DeviceInformation Struct Reference

#include <gromacs/hardware/device_information.h>

Collaboration diagram for DeviceInformation:

Description

Platform-dependent device information.

The device information is queried and set at detection and contains both information about the device/hardware returned by the runtime as well as additional data like support status.

Public Attributes
DeviceStatus	status
	Device status.
int	id
	ID of the device, ie. the index into the device order reported by the GPU runtime.
DeviceVendor	deviceVendor
	Device vendor.
gmx::FixedCapacityVector< int, 10 >	supportedSubGroupSizes
	Warp/sub-group sizes supported by the device. More...
gmx::GpuAwareMpiStatus	gpuAwareMpiStatus
std::optional< std::array < std::byte, 16 > >	uuid
	UUID of the device, when available. More...

Member Data Documentation

gmx::FixedCapacityVector<int, 10> DeviceInformation::supportedSubGroupSizes

Warp/sub-group sizes supported by the device.

DeviceInformation must be serializable in CUDA, so we cannot use std::vector here. Arbitrarily limiting to 10.

std::optional<std::array<std::byte, 16> > DeviceInformation::uuid

UUID of the device, when available.

If device UUIDs are not available, then multi-rank DLB may not work properly when environment variables restrict device visibility to each rank.

Note that even if the device and SDK support UUID queries, compatibility or version issues mean we need a field that might not contain a value in practice.

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The documentation for this struct was generated from the following file:

• src/gromacs/hardware/device_information.h