wtop

CPU

Per-core utilisation bars in a compact grid. Colour-coded green → yellow → red as load climbs. Aggregate total always pinned at the bottom.

Memory

RAM and swap in GiB with htop-style colour layering — used, cached, and buffered pages each in a distinct colour so you know exactly where memory is going.

GPU

Automatic detection: full telemetry (util, VRAM, temp, power, clocks, fan, P-state) from NVIDIA via in-process NVML with zero subprocess overhead (falling back to DXGI, PDH, or nvidia-smi), or utilisation from AMD/Intel via PDH.

Network

Per-interface send/receive rates in real time via direct GetIfTable2. Loopback and zero-traffic interfaces hidden automatically. Delta-per-second calculation handles clock resets cleanly.

Process list

High-performance native single-syscall Windows NT query. Top processes sortable by CPU%, memory, PID, name, or disk read/write. Toggle an htop-style tree view (t) to see full parent → child relationships with box-drawing connectors across the entire system. Kill any selected process with a confirmation step.

A ◆ marks wtop itself and the terminal session hosting it — the shells and terminal host above it — so the monitor's own cost is visible and your session is hard to kill by accident. Those processes stay pinned in the list even when idle. The chain stops below the session root: explorer.exe parents nearly everything interactive, so marking it would say nothing.

Per-process disk I/O

DISK R and DISK W columns show what each process is actually reading and writing, and the list sorts by either. The transfer counters arrive in the same single system call that already collects the process list, so the columns cost no additional syscalls. They appear once the terminal is 120 columns wide.

Battery, uptime & clock

The status bar carries AC or battery state, charge, estimated time remaining and battery-saver mode, plus system uptime and the true effective CPU clock including turbo. On a desktop with no battery the power field is omitted rather than left blank. The fields thin out in priority order as the terminal narrows — the charge state is the last of them to go.

Disk

Per-physical-disk read and write throughput with a busy percentage, straight from PDH, plus a capacity bar for every fixed volume. Virtual filesystems that present themselves as fixed drives — Google Drive mirrors the system drive’s exact size — are reconciled away against the real physical disks, so no phantom copy of C: appears.

Web search

? looks the selected process up in your default browser, on whatever search engine that browser is actually set to — read out of the browser’s own profile, so a Chrome or Edge switched to DuckDuckGo searches DuckDuckGo rather than Google or Bing.

A child process is searched together with its nearest differently-named ancestor for context, so a bare msedgewebview2.exe becomes GoogleDriveFS.exe msedgewebview2.exe and you find out which application is really hosting it.

Zero dependencies

Single statically-linked binary with no installer, no runtime, and no admin rights to run. CGO-free. Just download wtop.exe and go.