x2357ed INT	$0x3

0x2357ee INT	$0x3

0x2357ef INT	$0x3

Coverage (%)	Name	Source Location	Module
►49.96+	miniqmcreference::DiracDetermi[...]	OhmmsMatrix.h:104	exec
○	miniqmcreference::DiracDetermi[...]	DiracDeterminantRef.cpp:48	exec
○	qmcplusplus::build_WaveFunctio[...]	WaveFunction.cpp:80	exec
○	main.omp_outlined	miniqmc.cpp:390	exec
○	__kmp_invoke_microtask		libomp.so
○	__kmp_invoke_task_func		libomp.so
○	__kmp_launch_thread		libomp.so
○	__kmp_launch_worker(void*)		libomp.so
○	start_thread		libc.so.6
○	__GI___clone3		libc.so.6
►46.94+	miniqmcreference::DiracDetermi[...]	OhmmsMatrix.h:104	exec
○	miniqmcreference::DiracDetermi[...]	DiracDeterminantRef.cpp:48	exec
○	qmcplusplus::build_WaveFunctio[...]	WaveFunction.cpp:81	exec
○	main.omp_outlined	miniqmc.cpp:390	exec
○	__kmp_invoke_microtask		libomp.so
○	__kmp_invoke_task_func		libomp.so
○	__kmp_launch_thread		libomp.so
○	__kmp_launch_worker(void*)		libomp.so
○	start_thread		libc.so.6
○	__GI___clone3		libc.so.6
►1.58+	miniqmcreference::DiracDetermi[...]	OhmmsMatrix.h:104	exec
○	miniqmcreference::DiracDetermi[...]	DiracDeterminantRef.cpp:48	exec
○	qmcplusplus::build_WaveFunctio[...]	WaveFunction.cpp:81	exec
○	main.omp_outlined	miniqmc.cpp:390	exec
○	__kmp_invoke_microtask		libomp.so
○	__kmp_invoke_task_func		libomp.so
○	__kmp_fork_call		libomp.so
○	__kmpc_fork_call		libomp.so
○	main	miniqmc.cpp:378	exec
○	__libc_start_call_main		libc.so.6
►1.48+	miniqmcreference::DiracDetermi[...]	OhmmsMatrix.h:104	exec
○	miniqmcreference::DiracDetermi[...]	DiracDeterminantRef.cpp:48	exec
○	qmcplusplus::build_WaveFunctio[...]	WaveFunction.cpp:80	exec
○	main.omp_outlined	miniqmc.cpp:390	exec
○	__kmp_invoke_microtask		libomp.so
○	__kmp_invoke_task_func		libomp.so
○	__kmp_fork_call		libomp.so
○	__kmpc_fork_call		libomp.so
○	main	miniqmc.cpp:378	exec
○	__libc_start_call_main		libc.so.6

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_4

Source file and lines	OhmmsVector.h:182-302
Module	exec

The function is defined in:

/usr/lib/gcc/x86_64-redhat-linux/11/../../../../include/c++/11/ext/new_allocator.h:111-117,127,145
/usr/lib/gcc/x86_64-redhat-linux/11/../../../../include/c++/11/bits/stl_algobase.h:911-912
/home/eoseret/qaas_runs_ZEN5/173-938-0042/intel/miniqmc/build/miniqmc/src/Numerics/OhmmsPETE/OhmmsVector.h:182-188,195-199,296-302

Warnings:
Ignoring paths for analysis

gain
potential
hint
expert

Vectorization

Your function is not vectorized. Only 12% 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 9.25 to 0.67 cycles (13.77x speedup).

Details

All SSE/AVX instructions are used in scalar version (process only one data element in vector registers). Since your execution units are vector units, only a vectorized function can use their full power.

