20-24 September 2021
US/Pacific timezone

BPF tracing: exploring additional debugging capabilities

20 Sep 2021, 07:00
40m
Networking and BPF Summit/Virtual-Room (LPC Virtual)

Networking and BPF Summit/Virtual-Room

LPC Virtual

150
Networking & BPF Summit (Closed) BPF & Networking Summit

Speaker

Alan Maguire (Oracle)

Description

Sometimes using tracing - instead of traditional kernel debuggers - to investigate kernel issues can be necessary. Some problems such as races are inherently time-sensitive, so minimally invasive tracing is ideal in such cases. However, it is also true that debuggers have capabilities that BPF-based tracing does not (or has recently acquired) - printing data structures, tracking local variable values, inline function visibility, etc. In fact looking at gdb capabilities is a great way to explore some possibilities for future tracing functionality. Here we explore some of the possibilities, the potential cost-benefit, and seek feedback and discussion with the community on the potential value of the approaches explored.

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Primary author

Alan Maguire (Oracle)

Presentation Materials

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