TT-SMI

Tenstorrent System Management Interface (TT-SMI) is a command line utility to interact with all Tenstorrent devices on host.

The main objective of TT-SMI is to provide a simple and easy-to-use interface to display devices, device telemetry, and system information.

TT-SMI is also used to issue board-level resets.

Important Notes

[!IMPORTANT] As of v4.0.0 we are officially using tt-umd as our backend. To use the luwen backend, please use the --use_luwen flag. Please file any issues you see with the umd-backend label

[!IMPORTANT] TT-SMI needs driver version ≥ 2.0.0 to work correctly. Please install the correct version from tt-kmd.

[!CAUTION] As of v3.0.35 we no longer support Grayskull Devices on TT-SMI. Kernel mode driver support for Grayskull was depreciated in ttkmd-2.2.0

[!CAUTION] Reset will not work on ARM systems since PCIe config is set up differently on those systems. Only way to perform a reliable board reset on those systems is to reboot the host.

Official Repository

https://github.com/tenstorrent/tt-smi/

Getting started

Install Rust (if you don't already have it)

If Rust isn't already installed on your system, you can install it through either of the following methods:

Using Distribution packages (preferred)

• Fedora / EL9

  sudo dnf install cargo

• Ubuntu / Debian

  sudo apt install cargo

Using Rustup

curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh
source "$HOME/.cargo/env"

Installation (for users)

tt-smi is available on PyPI. We recommend running it with uvx, which ensures you always run the latest released version.

Install uv if you don't already have it:

curl -LsSf https://astral.sh/uv/install.sh | sh

Then run tt-smi:

uvx tt-smi@latest

Pass tt-smi flags after the package spec, e.g. uvx tt-smi@latest -s.

Installation (for developers)

Clone the repository

git clone https://github.com/tenstorrent/tt-smi.git
cd tt-smi

Install

uv sync

This creates a .venv and installs tt-smi in editable mode along with its dependencies. Run the local build with uv run tt-smi, or activate the venv (source .venv/bin/activate) and use tt-smi directly.

Recommended: install the pre-commit hooks so there is auto-formatting for all files on commit.

uv run pre-commit install

Usage

tt-smi can be used as a GUI (tt-smi) or CLI (tt-smi -s) to display system information and Tenstorrent device telemetry, and it can be used to reset Tenstorrent devices (tt-smi -r).

tt-smi [-h] [-l] [-v] [-s] [-ls] [-f [snapshot filename]] [-c] [-r [TARGETS ...]] [--snapshot_no_tty] [-glx_reset] [-glx_reset_auto] [-glx_list_tray_to_device] [--no_reinit]

Getting Help

Running tt-smi with the -h, --help flag displays the help text.

$ tt-smi -h
usage: tt-smi [-h] [-l] [-v] [-s] [-ls] [-f [snapshot filename]] [-c] [-r [TARGETS ...]] [--snapshot_no_tty] [-glx_reset] [-glx_reset_auto] [-glx_list_tray_to_device] [--no_reinit] [--use_luwen]

Tenstorrent System Management Interface (TT-SMI) is a command line utility to interact with all Tenstorrent devices on host. The main objective of TT-SMI is to provide a simple and easy-to-use
interface to display devices, device telemetry, and system information. TT-SMI is also used to issue board-level resets.

options:
  -h, --help            show this help message and exit
  -l, --local           Run on local chips (Wormhole only)
  -v, --version         show program's version number and exit
  -s, --snapshot        Dump snapshot of current tt-smi information to STDOUT
  -ls, --list           List boards on the host and quit (UMD: UMD Chip ID, PCI BDF, PCI Dev ID, …)
  -f [snapshot filename], --filename [snapshot filename]
                        Write snapshot to a file. Default: ~/tt_smi/<timestamp>_snapshot.json
  -c, --compact         Run in compact mode, hiding the sidebar and other static elements
  -r [TARGETS ...], --reset [TARGETS ...]
                        Reset targets: UMD logical IDs, PCI BDFs (e.g. 0000:0a:00.0), or /dev/tenstorrent/<id>. Use -ls to list devices. Omit targets or use "all" to reset all devices. Do not mix types in one command.
  --snapshot_no_tty     Force no-tty behavior in the snapshot to stdout
  -glx_reset, --galaxy_6u_trays_reset
                        Reset all the ASICs on the galaxy host
  -glx_reset_auto, --galaxy_6u_trays_reset_auto
                        Reset all ASICs on the galaxy host, but do auto retries up to 3 times if reset fails
  -glx_list_tray_to_device, --galaxy_6u_list_tray_to_device
                        List the mapping of devices to trays on the galaxy
  --no_reinit           Don't detect devices post reset
  --use_luwen           Use deprecated Luwen driver instead of UMD (default).

These options will be discussed in more detail in the following sections.

