iovisor/bcc

stackcount option for stack depth limit

Open

#1,103 opened on Apr 8, 2017

View on GitHub
 (5 comments) (0 reactions) (0 assignees)C (4,065 forks)batch import
enhancementhelp wanted

Repository metrics

Stars
 (22,620 stars)
PR merge metrics
 (Avg merge 12d 6h) (12 merged PRs in 30d)

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