17. gc-powertest
This tool is used to test power consumption and temperature of the IPU processor.
Note that:
The program runs indefinitely until killed (with Ctrl-C).
It can be run multiple times to start code on other IPUs.
Temperatures are reported in degrees Celsius.
After running
gc-powertestit’s a good idea to reset the IPUs (using the gc-reset tool) otherwise they’ll be left running at high power.
To use this tool, run:
gc-powertest -d {device_id}
where {device_id} is the id number returned by the gc-inventory
tool.
A typical output is shown in Listing 17.1. This example is for a single IPU in an IPU-M2000. Similar output will be generated for other systems. The output is constantly updated until the process is terminated.
| CARD LEVEL | IPU#0 |
+--------------------------------------------------------------------------------------------------------------------------------------
| XDPE132G5C | B_COL0:1 B_COL1:1 B_IN:1 B_MID:1 B_OUT:1 | 0:PVT0 0:PVT1 0:PVT2 0:PVTE CLOCK |
+--------------------------------------------------------------------------------------------------------------------------------------
| 0001: 123.50W 049.00W T172.50W | 041C 040C 036C 032C 039C | 040.7C 039.6C 040.5C 038.3C 1330MHz |
| 0002: 123.50W 048.50W T172.00W | 041C 040C 036C 032C 039C | 041.6C 040.5C 041.3C 038.8C 1330MHz |
| 0003: 124.00W 047.50W T171.50W | 041C 040C 036C 032C 039C | 041.8C 040.7C 041.8C 039.4C 1330MHz |
| 0004: 124.00W 048.00W T172.00W | 041C 040C 036C 032C 039C | 042.1C 041.3C 042.1C 039.6C 1330MHz |
| 0005: 124.50W 047.50W T172.00W | 041C 040C 036C 032C 039C | 042.7C 041.8C 042.4C 039.9C 1330MHz |
The first column (shown in detail in Listing 17.2) shows
power readings taken from the board at different locations. The first column of power readings is for IPU0, the second column for IPU1 and the third column (with the T prefix) is the total IPU power.
-------------------------------------
| XDPE132G5C |
-------------------------------------
| 0001: 123.50W 049.00W T172.50W |
| 0002: 123.50W 048.50W T172.00W |
| 0003: 124.00W 047.50W T171.50W |
| 0004: 124.00W 048.00W T172.00W |
| 0005: 124.50W 047.50W T172.00W |
The second column (shown in detail in Listing 17.3) shows temperature readings taken from the board at different locations. The columns are defined in Table 17.1.
CARD LEVEL |
-------------------------------------------------
| B_COL0:1 B_COL1:1 B_IN:1 B_MID:1 B_OUT:1 |
-------------------------------------------------
| 041C 040C 036C 032C 039C |
| 041C 040C 036C 032C 039C |
| 041C 040C 036C 032C 039C |
| 041C 040C 036C 032C 039C |
| 041C 040C 036C 032C 039C |
The third column (shown in detail in Listing 17.4) shows temperature and clock readings measured on the IPU.
| IPU#0 |
-----------------------------------------------------
| 0:PVT0 0:PVT1 0:PVT2 0:PVTE CLOCK |
-----------------------------------------------------
| 040.7C 039.6C 040.5C 038.3C 1330MHz |
| 041.6C 040.5C 041.3C 038.8C 1330MHz |
| 041.8C 040.7C 041.8C 039.4C 1330MHz |
| 042.1C 041.3C 042.1C 039.6C 1330MHz |
| 042.7C 041.8C 042.4C 039.9C 1330MHz |
Column Name |
Description |
|---|---|
B_COL0:0 |
temperature from sensor on Colossus 0 |
B_COL1:0 |
temperature from sensor on Colossus 1 |
B_IN:0 |
air inlet temperature |
B_MID:0 |
mid-board PCB temperature |
B_OUT:0 |
air exhaust temperature |
0:PVT0 |
temperature from first on-chip sensor (West Edge) |
0:PVT1 |
temperature from second on-chip sensor (West Edge) |
0:PVT2 |
temperature from third on-chip sensor (West Edge) |
0:PVTE |
temperature from fourth on-chip sensor (East Edge) |
CLOCK |
clock speed |
By default, the power test will run with 0% IPU processing load. The load can
be set with the -p option. This must be in multiples of 10%. For systems
older than IPU-M2000 only, 20%, 50% or 100% loads can be requested.
For example:
gc-powertest -d {device_id} -p 50
17.1. Usage
17.1.1. Allowed options
|
IPU load percentage (default: 0) |
|
Device id |
|
Use custom IPU binary file |
|
Verbose mode |
|
Emit JSON output |
|
Time in seconds of the measurements (0 is infinite) (default: 0) |
|
Produce help message |
|
Version number |