+ Kernel DNA renders the running Linux kernel and its processes as a double-helix strand.
+ Each bead on the strand is a live telemetry sample — CPU, memory, I/O, context
+ switches and syscall activity — and "mutations" appear where behavior deviates
+ from the learned baseline. It turns the abstract state of the kernel into an organism
+ you can watch evolve in real time, driven by real counters from /proc and the process
+ table.
+
+
The Machine-Learning Anomaly Pipeline
+
+
EWMA + z-score baselining — an exponentially weighted moving average learns the normal range of each feature; deviations are scored as z-scores.
+
Isolation Forest — an unsupervised model that isolates rare multi-dimensional feature combinations as anomalies.
+
Concept-drift detection — the system watches the feature distribution over time and triggers automatic retraining when the workload shifts.
+
STIDE syscall n-grams — sequences of system calls are modeled as n-grams so that unusual syscall patterns (a classic intrusion signal) light up.
+
+
Why Visualize Kernel Behavior
+
+ Anomaly detection at the kernel boundary (ring 0) is central to Linux security and
+ observability. Understanding how syscall patterns, process lineage and resource usage
+ form a behavioral fingerprint helps reason about the wider Linux architecture and kernel
+ architecture: where intrusions, crypto-miners or misbehaving services first become
+ visible. Kernel DNA is the front-end of that pipeline — the same statistics that
+ power drift detection and retraining, made visible.
+
Linux Device Subsystem — Device Model, sysfs & Drivers
+
+
The Linux Device Model
+
+ This page visualizes the Linux device subsystem — the unified device model that
+ the kernel uses to represent every piece of hardware. At its core are kobjects and
+ ksets, organized into buses (PCI, USB, platform), device classes and drivers. The model
+ is exported to userspace through sysfs (/sys), and udev listens for hotplug uevents to
+ create device nodes and apply rules. The visualization is driven by real device
+ telemetry.
+
+
Device Subsystem Concepts
+
+
Device model — kobject/kset reference-counted objects that form the /sys hierarchy of devices, buses and classes.
+
Buses — PCI, USB, platform and virtual buses that enumerate devices and match them to drivers.
+
Driver binding — the probe/remove lifecycle that attaches a driver to a matching device.
+
sysfs — the in-memory filesystem at /sys that exposes device attributes and topology to userspace.
+
udev + hotplug — uevents from the kernel drive device-node creation, permissions and naming.
+
Device classes — block, character and network devices, plus input, sound and GPU classes.
+
+
Kernel Architecture Context
+
+ The device subsystem is the bridge between the Linux kernel and physical hardware,
+ sitting beneath the filesystem and network subsystems that ultimately depend on block
+ and network devices. Understanding the device model — kobjects, buses, sysfs and
+ driver binding — is a key part of the overall Linux architecture and kernel
+ architecture: how hardware is discovered, named and made available to the rest of the
+ system.
+
Linux Filesystem Kernel Subsystem — Architecture & Write Path
+
+
The Write Path Through the Linux Filesystem Architecture
+
+ This page visualizes the Linux filesystem architecture as a live write path from
+ userspace to persistent storage. When an application calls write(), the Virtual File
+ System (VFS) dispatches the operation to a concrete filesystem such as ext4. Data first
+ lands in the page cache as dirty pages; the kernel later flushes those pages via
+ writeback, throttling writers with balance_dirty_pages when dirty memory approaches the
+ configured ratios. Flushed blocks pass through the block layer and an I/O scheduler,
+ are journaled by jbd2 for crash consistency, and are finally written to the device.
+ The visualization is driven by real kernel counters from /proc and /sys.
+
+
Filesystem Layers
+
+
VFS — the virtual filesystem: inodes, dentries, the file and superblock objects, and the common syscall interface (open, read, write, stat).
+
Page cache — cached file pages, dirty-page accounting and read-ahead.
+
Writeback — dirty-page flushing, dirty_ratio/dirty_background_ratio thresholds and balance_dirty_pages throttling.
+
Block / IO scheduler — the bio/request layer, merging and the active I/O scheduler (mq-deadline, BFQ, none).
+
ext4 — inodes, extent trees mapping logical file blocks to physical device blocks, and block groups.
+
jbd2 journaling — the transaction lifecycle (running, committing, checkpoint) that guarantees crash consistency and durability.
+
dentry cache — path resolution component-by-component, with cached and negative dentries kept on an LRU.
+
+
Kernel Architecture Context
+
+ The filesystem is one of the core Linux kernel subsystems, sitting between the process
+ and memory subsystems above and the block device drivers below. Understanding the
+ filesystem architecture — VFS abstraction, page cache, writeback and journaling
+ — is central to reasoning about the overall Linux architecture and kernel
+ architecture: how data durability, I/O latency and memory pressure interact.
+