From eb594e45f6979cd10b18d87f7b3f02119e00a108 Mon Sep 17 00:00:00 2001 From: Steven Rostedt Date: Fri, 27 Feb 2009 17:36:06 -0500 Subject: [PATCH 01/10] tracing: move trace point formats to files in include/trace directory Impact: clean up To further facilitate the ease of adding trace points for developers, this patch creates include/trace/trace_events.h and include/trace/trace_event_types.h. The former file will hold the trace/.h files and the latter will hold the trace/_event_types.h files. To create new tracepoints and to have them automatically appear in the event tracer, a developer makes the trace/.h file which includes and the trace/_event_types.h file. The trace/_event_types.h file will hold the TRACE_FORMAT macros. Then add the trace/.h file to trace/trace_events.h, and add the trace/_event_types.h to the trace_event_types.h file. No need to modify files elsewhere. Signed-off-by: Steven Rostedt --- include/trace/trace_event_types.h | 4 ++++ include/trace/trace_events.h | 4 ++++ kernel/trace/events.c | 10 ++-------- 3 files changed, 10 insertions(+), 8 deletions(-) create mode 100644 include/trace/trace_event_types.h create mode 100644 include/trace/trace_events.h diff --git a/include/trace/trace_event_types.h b/include/trace/trace_event_types.h new file mode 100644 index 000000000000..33c8ed5ccb6c --- /dev/null +++ b/include/trace/trace_event_types.h @@ -0,0 +1,4 @@ +/* trace/_event_types.h here */ + +#include +#include diff --git a/include/trace/trace_events.h b/include/trace/trace_events.h new file mode 100644 index 000000000000..ea2ef2051762 --- /dev/null +++ b/include/trace/trace_events.h @@ -0,0 +1,4 @@ +/* trace/.h here */ + +#include +#include diff --git a/kernel/trace/events.c b/kernel/trace/events.c index 3c75623893cc..46e27ad2487e 100644 --- a/kernel/trace/events.c +++ b/kernel/trace/events.c @@ -1,15 +1,9 @@ /* * This is the place to register all trace points as events. - * Include the trace/.h at the top. - * Include the trace/_event_types.h at the bottom. */ -/* trace/.h here */ -#include -#include +#include #include "trace_events.h" -/* trace/_event_types.h here */ -#include -#include +#include From 6ecc2d1ca39177edb6fbdb7412948b0e9f409d02 Mon Sep 17 00:00:00 2001 From: Steven Rostedt Date: Fri, 27 Feb 2009 21:33:02 -0500 Subject: [PATCH 02/10] tracing: add subsystem level to trace events If a trace point header defines TRACE_SYSTEM, then it will add the following trace points into that event system. If include/trace/irq_event_types.h has: #define TRACE_SYSTEM irq at the top and #undef TRACE_SYSTEM at the bottom, then a directory "irq" will be created in the /debug/tracing/events directory. Inside that directory will contain the two trace points that are defined in include/trace/irq_event_types.h. Only adding the above to irq and not to sched, we get: # ls /debug/tracing/events/ irq sched_process_exit sched_signal_send sched_wakeup_new sched_kthread_stop sched_process_fork sched_switch sched_kthread_stop_ret sched_process_free sched_wait_task sched_migrate_task sched_process_wait sched_wakeup # ls /debug/tracing/events/irq irq_handler_entry irq_handler_exit If we add #define TRACE_SYSTEM sched to the trace/sched_event_types.h then the rest of the trace events will be put in a sched directory within the events directory. I've been playing with this idea of the subsystem for a while, but recently Tom Zanussi posted some patches to lkml that included this method. Tom's approach was clean and got me to finally put some effort to clean up the event trace points. Thanks to Tom Zanussi for demonstrating how nice the subsystem method is. Signed-off-by: Steven Rostedt --- kernel/trace/events.c | 4 ++++ kernel/trace/trace_events.c | 48 +++++++++++++++++++++++++++++++++++++ kernel/trace/trace_events.h | 2 ++ 3 files changed, 54 insertions(+) diff --git a/kernel/trace/events.c b/kernel/trace/events.c index 46e27ad2487e..4e4e45860c58 100644 --- a/kernel/trace/events.c +++ b/kernel/trace/events.c @@ -2,6 +2,10 @@ * This is the place to register all trace points as events. */ +/* someday this needs to go in a generic header */ +#define __STR(x) #x +#define STR(x) __STR(x) + #include #include "trace_events.h" diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c index 3bcb9df93342..19332200c457 100644 --- a/kernel/trace/trace_events.c +++ b/kernel/trace/trace_events.c @@ -345,11 +345,59 @@ static struct dentry *event_trace_events_dir(void) return d_events; } +struct event_subsystem { + struct list_head list; + const char *name; + struct dentry *entry; +}; + +static LIST_HEAD(event_subsystems); + +static struct dentry * +event_subsystem_dir(const char *name, struct dentry *d_events) +{ + struct event_subsystem *system; + + /* First see if we did not already create this dir */ + list_for_each_entry(system, &event_subsystems, list) { + if (strcmp(system->name, name) == 0) + return system->entry; + } + + /* need to create new entry */ + system = kmalloc(sizeof(*system), GFP_KERNEL); + if (!system) { + pr_warning("No memory to create event subsystem %s\n", + name); + return d_events; + } + + system->entry = debugfs_create_dir(name, d_events); + if (!system->entry) { + pr_warning("Could not create event subsystem %s\n", + name); + kfree(system); + return d_events; + } + + system->name = name; + list_add(&system->list, &event_subsystems); + + return system->entry; +} + static int event_create_dir(struct ftrace_event_call *call, struct dentry *d_events) { struct dentry *entry; + /* + * If the trace point header did not define TRACE_SYSTEM + * then the system would be called "TRACE_SYSTEM". + */ + if (strcmp(call->system, "TRACE_SYSTEM") != 0) + d_events = event_subsystem_dir(call->system, d_events); + call->dir = debugfs_create_dir(call->name, d_events); if (!call->dir) { pr_warning("Could not create debugfs " diff --git a/kernel/trace/trace_events.h b/kernel/trace/trace_events.h index deb95e5006c8..b015d7b19878 100644 --- a/kernel/trace/trace_events.h +++ b/kernel/trace/trace_events.h @@ -7,6 +7,7 @@ struct ftrace_event_call { char *name; + char *system; struct dentry *dir; int enabled; int (*regfunc)(void); @@ -44,6 +45,7 @@ static struct ftrace_event_call __used \ __attribute__((__aligned__(4))) \ __attribute__((section("_ftrace_events"))) event_##call = { \ .name = #call, \ + .system = STR(TRACE_SYSTEM), \ .regfunc = ftrace_reg_event_##call, \ .unregfunc = ftrace_unreg_event_##call, \ } From b628b3e629b1436710e59a21cc020fbb04a52ce1 Mon Sep 17 00:00:00 2001 From: Steven Rostedt Date: Fri, 27 Feb 2009 23:32:58 -0500 Subject: [PATCH 03/10] tracing: make the set_event and available_events subsystem aware This patch makes the event files, set_event and available_events aware of the subsystem. Now you can enable an entire subsystem with: echo 'irq:*' > set_event Note: the '*' is not needed. Signed-off-by: Steven Rostedt --- kernel/trace/trace_events.c | 43 ++++++++++++++++++++++++++++++++++--- 1 file changed, 40 insertions(+), 3 deletions(-) diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c index 19332200c457..b811eb343522 100644 --- a/kernel/trace/trace_events.c +++ b/kernel/trace/trace_events.c @@ -12,6 +12,8 @@ #include "trace_events.h" +#define TRACE_SYSTEM "TRACE_SYSTEM" + #define events_for_each(event) \ for (event = __start_ftrace_events; \ (unsigned long)event < (unsigned long)__stop_ftrace_events; \ @@ -45,14 +47,47 @@ static void ftrace_clear_events(void) static int ftrace_set_clr_event(char *buf, int set) { struct ftrace_event_call *call = __start_ftrace_events; + char *event = NULL, *sub = NULL, *match; + int ret = -EINVAL; + /* + * The buf format can be : + * *: means any event by that name. + * : is the same. + * + * :* means all events in that subsystem + * : means the same. + * + * (no ':') means all events in a subsystem with + * the name or any event that matches + */ + + match = strsep(&buf, ":"); + if (buf) { + sub = match; + event = buf; + match = NULL; + + if (!strlen(sub) || strcmp(sub, "*") == 0) + sub = NULL; + if (!strlen(event) || strcmp(event, "*") == 0) + event = NULL; + } events_for_each(call) { if (!call->name) continue; - if (strcmp(buf, call->name) != 0) + if (match && + strcmp(match, call->name) != 0 && + strcmp(match, call->system) != 0) + continue; + + if (sub && strcmp(sub, call->system) != 0) + continue; + + if (event && strcmp(event, call->name) != 0) continue; if (set) { @@ -68,9 +103,9 @@ static int ftrace_set_clr_event(char *buf, int set) call->enabled = 0; call->unregfunc(); } - return 0; + ret = 0; } - return -EINVAL; + return ret; } /* 128 should be much more than enough */ @@ -200,6 +235,8 @@ static int t_show(struct seq_file *m, void *v) { struct ftrace_event_call *call = v; + if (strcmp(call->system, TRACE_SYSTEM) != 0) + seq_printf(m, "%s:", call->system); seq_printf(m, "%s\n", call->name); return 0; From 0ec2ef1505b3e1f54b07bf64f184c92859c3e13f Mon Sep 17 00:00:00 2001 From: Steven Rostedt Date: Fri, 27 Feb 2009 23:41:43 -0500 Subject: [PATCH 04/10] tracing: add subsystem irq for irq events Add the TRACE_SYSTEM irq for the irq events. Signed-off-by: Steven Rostedt --- include/trace/irq_event_types.h | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/include/trace/irq_event_types.h b/include/trace/irq_event_types.h index 5d0919fdd2d4..47a2be1b2d7d 100644 --- a/include/trace/irq_event_types.h +++ b/include/trace/irq_event_types.h @@ -5,6 +5,9 @@ # error Unless you know what you are doing. #endif +#undef TRACE_SYSTEM +#define TRACE_SYSTEM irq + TRACE_FORMAT(irq_handler_entry, TPPROTO(int irq, struct irqaction *action), TPARGS(irq, action), @@ -15,3 +18,5 @@ TRACE_FORMAT(irq_handler_exit, TPARGS(irq, action, ret), TPFMT("irq=%d handler=%s return=%s", irq, action->name, ret ? "handled" : "unhandled")); + +#undef TRACE_SYSTEM From 3d7ba938da8481b4f7f9ed3d943dbae49389b284 Mon Sep 17 00:00:00 2001 From: Steven Rostedt Date: Fri, 27 Feb 2009 23:45:52 -0500 Subject: [PATCH 05/10] tracing: add subsystem sched for sched events Add the TRACE_SYSTEM sched for the sched events. Signed-off-by: Steven Rostedt --- include/trace/sched_event_types.h | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/include/trace/sched_event_types.h b/include/trace/sched_event_types.h index a3d3d66a51c8..2ada206565a3 100644 --- a/include/trace/sched_event_types.h +++ b/include/trace/sched_event_types.h @@ -5,6 +5,9 @@ # error Unless you know what you are doing. #endif +#undef TRACE_SYSTEM +#define TRACE_SYSTEM sched + TRACE_FORMAT(sched_kthread_stop, TPPROTO(struct task_struct *t), TPARGS(t), @@ -70,3 +73,5 @@ TRACE_FORMAT(sched_signal_send, TPPROTO(int sig, struct task_struct *p), TPARGS(sig, p), TPFMT("sig: %d task %s:%d", sig, p->comm, p->pid)); + +#undef TRACE_SYSTEM From ef5580d0fffce6e0a01043bac0625128b5d409a7 Mon Sep 17 00:00:00 2001 From: Steven Rostedt Date: Fri, 27 Feb 2009 19:38:04 -0500 Subject: [PATCH 06/10] tracing: add interface to write into current tracer buffer Right now all tracers must manage their own trace buffers. This was to enforce tracers to be independent in case we finally decide to allow each tracer to have their own trace buffer. But now we are adding event tracing that writes to the current tracer's buffer. This adds an interface to allow events to write to the current tracer buffer without having to manage its own. Since event tracing has no "tracer", and is just a way to hook into any other tracer. Signed-off-by: Steven Rostedt --- kernel/trace/trace.c | 14 ++++++++++++++ kernel/trace/trace.h | 6 ++++++ 2 files changed, 20 insertions(+) diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index 9c5987aca74b..c5e39cd7310d 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -846,6 +846,20 @@ void trace_buffer_unlock_commit(struct trace_array *tr, trace_wake_up(); } +struct ring_buffer_event * +trace_current_buffer_lock_reserve(unsigned char type, unsigned long len, + unsigned long flags, int pc) +{ + return trace_buffer_lock_reserve(&global_trace, + type, len, flags, pc); +} + +void trace_current_buffer_unlock_commit(struct ring_buffer_event *event, + unsigned long flags, int pc) +{ + return trace_buffer_unlock_commit(&global_trace, event, flags, pc); +} + void trace_function(struct trace_array *tr, unsigned long ip, unsigned long parent_ip, unsigned long flags, diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h index 632191770aac..adf161f6dd11 100644 --- a/kernel/trace/trace.h +++ b/kernel/trace/trace.h @@ -442,6 +442,12 @@ void trace_buffer_unlock_commit(struct trace_array *tr, struct ring_buffer_event *event, unsigned long flags, int pc); +struct ring_buffer_event * +trace_current_buffer_lock_reserve(unsigned char type, unsigned long len, + unsigned long flags, int pc); +void trace_current_buffer_unlock_commit(struct ring_buffer_event *event, + unsigned long flags, int pc); + struct trace_entry *tracing_get_trace_entry(struct trace_array *tr, struct trace_array_cpu *data); From c32e827b25054cb17b79cf97fb5e63ae4ce2223c Mon Sep 17 00:00:00 2001 From: Steven Rostedt Date: Fri, 27 Feb 2009 19:12:30 -0500 Subject: [PATCH 07/10] tracing: add raw trace point recording infrastructure Impact: lower overhead tracing The current event tracer can automatically pick up trace points that are registered with the TRACE_FORMAT macro. But it required a printf format string and parsing. Although, this adds the ability to get guaranteed information like task names and such, it took a hit in overhead processing. This processing can add about 500-1000 nanoseconds overhead, but in some cases that too is considered too much and we want to shave off as much from this overhead as possible. Tom Zanussi recently posted tracing patches to lkml that are based on a nice idea about capturing the data via C structs using STRUCT_ENTER, STRUCT_EXIT type of macros. I liked that method very much, but did not like the implementation that required a developer to add data/code in several disjoint locations. This patch extends the event_tracer macros to do a similar "raw C" approach that Tom Zanussi did. But instead of having the developers needing to