trace: sched: add new trace events for tracking migrations

This patch adds some new traces which can help during load balance
and/or migration investigations.

Signed-off-by: Lukasz Luba <l.luba@partner.samsung.com>

diff --git a/include/trace/events/sched.h b/include/trace/events/sched.h
index 79d3af7e627eaa7ea5fe17a8a167361a5974d946..a251458d2a27d798cb8052ec6efc9813823e6167 100644 (file)
--- a/include/trace/events/sched.h
+++ b/include/trace/events/sched.h
@@ -777,6 +777,114 @@ TRACE_EVENT(sched_util_est_cpu,
                  __entry->util_avg,
                  __entry->util_est_runnable)
 );
+
+
+TRACE_EVENT(sched_active_lb_stop_cpu,
+
+       TP_PROTO(int busiest_cpu, int target_cpu),
+
+       TP_ARGS(busiest_cpu, target_cpu),
+
+       TP_STRUCT__entry(
+               __field(        int,    busiest_cpu     )
+               __field(        int,    target_cpu      )
+       ),
+
+       TP_fast_assign(
+               __entry->busiest_cpu    = busiest_cpu;
+               __entry->target_cpu     = target_cpu;
+       ),
+
+       TP_printk("busiest_cpu=%d target_cpu=%d",
+                 __entry->busiest_cpu,
+                 __entry->target_cpu)
+);
+
+TRACE_EVENT(sched_can_migrate_task,
+
+       TP_PROTO(int pid, int migrate, int task_hot, int busiest_cpu, int target_cpu),
+
+       TP_ARGS(pid, migrate, task_hot, busiest_cpu, target_cpu),
+
+       TP_STRUCT__entry(
+               __field(        int,    pid             )
+               __field(        int,    migrate         )
+               __field(        int,    task_hot        )
+               __field(        int,    busiest_cpu     )
+               __field(        int,    target_cpu      )
+       ),
+
+       TP_fast_assign(
+               __entry->pid            = pid;
+               __entry->migrate        = migrate;
+               __entry->task_hot       = task_hot;
+               __entry->busiest_cpu    = busiest_cpu;
+               __entry->target_cpu     = target_cpu;
+       ),
+
+       TP_printk("pid=%d migrate=%d task_hot=%d src_cpu=%d dst_cpu=%d",
+                 __entry->pid,
+                 __entry->migrate,
+                 __entry->task_hot,
+                 __entry->busiest_cpu,
+                 __entry->target_cpu)
+);
+
+TRACE_EVENT(sched_migrate_capacity_comparison,
+
+       TP_PROTO(int src_cpu, int dst_cpu, int src_cpu_cap, int dst_cpu_cap,
+                int src_cpu_util, int dst_cpu_util, int needed),
+
+       TP_ARGS(src_cpu, dst_cpu, src_cpu_cap, dst_cpu_cap, src_cpu_util,
+               dst_cpu_util, needed),
+
+       TP_STRUCT__entry(
+               __field(        int,    src_cpu         )
+               __field(        int,    dst_cpu         )
+               __field(        int,    src_cpu_cap     )
+               __field(        int,    dst_cpu_cap     )
+               __field(        int,    src_cpu_util    )
+               __field(        int,    dst_cpu_util    )
+               __field(        int,    needed          )
+       ),
+
+       TP_fast_assign(
+               __entry->src_cpu        = src_cpu;
+               __entry->dst_cpu        = dst_cpu;
+               __entry->src_cpu_cap    = src_cpu_cap;
+               __entry->dst_cpu_cap    = dst_cpu_cap;
+               __entry->src_cpu_util   = src_cpu_util;
+               __entry->dst_cpu_util   = dst_cpu_util;
+               __entry->needed         = needed;
+       ),
+
+       TP_printk("src_cpu=%d dst_cpu=%d src_cpu_cap=%d dst_cpu_cap=%d src_cpu_util=%d dst_cpu_util=%d needed=%d",
+               __entry->src_cpu,
+               __entry->dst_cpu,
+               __entry->src_cpu_cap,
+               __entry->dst_cpu_cap,
+               __entry->src_cpu_util,
+               __entry->dst_cpu_util,
+               __entry->needed)
+);
+
+TRACE_EVENT(sched_need_active_balance,
+
+       TP_PROTO(int needed),
+
+       TP_ARGS(needed),
+
+       TP_STRUCT__entry(
+               __field(        int,    needed  )
+       ),
+
+       TP_fast_assign(
+               __entry->needed = needed;
+       ),
+
+       TP_printk("needed=%d", __entry->needed)
+);
+
 #endif /* CONFIG_SMP */
 #endif /* _TRACE_SCHED_H */