Workaround

Try another compiler or update/tune your current one
Make array accesses unit-stride:
- If your function streams arrays of structures (AoS), try to use structures of arrays instead (SoA): for(i) a[i].x = b[i].x; (slow, non stride 1) => for(i) a.x[i] = b.x[i]; (fast, stride 1)

Execution units bottlenecks

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

No data for this section

CALL instructions

Detected function call instructions.

Details

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

@plt_start@: 1 occurrences►
- /usr/lib/gcc/x86_64-redhat-linux/11/../../../../include/c++/11/ext/new_allocator.h:127
unknown: 8 occurrences►
- /usr/lib/gcc/x86_64-redhat-linux/11/../../../../include/c++/11/ext/new_allocator.h:145
- /usr/lib/gcc/x86_64-redhat-linux/11/../../../../include/c++/11/ext/new_allocator.h:116
- /usr/lib/gcc/x86_64-redhat-linux/11/../../../../include/c++/11/ext/new_allocator.h:117
- /home/eoseret/qaas_runs_ZEN5/173-938-0042/intel/miniqmc/build/miniqmc/src/Numerics/OhmmsPETE/OhmmsVector.h:186
- /home/eoseret/qaas_runs_ZEN5/173-938-0042/intel/miniqmc/build/miniqmc/src/Numerics/OhmmsPETE/OhmmsVector.h:186
- /home/eoseret/qaas_runs_ZEN5/173-938-0042/intel/miniqmc/build/miniqmc/src/Numerics/OhmmsPETE/OhmmsVector.h:186
- /home/eoseret/qaas_runs_ZEN5/173-938-0042/intel/miniqmc/build/miniqmc/src/Numerics/OhmmsPETE/OhmmsVector.h:186
- /home/eoseret/qaas_runs_ZEN5/173-938-0042/intel/miniqmc/build/miniqmc/src/Numerics/OhmmsPETE/OhmmsVector.h:186

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 48 bytes. The binary function is storing 32 bytes.

General properties

nb instructions	74
nb uops	74
loop length	260
used x86 registers	11
used mmx registers	0
used xmm registers	0
used ymm registers	0
used zmm registers	0
nb stack references	1

Front-end

MACRO FUSION NOT POSSIBLE FIT IN UOP CACHE

micro-operation queue	9.25 cycles
front end	9.25 cycles

Back-end

	P0	P1	P2	P3	P4	P5	P6	P7	P8	P9	P10	P11	P12	P13	P14	P15
uops	5.33	5.33	5.33	6.00	6.00	6.00	4.75	4.75	4.75	4.75	0.00	0.00	0.00	0.00	0.00	0.00
cycles	5.33	5.33	5.33	6.00	6.00	6.00	4.75	4.75	4.75	4.75	0.00	0.00	0.00	0.00	0.00	0.00

Execution ports to units layout:

P0: ALU
P1: ALU
P2: ALU
P3: ALU, BRU
P4: ALU, BRU
P5: ALU, BRU
P6 (512 bits): store address, load
P7 (512 bits): store address, load
P8 (512 bits): store address, load
P9 (512 bits): store address, load
P10 (512 bits): VPU, DIV/SQRT
P11 (512 bits): VPU, DIV/SQRT
P12 (512 bits): VPU
P13 (512 bits): VPU
P14 (512 bits): FP store data
P15 (512 bits): FP store data

Cycles executing div or sqrt instructions

Cycles summary

Front-end	9.25
Dispatch	6.00
Overall L1	9.25

Vectorization ratios

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)
div/sqrt	NA (no div/sqrt vectorizable/vectorized instructions)
other	0%

Vector efficiency ratios

all	12%
load	12%
store	12%
mul	NA (no mul vectorizable/vectorized instructions)
add-sub	NA (no add-sub vectorizable/vectorized instructions)
fma	NA (no fma vectorizable/vectorized instructions)
div/sqrt	NA (no div/sqrt vectorizable/vectorized instructions)
other	11%

Cycles and memory resources usage

Assuming all data fit into the L1 cache, each call to the function takes 9.25 cycles. At this rate:

2% of peak load performance is reached (5.19 out of 256.00 bytes loaded per cycle (GB/s @ 1GHz))
2% of peak store performance is reached (3.46 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 9.25 to 6.00 cycles (1.54x speedup).

