Under the hoodTier: how much it should matter to you
2Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
TelemetryArea: what it touches
Internal ChangesKind: in v2.1.265,
Internal ChangesSection of the release
What
The telemetry that reports CPU usage broken down by session phase (tengu_tool_cpu_by_phase) now reads CPU accounting data from a fixed cgroup path, /sys/fs/cgroup/cpuacct, plus a per-tool cgroup's cpuacct.usage file. It also adds a new *_shell_cpu_ms metric, reported alongside the existing *_wall_ms, *_cli_cpu_ms, and *_tools_cpu_ms metrics when shell cgroup data is available.
Why
This gives more precise, directly-read CPU accounting and adds visibility specifically into CPU time spent in shell subprocesses, on top of the existing CLI-versus-tools breakdown.
