Safe Limits on Voltage Reduction Efficiency in GPUs: a Direct - PowerPoint PPT Presentation

Voltage Noise Background Die C4s Package Voltage Bulk Board Regulator Caps Caps Package Caps PCB Board 20

Voltage Noise Background Die C4s Package Voltage Bulk Board Regulator Caps Caps Package Caps PCB Board V VR 20

Voltage Noise Background Die C4s Package Voltage Bulk Board Regulator Caps Caps Package Caps PCB Board V VR 20

Voltage Noise Background Current Die C4s Package Voltage Bulk Board Regulator Caps Caps Package Caps PCB Board V VR 20

Voltage Noise Background Current Die C4s Package Voltage Bulk Board Regulator Caps Caps Package Caps PCB Board V VR V DD 20

Voltage Noise Background Current Die C4s Package Voltage Bulk Board Regulator Caps Caps Package Caps PCB Board IR drop V VR V DD 20

Voltage Noise Background Current Die C4s Package Voltage Bulk Board Regulator Caps Caps Package Caps PCB Board IR drop V VR V DD di/dt droop 20

Where does di/dt droop come from? Kernel Kernel Kernel GPU Program 21

Where does di/dt droop come from? • Kernel based activity patterns Kernel Kernel Kernel GPU Program 21

Where does di/dt droop come from? • Kernel based activity patterns • Inter kernel • Initial kernel • Intra kernel Kernel Kernel Kernel GPU Program 21

Where does di/dt droop come from? • Kernel based activity patterns • Inter kernel • Initial kernel • Intra kernel 22

Where does di/dt droop come from? • Kernel based activity patterns • Inter kernel • Initial kernel • Intra kernel Kernel Kernel Kernel GPU Program 22

Where does di/dt droop come from? • Kernel based activity patterns • Inter kernel • Initial kernel • Intra kernel Kernel Kernel Kernel GPU Program GPU Current 22

Where does di/dt droop come from? • Kernel based activity patterns • Inter kernel • Initial kernel • Intra kernel Kernel Kernel Kernel GPU Program 23

Where does di/dt droop come from? • Kernel based activity patterns • Inter kernel • Initial kernel • Intra kernel Kernel Kernel Kernel GPU Program GPU Current 23

Where does di/dt droop come from? • Kernel based activity patterns • Inter kernel • Initial kernel • Intra kernel Kernel Kernel Kernel GPU Program GPU Current 23

Where does di/dt droop come from? • Kernel based activity patterns • Inter kernel • Initial kernel • Intra kernel 24

Where does di/dt droop come from? • Kernel based activity patterns • Inter kernel • Initial kernel • Intra kernel Kernel Kernel Kernel GPU Program 24

Where does di/dt droop come from? • Kernel based activity patterns • Inter kernel • Initial kernel • Intra kernel Kernel Kernel Kernel GPU Program GPU Current 24

Where does di/dt droop come from? • Kernel based activity patterns • Inter kernel • Initial kernel • Intra kernel Kernel Kernel Kernel GPU Program Intra kernel GPU Current 24

Kernel Level V min Measurement 25

Kernel Level V min Measurement Kernel Kernel Kernel GPU Program 25

Kernel Level V min Measurement Kernel Kernel Kernel GPU Program Supply Voltage Undervolting 25

Kernel Level V min Measurement Kernel Kernel Kernel GPU Program Supply Voltage Undervolting Kernel-Level V min 25

Kernel Level V min Measurement Kernel Kernel Kernel GPU Program 26

Kernel Level V min Measurement Kernel Kernel Kernel GPU Program Supply Voltage Undervolting 26

Kernel Level V min Measurement Kernel Kernel Kernel GPU Program Supply Voltage Undervolting Kernel-Level V min 26

Program Level V min Measurement 27

Program Level V min Measurement Kernel Kernel Kernel GPU Program 27

Program Level V min Measurement Kernel Kernel Kernel GPU Program Supply Voltage 27

Program Level V min Measurement Kernel Kernel Kernel GPU Program Supply Voltage Undervolting 27