tt_device_accessible

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Name

Prometheus Metric Name

tt_device_accessible

Metric Path (tt-telemetry)

Schema:

{hostname}/tray{tray}/chip{chip}/tt_device_accessible

Example path:

bh-glx-c09u02/tray1/chip2/tt_device_accessible

Description

Whether a specific device is accessible and fully responsive. This provides a per-device accessibility indicator.

A device is considered accessible only when all of the following hold during the collection cycle:

• All of its metrics were readable (tt_device_metrics_readable_percent is 100%).

• Its PCIe link is alive (tt_pcie_link_alive is true — the chip responds to a PCIe BAR read).

• All of its NOCs are alive (tt_noc_alive is true for every NOC — the chip responds to NOC reads).

If any of these checks fails, the device is reported inaccessible.

Values

Type: Boolean

Units: None

Allowable values:

• True (1): The device is accessible: all metrics were readable and its PCIe link and NOCs are alive.

• False (0): The device is not accessible: one or more metrics could not be read, or the PCIe link or a NOC appears hung.

Prometheus Labels

Label Name	Value
hostname	The host from which the metric was collected.
hall	The datacenter hall where the host is located. Sourced from the Factory System Descriptor (FSD).
aisle	The datacenter aisle where the host is located. Sourced from the Factory System Descriptor (FSD).
rack	The rack number where the host is located. Sourced from the Factory System Descriptor (FSD).
shelf_u	The shelf U position in the rack where the host is located. Sourced from the Factory System Descriptor (FSD).
tray	The tray (UBB) that the device is located on.
chip	The ASIC location within the tray.