ASM code

In the binary file, the address of the function is: 2356b0

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 %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
MOV 0x8(%RDI),%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 0x10(%RDI),%RCX	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%)
CMP %RCX,%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	scal (12.5%)
JA 2357a4 <_ZN11qmcplusplus6VectorINS_10TinyVectorIdLj3EEESaIS2_EE6resizeEmS2_+0xf4>	1	0	0	0	0.33	0.33	0.33	0	0	0	0	0	0	0	0	0	0	1	0.50-1	N/A
LEA 0x10(%RBP),%R12	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	0	1	0.25	N/A
MOV %RSI,%RBX	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	N/A
MOV %RDI,%R14	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	N/A
CMP %RSI,%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	scal (12.5%)
JAE 235740 <_ZN11qmcplusplus6VectorINS_10TinyVectorIdLj3EEESaIS2_EE6resizeEmS2_+0x90>	1	0	0	0	0.33	0.33	0.33	0	0	0	0	0	0	0	0	0	0	1	0.50-1	N/A
TEST %RCX,%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	scal (12.5%)
JE 2356e9 <_ZN11qmcplusplus6VectorINS_10TinyVectorIdLj3EEESaIS2_EE6resizeEmS2_+0x39>	1	0	0	0	0.33	0.33	0.33	0	0	0	0	0	0	0	0	0	0	1	0.50-1	N/A
MOV 0x18(%R14),%RDI	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
CALL 2dc270 <@plt_start@+0x30>	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 $0x555555555555556,%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
CMP %RAX,%RBX	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 (12.5%)
JAE 23578b <_ZN11qmcplusplus6VectorINS_10TinyVectorIdLj3EEESaIS2_EE6resizeEmS2_+0xdb>	1	0	0	0	0.33	0.33	0.33	0	0	0	0	0	0	0	0	0	0	1	0.50-1	N/A
LEA (,%RBX,8),%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	0.25	N/A
LEA (%RAX,%RAX,2),%R15	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	0	1	0.25	N/A
MOV %R15,%RDI	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	N/A
CALL 2dc250 <@plt_start@+0x10>	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 %RAX,0x18(%R14)	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 %RBX,0x8(%R14)	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%)
XOR %ECX,%ECX	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0.25	scal (6.3%)
MOV %RBX,0x10(%R14)	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%)
XCHG %AX,%AX	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0.09	N/A
JMP 235782 <_ZN11qmcplusplus6VectorINS_10TinyVectorIdLj3EEESaIS2_EE6resizeEmS2_+0xd2>	1	0	0	0	0.33	0.33	0.33	0	0	0	0	0	0	0	0	0	0	0	1	N/A
CMP %RBX,%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	scal (12.5%)
JAE 23577e <_ZN11qmcplusplus6VectorINS_10TinyVectorIdLj3EEESaIS2_EE6resizeEmS2_+0xce>	1	0	0	0	0.33	0.33	0.33	0	0	0	0	0	0	0	0	0	0	1	0.50-1	N/A
MOV 0x18(%R14),%RCX	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%)
LEA (,%RBX,8),%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	0.25	N/A
SAL $0x3,%RAX	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
LEA (%RAX,%RAX,2),%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	0.25	N/A
LEA (%RDX,%RDX,2),%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	0.25	N/A
NOPL (%RAX)	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0.09	N/A
MOV %RBX,0x8(%R14)	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%)
POP %RBX	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.33	N/A
POP %R12	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.33	N/A
POP %R14	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.33	N/A
POP %R15	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.33	N/A
POP %RBP	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.33	N/A
RET	1	0	0	0	0.33	0.33	0.33	0	0	0	0	0	0	0	0	0	0	1	0.50	N/A
MOV $0xaaaaaaaaaaaaaab,%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
CMP %RAX,%RBX	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
JB 23579f <_ZN11qmcplusplus6VectorINS_10TinyVectorIdLj3EEESaIS2_EE6resizeEmS2_+0xef>	1	0	0	0	0.33	0.33	0.33	0	0	0	0	0	0	0	0	0	0	1	0.50-1	N/A
CALL 2dc440 <@plt_start@+0x200>	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
CALL 2dc5c0 <@plt_start@+0x380>	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 $0x10,%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 2dc470 <@plt_start@+0x230>	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 %RAX,%RBX	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	N/A
LEA -0x2f224(%RIP),%RSI	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	0	1	0.25	N/A
MOV %RAX,%RDI	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	N/A
CALL 2dc480 <@plt_start@+0x240>	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 0xac711(%RIP),%RSI	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 0xac712(%RIP),%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	N/A
MOV %RBX,%RDI	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	N/A
CALL 2dc490 <@plt_start@+0x250>	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,%RDI	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	N/A
MOV %RAX,%R14	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	N/A
CALL 2dc4a0 <@plt_start@+0x260>	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 %R14,%RDI	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	N/A
CALL 2dc290 <@plt_start@+0x50>	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
INT $0x3																				N/A
INT $0x3																				N/A
INT $0x3																				N/A
INT $0x3																				N/A
INT $0x3																				N/A
INT $0x3																				N/A
INT $0x3																				N/A