tweak a bunch of code all over the place, they can do it all in one macro - preferably placed near the code that it is tracing. That makes it much more likely that tracepoints will be maintained on an ongoing basis by the code they modify. The new macro TRACE_EVENT_FORMAT is created for this approach. (Note, a developer may still utilize the more low level DECLARE_TRACE macros if they don't care about getting their traces automatically in the event tracer.) They can also use the existing TRACE_FORMAT if they don't need to code the tracepoint in C, but just want to use the convenience of printf. So if the developer wants to "hardwire" a tracepoint in the fastest possible way, and wants to acquire their data via a user space utility in a raw binary format, or wants to see it in the trace output but not sacrifice any performance, then they can implement the faster but more complex TRACE_EVENT_FORMAT macro. Here's what usage looks like: TRACE_EVENT_FORMAT(name, TPPROTO(proto), TPARGS(args), TPFMT(fmt, fmt_args), TRACE_STUCT( TRACE_FIELD(type1, item1, assign1) TRACE_FIELD(type2, item2, assign2) [...] ), TPRAWFMT(raw_fmt) ); Note name, proto, args, and fmt, are all identical to what TRACE_FORMAT uses. name: is the unique identifier of the trace point proto: The proto type that the trace point uses args: the args in the proto type fmt: printf format to use with the event printf tracer fmt_args: the printf argments to match fmt TRACE_STRUCT starts the ability to create a structure. Each item in the structure is defined with a TRACE_FIELD TRACE_FIELD(type, item, assign) type: the C type of item. item: the name of the item in the stucture assign: what to assign the item in the trace point callback raw_fmt is a way to pretty print the struct. It must match the order of the items are added in TRACE_STUCT An example of this would be: TRACE_EVENT_FORMAT(sched_wakeup, TPPROTO(struct rq *rq, struct task_struct *p, int success), TPARGS(rq, p, success), TPFMT("task %s:%d %s", p->comm, p->pid, success?"succeeded":"failed"), TRACE_STRUCT( TRACE_FIELD(pid_t, pid, p->pid) TRACE_FIELD(int, success, success) ), TPRAWFMT("task %d success=%d") ); This creates us a unique struct of: struct { pid_t pid; int success; }; And the way the call back would assign these values would be: entry->pid = p->pid; entry->success = success; The nice part about this is that the creation of the assignent is done via macro magic in the event tracer. Once the TRACE_EVENT_FORMAT is created, the developer will then have a faster method to record into the ring buffer. They do not need to worry about the tracer itself. The developer would only need to touch the files in include/trace/*.h Again, I would like to give special thanks to Tom Zanussi for this nice idea. Idea-from: Tom Zanussi Signed-off-by: Steven Rostedt --- kernel/trace/events.c | 6 +- kernel/trace/trace.h | 19 +++ kernel/trace/trace_events.c | 2 +- kernel/trace/trace_events.h | 57 -------- kernel/trace/trace_events_stage_1.h | 34 +++++ kernel/trace/trace_events_stage_2.h | 72 +++++++++ kernel/trace/trace_events_stage_3.h | 219 ++++++++++++++++++++++++++++ 7 files changed, 350 insertions(+), 59 deletions(-) delete mode 100644 kernel/trace/trace_events.h create mode 100644 kernel/trace/trace_events_stage_1.h create mode 100644 kernel/trace/trace_events_stage_2.h create mode 100644 kernel/trace/trace_events_stage_3.h diff --git a/kernel/trace/events.c b/kernel/trace/events.c index 4e4e45860c58..f2509cbaacea 100644 --- a/kernel/trace/events.c +++ b/kernel/trace/events.c @@ -8,6 +8,10 @@ #include -#include "trace_events.h" +#include "trace_output.h" + +#include "trace_events_stage_1.h" +#include "trace_events_stage_2.h" +#include "trace_events_stage_3.h" #include diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h index adf161f6dd11..aa1ab0cb80ab 100644 --- a/kernel/trace/trace.h +++ b/kernel/trace/trace.h @@ -726,4 +726,23 @@ static inline void trace_branch_disable(void) } #endif /* CONFIG_BRANCH_TRACER */ +struct ftrace_event_call { + char *name; + char *system; + struct dentry *dir; + int enabled; + int (*regfunc)(void); + void (*unregfunc)(void); + int id; + struct dentry *raw_dir; + int raw_enabled; + int (*raw_init)(void); + int (*raw_reg)(void); + void (*raw_unreg)(void); +}; + +void event_trace_printk(unsigned long ip, const char *fmt, ...); +extern struct ftrace_event_call __start_ftrace_events[]; +extern struct ftrace_event_call __stop_ftrace_events[]; + #endif /* _LINUX_KERNEL_TRACE_H */ diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c index b811eb343522..77a5c02bd634 100644 --- a/kernel/trace/trace_events.c +++ b/kernel/trace/trace_events.c @@ -10,7 +10,7 @@ #include #include -#include "trace_events.h" +#include "trace.h" #define TRACE_SYSTEM "TRACE_SYSTEM" diff --git a/kernel/trace/trace_events.h b/kernel/trace/trace_events.h deleted file mode 100644 index b015d7b19878..000000000000 --- a/kernel/trace/trace_events.h +++ /dev/null @@ -1,57 +0,0 @@ -#ifndef _LINUX_KERNEL_TRACE_EVENTS_H -#define _LINUX_KERNEL_TRACE_EVENTS_H - -#include -#include -#include "trace.h" - -struct ftrace_event_call { - char *name; - char *system; - struct dentry *dir; - int enabled; - int (*regfunc)(void); - void (*unregfunc)(void); -}; - - -#undef TPFMT -#define TPFMT(fmt, args...) fmt "\n", ##args - -#undef TRACE_FORMAT -#define TRACE_FORMAT(call, proto, args, fmt) \ -static void ftrace_event_##call(proto) \ -{ \ - event_trace_printk(_RET_IP_, "(" #call ") " fmt); \ -} \ - \ -static int ftrace_reg_event_##call(void) \ -{ \ - int ret; \ - \ - ret = register_trace_##call(ftrace_event_##call); \ - if (!ret) \ - pr_info("event trace: Could not activate trace point " \ - "probe to " #call); \ - return ret; \ -} \ - \ -static void ftrace_unreg_event_##call(void) \ -{ \ - unregister_trace_##call(ftrace_event_##call); \ -} \ - \ -static struct ftrace_event_call __used \ -__attribute__((__aligned__(4))) \ -__attribute__((section("_ftrace_events"))) event_##call = { \ - .name = #call, \ - .system = STR(TRACE_SYSTEM), \ - .regfunc = ftrace_reg_event_##call, \ - .unregfunc = ftrace_unreg_event_##call, \ -} - -void event_trace_printk(unsigned long ip, const char *fmt, ...); -extern struct ftrace_event_call __start_ftrace_events[]; -extern struct ftrace_event_call __stop_ftrace_events[]; - -#endif /* _LINUX_KERNEL_TRACE_EVENTS_H */ diff --git a/kernel/trace/trace_events_stage_1.h b/kernel/trace/trace_events_stage_1.h new file mode 100644 index 000000000000..fd3bf9382d37 --- /dev/null +++ b/kernel/trace/trace_events_stage_1.h @@ -0,0 +1,34 @@ +/* + * Stage 1 of the trace events. + * + * Override the macros in to include the following: + * + * struct ftrace_raw_ { + * struct trace_entry ent; + * ; + * [...] + * }; + * + * The is created by the TRACE_FIELD(type, item, assign) + * macro. We simply do "type item;", and that will create the fields + * in the structure. + */ + +#undef TRACE_FORMAT +#define TRACE_FORMAT(call, proto, args, fmt) + +#undef TRACE_EVENT_FORMAT +#define TRACE_EVENT_FORMAT(name, proto, args, fmt, tstruct, tpfmt) \ + struct ftrace_raw_##name { \ + struct trace_entry ent; \ + tstruct \ + }; \ + static struct ftrace_event_call event_##name + +#undef TRACE_STRUCT +#define TRACE_STRUCT(args...) args + +#define TRACE_FIELD(type, item, assign) \ + type item; + +#include diff --git a/kernel/trace/trace_events_stage_2.h b/kernel/trace/trace_events_stage_2.h new file mode 100644 index 000000000000..3eaaef5f19e1 --- /dev/null +++ b/kernel/trace/trace_events_stage_2.h @@ -0,0 +1,72 @@ +/* + * Stage 2 of the trace events. + * + * Override the macros in to include the following: + * + * enum print_line_t + * ftrace_raw_output_(struct trace_iterator *iter, int flags) + * { + * struct trace_seq *s = &iter->seq; + * struct ftrace_raw_ *field; <-- defined in stage 1 + * struct trace_entry *entry; + * int ret; + * + * entry = iter->ent; + * + * if (entry->type != event_.id) { + * WARN_ON_ONCE(1); + * return TRACE_TYPE_UNHANDLED; + * } + * + * field = (typeof(field))entry; + * + * ret = trace_seq_printf(s, "%s", "\n"); + * if (!ret) + * return TRACE_TYPE_PARTIAL_LINE; + * + * return TRACE_TYPE_HANDLED; + * } + * + * This is the method used to print the raw event to the trace + * output format. Note, this is not needed if the data is read + * in binary. + */ + +#undef TRACE_STRUCT +#define TRACE_STRUCT(args...) args + +#undef TRACE_FIELD +#define TRACE_FIELD(type, item, assign) \ + field->item, + + +#undef TPRAWFMT +#define TPRAWFMT(args...) args + +#undef TRACE_EVENT_FORMAT +#define TRACE_EVENT_FORMAT(call, proto, args, fmt, tstruct, tpfmt) \ +enum print_line_t \ +ftrace_raw_output_##call(struct trace_iterator *iter, int flags) \ +{ \ + struct trace_seq *s = &iter->seq; \ + struct ftrace_raw_##call *field; \ + struct trace_entry *entry; \ + int ret; \ + \ + entry = iter->ent; \ + \ + if (entry->type != event_##call.id) { \ + WARN_ON_ONCE(1); \ + return TRACE_TYPE_UNHANDLED; \ + } \ + \ + field = (typeof(field))entry; \ + \ + ret = trace_seq_printf(s, tpfmt "%s", tstruct "\n"); \ + if (!ret) \ + return TRACE_TYPE_PARTIAL_LINE; \ + \ + return TRACE_TYPE_HANDLED; \ +} + +#include diff --git a/kernel/trace/trace_events_stage_3.h b/kernel/trace/trace_events_stage_3.h new file mode 100644 index 000000000000..7a161c49deb4 --- /dev/null +++ b/kernel/trace/trace_events_stage_3.h @@ -0,0 +1,219 @@ +/* + * Stage 