diff options
author | Steven Rostedt <srostedt@redhat.com> | 2009-11-18 20:36:26 -0500 |
---|---|---|
committer | Steven Rostedt <rostedt@goodmis.org> | 2009-11-24 18:23:53 -0500 |
commit | e5bc9721684e9412f3e0465222f317c362a8ab47 (patch) | |
tree | 380e76f64fd58e1f68715514e4b37734f3098fb3 /include | |
parent | ff038f5c37c2070829004a0678372766c2b32180 (diff) |
tracing: Create new DEFINE_EVENT_PRINT
After creating the TRACE_EVENT_TEMPLATE I started to look at other
trace points to see what duplication was made. I noticed that there
are several trace points where they are almost identical except for
the name and the output format. Since TRACE_EVENT_TEMPLATE was successful
in bringing down the size of trace events, I added a DEFINE_EVENT_PRINT.
DEFINE_EVENT_PRINT is used just like DEFINE_EVENT is. That is, the
DEFINE_EVENT_PRINT also uses a TRACE_EVENT_TEMPLATE, but it allows the
developer to overwrite the print format. If there are two or more
TRACE_EVENTS that are identical except for the name and print, then
they can be converted to use a TRACE_EVENT_TEMPLATE. Since the
TRACE_EVENT_TEMPLATE already does the print output, the first trace event
would have its print format held in the TRACE_EVENT_TEMPLATE and
be defined with a DEFINE_EVENT. The rest will use the DEFINE_EVENT_PRINT
and override the print format.
Converting the sched trace points to both DEFINE_EVENT and
DEFINE_EVENT_PRINT. Five were converted to DEFINE_EVENT and two were
converted to DEFINE_EVENT_PRINT.
I was able to get the following:
$ size kernel/sched.o-*
text data bss dec hex filename
79299 6776 2520 88595 15a13 kernel/sched.o-notrace
101941 11896 2584 116421 1c6c5 kernel/sched.o-templ
104779 11896 2584 119259 1d1db kernel/sched.o-trace
sched.o-notrace is the scheduler compiled with no trace points.
sched.o-templ is with the use of DEFINE_EVENT and DEFINE_EVENT_PRINT
sched.o-trace is the current trace events.
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'include')
-rw-r--r-- | include/linux/tracepoint.h | 2 | ||||
-rw-r--r-- | include/trace/define_trace.h | 5 | ||||
-rw-r--r-- | include/trace/ftrace.h | 123 |
3 files changed, 126 insertions, 4 deletions
diff --git a/include/linux/tracepoint.h b/include/linux/tracepoint.h index 88a5b5a809ec..7063383cca13 100644 --- a/include/linux/tracepoint.h +++ b/include/linux/tracepoint.h @@ -283,6 +283,8 @@ static inline void tracepoint_synchronize_unregister(void) #define TRACE_EVENT_TEMPLATE(name, proto, args, tstruct, assign, print) #define DEFINE_EVENT(template, name, proto, args) \ DECLARE_TRACE(name, PARAMS(proto), PARAMS(args)) +#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \ + DECLARE_TRACE(name, PARAMS(proto), PARAMS(args)) #define TRACE_EVENT(name, proto, args, struct, assign, print) \ DECLARE_TRACE(name, PARAMS(proto), PARAMS(args)) diff --git a/include/trace/define_trace.h b/include/trace/define_trace.h index 244985814a43..5d7d855ae21e 100644 --- a/include/trace/define_trace.h +++ b/include/trace/define_trace.h @@ -35,6 +35,10 @@ #define DEFINE_EVENT(template, name, proto, args) \ DEFINE_TRACE(name) +#undef DEFINE_EVENT_PRINT +#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \ + DEFINE_TRACE(name) + #undef DECLARE_TRACE #define DECLARE_TRACE(name, proto, args) \ DEFINE_TRACE(name) @@ -69,6 +73,7 @@ #undef TRACE_EVENT_FN #undef TRACE_EVENT_TEMPLATE #undef DEFINE_EVENT +#undef DEFINE_EVENT_PRINT #undef TRACE_HEADER_MULTI_READ /* Only undef what we defined in this file */ diff --git a/include/trace/ftrace.h b/include/trace/ftrace.h index 2969f65d8002..b0461772bc8d 100644 --- a/include/trace/ftrace.h +++ b/include/trace/ftrace.h @@ -67,6 +67,10 @@ #define DEFINE_EVENT(template, name, proto, args) \ static struct ftrace_event_call event_##name +#undef DEFINE_EVENT_PRINT +#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \ + DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args)) + #undef __cpparg #define __cpparg(arg...) arg @@ -120,6 +124,10 @@ #undef DEFINE_EVENT #define DEFINE_EVENT(template, name, proto, args) +#undef DEFINE_EVENT_PRINT +#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \ + DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args)) + #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) /* @@ -198,15 +206,28 @@ #undef TRACE_EVENT_TEMPLATE #define TRACE_EVENT_TEMPLATE(call, proto, args, tstruct, func, print) \ static int \ -ftrace_format_##call(struct ftrace_event_call *unused, \ - struct trace_seq *s) \ +ftrace_format_setup_##call(struct ftrace_event_call *unused, \ + struct trace_seq *s) \ { \ struct ftrace_raw_##call field __attribute__((unused)); \ int ret = 0; \ \ tstruct; \ \ - trace_seq_printf(s, "\nprint fmt: " print); \ + return