The code analyzed by CQA in that panel excludes loops and represents 0.00% of application time for run aocc_4

Source file and lines	OhmmsVector.h:182-302
Module	exec

The function is defined in:

/usr/lib/gcc/x86_64-redhat-linux/11/../../../../include/c++/11/ext/new_allocator.h:111-117,127,145
/usr/lib/gcc/x86_64-redhat-linux/11/../../../../include/c++/11/bits/stl_algobase.h:911-912
/home/eoseret/qaas_runs_ZEN5/173-938-0042/intel/miniqmc/build/miniqmc/src/Numerics/OhmmsPETE/OhmmsVector.h:182-188,195-199,296-302

Warnings:
Ignoring paths for analysis

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

@plt_start@: 1 occurrences►
- /usr/lib/gcc/x86_64-redhat-linux/11/../../../../include/c++/11/ext/new_allocator.h:127
unknown: 8 occurrences►
- /usr/lib/gcc/x86_64-redhat-linux/11/../../../../include/c++/11/ext/new_allocator.h:145
- /usr/lib/gcc/x86_64-redhat-linux/11/../../../../include/c++/11/ext/new_allocator.h:116
- /usr/lib/gcc/x86_64-redhat-linux/11/../../../../include/c++/11/ext/new_allocator.h:117
- /home/eoseret/qaas_runs_ZEN5/173-938-0042/intel/miniqmc/build/miniqmc/src/Numerics/OhmmsPETE/OhmmsVector.h:186
- /home/eoseret/qaas_runs_ZEN5/173-938-0042/intel/miniqmc/build/miniqmc/src/Numerics/OhmmsPETE/OhmmsVector.h:186
- /home/eoseret/qaas_runs_ZEN5/173-938-0042/intel/miniqmc/build/miniqmc/src/Numerics/OhmmsPETE/OhmmsVector.h:186
- /home/eoseret/qaas_runs_ZEN5/173-938-0042/intel/miniqmc/build/miniqmc/src/Numerics/OhmmsPETE/OhmmsVector.h:186
- /home/eoseret/qaas_runs_ZEN5/173-938-0042/intel/miniqmc/build/miniqmc/src/Numerics/OhmmsPETE/OhmmsVector.h:186

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 48 bytes. The binary function is storing 32 bytes.

