Intel^® VTune^™ Profiler 2024.0.0

Elapsed Time: 36.499s
- GPU Time: 27.634s

Display controller: Intel Corporation Device 0x0bda Device Group:

XVE Array Stalled/Idle:
88.1% of Elapsed time with GPU busy
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The percentage of time when the XVEs were stalled or idle is high, which has a negative impact on compute-bound applications.
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- This section shows the XVE metrics per stack and per adapter for all the devices in this group.:
  GPU Stack GPU Adapter XVE Array Active(%) XVE Array Stalled(%) XVE Array Idle(%)
  0 GPU 1 36.1% 39.5% 24.4%
  0 GPU 3 0.0% 0.0% 100.0%
  0 GPU 0 0.0% 0.0% 100.0%
  0 GPU 2 0.0% 0.0% 100.0%

GPU L3 Bandwidth Bound: 1.3% of peak value

Occupancy: 22.1% of peak value

Several factors including shared local memory, use of memory barriers, and inefficient work scheduling can cause a low value of the occupancy metric.

This section shows the computing tasks with low occupancy metric for all the devices in this group.:

Computing Task	Total Time	Occupancy(%)	SIMD Utilization(%)
iso3dfd(sycl::_V1::queue&, float, float, float, float, unsigned long, unsigned long, unsigned long, unsigned long)::{lambda(sycl::_V1::handler&)#1}::operator()(sycl::_V1::handler&) const::{lambda(sycl::_V1::id<(int)3>)#1}	14.744s	23.7% of peak value	0.0%

Collection and Platform Info:
- Application Command Line: ./build/src/2_GPU_basic "1024" "1024" "1024" "100"
- Operating System: 5.15.0-100-generic DISTRIB_ID=Ubuntu DISTRIB_RELEASE=22.04 DISTRIB_CODENAME=jammy DISTRIB_DESCRIPTION="Ubuntu 22.04.4 LTS"
- Computer Name: idc-beta-batch-pvc-node-06
- Result Size: 297.4 MB
- Collection start time: 23:44:22 14/03/2024 UTC
- Collection stop time: 23:44:58 14/03/2024 UTC
- Collector Type: Event-based sampling driver,User-mode sampling and tracing
- CPU:
  - Name: Intel(R) Xeon(R) Processor code named Sapphirerapids
  - Frequency: 2.000 GHz
  - Logical CPU Count: 224
  - LLC size: 110.1 MB
- GPU:
  - GPU 0: 0:41:0.0 : Display controller: Intel Corporation Device 0x0bda:
    BDF: 0:41:0:0
    XVE Count: 448
    Max XVE Thread Count: 8
    Max Core Frequency: 1.550 GHz
  - GPU 1: 0:58:0.0 : Display controller: Intel Corporation Device 0x0bda:
    BDF: 0:58:0:0
    XVE Count: 448
    Max XVE Thread Count: 8
    Max Core Frequency: 1.550 GHz
  - GPU 2: 0:154:0.0 : Display controller: Intel Corporation Device 0x0bda:
    BDF: 0:154:0:0
    XVE Count: 448
    Max XVE Thread Count: 8
    Max Core Frequency: 1.550 GHz
  - GPU 3: 0:202:0.0 : Display controller: Intel Corporation Device 0x0bda:
    BDF: 0:202:0:0
    XVE Count: 448
    Max XVE Thread Count: 8
    Max Core Frequency: 1.550 GHz