Example: GPU Stress Test
Test system: DGX with 8x A100 GPUs
Single GPU
julia> stresstest(device(); duration=10)
[ Info: Will try to run for approximately 10 seconds on each GPU.
[ Info: Running StressTest{Float32} on Julia thread 2 and CuDevice(0).
[ Info: Ran 11241 iterations on CuDevice(0).
[ Info: Clearing GPU memory.
[ Info: Took 10.0 seconds to run the tests.Multiple GPUs
First, make sure to run Julia with enough threads (more or equal to the number of GPU devices). Then, to run a GPU Stress test, use stresstest.
In the following example, I started Julia with julia -t 20 (why not? 😄).
julia> using GPUInspector
julia> stresstest(CUDA.devices(); duration=10)
[ Info: Will try to run for approximately 10 seconds on each GPU.
[ Info: Running StressTest{Float32} on Julia thread 2 and CuDevice(0).
[ Info: Running StressTest{Float32} on Julia thread 8 and CuDevice(6).
[ Info: Running StressTest{Float32} on Julia thread 4 and CuDevice(2).
[ Info: Running StressTest{Float32} on Julia thread 7 and CuDevice(5).
[ Info: Running StressTest{Float32} on Julia thread 5 and CuDevice(3).
[ Info: Running StressTest{Float32} on Julia thread 9 and CuDevice(7).
[ Info: Running StressTest{Float32} on Julia thread 6 and CuDevice(4).
[ Info: Running StressTest{Float32} on Julia thread 3 and CuDevice(1).
[ Info: Ran 11222 iterations on CuDevice(3).
[ Info: Ran 11203 iterations on CuDevice(6).
[ Info: Ran 11227 iterations on CuDevice(2).
[ Info: Ran 11230 iterations on CuDevice(4).
[ Info: Ran 11231 iterations on CuDevice(1).
[ Info: Ran 11199 iterations on CuDevice(0).
[ Info: Ran 11215 iterations on CuDevice(5).
[ Info: Ran 11246 iterations on CuDevice(7).
[ Info: Clearing GPU memory.
[ Info: Took 10.0 seconds to run the tests.Monitoring
To verify that the GPUs are actually busy you could use external tools like, e.g., nvidia-smi. However, we also provide built-in monitoring tools.
julia> using GPUInspector
julia> monitoring_start()
[ Info: Spawning monitoring on Julia thread 20.
julia> stresstest(devices(); duration=10) # all devices, 10 seconds
[ Info: Will try to run for approximately 10 seconds on each GPU.
[ Info: Running StressTest{Float32} on Julia thread 4 and CuDevice(2).
[ Info: Running StressTest{Float32} on Julia thread 2 and CuDevice(0).
[ Info: Running StressTest{Float32} on Julia thread 6 and CuDevice(4).
[ Info: Running StressTest{Float32} on Julia thread 3 and CuDevice(1).
[ Info: Running StressTest{Float32} on Julia thread 9 and CuDevice(7).
[ Info: Running StressTest{Float32} on Julia thread 7 and CuDevice(5).
[ Info: Running StressTest{Float32} on Julia thread 5 and CuDevice(3).
[ Info: Running StressTest{Float32} on Julia thread 8 and CuDevice(6).
[ Info: Ran 11215 iterations on CuDevice(2).
[ Info: Ran 11241 iterations on CuDevice(6).
[ Info: Ran 11261 iterations on CuDevice(1).
[ Info: Ran 11236 iterations on CuDevice(5).
[ Info: Ran 11263 iterations on CuDevice(4).
[ Info: Ran 11261 iterations on CuDevice(3).
[ Info: Ran 11270 iterations on CuDevice(7).
[ Info: Ran 11241 iterations on CuDevice(0).
[ Info: Clearing GPU memory.
[ Info: Took 10.0 seconds to run the tests.
julia> results = monitoring_stop();
[ Info: Stopping monitoring and fetching results...Here, results is a MonitoringResults object with time series information about GPU utilization, temperature, and more. See monitoring_stop for details.
You can use save_monitoring_results to save the results on disk. We also provide plot_monitoring_results to visualize the results, which should give you an output like this.