General properties

nb instructions	74
nb uops	74
loop length	260
used x86 registers	11
used mmx registers	0
used xmm registers	0
used ymm registers	0
used zmm registers	0
nb stack references	1

Front-end

MACRO FUSION NOT POSSIBLE FIT IN UOP CACHE

micro-operation queue	9.25 cycles
front end	9.25 cycles

Back-end

	P0	P1	P2	P3	P4	P5	P6	P7	P8	P9	P10	P11	P12	P13	P14	P15
uops	5.33	5.33	5.33	6.00	6.00	6.00	4.75	4.75	4.75	4.75	0.00	0.00	0.00	0.00	0.00	0.00
cycles	5.33	5.33	5.33	6.00	6.00	6.00	4.75	4.75	4.75	4.75	0.00	0.00	0.00	0.00	0.00	0.00

Execution ports to units layout:

P0: ALU
P1: ALU
P2: ALU
P3: ALU, BRU
P4: ALU, BRU
P5: ALU, BRU
P6 (512 bits): store address, load
P7 (512 bits): store address, load
P8 (512 bits): store address, load
P9 (512 bits): store address, load
P10 (512 bits): VPU, DIV/SQRT
P11 (512 bits): VPU, DIV/SQRT
P12 (512 bits): VPU
P13 (512 bits): VPU
P14 (512 bits): FP store data
P15 (512 bits): FP store data

Cycles executing div or sqrt instructions

Cycles summary

Front-end	9.25
Dispatch	6.00
Overall L1	9.25

Vectorization ratios

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)
div/sqrt	NA (no div/sqrt vectorizable/vectorized instructions)
other	0%

Vector efficiency ratios

all	12%
load	12%
store	12%
mul	NA (no mul vectorizable/vectorized instructions)
add-sub	NA (no add-sub vectorizable/vectorized instructions)
fma	NA (no fma vectorizable/vectorized instructions)
div/sqrt	NA (no div/sqrt vectorizable/vectorized instructions)
other	11%

Cycles and memory resources usage

Assuming all data fit into the L1 cache, each call to the function takes 9.25 cycles. At this rate:

2% of peak load performance is reached (5.19 out of 256.00 bytes loaded per cycle (GB/s @ 1GHz))
2% of peak store performance is reached (3.46 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: 2356b0

