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author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2009-07-21 17:34:57 +0200 |
---|---|---|
committer | Ingo Molnar <mingo@elte.hu> | 2009-08-09 12:47:25 +0200 |
commit | 3a6593050fbd8bbcaed3a44d01c31d907315c86c (patch) | |
tree | 5bbaa0015ed0b0986146cc6fa9390f559bcb66b1 /include/trace | |
parent | e3560336be655c6791316482fe288b119f34c427 (diff) | |
download | linux-3.10-3a6593050fbd8bbcaed3a44d01c31d907315c86c.tar.gz linux-3.10-3a6593050fbd8bbcaed3a44d01c31d907315c86c.tar.bz2 linux-3.10-3a6593050fbd8bbcaed3a44d01c31d907315c86c.zip |
perf_counter, ftrace: Fix perf_counter integration
Adds possible second part to the assign argument of TP_EVENT().
TP_perf_assign(
__perf_count(foo);
__perf_addr(bar);
)
Which, when specified make the swcounter increment with @foo instead
of the usual 1, and report @bar for PERF_SAMPLE_ADDR (data address
associated with the event) when this triggers a counter overflow.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jason Baron <jbaron@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include/trace')
-rw-r--r-- | include/trace/ftrace.h | 110 |
1 files changed, 85 insertions, 25 deletions
diff --git a/include/trace/ftrace.h b/include/trace/ftrace.h index 1867553c61e..fec71f8dbc4 100644 --- a/include/trace/ftrace.h +++ b/include/trace/ftrace.h @@ -144,6 +144,9 @@ #undef TP_fast_assign #define TP_fast_assign(args...) args +#undef TP_perf_assign +#define TP_perf_assign(args...) + #undef TRACE_EVENT #define TRACE_EVENT(call, proto, args, tstruct, func, print) \ static int \ @@ -345,6 +348,88 @@ static inline int ftrace_get_offsets_##call( \ #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) +#ifdef CONFIG_EVENT_PROFILE + +/* + * Generate the functions needed for tracepoint perf_counter support. + * + * static void ftrace_profile_<call>(proto) + * { + * extern void perf_tpcounter_event(int, u64, u64); + * u64 __addr = 0, __count = 1; + * + * <assign> <-- here we expand the TP_perf_assign() macro + * + * perf_tpcounter_event(event_<call>.id, __addr, __count); + * } + * + * static int ftrace_profile_enable_<call>(struct ftrace_event_call *event_call) + * { + * int ret = 0; + * + * if (!atomic_inc_return(&event_call->profile_count)) + * ret = register_trace_<call>(ftrace_profile_<call>); + * + * return ret; + * } + * + * static void ftrace_profile_disable_<call>(struct ftrace_event_call *event_call) + * { + * if (atomic_add_negative(-1, &event->call->profile_count)) + * unregister_trace_<call>(ftrace_profile_<call>); + * } + * + */ + +#undef TP_fast_assign +#define TP_fast_assign(args...) + +#undef TP_perf_assign +#define TP_perf_assign(args...) args + +#undef __perf_addr +#define __perf_addr(a) __addr = (a) + +#undef __perf_count +#define __perf_count(c) __count = (c) + +#undef TRACE_EVENT +#define TRACE_EVENT(call, proto, args, tstruct, assign, print) \ + \ +static void ftrace_profile_##call(proto) \ +{ \ + extern void perf_tpcounter_event(int, u64, u64); \ + u64 __addr = 0, __count = 1; \ + { assign; } \ + perf_tpcounter_event(event_##call.id, __addr, __count); \ +} \ + \ +static int ftrace_profile_enable_##call(struct ftrace_event_call *event_call) \ +{ \ + int ret = 0; \ + \ + if (!atomic_inc_return(&event_call->profile_count)) \ + ret = register_trace_##call(ftrace_profile_##call); \ + \ + return ret; \ +} \ + \ +static void ftrace_profile_disable_##call(struct ftrace_event_call *event_call)\ +{ \ + if (atomic_add_negative(-1, &event_call->profile_count)) \ + unregister_trace_##call(ftrace_profile_##call); \ +} + +#include TRACE_INCLUDE(TRACE_INCLUDE_FILE) + +#undef TP_fast_assign +#define TP_fast_assign(args...) args + +#undef TP_perf_assign +#define TP_perf_assign(args...) + +#endif + /* * Stage 4 of the trace events. * @@ -447,28 +532,6 @@ static inline int ftrace_get_offsets_##call( \ #define TP_FMT(fmt, args...) fmt "\n", ##args #ifdef CONFIG_EVENT_PROFILE -#define _TRACE_PROFILE(call, proto, args) \ -static void ftrace_profile_##call(proto) \ -{ \ - extern void perf_tpcounter_event(int); \ - perf_tpcounter_event(event_##call.id); \ -} \ - \ -static int ftrace_profile_enable_##call(struct ftrace_event_call *event_call) \ -{ \ - int ret = 0; \ - \ - if (!atomic_inc_return(&event_call->profile_count)) \ - ret = register_trace_##call(ftrace_profile_##call); \ - \ - return ret; \ -} \ - \ -static void ftrace_profile_disable_##call(struct ftrace_event_call *event_call)\ -{ \ - if (atomic_add_negative(-1, &event_call->profile_count)) \ - unregister_trace_##call(ftrace_profile_##call); \ -} #define _TRACE_PROFILE_INIT(call) \ .profile_count = ATOMIC_INIT(-1), \ @@ -476,7 +539,6 @@ static void ftrace_profile_disable_##call(struct ftrace_event_call *event_call)\ .profile_disable = ftrace_profile_disable_##call, #else -#define _TRACE_PROFILE(call, proto, args) #define _TRACE_PROFILE_INIT(call) #endif @@ -502,7 +564,6 @@ static void ftrace_profile_disable_##call(struct ftrace_event_call *event_call)\ #undef TRACE_EVENT #define TRACE_EVENT(call, proto, args, tstruct, assign, print) \ -_TRACE_PROFILE(call, PARAMS(proto), PARAMS(args)) \ \ static struct ftrace_event_call event_##call; \ \ @@ -586,6 +647,5 @@ __attribute__((section("_ftrace_events"))) event_##call = { \ #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) -#undef _TRACE_PROFILE #undef _TRACE_PROFILE_INIT |