3 of the trace events. + * + * Override the macros in to include the following: + * + * static void ftrace_event_(proto) + * { + * event_trace_printk(_RET_IP_, "() " ); + * } + * + * static int ftrace_reg_event_(void) + * { + * int ret; + * + * ret = register_trace_(ftrace_event_); + * if (!ret) + * pr_info("event trace: Could not activate trace point " + * "probe to "); + * return ret; + * } + * + * static void ftrace_unreg_event_(void) + * { + * unregister_trace_(ftrace_event_); + * } + * + * For those macros defined with TRACE_FORMAT: + * + * static struct ftrace_event_call __used + * __attribute__((__aligned__(4))) + * __attribute__((section("_ftrace_events"))) event_ = { + * .name = "", + * .regfunc = ftrace_reg_event_, + * .unregfunc = ftrace_unreg_event_, + * } + * + * + * For those macros defined with TRACE_EVENT_FORMAT: + * + * static struct ftrace_event_call event_; + * + * static void ftrace_raw_event_(proto) + * { + * struct ring_buffer_event *event; + * struct ftrace_raw_ *entry; <-- defined in stage 1 + * unsigned long irq_flags; + * int pc; + * + * local_save_flags(irq_flags); + * pc = preempt_count(); + * + * event = trace_current_buffer_lock_reserve(event_.id, + * sizeof(struct ftrace_raw_), + * irq_flags, pc); + * if (!event) + * return; + * entry = ring_buffer_event_data(event); + * + * ; <-- Here we assign the entries by the TRACE_FIELD. + * + * trace_current_buffer_unlock_commit(event, irq_flags, pc); + * } + * + * static int ftrace_raw_reg_event_(void) + * { + * int ret; + * + * ret = register_trace_(ftrace_raw_event_); + * if (!ret) + * pr_info("event trace: Could not activate trace point " + * "probe to "); + * return ret; + * } + * + * static void ftrace_unreg_event_(void) + * { + * unregister_trace_(ftrace_raw_event_); + * } + * + * static struct trace_event ftrace_event_type_ = { + * .trace = ftrace_raw_output_, <-- stage 2 + * }; + * + * static int ftrace_raw_init_event_(void) + * { + * int id; + * + * id = register_ftrace_event(&ftrace_event_type_); + * if (!id) + * return -ENODEV; + * event_.id = id; + * return 0; + * } + * + * static struct ftrace_event_call __used + * __attribute__((__aligned__(4))) + * __attribute__((section("_ftrace_events"))) event_ = { + * .name = "", + * .regfunc = ftrace_reg_event_, + * .unregfunc = ftrace_unreg_event_, + * .raw_init = ftrace_raw_init_event_, + * .raw_reg = ftrace_raw_reg_event_, + * .raw_unreg = ftrace_raw_unreg_event_, + * } + * + */ + +#undef TPFMT +#define TPFMT(fmt, args...) fmt "\n", ##args + +#define _TRACE_FORMAT(call, proto, args, fmt) \ +static void ftrace_event_##call(proto) \ +{ \ + event_trace_printk(_RET_IP_, "(" #call ") " fmt); \ +} \ + \ +static int ftrace_reg_event_##call(void) \ +{ \ + int ret; \ + \ + ret = register_trace_##call(ftrace_event_##call); \ + if (!ret) \ + pr_info("event trace: Could not activate trace point " \ + "probe to " #call); \ + return ret; \ +} \ + \ +static void ftrace_unreg_event_##call(void) \ +{ \ + unregister_trace_##call(ftrace_event_##call); \ +} \ + + +#undef TRACE_FORMAT +#define TRACE_FORMAT(call, proto, args, fmt) \ +_TRACE_FORMAT(call, PARAMS(proto), PARAMS(args), PARAMS(fmt)) \ +static struct ftrace_event_call __used \ +__attribute__((__aligned__(4))) \ +__attribute__((section("_ftrace_events"))) event_##call = { \ + .name = #call, \ + .system = STR(TRACE_SYSTEM), \ + .regfunc = ftrace_reg_event_##call, \ + .unregfunc = ftrace_unreg_event_##call, \ +} + +#undef TRACE_FIELD +#define TRACE_FIELD(type, item, assign)\ + entry->item = assign; + +#undef TRACE_EVENT_FORMAT +#define TRACE_EVENT_FORMAT(call, proto, args, fmt, tstruct, tpfmt) \ +_TRACE_FORMAT(call, PARAMS(proto), PARAMS(args), PARAMS(fmt)) \ + \ +static struct ftrace_event_call event_##call; \ + \ +static void ftrace_raw_event_##call(proto) \ +{ \ + struct ring_buffer_event *event; \ + struct ftrace_raw_##call *entry; \ + unsigned long irq_flags; \ + int pc; \ + \ + local_save_flags(irq_flags); \ + pc = preempt_count(); \ + \ + event = trace_current_buffer_lock_reserve(event_##call.id, \ + sizeof(struct ftrace_raw_##call), \ + irq_flags, pc); \ + if (!event) \ + return; \ + entry = ring_buffer_event_data(event); \ + \ + tstruct; \ + \ + trace_current_buffer_unlock_commit(event, irq_flags, pc); \ +} \ + \ +static int ftrace_raw_reg_event_##call(void) \ +{ \ + int ret; \ + \ + ret = register_trace_##call(ftrace_raw_event_##call); \ + if (!ret) \ + pr_info("event trace: Could not activate trace point " \ + "probe to " #call); \ + return ret; \ +} \ + \ +static void ftrace_raw_unreg_event_##call(void) \ +{ \ + unregister_trace_##call(ftrace_raw_event_##call); \ +} \ + \ +static struct trace_event ftrace_event_type_##call = { \ + .trace = ftrace_raw_output_##call, \ +}; \ + \ +static int ftrace_raw_init_event_##call(void) \ +{ \ + int id; \ + \ + id = register_ftrace_event(&ftrace_event_type_##call); \ + if (!id) \ + return -ENODEV; \ + event_##call.id = id; \ + return 0; \ +} \ + \ +static struct ftrace_event_call __used \ +__attribute__((__aligned__(4))) \ +__attribute__((section("_ftrace_events"))) event_##call = { \ + .name = #call, \ + .system = STR(TRACE_SYSTEM), \ + .regfunc = ftrace_reg_event_##call, \ + .unregfunc = ftrace_unreg_event_##call, \ + .raw_init = ftrace_raw_init_event_##call, \ + .raw_reg = ftrace_raw_reg_event_##call, \ + .raw_unreg = ftrace_raw_unreg_event_##call, \ +} From fd99498989f3b3feeab89dcadf537138ba136d24 Mon Sep 17 00:00:00 2001 From: Steven Rostedt Date: Sat, 28 Feb 2009 02:41:25 -0500 Subject: [PATCH 08/10] tracing: add raw fast tracing interface for trace events This patch adds the interface to enable the C style trace points. In the directory /debugfs/tracing/events/subsystem/event We now have three files: enable : values 0 or 1 to enable or disable the trace event. available_types: values 'raw' and 'printf' which indicate the tracing types available for the trace point. If a developer does not use the TRACE_EVENT_FORMAT macro and just uses the TRACE_FORMAT macro, then only 'printf' will be available. This file is read only. type: values 'raw' or 'printf'. This indicates which type of tracing is active for that trace point. 'printf' is the default and if 'raw' is not available, this file is read only. # echo raw > /debug/tracing/events/sched/sched_wakeup/type # echo 1 > /debug/tracing/events/sched/sched_wakeup/enable Will enable the C style tracing for the sched_wakeup trace point. Signed-off-by: Steven Rostedt --- kernel/trace/trace.h | 7 ++ kernel/trace/trace_events.c | 199 +++++++++++++++++++++++++++++++----- 2 files changed, 181 insertions(+), 25 deletions(-) diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h index aa1ab0cb80ab..f6fa0b9f83a8 100644 --- a/kernel/trace/trace.h +++ b/kernel/trace/trace.h @@ -726,6 +726,12 @@ static inline void trace_branch_disable(void) } #endif /* CONFIG_BRANCH_TRACER */ +/* trace event type bit fields, not numeric */ +enum { + TRACE_EVENT_TYPE_PRINTF = 1, + TRACE_EVENT_TYPE_RAW = 2, +}; + struct ftrace_event_call { char *name; char *system; @@ -736,6 +742,7 @@ struct ftrace_event_call { int id; struct dentry *raw_dir; int raw_enabled; + int type; int (*raw_init)(void); int (*raw_reg)(void); void (*raw_unreg)(void); diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c index 77a5c02bd634..1d07f800a9ce 100644 --- a/kernel/trace/trace_events.c +++ b/kernel/trace/trace_events.c @@ -44,6 +44,36 @@ static void ftrace_clear_events(void) } } +static void ftrace_event_enable_disable(struct ftrace_event_call *call, + int enable) +{ + + switch (enable) { + case 0: + if (call->enabled) { + call->enabled = 0; + call->unregfunc(); + } + if (call->raw_enabled) { + call->raw_enabled = 0; + call->raw_unreg(); + } + break; + case 1: + if (!call->enabled && + (call->type & TRACE_EVENT_TYPE_PRINTF)) { + call->enabled = 1; + call->regfunc(); + } + if (!call->raw_enabled && + (call->type & TRACE_EVENT_TYPE_RAW)) { + call->raw_enabled = 1; + call->raw_reg(); + } + break; + } +} + static int ftrace_set_clr_event(char *buf, int set) { struct ftrace_event_call *call = __start_ftrace_events; @@ -90,19 +120,8 @@ static int ftrace_set_clr_event(char *buf, int set) if (event && strcmp(event, call->name) != 0) continue; - if (set) { - /* Already set? */ - if (call->enabled) - return 0; - call->enabled = 1; - call->regfunc(); - } else { - /* Already cleared? */ - if (!call->enabled) - return 0; - call->enabled = 0; - call->unregfunc(); - } + ftrace_event_enable_disable(call, set); + ret = 0; } return ret; @@ -273,7 +292,7 @@ event_enable_read(struct file *filp, char __user *ubuf, size_t cnt, struct ftrace_event_call *call = filp->private_data; char *buf; - if (call->enabled) + if (call->enabled || call->raw_enabled) buf = "1\n"; else buf = "0\n"; @@ -304,18 +323,8 @@ event_enable_write(struct file *filp, const char __user *ubuf, size_t cnt, switch (val) { case 0: - if (!call->enabled) - break; - - call->enabled = 0; - call->unregfunc(); - break; case 1: - if (call->enabled) - break; - - call->enabled = 1; - call->regfunc(); + ftrace_event_enable_disable(call, val); break; default: @@ -327,6 +336,107 @@ event_enable_write(struct file *filp, const char __user *ubuf, size_t cnt, return cnt; } +static ssize_t +event_type_read(struct file *filp, char __user *ubuf, size_t cnt, + loff_t *ppos) +{ + struct ftrace_event_call *call = filp->private_data; + char buf[16]; + int