[RFC PATCH 1/5] trace: Add trace_ipi_send_{cpu, cpumask}
From: Valentin Schneider <vschneid@redhat.com>
Date: 2022-10-07 15:46:10
Also in:
linux-alpha, linux-mips, linux-riscv, linux-s390, linux-sh, linuxppc-dev, lkml, loongarch, sparclinux
Subsystem:
the rest, tracing · Maintainers:
Linus Torvalds, Steven Rostedt, Masami Hiramatsu
trace_ipi_raise is unsuitable for generically tracing IPI sources; add a variant of it that takes a callsite and a CPU. Define a macro helper for handling IPIs sent to multiple CPUs. Signed-off-by: Valentin Schneider <vschneid@redhat.com> --- include/trace/events/ipi.h | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+)
diff --git a/include/trace/events/ipi.h b/include/trace/events/ipi.h
index 0be71dad6ec0..fd2f2aeb36fe 100644
--- a/include/trace/events/ipi.h
+++ b/include/trace/events/ipi.h@@ -35,6 +35,33 @@ TRACE_EVENT(ipi_raise, TP_printk("target_mask=%s (%s)", __get_bitmask(target_cpus), __entry->reason) ); +TRACE_EVENT(ipi_send_cpu, + + TP_PROTO(unsigned long callsite, unsigned int cpu), + + TP_ARGS(callsite, cpu), + + TP_STRUCT__entry( + __field(unsigned long, callsite) + __field(unsigned int, cpu) + ), + + TP_fast_assign( + __entry->callsite = callsite; + __entry->cpu = cpu; + ), + + TP_printk("callsite=%pS target_cpu=%d", (void *)__entry->callsite, __entry->cpu) +); + +#define trace_ipi_send_cpumask(callsite, mask) do { \ + if (static_key_false(&__tracepoint_ipi_send_cpu.key)) { \ + int cpu; \ + for_each_cpu(cpu, mask) \ + trace_ipi_send_cpu(callsite, cpu); \ + } \ +} while (0) + DECLARE_EVENT_CLASS(ipi_handler, TP_PROTO(const char *reason),
--
2.31.1
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