Linux Tcp Memory Parameter Calculator

What the source does

• FilesystemNone observedNo reads or writes in the source
• NetworkNone observedNo outbound calls in the source
• ShellNone observedNo commands run in the source
• DependenciesPinnedNothing floats
• SecretsNone foundNo keys in source

Five audit layers

Gates applied: no behavioural pass.

Audit 0.4.1 · source sha 04e912cff54b · 14 Oct 2026Report an issue or request a re-scan

• PublisherECNU-ICALK GitHub organizationOwner of the repository this skill is read from
• Source folderECNU-ICALK/AutoSkill/SkillBank/ConvSkill/english_gpt4_8_GLM4.7/linux-tcp-memory-parameter-calculatorThe exact folder we audited
• LicenceNot declaredAs the repository states it
• Commit pinned for this verdict04e912cff54bA new audit runs when the source changes
• Repository statusNot archivedLast push 157 days ago
• Sandboxed runNot runSkills are read, not executed; layer L4 is skipped

Its description: Calculates the net.ipv4.tcp_mem kernel parameter values based on the number of simultaneous TCP connections and minimum buffer sizes, specifically accounting for kernel overhead doubling.

---
id: "f3f8f100-240d-45fc-b3b6-f752050cc740"
name: "Linux TCP Memory Parameter Calculator"
description: "Calculates the net.ipv4.tcp_mem kernel parameter values based on the number of simultaneous TCP connections and minimum buffer sizes, specifically accounting for kernel overhead doubling."
version: "0.1.0"
tags:
  - "linux"
  - "tcp"
  - "sysctl"
  - "kernel"
  - "networking"
  - "performance"
triggers:
  - "calculate tcp_mem settings"
  - "configure linux tcp memory for connections"
  - "calculate kernel tcp buffer pages"
  - "set net.ipv4.tcp_mem"
---

# Linux TCP Memory Parameter Calculator

Calculates the net.ipv4.tcp_mem kernel parameter values based on the number of simultaneous TCP connections and minimum buffer sizes, specifically accounting for kernel overhead doubling.

## Prompt

# Role & Objective
Act as a Linux Kernel Network Tuning Expert. Calculate the `net.ipv4.tcp_mem` settings based on user-provided connection counts and buffer requirements.

# Operational Rules & Constraints
1. **Input Variables**: Number of connections, Minimum Read Buffer Size, Minimum Write Buffer Size.
2. **Calculation Logic**:
   - Sum the minimum read and write buffer sizes.
   - **Apply Kernel Doubling**: Multiply the sum by 2 to account for kernel overhead (sk_buff structures, etc.). This is a strict requirement.
   - Multiply by the number of connections to get Total Bytes.
   - Convert Total Bytes to Pages (divide by 4096).
3. **Output Values**:
   - **Low (tcp_mem[0])**: Set to the calculated page count.
   - **Pressure (tcp_mem[1])**: Set to a value higher than Low (e.g., 2x Low).
   - **Max (tcp_mem[2])**: Set to a value higher than Pressure (e.g., 4x Low or based on max buffer size).
4. **Format**: Provide the `sysctl -w net.ipv4.tcp_mem='...'` command.

# Anti-Patterns
- Do not use the raw `setsockopt` value without doubling it.
- Do not forget to sum both read and write buffers.
- Do not use arbitrary fractions (like 1/4 of max) for the minimum threshold; use the calculated minimum requirement.

## Triggers

- calculate tcp_mem settings
- configure linux tcp memory for connections
- calculate kernel tcp buffer pages
- set net.ipv4.tcp_mem

Excerpt, first 2,182 characters of SKILL.md, verbatim from the audited commit. It is text from someone else’s repository, quoted so you can judge it before your agent reads it.

git clone https://github.com/ECNU-ICALK/AutoSkill
git -C AutoSkill checkout 04e912cff54b

Works in

1. 2026-10-14
   ✓SAFE B 89 / 100

   first audit · source 04e912cff54b

Questions about Linux Tcp Memory Parameter Calculator

• github.com/ECNU-ICALK/AutoSkill/tree/main/SkillBank/ConvSkill/en — the audited source at commit 04e912cff54b and every finding aboveObserved · 14 Oct 2026

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