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Xilinx U280

The Xilinx xrt driver allows to measure power using a standalone command line tool. The specific tool invocation and output format depends on the xrt version (module xilinx/xrt and configuration constraint xilinx_u280_xrt...).

Usage example and sample output for xrt 2.12, after selecting the first card. During this example, the card is idle and configured with the validation bitstream. Total card power in line 17.

[tester@n2fpga02 ~]$ ml fpga
[tester@n2fpga02 ~]$ ml xilinx/xrt/2.12
[tester@n2fpga02 ~]$ xbutil examine
...
Devices present
  [0000:a1:00.1] : xilinx_u280_xdma_201920_3 user(inst=129) 
  [0000:81:00.1] : xilinx_u280_xdma_201920_3 user(inst=130) 
  [0000:01:00.1] : xilinx_u280_xdma_201920_3 user(inst=128) 
  
[tester@n2fpga02 ~]$ xbutil examine -d 0000:a1:00.1 --report electrical

-----------------------------------------------
1/1 [0000:a1:00.1] : xilinx_u280_xdma_201920_3
-----------------------------------------------
Electrical
  Max Power              : 225 Watts
  Power                  : 33.793573 Watts
  Power Warning          : false

  Power Rails            : Voltage   Current
  12 Volts Auxillary     : 12.199 V,  1.363 A
  12 Volts PCI Express   : 12.192 V,  1.408 A
  3.3 Volts PCI Express  :  3.286 V
  3.3 Volts Auxillary    :  3.292 V
  Internal FPGA Vcc      :  0.851 V,  5.076 A
  DDR Vpp Bottom         :  2.500 V
  DDR Vpp Top            :  2.500 V
  5.5 Volts System       :  5.488 V
  Vcc 1.2 Volts Top      :  1.212 V
  Vcc 1.2 Volts Bottom   :  1.204 V
  1.8 Volts Top          :  1.808 V
  0.9 Volts Vcc          :  0.901 V
  12 Volts SW            : 12.235 V
  Mgt Vtt                :  1.203 V

Bittware 520N

The Bittware driver allows to measure power using a standalone command line tool that queries the board power via the i2c bus. It's available on all FPGA nodes with Bittware 520N cards (irrespective of the constraint).

  • This tool currently requires special permissions. You can request those via email to pc2-support@uni-paderborn.de.

  • We recommend to run kernels for at least ~1s to get reasonably accurate results. Further effects of increased power consumption due to thermal effects can be observed after multiple minutes of load on the cards, but are comparably minor.

Usage example and sample output. During this example, the card is executing a small sample kernel. Total card power in last row.

[tester@fpga-0001 tmp]$ newgrp dialout
[tester@fpga-0001 tmp]$ /usr/share/nallatech/520n/bist/utilities/nalla_serial_cardmon/bin/nalla_serial_cardmon
###################################
520 nalla_serial card monitor utility
version 2.3
###################################
System manager version 0x142

FPGA fabric over temperature limit:	100 degC
FPGA tile over temperature limit:	100 degC
Over temperature:			NOT TRIPPED

            Voltages
            --------
       PCIE_12V0 (V) : 11.98
       EXT2_12V0 (V) : 12.10
       EXT1_12V0 (V) : 12.14
         VCC_1V2 (V) :  1.20
         VCC_0V9 (V) :  0.86
        VID_VOUT (V) :  0.86
        VCCR_1V0 (V) :  1.13
        VCCT_1V0 (V) :  1.12
         VCC_2V5 (V) :  2.50
         VCC_1V8 (V) :  1.86
         VCC_3V3 (V) :  3.28
        VCC_1V8A (V) :  1.79
        VCC_ERAM (V) :  0.92

Power up watchdog OK

          PSU health : 0x8fff
           PCIE_12V0 : UP
           EXT1_12V0 : UP
           EXT2_12V0 : UP
             VCC_0V9 : UP
            VCCR_1V0 : UP
            VCCT_1V0 : UP
            VCC_ERAM : UP
             VCC_1V8 : UP
            VCC_1V8A : UP
             VCC_1V2 : UP
             VCC_2V5 : UP
             VCC_3V3 : UP

        Temperatures
        ------------
       Front PCB (C) :  39.6
      Centre PCB (C) :  35.5
        Rear PCB (C) :  34.0
FPGA fabric temperature (deg C): 40.44
FPGA tile temperature (deg C): 35.19
Core PH12: controller temperature (C) :  38.4
Core PH12: phase 0 temperature (C) :  39.5
Core PH12: phase 1 temperature (C) :  40.1
Core PH34: controller temperature (C) :  37.7
Core PH34: phase 0 temperature (C) :  40.3
Core PH34: phase 1 temperature (C) :  40.3
Core PH56: controller temperature (C) :  33.1
Core PH56: phase 0 temperature (C) :  34.1
Core PH56: phase 1 temperature (C) :  34.4
VCCR_1V8A: controller temperature (C) :  44.1
VCCR_1V8A: phase 0 temperature (C) :  45.6
VCCR_1V8A: phase 1 temperature (C) :  45.6
1V2_3V3: controller temperature (C) :  42.9
1V2_3V3: phase 0 temperature (C) :  45.9
1V2_3V3: phase 1 temperature (C) :  45.7

  Power Measurements
  ------------------
       VCCR iout (A) :  3.19
       1V8A iout (A) :  2.64
        1V2 iout (A) :  2.02
        3V3 iout (A) :  3.88
  Core PH12 iout (A) :  8.88
  Core PH34 iout (A) :  9.78
  Core PH56 iout (A) :  1.94
 Total Core iout (A) : 20.60
TI INA219 current monitor, PCIe 12V bus voltage (V) : 12.03
TI INA219 current monitor, PCIe 12V current (A) : 2.28
TI INA219 current monitor, Ext1 12V bus voltage (V) : 12.10
TI INA219 current monitor, Ext1 12V current (A) : 1.98
TI INA219 current monitor, Ext2 12V bus voltage (V) : 12.11
TI INA219 current monitor, Ext2 12V current (A) : 0.32
Total board power (W): 60.25

The tool supports a couple of command line flags. Run with --help to get a list. For example, with -c the 520N card of interest can be selected.

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