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| author | Peter Zijlstra <peterz@infradead.org> | 2023-03-22 11:28:36 +0100 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2023-03-24 11:01:29 +0100 |
| commit | 68e2d17c9eb311ab59aeb6d0c38aad8985fa2596 (patch) | |
| tree | 4ad1d55f8685fc2cbb6f76bffc0c35084e89d201 /include | |
| parent | 68f4ff04dbada18dad79659c266a8e5e29e458cd (diff) | |
| download | lwn-68e2d17c9eb311ab59aeb6d0c38aad8985fa2596.tar.gz lwn-68e2d17c9eb311ab59aeb6d0c38aad8985fa2596.zip | |
trace: Add trace_ipi_send_cpu()
Because copying cpumasks around when targeting a single CPU is a bit
daft...
Tested-and-reviewed-by: Valentin Schneider <vschneid@redhat.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20230322103004.GA571242%40hirez.programming.kicks-ass.net
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/smp.h | 6 | ||||
| -rw-r--r-- | include/trace/events/ipi.h | 22 |
2 files changed, 25 insertions, 3 deletions
diff --git a/include/linux/smp.h b/include/linux/smp.h index c036a2228d8d..ed8f344ba627 100644 --- a/include/linux/smp.h +++ b/include/linux/smp.h @@ -130,9 +130,9 @@ extern void arch_smp_send_reschedule(int cpu); * scheduler_ipi() is inline so can't be passed as callback reason, but the * callsite IP should be sufficient for root-causing IPIs sent from here. */ -#define smp_send_reschedule(cpu) ({ \ - trace_ipi_send_cpumask(cpumask_of(cpu), _RET_IP_, NULL); \ - arch_smp_send_reschedule(cpu); \ +#define smp_send_reschedule(cpu) ({ \ + trace_ipi_send_cpu(cpu, _RET_IP_, NULL); \ + arch_smp_send_reschedule(cpu); \ }) /* diff --git a/include/trace/events/ipi.h b/include/trace/events/ipi.h index b1125dc27682..3de9bfc982ce 100644 --- a/include/trace/events/ipi.h +++ b/include/trace/events/ipi.h @@ -35,6 +35,28 @@ TRACE_EVENT(ipi_raise, TP_printk("target_mask=%s (%s)", __get_bitmask(target_cpus), __entry->reason) ); +TRACE_EVENT(ipi_send_cpu, + + TP_PROTO(const unsigned int cpu, unsigned long callsite, void *callback), + + TP_ARGS(cpu, callsite, callback), + + TP_STRUCT__entry( + __field(unsigned int, cpu) + __field(void *, callsite) + __field(void *, callback) + ), + + TP_fast_assign( + __entry->cpu = cpu; + __entry->callsite = (void *)callsite; + __entry->callback = callback; + ), + + TP_printk("cpu=%u callsite=%pS callback=%pS", + __entry->cpu, __entry->callsite, __entry->callback) +); + TRACE_EVENT(ipi_send_cpumask, TP_PROTO(const struct cpumask *cpumask, unsigned long callsite, void *callback), |