trace_softirq_raise(9)

💅 trace_softirq_raise(9) 💅

okay so this one is from the Kernel API Manual, and it's literally the function that gets called the instant a softirq is raised. bestie, timing is the whole point 🫶

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✨ NAME ✨

trace_softirq_raise — called immediately when a softirq is raised.

that's the vibe: softirq goes up, this function is right there. 👑

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🦋 SYNOPSIS 🦋

here's the signature, copy it exactly, no freestyling:

void trace_softirq_raise (unsigned int vec_nr );

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🌸 ARGUMENTS 🌸

• vec_nr — the softirq vector number. yes ma'am, that's the number of the vector, and it's an unsigned int in the signature above. 💖

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🎀 DESCRIPTION 🎀

okay so here's the actual lore: when you use this in combination with the softirq_entry tracepoint, you can determine the softirq raise-to-run latency ✨. that's it. that's the whole flex. highkey useful for seeing how long a softirq took between being raised and running. 💅

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🔥 SEE ALSO 🔥

go peek at the kernel file ./include/trace/events/irq.h and these iconique friends:

• trace_irq_handler_entry(9)
• trace_irq_handler_exit(9)
• trace_softirq_entry(9)
• trace_softirq_exit(9)
• trace_tasklet_entry(9)
• trace_tasklet_exit(9)

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mwah 💋 this page came from ./include/trace/events, October 2026. now go trace something cute 🧚💜