iovisor/bcc

stackcount option for stack depth limit

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#1,103 opened on Apr 8, 2017

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enhancementhelp wanted

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Description

Feature request for a stackcount option to limit the stack depth. Eg, "-l 5" for the top 5 frames only. get_stackid() should already support this, such that the filter and aggregation is done in kernel.

Contributor guide

Research direction
Modify the stackcount tool to accept a depth limit option ( l) and use get stackid() with a BPF STACK BUILD ID or BPF STACK TRACE in kernel to limit stack depth. Implement the logic in the Python frontend and the C BPF program.
Tech stack
cpython
Domain
observabilityperformance
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
Half day
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
LinuxBPFCPython
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
50