julia> plot_monitoring_results(results)
⠀⠀⠀⠀⠀⠀⠀⠀⠀GPU Utilization (Compute)
┌────────────────────────────────────────┐
105 │⠀⠀⠀⠀⡤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⠤⢤⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀│ GPU 0: NVIDIA A100-SXM4-40GB
│⠀⠀⠀⢰⠁⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠈⡆⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀│ GPU 1: NVIDIA A100-SXM4-40GB
│⠀⠀⠀⢸⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⡇⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀│ GPU 2: NVIDIA A100-SXM4-40GB
│⠀⠀⠀⢸⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⡇⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀│ GPU 3: NVIDIA A100-SXM4-40GB
│⠀⠀⠀⡸⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢇⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀│ GPU 4: NVIDIA A100-SXM4-40GB
│⠀⠀⠀⡇⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢸⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀│ GPU 5: NVIDIA A100-SXM4-40GB
│⠀⠀⠀⡇⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢸⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀│ GPU 6: NVIDIA A100-SXM4-40GB
U [%] │⠀⠀⠀⡇⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢸⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀│ GPU 7: NVIDIA A100-SXM4-40GB
│⠀⠀⢰⠁⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠈⡆⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀│
│⠀⠀⢸⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⡇⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀│
│⠀⠀⢸⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⡇⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀│
│⠀⠀⡸⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢇⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀│
│⠀⠀⡇⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢸⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀│
│⠀⠀⡇⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢸⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀│
0 │⣀⣀⡇⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢸⣀⣀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀│
└────────────────────────────────────────┘
⠀0⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀20⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀Time [s]⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀GPU Temperature⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
┌────────────────────────────────────────┐
63 │⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀│ GPU 0: NVIDIA A100-SXM4-40GB
│⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢀⡠⠤⠤⠤⠒⢒⣲⡀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀│ GPU 1: NVIDIA A100-SXM4-40GB
│⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢀⡠⠤⠒⠊⣁⠤⣤⠤⠶⠮⠛⠛⡇⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀│ GPU 2: NVIDIA A100-SXM4-40GB
│⠀⠀⠀⠀⠀⠀⠀⡠⣒⣉⣉⣭⣓⠭⠛⠋⠉⠉⠉⠀⠀⠀⠀⠀⠀⢻⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀│ GPU 3: NVIDIA A100-SXM4-40GB
│⠀⠀⠀⠀⠀⢠⣮⠮⠊⠁⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢀⡠⢤⣤⠸⡄⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀│ GPU 4: NVIDIA A100-SXM4-40GB
│⠀⠀⠀⠀⢠⡿⠁⠀⠀⠀⠀⠀⢀⡠⠤⣤⠤⠶⠮⠛⠋⣉⠭⠥⠤⡇⡇⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀│ GPU 5: NVIDIA A100-SXM4-40GB
│⠀⠀⠀⢠⣷⠁⠀⣠⣒⠶⠒⢉⣉⢭⣛⣒⣒⡪⠝⠛⠛⠊⠉⠉⠉⣿⢸⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀│ GPU 6: NVIDIA A100-SXM4-40GB
T [C] │⠀⠀⠀⣼⠃⢠⠊⣁⠤⠔⠚⠓⠊⠁⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢻⡞⠲⡤⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀│ GPU 7: NVIDIA A100-SXM4-40GB
│⠀⠀⢠⡏⢠⣿⠋⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠸⣧⠀⠈⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀│
│⠀⠀⣼⢡⣷⠃⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢿⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀│
│⠤⠤⡟⣸⡇⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠸⡳⡢⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀│
│⠉⠛⢇⡟⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠈⠪⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀│
│⠀⠀⣸⠁⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀│
│⠒⠒⡇⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀│
28 │⠉⠉⠁⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀│
└────────────────────────────────────────┘
⠀0⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀20⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀Time [s]⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀GPU Power Usage⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
┌────────────────────────────────────────┐
340 │⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢀⣀⣀⣀⣀⣀⣀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀│ GPU 0: NVIDIA A100-SXM4-40GB
│⠀⠀⠀⠀⣤⣠⣤⣤⣶⡶⠶⠶⠶⠾⠿⠿⣶⣿⣷⣶⣶⣶⣒⣒⣺⡄⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀│ GPU 1: NVIDIA A100-SXM4-40GB
│⠀⠀⠀⢰⡯⡭⡿⠟⠛⠛⠛⠛⠛⠛⠉⠉⠉⠉⠉⠉⠉⠉⠉⠉⠹⡇⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀│ GPU 2: NVIDIA A100-SXM4-40GB
│⠀⠀⠀⢸⠋⡜⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⡇⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀│ GPU 3: NVIDIA A100-SXM4-40GB
│⠀⠀⠀⢸⡰⠁⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣧⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀│ GPU 4: NVIDIA A100-SXM4-40GB
│⠀⠀⠀⣾⠇⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢻⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀│ GPU 5: NVIDIA A100-SXM4-40GB
│⠀⠀⠀⣿⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢸⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀│ GPU 6: NVIDIA A100-SXM4-40GB
P [W] │⠀⠀⠀⣿⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢸⡄⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀│ GPU 7: NVIDIA A100-SXM4-40GB
│⠀⠀⢠⡇⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠈⡇⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀│
│⠀⠀⢸⡇⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⡇⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀│
│⠀⠀⢸⠁⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣧⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀│
│⠀⠀⣼⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢹⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀│
│⠀⠀⡟⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢸⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀│
│⠀⠀⡇⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢸⣶⣶⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀│
56 │⣶⣶⡇⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠈⠙⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀│
└────────────────────────────────────────┘
⠀0⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀20⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀Time [s]⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀ Note that for convenience stresstest also takes a monitoring keyword argument which can be used to automatically trigger the starting and stopping of the monitoring.