Linux utility (or windows) for monitoring power-related readings ? for Fermi ?

I’d like to know if there is any Linux utility (or windows) for monitoring power-related readings ? for Fermi ?
Linux is better.

How can I read temperature and power (?) related readings at runtime ? if it is possible.
Are there separate event counters for that ? and various ways to see the readings ?

Thanks !

nvidia-smi maybe?

$ nvidia-smi 

Wed Apr  4 16:52:24 2012       

+------------------------------------------------------+                       

| NVIDIA-SMI 2.285.05   Driver Version: 285.05.32      |                       

|-------------------------------+----------------------+----------------------+

| Nb.  Name                     | Bus Id        Disp.  | Volatile ECC SB / DB |

| Fan   Temp   Power Usage /Cap | Memory Usage         | GPU Util. Compute M. |

|===============================+======================+======================|

| 0.  Tesla C2050               | 0000:03:00.0  On     |         0          0 |

|  30%   61 C  P12   Off /  Off |   0%    6MB / 2687MB |    0%     Default    |

|-------------------------------+----------------------+----------------------|

| 1.  Tesla C2050               | 0000:04:00.0  Off    |         0          0 |

|  30%   58 C  P12   Off /  Off |   0%    6MB / 2687MB |    0%     Default    |

|-------------------------------+----------------------+----------------------|

| Compute processes:                                               GPU Memory |

|  GPU  PID     Process name                                       Usage      |

|=============================================================================|

|  No running compute processes found                                         |

+-----------------------------------------------------------------------------+

Thanks, I’ll try that.

Besides nvidia-smi you can also use NVML, which exposes management and monitoring functionality through an API.