GUI

To bring up the tt-smi GUI run

$ tt-smi

This is the default mode where the user can view device information, telemetry, and firmware versions.

Keyboard Shortcuts

All GUI keyboard shortcuts can be found in the help menu that user can bring up by pressing the h key or clicking the help button on the footer.

GUI Field Reference

The GUI has five tabs. Each row is one device (except the Processes tab, which lists host processes using Tenstorrent devices, and the GDDR Telemetry tab, which lists one row per GDDR channel). Several Telemetry values are shown as current / limit when a firmware limit is available.

Information (1)

Telemetry (2)

Live device metrics updated about every 100 ms. Where a limit applies, values appear as measured / limit.

GDDR Telemetry (3)

Live per-channel GDDR metrics updated about every 100 ms. Blackhole reports temperatures, EDC error counts, training, and BIST for up to 8 channels. Wormhole reports training status for 6 channels; other fields show N/A. Harvested channels are marked Harvested = Y with the remaining fields shown as -.

FW Version (4)

Processes (5)

Host processes currently holding open Tenstorrent device handles. Updated about every 100 ms.

Listing devices

Use tt-smi -ls or tt-smi --list to print a table of Tenstorrent devices and exit (no GUI). This is the easiest way to see UMD Chip ID, PCI BDF, and /dev/tenstorrent/<n> (shown as PCI Dev ID) for each board—use these values with tt-smi -r as described in Resets.

With the UMD backend (default), output includes two tables:

• All available boards on host (UMD) — every device TT-SMI discovered.
• Boards that can be reset (UMD) — devices eligible for tt-smi -r.

Column meanings:

On large hosts (e.g. Galaxy), UMD Chip ID and /dev/tenstorrent/<n> are not always the same number—always use -ls to pick the correct target.

During discovery, tt-umd may print log lines (for example Ethernet heartbeat checks on Galaxy). Those messages are from the driver; the tables below still list the boards.

Example: Blackhole Galaxy (32 ASICs, UMD)

Abbreviated output from a 32-board Galaxy system; your PCI BDFs and /dev/tenstorrent/<n> assignments will differ.

$ tt-smi -ls
… UMD may log info/warning lines during topology discovery …
Gathering Information ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 100% 0:00:00
                                All available boards on host (UMD):
┏━━━━━━━━━━━━━┳━━━━━━━━━━━━━━┳━━━━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━┳━━━━━━━━━━━━━━━┳━━━━━━━━━━━━━━━━━━┓
┃ UMD Chip ID ┃ PCI BDF      ┃ PCI Dev ID          ┃ Board Type ┃ Device Series ┃ Board Number     ┃
┡━━━━━━━━━━━━━╇━━━━━━━━━━━━━━╇━━━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━╇━━━━━━━━━━━━━━━╇━━━━━━━━━━━━━━━━━━┩
│ 0           │ 0000:01:00.0 │ /dev/tenstorrent/19 │ Blackhole  │ tt-galaxy-bh  │ 0000047131831011 │
│ 1           │ 0000:02:00.0 │ /dev/tenstorrent/18 │ Blackhole  │ tt-galaxy-bh  │ 0000047131831011 │
│ 2           │ 0000:03:00.0 │ /dev/tenstorrent/25 │ Blackhole  │ tt-galaxy-bh  │ 0000047131831011 │
│ …           │ …            │ …                   │ …          │ …             │ …                │
│ 31          │ 0000:c8:00.0 │ /dev/tenstorrent/6  │ Blackhole  │ tt-galaxy-bh  │ 0000047131831011 │
└─────────────┴──────────────┴─────────────────────┴────────────┴───────────────┴──────────────────┘
                                  Boards that can be reset (UMD):
┏━━━━━━━━━━━━━┳━━━━━━━━━━━━━━┳━━━━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━┳━━━━━━━━━━━━━━━┳━━━━━━━━━━━━━━━━━━┓
┃ UMD Chip ID ┃ PCI BDF      ┃ PCI Dev ID          ┃ Board Type ┃ Device Series ┃ Board Number     ┃
┡━━━━━━━━━━━━━╇━━━━━━━━━━━━━━╇━━━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━╇━━━━━━━━━━━━━━━╇━━━━━━━━━━━━━━━━━━┩
│ 0           │ 0000:01:00.0 │ /dev/tenstorrent/19 │ Blackhole  │ tt-galaxy-bh  │ 0000047131831011 │
│ …           │ …            │ …                   │ …          │ …             │ …                │
└─────────────┴──────────────┴─────────────────────┴────────────┴───────────────┴──────────────────┘

With --use_luwen, the table layout differs (no UMD Chip ID column); use PCI BDF and /dev/tenstorrent/<n> for tt-smi -r when using Luwen.

Resets

Another feature of tt-smi is performing resets on Blackhole and Wormhole PCIe cards and galaxy machines, using the -r / --reset argument.