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 %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
MOV 0x8(%RDI),%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 0x10(%RDI),%RCX	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%)
CMP %RCX,%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	scal (12.5%)
JA 2357a4 <_ZN11qmcplusplus6VectorINS_10TinyVectorIdLj3EEESaIS2_EE6resizeEmS2_+0xf4>	1	0	0	0	0.33	0.33	0.33	0	0	0	0	0	0	0	0	0	0	1	0.50-1	N/A
LEA 0x10(%RBP),%R12	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	0	1	0.25	N/A
MOV %RSI,%RBX	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	N/A
MOV %RDI,%R14	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	N/A
CMP %RSI,%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	scal (12.5%)
JAE 235740 <_ZN11qmcplusplus6VectorINS_10TinyVectorIdLj3EEESaIS2_EE6resizeEmS2_+0x90>	1	0	0	0	0.33	0.33	0.33	0	0	0	0	0	0	0	0	0	0	1	0.50-1	N/A
TEST %RCX,%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	scal (12.5%)
JE 2356e9 <_ZN11qmcplusplus6VectorINS_10TinyVectorIdLj3EEESaIS2_EE6resizeEmS2_+0x39>	1	0	0	0	0.33	0.33	0.33	0	0	0	0	0	0	0	0	0	0	1	0.50-1	N/A
MOV 0x18(%R14),%RDI	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
CALL 2dc270 <@plt_start@+0x30>	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 $0x555555555555556,%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
CMP %RAX,%RBX	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 (12.5%)
JAE 23578b <_ZN11qmcplusplus6VectorINS_10TinyVectorIdLj3EEESaIS2_EE6resizeEmS2_+0xdb>	1	0	0	0	0.33	0.33	0.33	0	0	0	0	0	0	0	0	0	0	1	0.50-1	N/A
LEA (,%RBX,8),%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	0.25	N/A
LEA (%RAX,%RAX,2),%R15	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	0	1	0.25	N/A
MOV %R15,%RDI	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	N/A
CALL 2dc250 <@plt_start@+0x10>	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 %RAX,0x18(%R14)	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 %RBX,0x8(%R14)	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%)
XOR %ECX,%ECX	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0.25	scal (6.3%)
MOV %RBX,0x10(%R14)	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%)
XCHG %AX,%AX	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0.09	N/A
JMP 235782 <_ZN11qmcplusplus6VectorINS_10TinyVectorIdLj3EEESaIS2_EE6resizeEmS2_+0xd2>	1	0	0	0	0.33	0.33	0.33	0	0	0	0	0	0	0	0	0	0	0	1	N/A
CMP %RBX,%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	scal (12.5%)
JAE 23577e <_ZN11qmcplusplus6VectorINS_10TinyVectorIdLj3EEESaIS2_EE6resizeEmS2_+0xce>	1	0	0	0	0.33	0.33	0.33	0	0	0	0	0	0	0	0	0	0	1	0.50-1	N/A
MOV 0x18(%R14),%RCX	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%)
LEA (,%RBX,8),%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	0.25	N/A
SAL $0x3,%RAX	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
LEA (%RAX,%RAX,2),%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	0.25	N/A
LEA (%RDX,%RDX,2),%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	0.25	N/A
NOPL (%RAX)	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0.09	N/A
MOV %RBX,0x8(%R14)	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%)
POP %RBX	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.33	N/A
POP %R12	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.33	N/A
POP %R14	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.33	N/A
POP %R15	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.33	N/A
POP %RBP	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0.33	N/A
RET	1	0	0	0	0.33	0.33	0.33	0	0	0	0	0	0	0	0	0	0	1	0.50	N/A
MOV $0xaaaaaaaaaaaaaab,%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
CMP %RAX,%RBX	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
JB 23579f <_ZN11qmcplusplus6VectorINS_10TinyVectorIdLj3EEESaIS2_EE6resizeEmS2_+0xef>	1	0	0	0	0.33	0.33	0.33	0	0	0	0	0	0	0	0	0	0	1	0.50-1	N/A
CALL 2dc440 <@plt_start@+0x200>	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
CALL 2dc5c0 <@plt_start@+0x380>	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 $0x10,%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 2dc470 <@plt_start@+0x230>	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 %RAX,%RBX	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	N/A
LEA -0x2f224(%RIP),%RSI	1	0.17	0.17	0.17	0.17	0.17	0.17	0	0	0	0	0	0	0	0	0	0	1	0.25	N/A
MOV %RAX,%RDI	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	N/A
CALL 2dc480 <@plt_start@+0x240>	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 0xac711(%RIP),%RSI	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 0xac712(%RIP),%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	N/A
MOV %RBX,%RDI	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	N/A
CALL 2dc490 <@plt_start@+0x250>	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,%RDI	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	N/A
MOV %RAX,%R14	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	N/A
CALL 2dc4a0 <@plt_start@+0x260>	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 %R14,%RDI	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0.17	N/A
CALL 2dc290 <@plt_start@+0x50>	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
INT $0x3																				N/A
INT $0x3																				N/A
INT $0x3																				N/A
INT $0x3																				N/A
INT $0x3																				N/A
INT $0x3																				N/A
INT $0x3																				N/A

Name	Coverage (%)	Time (s)
▼qmcplusplus::Vector, std::allocator > >::resize(unsigned long, qmcplusplus::TinyVector)–	0.03	0.05
○Loop 212 - stl_algobase.h:911-912 - exec	0.03	0.05
○Loop 211 - stl_algobase.h:911-912 - exec	0.00	0.00

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Vectorization

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Execution units bottlenecks

CALL 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