Messages in this thread Patch in this message | | | From | Qais Yousef <> | Subject | [PATCH v3 6/6] sched: export the newly added tracepoints | Date | Tue, 4 Jun 2019 12:14:59 +0100 |
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So that external modules can hook into them and extract the info they need. Since these new tracepoints have no events associated with them exporting these tracepoints make them useful for external modules to perform testing and debugging. There's no other way otherwise to access them.
BPF doesn't have infrastructure to access these bare tracepoints either.
Signed-off-by: Qais Yousef <qais.yousef@arm.com> --- kernel/sched/core.c | 11 +++++++++++ 1 file changed, 11 insertions(+)
diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 874c427742a9..bc831d913088 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -23,6 +23,17 @@ #define CREATE_TRACE_POINTS #include <trace/events/sched.h> +/* + * Export tracepoints that act as a bare tracehook (ie: have no trace event + * associated with them) to allow external modules to probe them. + */ +EXPORT_TRACEPOINT_SYMBOL_GPL(pelt_cfs_tp); +EXPORT_TRACEPOINT_SYMBOL_GPL(pelt_rt_tp); +EXPORT_TRACEPOINT_SYMBOL_GPL(pelt_dl_tp); +EXPORT_TRACEPOINT_SYMBOL_GPL(pelt_irq_tp); +EXPORT_TRACEPOINT_SYMBOL_GPL(pelt_se_tp); +EXPORT_TRACEPOINT_SYMBOL_GPL(sched_overutilized_tp); + DEFINE_PER_CPU_SHARED_ALIGNED(struct rq, runqueues); #if defined(CONFIG_SCHED_DEBUG) && defined(CONFIG_JUMP_LABEL) -- 2.17.1
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