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HWall Is a Promising New Hardware Monitor Built Specifically for Linux
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HWall is a new open-source, Rust-based Linux hardware monitor that combines real-time sensor readings, hardware inventory, historical charts, configurable alerts, and data export through GTK 4 and terminal interfaces.
For engineers running Linux on bare metal, HWall consolidates hardware telemetry that is normally scattered across multiple tools into a single read-only application with both GUI and terminal access. Its reliance on the existing kernel hwmon subsystem means coverage is entirely dependent on your motherboard, monitoring chip, and loaded driver modules, so usefulness varies by hardware. The built-in alerting and export capabilities make it more suitable for operational monitoring than typical one-shot diagnostic utilities.
Written by elseif from the cluster below · every claim links back to a sourceThe three things worth knowing
HWall reads sensor data from Linux's hwmon subsystem and does not load kernel modules or request elevated privileges for regular monitoring, so its coverage is bounded by what your kernel and drivers already expose.
On supported x86 systems it computes per-logical-CPU effective frequencies using APERF and MPERF counters, offering a more realistic view of actual CPU operation than requested clock speeds alone.
Historical data is retained in memory with a configurable limit up to 24 hours and can be exported as CSV or JSON Lines, but long retention combined with short sampling intervals increases processor and memory overhead.
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HWall positions itself as a unified Linux hardware monitor modeled on the hierarchical presentation style of HWiNFO64, a well-regarded Windows utility. It is written in Rust and offers both a GTK 4 graphical interface and an interactive terminal interface with Mixed, Sensors, and Hardware modes. The terminal mode can be switched interactively without leaving the application, which is useful for engineers who operate headless servers or work over SSH and still want structured telemetry without a full desktop session.
The tool pulls sensor readings from the Linux kernel's hwmon subsystem under /sys/class/hwmon and does not itself load sensor modules or request administrator privileges for routine monitoring. This means its sensor coverage is entirely determined by the motherboard, the monitoring chip, the kernel version, and the driver currently loaded. Supported modules include nct6775, it87, asus-ec-sensors, asus_wmi_sensors, w83627ehf, and f71882fg. On systems where these modules are not loaded or the hardware lacks exposed sensors, HWall will have little to report. Optional integrations such as nvidia-smi for proprietary NVIDIA GPU telemetry and dmidecode for motherboard, firmware, CPU socket, TPM, and memory module information can enrich the hardware inventory, though dmidecode may require elevated privileges.
Each sensor tracks current, minimum, maximum, and average values along with a sample count, and HWall distinguishes between stale, unavailable, and offline readings. This distinction matters operationally: a stale value indicates the last successful sample is still displayed but no longer actively updated, which helps engineers avoid misinterpreting frozen data as live telemetry. On supported x86 systems, HWall computes average and per-logical-CPU effective frequencies using APERF and MPERF counters, which can reflect actual CPU operation more accurately than the requested clock speed reported by the kernel.
Historical monitoring is retained in memory with a configurable limit, defaulting to 1 minute and extendable up to 24 hours. Interactive charts support hover inspection, zoom, pan, timestamp examination, and time-period selection. Data can be exported in CSV or JSON Lines format for downstream analysis. The trade-off is explicit in the source: short sampling intervals combined with long retention increase processor and memory usage, so engineers deploying this on resource-constrained systems need to tune those parameters carefully. The tool also exposes an HTTP API, which could enable integration with external dashboards or alerting pipelines, though the material does not describe its capabilities in detail.
Alerting is per-sensor with configurable warning and critical thresholds, including duration, hysteresis, and cooldown parameters to suppress notifications from transient spikes. Desktop notifications fire when a reading remains above a configured limit. The application operates strictly in read-only mode and does not control fans, voltages, clock frequencies, or write any values to hardware. This makes it safe to run alongside other system management tools, but it also means HWall cannot serve as a fan-control or power-management solution. Engineers who need active hardware control will need a separate tool for that purpose.
Written by elseif from the cluster below · checked for specifics the sources never containedTHE CLUSTER