67178767b9
Lockdep events subsystem gathers various locking related events such as a request, release, contention or acquisition of a lock. The name of this event subsystem is a bit of a misnomer since these events are not quite related to lockdep but more generally to locking, ie: these events are not reporting lock dependencies or possible deadlock scenario but pure locking events. Hence this rename. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Acked-by: Peter Zijlstra <peterz@infradead.org> Acked-by: Hitoshi Mitake <mitake@dcl.info.waseda.ac.jp> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Li Zefan <lizf@cn.fujitsu.com> LKML-Reference: <1258103194-843-1-git-send-email-fweisbec@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
97 lines
1.9 KiB
C
97 lines
1.9 KiB
C
#undef TRACE_SYSTEM
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#define TRACE_SYSTEM lock
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#if !defined(_TRACE_LOCK_H) || defined(TRACE_HEADER_MULTI_READ)
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#define _TRACE_LOCK_H
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#include <linux/lockdep.h>
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#include <linux/tracepoint.h>
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#ifdef CONFIG_LOCKDEP
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TRACE_EVENT(lock_acquire,
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TP_PROTO(struct lockdep_map *lock, unsigned int subclass,
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int trylock, int read, int check,
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struct lockdep_map *next_lock, unsigned long ip),
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TP_ARGS(lock, subclass, trylock, read, check, next_lock, ip),
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TP_STRUCT__entry(
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__field(unsigned int, flags)
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__string(name, lock->name)
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),
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TP_fast_assign(
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__entry->flags = (trylock ? 1 : 0) | (read ? 2 : 0);
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__assign_str(name, lock->name);
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),
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TP_printk("%s%s%s", (__entry->flags & 1) ? "try " : "",
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(__entry->flags & 2) ? "read " : "",
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__get_str(name))
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);
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TRACE_EVENT(lock_release,
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TP_PROTO(struct lockdep_map *lock, int nested, unsigned long ip),
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TP_ARGS(lock, nested, ip),
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TP_STRUCT__entry(
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__string(name, lock->name)
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),
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TP_fast_assign(
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__assign_str(name, lock->name);
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),
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TP_printk("%s", __get_str(name))
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);
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#ifdef CONFIG_LOCK_STAT
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TRACE_EVENT(lock_contended,
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TP_PROTO(struct lockdep_map *lock, unsigned long ip),
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TP_ARGS(lock, ip),
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TP_STRUCT__entry(
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__string(name, lock->name)
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),
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TP_fast_assign(
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__assign_str(name, lock->name);
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),
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TP_printk("%s", __get_str(name))
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);
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TRACE_EVENT(lock_acquired,
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TP_PROTO(struct lockdep_map *lock, unsigned long ip, s64 waittime),
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TP_ARGS(lock, ip, waittime),
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TP_STRUCT__entry(
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__string(name, lock->name)
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__field(unsigned long, wait_usec)
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__field(unsigned long, wait_nsec_rem)
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),
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TP_fast_assign(
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__assign_str(name, lock->name);
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__entry->wait_nsec_rem = do_div(waittime, NSEC_PER_USEC);
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__entry->wait_usec = (unsigned long) waittime;
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),
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TP_printk("%s (%lu.%03lu us)", __get_str(name), __entry->wait_usec,
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__entry->wait_nsec_rem)
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);
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#endif
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#endif
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#endif /* _TRACE_LOCK_H */
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/* This part must be outside protection */
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#include <trace/define_trace.h>
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