When using xpu backend, stable diffusion give bad result (comparing with 'cpu' backend and also opevino)

[LeptonWu]

Describe the bug

Hi, I noticed that when I am using intel-extension-for-pytorch, it seems stable diffusion just doesn't care about my full prompt and the generated picuture is quiet bad quality. I have a minimal case to show this. Here is the code to generate a picture , if I change to use cpu backend, I got a much better output. Also the output is consistent with the output if I am using openvino with their GPU backend.

#!/home/leptonwu/venv_ipex/bin/python
import time
import torch
import intel_extension_for_pytorch
from diffusers import StableDiffusionPipeline

torch.manual_seed(0)
device = "xpu"
pipe = StableDiffusionPipeline.from_single_file("realisticVisionV60B1_v51HyperVAE.safetensors").to(device)
start = time.time()
image = pipe("a man eating apple", guidance_scale=1.5,
                width=512, height=512, num_inference_steps=6)
image.images[0].save("out-ipex-%s.jpg" % device)
print(time.time() - start)

Versions

Collecting environment information...
PyTorch version: 2.3.1+cxx11.abi
PyTorch CXX11 ABI: Yes
IPEX version: 2.3.110+xpu
IPEX commit: 95c9459
Build type: Release

OS: Debian GNU/Linux 12 (bookworm) (x86_64)
GCC version: (Debian 12.2.0-14) 12.2.0
Clang version: N/A
IGC version: N/A
CMake version: version 3.25.1
Libc version: glibc-2.36

Python version: 3.11.2 (main, Aug 26 2024, 07:20:54) [GCC 12.2.0] (64-bit runtime)
Python platform: Linux-6.10.6+bpo-amd64-x86_64-with-glibc2.36
Is XPU available: True
DPCPP runtime version: N/A
MKL version: N/A
GPU models and configuration:
[0] _XpuDeviceProperties(name='Intel(R) Arc(TM) A580 Graphics', platform_name='Intel(R) Level-Zero', type='gpu', driver_version='1.3.29735', total_memory=7721MB, max_compute_units=384, gpu_eu_count=384, gpu_subslice_count=24, max_work_group_size=1024, max_num_sub_groups=128, sub_group_sizes=[8 16 32], has_fp16=1, has_fp64=0, has_atomic64=1)
Intel OpenCL ICD version: 24.22.29735.27-91422.04
Level Zero version: 1.3.29735.27-91422.04

CPU:
Architecture: x86_64
CPU op-mode(s): 32-bit, 64-bit
Address sizes: 43 bits physical, 48 bits virtual
Byte Order: Little Endian
CPU(s): 16
On-line CPU(s) list: 0-15
Vendor ID: AuthenticAMD
Model name: AMD Ryzen 7 3700X 8-Core Processor
CPU family: 23
Model: 113
Thread(s) per core: 2
Core(s) per socket: 8
Socket(s): 1
Stepping: 0
Frequency boost: enabled
CPU(s) scaling MHz: 86%
CPU max MHz: 4426.1709
CPU min MHz: 2200.0000
BogoMIPS: 7199.56
Flags: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm constant_tsc rep_good nopl xtopology nonstop_tsc cpuid extd_apicid aperfmperf rapl pni pclmulqdq monitor ssse3 fma cx16 sse4_1 sse4_2 x2apic movbe popcnt aes xsave avx f16c rdrand lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs skinit wdt tce topoext perfctr_core perfctr_nb bpext perfctr_llc mwaitx cpb cat_l3 cdp_l3 hw_pstate ssbd mba ibpb stibp vmmcall fsgsbase bmi1 avx2 smep bmi2 cqm rdt_a rdseed adx smap clflushopt clwb sha_ni xsaveopt xsavec xgetbv1 cqm_llc cqm_occup_llc cqm_mbm_total cqm_mbm_local clzero irperf xsaveerptr rdpru wbnoinvd arat npt lbrv svm_lock nrip_save tsc_scale vmcb_clean flushbyasid decodeassists pausefilter pfthreshold avic v_vmsave_vmload vgif v_spec_ctrl rdpid overflow_recov succor smca sev sev_es
Virtualization: AMD-V
L1d cache: 256 KiB (8 instances)
L1i cache: 256 KiB (8 instances)
L2 cache: 4 MiB (8 instances)
L3 cache: 32 MiB (2 instances)
NUMA node(s): 1
NUMA node0 CPU(s): 0-15
Vulnerability Gather data sampling: Not affected
Vulnerability Itlb multihit: Not affected
Vulnerability L1tf: Not affected
Vulnerability Mds: Not affected
Vulnerability Meltdown: Not affected
Vulnerability Mmio stale data: Not affected
Vulnerability Reg file data sampling: Not affected
Vulnerability Retbleed: Mitigation; untrained return thunk; SMT enabled with STIBP protection
Vulnerability Spec rstack overflow: Mitigation; Safe RET
Vulnerability Spec store bypass: Mitigation; Speculative Store Bypass disabled via prctl
Vulnerability Spectre v1: Mitigation; usercopy/swapgs barriers and __user pointer sanitization
Vulnerability Spectre v2: Mitigation; Retpolines; IBPB conditional; STIBP always-on; RSB filling; PBRSB-eIBRS Not affected; BHI Not affected
Vulnerability Srbds: Not affected
Vulnerability Tsx async abort: Not affected

Versions of relevant libraries:
[pip3] dctorch==0.1.2
[pip3] intel_extension_for_pytorch==2.3.110+xpu
[pip3] numpy==1.26.4
[pip3] open_clip_torch==2.26.1
[pip3] pytorch-lightning==1.9.4
[pip3] torch==2.3.1+cxx11.abi
[pip3] torchdiffeq==0.2.4
[pip3] torchmetrics==1.4.2
[pip3] torchsde==0.2.6
[pip3] torchvision==0.18.1+cxx11.abi
[conda] N/A

[alexsin368]

@LeptonWu this issue could be related to #529 and my team members are looking into it.