Reset targets are parsed as one type per invocation (do not mix UMD logical IDs, PCI BDFs, and /dev/tenstorrent/<id> paths in the same command).

UMD (default backend)

With the UMD backend (default, no --use_luwen), -r accepts four kinds of input:

• No arguments or all — reset every detected device (tt-smi -r or tt-smi -r all).
• UMD logical chip IDs — comma-separated integers, e.g. 0, 1, 2 (same numbering as UMD device enumeration).
• PCI BDF — full address, e.g. 0000:0a:00.0 (comma-separated for multiple devices).
• /dev/tenstorrent/<id> — device node index, e.g. /dev/tenstorrent/0.

Luwen (--use_luwen)

With the Luwen backend, -r accepts three kinds of input:

• No arguments or all — reset all devices discovered via Luwen.
• PCI BDF — as above.
• /dev/tenstorrent/<id> — as above.

Note: A bare integer (e.g. 0) is not a valid Luwen reset target. Use the /dev/tenstorrent/0 form instead.

• Example (invalid with Luwen): tt-smi -r 0 --use_luwen
• Example (valid with Luwen): tt-smi -r /dev/tenstorrent/0 --use_luwen

Examples of valid resets

tt-smi -r 0000:0a:00.0,0000:0b:00.0
tt-smi -r /dev/tenstorrent/0,/dev/tenstorrent/2,/dev/tenstorrent/3
tt-smi -r 0,1,2                    # UMD logical IDs (UMD / default backend only)
tt-smi -r                          # or: tt-smi -r all

Use tt-smi -ls (or tt-smi --list) to list boards; see Listing devices for UMD Chip ID, PCI BDF, and /dev/tenstorrent/<id> columns.

By default, the reset command will re-initialize the boards after reset. Use the --no_reinit arg to skip this.

Galaxy resets

There are several options available for resetting Galaxy 6U trays.

• Use the -r/--reset argument and treat it like any other pcie card. Warning - Needs CPLD FW v1.16 or higher.
• glx_reset: resets the galaxy, informs users if an Ethernet failure has been detected
• glx_reset_auto: same as -glx_reset, but resets up to 3 times if an Ethernet failure has been detected

Full galaxy reset

tt-smi -glx_reset
 Resetting WH Galaxy trays with reset command...
Executing command: sudo ipmitool raw 0x30 0x8B 0xF 0xFF 0x0 0xF
Waiting for 30 seconds: 30
Driver loaded
 Re-initializing boards after reset....
 Detected Chips: 32
 Re-initialized 32 boards after reset. Exiting...

To identify the correct tray number for resetting specific devices, users can run tt-smi -glx_list_tray_to_device / --galaxy_6u_list_tray_to_device. This command displays a mapping table that shows the relationship between tray numbers, tray bus IDs, and the corresponding PCI device IDs, making it easier to target the appropriate devices for reset operations. Note that this command should not be run in a virtual machine (VM) environment as it requires direct hardware access to the Galaxy system.

$ tt-sml -glx_list_tray_to_device

Gathering Information ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 100% 0:00:00
      Mapping of trays to devices on the galaxy:
┏━━━━━━━━━━━━━┳━━━━━━━━━━━━━┳━━━━━━━━━━━━━━━━━━━━━━━━━┓
┃ Tray Number ┃ Tray Bus ID ┃ PCI Dev ID              ┃
┡━━━━━━━━━━━━━╇━━━━━━━━━━━━━╇━━━━━━━━━━━━━━━━━━━━━━━━━┩
│ 1           │ 0xc0        │ 0,1,2,3,4,5,6,7         │
│ 2           │ 0x80        │ 8,9,10,11,12,13,14,15   │
│ 3           │ 0x00        │ 16,17,18,19,20,21,22,23 │
│ 4           │ 0x40        │ 24,25,26,27,28,29,30,31 │
└─────────────┴─────────────┴─────────────────────────┘

Snapshots

TT-SMI provides an easy way to get all the information that is displayed on the GUI in a json format using the -s / --snapshot argument. This prints the snapshot info directly to STDOUT. Use the -f option to save the output to a file. By default the file is named and stored as ~/tt_smi/<timestamp>_snapshot.json, but users can also provide their own filename if desired.

Example usage:

$ tt-smi -f tt_smi_example.json

    Gathering Information ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 100% 0:00:00
      Saved tt-smi log to: tt_smi_example.json

$ tt-smi -s

    Gathering Information ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 100% 0:00:00
    {
        "time": "2025-02-04T13:04:50.313105",
        "host_info": {
            "OS": "Linux",
            "Distro": "Ubuntu 20.04.6 LTS",
            "Kernel": "5.15.0-130-generic",
        .........

License

Apache 2.0 - https://www.apache.org/licenses/LICENSE-2.0.txt