Skip to content

Overview Tab

The Overview tab (tab 1) is the default landing view. It provides a real-time dashboard of key system metrics in a mactop-inspired layout with gauge blocks, info panels, and a process list.

Layout

The Overview tab uses a mactop-style layout divided into three rows:

Top row: 4 gauge blocks

  • CPU -- per-core gauges with aggregate usage and clock frequency
  • GPU / Load -- V3D clock frequency (Pi 5), load averages, GPU temperature
  • Temperature -- SoC temperature with color-coded gauge, plus PMIC/RP1/NVMe temps when available
  • Memory -- RAM and swap usage gauges with used/total display

Middle row: 4 info panels

  • Power -- total estimated wattage, input voltage, key rail readings (Pi 5 PMIC), or voltage readings (other Pi boards)
  • Board -- model name, SoC, CPU type, architecture, kernel version
  • Network -- per-interface throughput rates (RX/TX), excluding loopback
  • Disk -- partition usage with device name and mountpoint on separate lines (no /dev/ prefix)

Bottom row: process list

  • Embedded process table showing top processes by CPU usage
  • Supports the same keyboard shortcuts as the Processes tab: j/k to navigate, s to cycle sort column, K to kill

CPU gauge block

Displays real-time CPU utilization parsed from /proc/stat.

  • Per-core gauge bars show individual core utilization as percentage bars
  • Aggregate usage is the average across all cores
  • Current frequency is read from /sys/devices/system/cpu/cpufreq/

Color coding

Color Meaning
Green Below warning threshold (default: < 60%)
Yellow At or above warning threshold (default: >= 60%)
Red At or above critical threshold (default: >= 85%)

Memory gauge block

Shows RAM and swap usage parsed from /proc/meminfo.

  • RAM gauge displays used / total and percentage
  • Swap gauge displays used / total and percentage (hidden if no swap is configured)

Color coding

Color Meaning
Green Below warning threshold (default: < 70% RAM, < 25% swap)
Yellow At or above warning (default: >= 70% RAM, >= 25% swap)
Red At or above critical (default: >= 90% RAM, >= 50% swap)

Temperature gauge block

Displays SoC temperature from thermal zones in /sys/class/thermal/.

  • Temperature gauge with color-coded reading in degrees Celsius

On Pi 5, additional thermal zones may appear for the PMIC, RP1 southbridge, and NVMe drives (discovered via hwmon).

Color coding

Color Meaning
Green Below 60C
Yellow 60C -- 74C (warning range)
Red 75C+ (critical)

Throttling

If the SoC temperature reaches the critical threshold, the Pi firmware may throttle the CPU to reduce heat. Check the throttle indicator in the header bar.

Network info panel

Shows per-interface throughput rates parsed from /proc/net/dev.

  • Download rate (RX bytes/sec) for each interface
  • Upload rate (TX bytes/sec) for each interface

The loopback interface (lo) is filtered out by default.

Disk info panel

Shows partition usage with device names and mountpoints.

  • Device name shown without the /dev/ prefix (e.g., sda1 instead of /dev/sda1)
  • Mountpoint displayed on a separate line below the device name
  • Usage percentage with color-coded gauge

Power info panel

Shows power and voltage readings collected in real time on the Overview tab:

  • Pi 5: Total estimated wattage, input voltage (EXT5V_V), and key PMIC rail readings
  • Pi 4B and other boards: Core and SDRAM voltage readings via vcgencmd measure_volts

Note

Power/voltage data is collected on the Overview tab as well as the Power tab, so you can monitor power draw without switching tabs.

Board info panel

Shows hardware identification:

  • Board model and SoC name
  • CPU type with core names mapped from ARM CPU part numbers (e.g., Cortex-A76)
  • Architecture and kernel version

GPU / Load gauge block

Displays GPU and system load data:

  • V3D clock frequency in MHz on Pi 5 (from vcgencmd measure_clock v3d), or core clock on other boards
  • GPU memory shown as "Shared" on Pi 5 (which uses shared system memory), or allocation in MB on other boards
  • GPU temperature in Celsius (from vcgencmd measure_temp)
  • Codec status: shows "Hardware HEVC (BCM2712)" on Pi 5 instead of disabled codec marks
  • Load averages (1, 5, 15 minute)

Note

GPU data is only available on Raspberry Pi boards with vcgencmd installed. On other systems, this section is hidden.

Throttle indicator

The header bar shows a throttle status indicator:

  • Green -- no throttle events detected
  • Yellow -- throttle events occurred in the past but are not currently active
  • Red -- active throttling is occurring right now

Throttle data comes from vcgencmd get_throttled, which reports a bitmask covering under-voltage, frequency capping, and thermal throttling.