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authorTejun Heo <tj@kernel.org>2016-08-10 11:23:44 -0400
committerTejun Heo <tj@kernel.org>2016-08-10 11:23:44 -0400
commited1777de25e45bfb58fad63341904f8a77911785 (patch)
treee7fb66fbbcee5c7fa0bde752bd6ecf44e65b4d1c /include/trace
parent4c737b41de7f4eef2a593803bad1b918dd718b10 (diff)
cgroup: add tracepoints for basic operations
Debugging what goes wrong with cgroup setup can get hairy. Add tracepoints for cgroup hierarchy mount, cgroup creation/destruction and task migration operations for better visibility. Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'include/trace')
-rw-r--r--include/trace/events/cgroup.h163
1 files changed, 163 insertions, 0 deletions
diff --git a/include/trace/events/cgroup.h b/include/trace/events/cgroup.h
new file mode 100644
index 000000000000..ab68640a18d0
--- /dev/null
+++ b/include/trace/events/cgroup.h
@@ -0,0 +1,163 @@
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM cgroup
+
+#if !defined(_TRACE_CGROUP_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _TRACE_CGROUP_H
+
+#include <linux/cgroup.h>
+#include <linux/tracepoint.h>
+
+DECLARE_EVENT_CLASS(cgroup_root,
+
+ TP_PROTO(struct cgroup_root *root),
+
+ TP_ARGS(root),
+
+ TP_STRUCT__entry(
+ __field( int, root )
+ __field( u16, ss_mask )
+ __string( name, root->name )
+ ),
+
+ TP_fast_assign(
+ __entry->root = root->hierarchy_id;
+ __entry->ss_mask = root->subsys_mask;
+ __assign_str(name, root->name);
+ ),
+
+ TP_printk("root=%d ss_mask=%#x name=%s",
+ __entry->root, __entry->ss_mask, __get_str(name))
+);
+
+DEFINE_EVENT(cgroup_root, cgroup_setup_root,
+
+ TP_PROTO(struct cgroup_root *root),
+
+ TP_ARGS(root)
+);
+
+DEFINE_EVENT(cgroup_root, cgroup_destroy_root,
+
+ TP_PROTO(struct cgroup_root *root),
+
+ TP_ARGS(root)
+);
+
+DEFINE_EVENT(cgroup_root, cgroup_remount,
+
+ TP_PROTO(struct cgroup_root *root),
+
+ TP_ARGS(root)
+);
+
+DECLARE_EVENT_CLASS(cgroup,
+
+ TP_PROTO(struct cgroup *cgrp),
+
+ TP_ARGS(cgrp),
+
+ TP_STRUCT__entry(
+ __field( int, root )
+ __field( int, id )
+ __field( int, level )
+ __dynamic_array(char, path,
+ cgrp->kn ? cgroup_path(cgrp, NULL, 0) + 1
+ : strlen("(null)"))
+ ),
+
+ TP_fast_assign(
+ __entry->root = cgrp->root->hierarchy_id;
+ __entry->id = cgrp->id;
+ __entry->level = cgrp->level;
+ if (cgrp->kn)
+ cgroup_path(cgrp, __get_dynamic_array(path),
+ __get_dynamic_array_len(path));
+ else
+ __assign_str(path, "(null)");
+ ),
+
+ TP_printk("root=%d id=%d level=%d path=%s",
+ __entry->root, __entry->id, __entry->level, __get_str(path))
+);
+
+DEFINE_EVENT(cgroup, cgroup_mkdir,
+
+ TP_PROTO(struct cgroup *cgroup),
+
+ TP_ARGS(cgroup)
+);
+
+DEFINE_EVENT(cgroup, cgroup_rmdir,
+
+ TP_PROTO(struct cgroup *cgroup),
+
+ TP_ARGS(cgroup)
+);
+
+DEFINE_EVENT(cgroup, cgroup_release,
+
+ TP_PROTO(struct cgroup *cgroup),
+
+ TP_ARGS(cgroup)
+);
+
+DEFINE_EVENT(cgroup, cgroup_rename,
+
+ TP_PROTO(struct cgroup *cgroup),
+
+ TP_ARGS(cgroup)
+);
+
+DECLARE_EVENT_CLASS(cgroup_migrate,
+
+ TP_PROTO(struct cgroup *dst_cgrp, struct task_struct *task, bool threadgroup),
+
+ TP_ARGS(dst_cgrp, task, threadgroup),
+
+ TP_STRUCT__entry(
+ __field( int, dst_root )
+ __field( int, dst_id )
+ __field( int, dst_level )
+ __dynamic_array(char, dst_path,
+ dst_cgrp->kn ? cgroup_path(dst_cgrp, NULL, 0) + 1
+ : strlen("(null)"))
+ __field( int, pid )
+ __string( comm, task->comm )
+ ),
+
+ TP_fast_assign(
+ __entry->dst_root = dst_cgrp->root->hierarchy_id;
+ __entry->dst_id = dst_cgrp->id;
+ __entry->dst_level = dst_cgrp->level;
+ if (dst_cgrp->kn)
+ cgroup_path(dst_cgrp, __get_dynamic_array(dst_path),
+ __get_dynamic_array_len(dst_path));
+ else
+ __assign_str(dst_path, "(null)");
+ __entry->pid = task->pid;
+ __assign_str(comm, task->comm);
+ ),
+
+ TP_printk("dst_root=%d dst_id=%d dst_level=%d dst_path=%s pid=%d comm=%s",
+ __entry->dst_root, __entry->dst_id, __entry->dst_level,
+ __get_str(dst_path), __entry->pid, __get_str(comm))
+);
+
+DEFINE_EVENT(cgroup_migrate, cgroup_attach_task,
+
+ TP_PROTO(struct cgroup *dst_cgrp, struct task_struct *task, bool threadgroup),
+
+ TP_ARGS(dst_cgrp, task, threadgroup)
+);
+
+DEFINE_EVENT(cgroup_migrate, cgroup_transfer_tasks,
+
+ TP_PROTO(struct cgroup *dst_cgrp, struct task_struct *task, bool threadgroup),
+
+ TP_ARGS(dst_cgrp, task, threadgroup)
+);
+
+#endif /* _TRACE_CGROUP_H */
+
+/* This part must be outside protection */
+#include <trace/define_trace.h>