Add VRAM max bandwidth metric to GPU status

[bhatturu]

• Add vram_max_bandwidth field 31 to GPUStatus proto (after ProcessStatus)
• Collect from gpu_metrics in poll path (smi_gpu_fill_status)
• Mock returns 3276800 GB/s; real MI300X returns 5325 GB/s

Motivation

Technical Details

Test Plan

Test Result

bhatturu@quanta-ccs-aus-e15-19:~/device-metrics-exporter$ ./gpuctl show gpu statistics -i "36ff74a5-0000-1000-8052-3c26e867b349"

GPU id                                 : 36ff74a5-0000-1000-8052-3c26e867b349 (6)
Current graphics power (in Watts)      : 148
Temperature information:
  Junction temperature (in C)          : 47.0
  VRAM temperature (in C)              : 48.0
Current GPU usage:
  GFX utilization                      : 0% 0% 0% 0% 0% 0% 0% 0% 
  VCN utilization                      : 0% 0% 0% 0% 
  JPEG utilization                     : 0% 0% 0% 0% 0% 0% 0% 0% 
                                         0% 0% 0% 0% 0% 0% 0% 0% 
                                         0% 0% 0% 0% 0% 0% 0% 0% 
                                         0% 0% 0% 0% 0% 0% 0% 0% 
                                         N/A N/A N/A N/A N/A N/A N/A N/A 

PCIe statistics:
  Recovery count                       : 1
  Bidirectional bandwidth (in GB/s)    : 540391652
VRAM usage:
  Total VRAM (in MB)                   : 262128
  Used VRAM (in MB)                    : 283
  Free VRAM (in MB)                    : 261845
  Total visible VRAM (in MB)           : 262128
  Used visible VRAM (in MB)            : 283
  Free visible VRAM (in MB)            : 261845
  Total GTT (in MB)                    : 1160760
  Used GTT (in MB)                     : 24
  Free GTT (in MB)                     : 1160736
Accumulated energy consumed (in uJ)    : 4550317572096.00
Power usage (in Watts)                 : 148
GFX activity accumulated               : 175
Link 2 data written (in KB)            : 1
Link 3 data written (in KB)            : 1
Link 4 data read (in KB)               : 1
Link 4 data written (in KB)            : 1
Link 5 data read (in KB)               : 1
Link 5 data written (in KB)            : 1
Link 6 data written (in KB)            : 1
Link 7 data read (in KB)               : 1
Link 7 data written (in KB)            : 1
Link 8 data written (in KB)            : 1
Current accumulated counter            : 30700743
Processor hot residency accumulated    : 0
PPT residency accumulated              : 17872
Socket thermal residency accumulated   : 0
VR thermal residency accumulated       : 0
HBM thermal residency accumulated      : 0
Processor hot residency percentage     : 0%
PPT residency percentage               : 0%
Socket thermal residency percentage    : 0%
VR thermal residency percentage        : 0%
HBM thermal residency percentage       : 0%
VRAM max bandwidth (in GB/s)           : 6144

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

No. of gpus : 1

Submission Checklist

• Look over the contributing guidelines at https://github.com/ROCm/ROCm/blob/develop/CONTRIBUTING.md#pull-requests.