count_active_contexts(9)

🌸 NAME 🌸

okay so this page is count_active_contexts(9) from the Kernel API Manual, and it does exactly what the name says, no cap: count nr of active tasks. 💅

✨ SYNOPSIS ✨

unsigned long count_active_contexts (void );

🎀 ARGUMENTS 🎀

• void — no arguments. literally none. zero. empty set. she takes nothing. 🫶

🦋 DESCRIPTION 🦋

Return the number of tasks currently running or waiting to run. that's the whole vibe check: if a task is on the CPU or queued up ready to go, it counts. 👑

Note that we don't take runq_lock / list_mutex here. Reading a single 32bit value is atomic on powerpc, and we don't care about memory ordering issues here. so yeah, no locking moment, and that's intentional. 🔥

🌈 SEE ALSO 🌈

• Kernel file: ./arch/powerpc/platforms/cell/spufs/sched.c
• spu_bind_context(9)
• spu_unbind_context(9)
• find_victim(9)
• spu_unschedule(9)
• spu_activate(9)
• grab_runnable_context(9)
• spu_deactivate(9)
• spu_yield(9)
• spu_calc_load(9)

signing off from ./arch/powerpc/platforms/cell/..., October 2026, count_active_contexts(9) — bestie, go count some contexts responsibly 💖✨