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authorCong Wang <xiyou.wangcong@gmail.com>2020-05-26 21:35:25 -0700
committerDavid S. Miller <davem@davemloft.net>2020-05-27 15:05:49 -0700
commitf5a7833e83628f18c1ee94e6ffcb1d232f029be9 (patch)
tree744de84947c3dab8440aecda9c93f536e3437b3b /include/trace
parentnet_sched: add tracepoints for qdisc_reset() and qdisc_destroy() (diff)
downloadwireguard-linux-f5a7833e83628f18c1ee94e6ffcb1d232f029be9.tar.xz
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net_sched: add a tracepoint for qdisc creation
With this tracepoint, we could know when qdisc's are created, especially those default qdisc's. Sample output: tc-736 [001] ...1 56.230107: qdisc_create: dev=ens3 kind=pfifo parent=1:0 tc-736 [001] ...1 56.230113: qdisc_create: dev=ens3 kind=hfsc parent=ffff:ffff tc-738 [001] ...1 56.256816: qdisc_create: dev=ens3 kind=pfifo parent=1:100 tc-739 [001] ...1 56.267584: qdisc_create: dev=ens3 kind=pfifo parent=1:200 tc-740 [001] ...1 56.279649: qdisc_create: dev=ens3 kind=fq_codel parent=1:100 tc-741 [001] ...1 56.289996: qdisc_create: dev=ens3 kind=pfifo_fast parent=1:200 tc-745 [000] .N.1 111.687483: qdisc_create: dev=ens3 kind=ingress parent=ffff:fff1 Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: Jiri Pirko <jiri@resnulli.us> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/trace')
-rw-r--r--include/trace/events/qdisc.h23
1 files changed, 23 insertions, 0 deletions
diff --git a/include/trace/events/qdisc.h b/include/trace/events/qdisc.h
index 2b948801afa3..330d32d84485 100644
--- a/include/trace/events/qdisc.h
+++ b/include/trace/events/qdisc.h
@@ -96,6 +96,29 @@ TRACE_EVENT(qdisc_destroy,
TC_H_MAJ(__entry->handle) >> 16, TC_H_MIN(__entry->handle))
);
+TRACE_EVENT(qdisc_create,
+
+ TP_PROTO(const struct Qdisc_ops *ops, struct net_device *dev, u32 parent),
+
+ TP_ARGS(ops, dev, parent),
+
+ TP_STRUCT__entry(
+ __string( dev, dev->name )
+ __string( kind, ops->id )
+ __field( u32, parent )
+ ),
+
+ TP_fast_assign(
+ __assign_str(dev, dev->name);
+ __assign_str(kind, ops->id);
+ __entry->parent = parent;
+ ),
+
+ TP_printk("dev=%s kind=%s parent=%x:%x",
+ __get_str(dev), __get_str(kind),
+ TC_H_MAJ(__entry->parent) >> 16, TC_H_MIN(__entry->parent))
+);
+
#endif /* _TRACE_QDISC_H */
/* This part must be outside protection */