sys_perf_event_open(9)

🌸 sys_perf_event_open(9) 🌸

okay so bestie, this one is from the Kernel API Manual, and it's literally the syscall that opens a performance event and associates it to a task/cpu. no cap, that's the whole vibe. ✨

💖 NAME 💖

sys_perf_event_open — open a performance event, associate it to a task/cpu 🫶

🎀 SYNOPSIS 🎀

long sys_perf_event_open (struct perf_event_attr __user * attr_uptr ,
       pid_t pid , int cpu , int group_fd , unsigned long flags );

✨ ARGUMENTS ✨

• attr_uptr — event_id type attributes for monitoring/sampling. yes, it's giving "the whole setup package" 💅
• pid — target pid 🎯
• cpu — target cpu 🧚
• group_fd — group leader event fd 👑
• flags — perf event open flags 🌈

🔥 SEE ALSO 🔥

• Kernel file ./kernel/events/core.c 🍓
• task_function_call(9) ⭐
• cpu_function_call(9) 💜
• perf_event_create_kernel_counter(9) 🦋

xoxo, your kernel bestie 💖 — source/version: ./kernel/events, date: October 2026. periodt. 💅✨