Repository: pytorch
Issue: [CPU][Operator] one channel_shuffle test of the operator benchmark has a Performance fluctuation issue
Labels: needs reproduction,module: performance,module: nn,triaged

### 🐛 Describe the bug

I conducted the operator benchmark and found one channel_shuffle test of the operator benchmark has a performance fluctuation issue. The test is benchmarkchannel_shuffle_batch_size4_channels_per_group64_height64_width64_groups4_channel_lastTrue.

Set up the test environment according to the [Operator Micro-benchmarks README](https://github.com/pytorch/pytorch/tree/main/benchmarks/operator_benchmark) and conducted the following commands 10 times.

```
taskset -c 0-23 python -m pt.channel_shuffle_test --test-name  channel_shuffle_batch_size4_channels_per_group64_height64_width64_groups4_channel_lastTrue
```
Here are the test results from my environment. We can clearly observe significant performance fluctuations in the test logs for rounds 3 and 9.

```
channel_shuffle_test_round_10.log:Forward Execution Time (us) : 120.766
channel_shuffle_test_round_10.log:Forward Execution Time (us) : 119.556
channel_shuffle_test_round_1.log:Forward Execution Time (us) : 120.853
channel_shuffle_test_round_1.log:Forward Execution Time (us) : 119.538
channel_shuffle_test_round_2.log:Forward Execution Time (us) : 117.764
channel_shuffle_test_round_2.log:Forward Execution Time (us) : 117.233
channel_shuffle_test_round_3.log:Forward Execution Time (us) : 789.170
channel_shuffle_test_round_3.log:Forward Execution Time (us) : 118.370
channel_shuffle_test_round_4.log:Forward Execution Time (us) : 118.316
channel_shuffle_test_round_4.log:Forward Execution Time (us) : 117.791
channel_shuffle_test_round_5.log:Forward Execution Time (us) : 118.098
channel_shuffle_test_round_5.log:Forward Execution Time (us) : 120.020
channel_shuffle_test_round_6.log:Forward Execution Time (us) : 118.721
channel_shuffle_test_round_6.log:Forward Execution Time (us) : 117.861
channel_shuffle_test_round_7.log:Forward Execution Time (us) : 119.729
channel_shuffle_test_round_7.log:Forward Execution Time (us) : 119.001
channel_shuffle_test_round_8.log:Forward Execution Time (us) : 119.005
channel_shuffle_test_round_8.log:Forward Execution Time (us) : 117.391
channel_shuffle_test_round_9.log:Forward Execution Time (us) : 858.333
channel_shuffle_test_round_9.log:Forward Execution Time (us) : 117.732

```


### Versions

Versions
```
PyTorch version: 2.6.0.dev20241224+cpu
Is debug build: False
CUDA used to build PyTorch: None
ROCM used to build PyTorch: N/A

OS: Ubuntu 20.04.6 LTS (x86_64)
GCC version: (Ubuntu 9.4.0-1ubuntu1~20.04.2) 9.4.0
Clang version: Could not collect
CMake version: version 3.16.3
Libc version: glibc-2.31

Python version: 3.9.21 | packaged by conda-forge | (main, Dec  5 2024, 13:51:40)  [GCC 13.3.0] (64-bit runtime)
Python platform: Linux-5.4.0-192-generic-x86_64-with-glibc2.31
Is CUDA available: False
CUDA runtime version: No CUDA
CUDA_MODULE_LOADING set to: N/A
GPU models and configuration: No CUDA
Nvidia driver version: No CUDA
cuDNN version: No CUDA
HIP runtime version: N/A
MIOpen runtime version: N/A
Is XNNPACK available: True

CPU:
Architecture:                       x86_64
CPU op-mode(s):                     32-bit, 64-bit
Byte Order:                         Little Endian
Address sizes:                      46 bits physical, 57 bits virtual
CPU(s):                             112
On-line CPU(s) list:                0-111
Thread(s) per core:                 2
Core(s) per socket:                 28
Socket(s):                          2
NUMA node(s):                       2
Vendor ID:                          GenuineIntel
CPU family:                         6
Model:                              106
Model name:                         Intel(R) Xeon(R) Gold 6348 CPU @ 2.60GHz
Stepping:                           6
CPU MHz:                            3400.001
CPU max MHz:                        3500.0000
CPU min MHz:                        800.0000
BogoMIPS:                           5200.00
Virtualization:                     VT-x
L1d cache:                          2.6 MiB
L1i cache:                          1.8 MiB
L2 cache:                           70 MiB
L3 cache:                           84 MiB
NUMA node0 CPU(s):                  0-27,56-83
NUMA node1 CPU(s):                  28-55,84-111
Vulnerability Gather data sampling: Mitigation; Microcode
Vulnerability Itlb multihit:        Not affected
Vulnerability L1tf:                 Not affected
Vulnerability Mds:                  Not affected
Vulnerability Meltdown:             Not affected
Vulnerability Mmio stale data:      Mitigation; Clear CPU buffers; SMT vulnerable
Vulnerability Retbleed:             Not affected
Vulnerability Spec store bypass:    Mitigation; Speculative Store Bypass disabled via prctl and seccomp
Vulnerability Spectre v1:           Mitigation; usercopy/swapgs barriers and __user pointer sanitization
Vulnerability Spectre v2:           Mitigation; Enhanced / Automatic IBRS; IBPB conditional; RSB filling; PBRSB-eIBRS SW sequence; BHI Vulnerable, KVM SW loop
Vulnerability Srbds:                Not affected
Vulnerability Tsx async abort:      Not affected
Flags:                              fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc art arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc cpuid aperfmperf pni pclmulqdq dtes64 ds_cpl vmx smx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid dca sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm 3dnowprefetch cpuid_fault epb cat_l3 invpcid_single ssbd mba ibrs ibpb stibp ibrs_enhanced tpr_shadow vnmi flexpriority ept vpid ept_ad fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid cqm rdt_a avx512f avx512dq rdseed adx smap avx512ifma clflushopt clwb intel_pt avx512cd sha_ni avx512bw avx512vl xsaveopt xsavec xgetbv1 xsaves cqm_llc cqm_occup_llc cqm_mbm_total cqm_mbm_local wbnoinvd dtherm ida arat pln pts hwp hwp_act_window hwp_epp hwp_pkg_req avx512vbmi umip pku ospke avx512_vbmi2 gfni vaes vpclmulqdq avx512_vnni avx512_bitalg tme avx512_vpopcntdq rdpid md_clear pconfig flush_l1d arch_capabilities

Versions of relevant libraries:
[pip3] numpy==1.26.4
[pip3] torch==2.6.0.dev20241224+cpu
[pip3] torchaudio==2.6.0.dev20241224+cpu
[pip3] torchvision==0.22.0.dev20241224+cpu
[conda] numpy                     1.26.4                   pypi_0    pypi
[conda] torch                     2.6.0.dev20241224+cpu          pypi_0    pypi
[conda] torchaudio                2.6.0.dev20241224+cpu          pypi_0    pypi
[conda] torchvision               0.22.0.dev20241224+cpu          pypi_0    pypi

```

cc @msaroufim @albanD @mruberry @jbschlosser @walterddr @mikaylagawarecki