ret; \ +} \ + \ +static int \ +ftrace_format_##call(struct ftrace_event_call *unused, \ + struct trace_seq *s) \ +{ \ + int ret = 0; \ + \ + ret = ftrace_format_setup_##call(unused, s); \ + if (!ret) \ + return ret; \ + \ + ret = trace_seq_printf(s, "\nprint fmt: " print); \ \ return ret; \ } @@ -214,6 +235,23 @@ ftrace_format_##call(struct ftrace_event_call *unused, \ #undef DEFINE_EVENT #define DEFINE_EVENT(template, name, proto, args) +#undef DEFINE_EVENT_PRINT +#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \ +static int \ +ftrace_format_##name(struct ftrace_event_call *unused, \ + struct trace_seq *s) \ +{ \ + int ret = 0; \ + \ + ret = ftrace_format_setup_##template(unused, s); \ + if (!ret) \ + return ret; \ + \ + trace_seq_printf(s, "\nprint fmt: " print); \ + \ + return ret; \ +} + #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) /* @@ -325,6 +363,38 @@ ftrace_raw_output_##name(struct trace_iterator *iter, int flags) \ #name, iter, flags); \ } +#undef DEFINE_EVENT_PRINT +#define DEFINE_EVENT_PRINT(template, call, proto, args, print) \ +static enum print_line_t \ +ftrace_raw_output_##call(struct trace_iterator *iter, int flags) \ +{ \ + struct trace_seq *s = &iter->seq; \ + struct ftrace_raw_##template *field; \ + struct trace_entry *entry; \ + struct trace_seq *p; \ + int ret; \ + \ + entry = iter->ent; \ + \ + if (entry->type != event_##call.id) { \ + WARN_ON_ONCE(1); \ + return TRACE_TYPE_UNHANDLED; \ + } \ + \ + field = (typeof(field))entry; \ + \ + p = &get_cpu_var(ftrace_event_seq); \ + trace_seq_init(p); \ + ret = trace_seq_printf(s, "%s: ", #call); \ + if (ret) \ + ret = trace_seq_printf(s, print); \ + put_cpu(); \ + if (!ret) \ + return TRACE_TYPE_PARTIAL_LINE; \ + \ + return TRACE_TYPE_HANDLED; \ +} + #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) #undef __field_ext @@ -378,6 +448,10 @@ ftrace_define_fields_##call(struct ftrace_event_call *event_call) \ #undef DEFINE_EVENT #define DEFINE_EVENT(template, name, proto, args) +#undef DEFINE_EVENT_PRINT +#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \ + DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args)) + #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) /* @@ -422,6 +496,10 @@ static inline int ftrace_get_offsets_##call( \ #undef DEFINE_EVENT #define DEFINE_EVENT(template, name, proto, args) +#undef DEFINE_EVENT_PRINT +#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \ + DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args)) + #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) #ifdef CONFIG_EVENT_PROFILE @@ -461,6 +539,10 @@ static void ftrace_profile_disable_##name(struct ftrace_event_call *unused)\ unregister_trace_##name(ftrace_profile_##name); \ } +#undef DEFINE_EVENT_PRINT +#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \ + DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args)) + #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) #endif @@ -674,7 +756,19 @@ static int ftrace_raw_init_event_##call(struct ftrace_event_call *unused)\ event_##call.id = id; \ INIT_LIST_HEAD(&event_##call.fields); \ return 0; \ -} \ +} + +#undef DEFINE_EVENT_PRINT +#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \ + DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args)) + +#include TRACE_INCLUDE(TRACE_INCLUDE_FILE) + +#undef TRACE_EVENT_TEMPLATE +#define TRACE_EVENT_TEMPLATE(call, proto, args, tstruct, assign, print) + +#undef DEFINE_EVENT +#define DEFINE_EVENT(template, call, proto, args) \ \ static struct ftrace_event_call __used \ __attribute__((__aligned__(4))) \ @@ -690,6 +784,23 @@ __attribute__((section("_ftrace_events"))) event_##call = { \ _TRACE_PROFILE_INIT(call) \ } +#undef DEFINE_EVENT_PRINT +#define DEFINE_EVENT_PRINT(template, call, proto, args, print) \ + \ +static struct ftrace_event_call __used \ +__attribute__((__aligned__(4))) \ +__attribute__((section("_ftrace_events"))) event_##call = { \ + .name = #call, \ + .system = __stringify(TRACE_SYSTEM), \ + .event = &ftrace_event_type_##call, \ + .raw_init = ftrace_raw_init_event_##call, \ + .regfunc = ftrace_raw_reg_event_##call, \ + .unregfunc = ftrace_raw_unreg_event_##call, \ + .show_format = ftrace_format_##call, \ + .define_fields = ftrace_define_fields_##template, \ + _TRACE_PROFILE_INIT(call) \ +} + #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) /* @@ -854,6 +965,10 @@ static void ftrace_profile_##call(proto) \ ftrace_profile_templ_##template(event_call, args); \ } +#undef DEFINE_EVENT_PRINT +#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \ + DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args)) + #include TRACE_INCLUDE(TRACE_INCLUDE_FILE) #endif /* CONFIG_EVENT_PROFILE */ |