PantheonSim / GPUs / NVIDIA A10

Simulated NVIDIA A10: a GPU profile for CUDA and ROCm testing

PantheonSim, the GPU simulator for CUDA and ROCm, simulates the NVIDIA A10 (Ampere, 8.6) as the profile nvidia/a10. A 24 GB Ampere board in a single slot, used for AI inference, video and virtual workstations in servers. Its profile is verified, which means it was read from a physical card.

The profile at a glance

These are the numbers a program can ask this simulated GPU, and the values nvidia-smi show for it. They come from the profile file in the simulator's repository, pinned to one commit of it.

Property	Value
Profile id	`nvidia/a10`
Vendor and architecture	NVIDIA, Ampere
Compute capability	`8.6`
Device memory	22.1 GiB, GDDR
Streaming multiprocessors	72
Warp size	32
Max threads per multiprocessor	1536
Shared memory per block (opt-in maximum)	99 KiB
L2 cache	6 MiB
Memory bus width	384-bit
Power limit (profile)	150 W
Maximum clocks (profile)	1695 MHz shader, 6251 MHz memory
ECC memory	yes
PCIe link reported	Gen4 x16
Tensor or matrix cores	yes
Verified (measured on a physical card)	yes

What this GPU is for

A 24 GB Ampere board in a single slot, used for AI inference, video and virtual workstations in servers.

Ampere covers two compute capabilities in these profiles: 8.0 for the GA100 data-center parts and 8.6 for the GA10x parts. The simulator runs the SASS a binary carries for the architecture and falls back to PTX when it carries none.

Among the 37 NVIDIA profiles it ranks 29th by device memory (22.1 GiB) and 28th by SMs (72), counting the largest as first.

Is this profile verified?

Yes. This profile is marked verified, which means its values were read from a physical NVIDIA A10 by the simulator's characterization tools, not copied from a data sheet. Verified describes the profile's numbers: it says nothing about speed, because the simulator has no timing model.

Simulate this GPU

Build the simulator (see the docs) or open the playground, then:

nvcc -cudart shared -arch=compute_86 my_app.cu -o my_app
vgpu run --gpu nvidia/a10 ./my_app
vgpu shell -y --gpu nvidia/a10 --count 4
vgpu info --gpu nvidia/a10

This profile is compute capability 8.6. A kernel built for compute_75 runs on it and on every other NVIDIA profile; a kernel built for a newer architecture is refused by a profile that is older than it. Link the CUDA runtime shared (-cudart shared) so the simulator can stand in for it.

To use it every time, put gpu: nvidia/a10 in a pantheonsim.yaml settings file, or in a GitHub Actions job give the PantheonSim action gpu: nvidia/a10 (see CUDA and HIP tests in GitHub Actions). The simulator checks behaviour and has no timing model, so a run on a physical GPU before a release still counts. The CUDA guide explains the rest.

Where the numbers come from

Each profile file begins with a note on its sources. This is the note for NVIDIA A10, as written in the file:

Source note for nvidia/a10

Generated by nvidia/tools/characterize.cu on a physical A10 (Lambda gpu_1x_a10). Every value below was read from the hardware, not a datasheet.

The GPU index lists every profile, and this one is measured on a physical card.

Other Ampere profiles: