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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...).
We recommend to run kernels for at least ~1s and automatically perform repeated invocations to the command line tool concurrently in order 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.
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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 and automatically perform repeated invocations to the command line tool concurrently in order 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 line 84.:
| Code Block |
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[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 |
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bittware_power
acl0: 64.86W
acl1: 65.99W
[tester@fpga-0001 tmp]$ bittware_power -c0
acl0: 64.91W
[tester@fpga-0001 tmp]$ bittware_power -c1
acl1: 65.99W |
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Run with --help to get a list of command line arguments. For example, with -c the 520N card of interest can be selected.