r = 0; + + if (call->type & TRACE_EVENT_TYPE_PRINTF) + r += sprintf(buf, "printf\n"); + + if (call->type & TRACE_EVENT_TYPE_RAW) + r += sprintf(buf+r, "raw\n"); + + return simple_read_from_buffer(ubuf, cnt, ppos, buf, r); +} + +static ssize_t +event_type_write(struct file *filp, const char __user *ubuf, size_t cnt, + loff_t *ppos) +{ + struct ftrace_event_call *call = filp->private_data; + char buf[64]; + + /* + * If there's only one type, we can't change it. + * And currently we always have printf type, and we + * may or may not have raw type. + * + * This is a redundant check, the file should be read + * only if this is the case anyway. + */ + + if (!call->raw_init) + return -EPERM; + + if (cnt >= sizeof(buf)) + return -EINVAL; + + if (copy_from_user(&buf, ubuf, cnt)) + return -EFAULT; + + buf[cnt] = 0; + + if (!strncmp(buf, "printf", 6) && + (!buf[6] || isspace(buf[6]))) { + + call->type = TRACE_EVENT_TYPE_PRINTF; + + /* + * If raw enabled, the disable it and enable + * printf type. + */ + if (call->raw_enabled) { + call->raw_enabled = 0; + call->raw_unreg(); + + call->enabled = 1; + call->regfunc(); + } + + } else if (!strncmp(buf, "raw", 3) && + (!buf[3] || isspace(buf[3]))) { + + call->type = TRACE_EVENT_TYPE_RAW; + + /* + * If printf enabled, the disable it and enable + * raw type. + */ + if (call->enabled) { + call->enabled = 0; + call->unregfunc(); + + call->raw_enabled = 1; + call->raw_reg(); + } + } else + return -EINVAL; + + *ppos += cnt; + + return cnt; +} + +static ssize_t +event_available_types_read(struct file *filp, char __user *ubuf, size_t cnt, + loff_t *ppos) +{ + struct ftrace_event_call *call = filp->private_data; + char buf[16]; + int r = 0; + + r += sprintf(buf, "printf\n"); + + if (call->raw_init) + r += sprintf(buf+r, "raw\n"); + + return simple_read_from_buffer(ubuf, cnt, ppos, buf, r); +} + static const struct seq_operations show_event_seq_ops = { .start = t_start, .next = t_next, @@ -362,6 +472,17 @@ static const struct file_operations ftrace_enable_fops = { .write = event_enable_write, }; +static const struct file_operations ftrace_type_fops = { + .open = tracing_open_generic, + .read = event_type_read, + .write = event_type_write, +}; + +static const struct file_operations ftrace_available_types_fops = { + .open = tracing_open_generic, + .read = event_available_types_read, +}; + static struct dentry *event_trace_events_dir(void) { static struct dentry *d_tracer; @@ -427,6 +548,7 @@ static int event_create_dir(struct ftrace_event_call *call, struct dentry *d_events) { struct dentry *entry; + int ret; /* * If the trace point header did not define TRACE_SYSTEM @@ -435,6 +557,18 @@ event_create_dir(struct ftrace_event_call *call, struct dentry *d_events) if (strcmp(call->system, "TRACE_SYSTEM") != 0) d_events = event_subsystem_dir(call->system, d_events); + if (call->raw_init) { + ret = call->raw_init(); + if (ret < 0) { + pr_warning("Could not initialize trace point" + " events/%s\n", call->name); + return ret; + } + } + + /* default the output to printf */ + call->type = TRACE_EVENT_TYPE_PRINTF; + call->dir = debugfs_create_dir(call->name, d_events); if (!call->dir) { pr_warning("Could not create debugfs " @@ -448,6 +582,21 @@ event_create_dir(struct ftrace_event_call *call, struct dentry *d_events) pr_warning("Could not create debugfs " "'%s/enable' entry\n", call->name); + /* Only let type be writable, if we can change it */ + entry = debugfs_create_file("type", + call->raw_init ? 0644 : 0444, + call->dir, call, + &ftrace_type_fops); + if (!entry) + pr_warning("Could not create debugfs " + "'%s/type' entry\n", call->name); + + entry = debugfs_create_file("available_types", 0444, call->dir, call, + &ftrace_available_types_fops); + if (!entry) + pr_warning("Could not create debugfs " + "'%s/type' available_types\n", call->name); + return 0; } From 629928041c53771f9902753d50fef6b35f36d33d Mon Sep 17 00:00:00 2001 From: Steven Rostedt Date: Sat, 28 Feb 2009 02:47:59 -0500 Subject: [PATCH 09/10] tracing: create the C style tracing for the sched subsystem This patch utilizes the TRACE_EVENT_FORMAT macro to enable the C style faster tracing for the sched subsystem trace points. Signed-off-by: Steven Rostedt --- include/linux/tracepoint.h | 3 + include/trace/sched_event_types.h | 119 +++++++++++++++++++++++------- 2 files changed, 97 insertions(+), 25 deletions(-) diff --git a/include/linux/tracepoint.h b/include/linux/tracepoint.h index 62d13391a240..152b2f03fb86 100644 --- a/include/linux/tracepoint.h +++ b/include/linux/tracepoint.h @@ -157,4 +157,7 @@ static inline void tracepoint_synchronize_unregister(void) #define TRACE_FORMAT(name, proto, args, fmt) \ DECLARE_TRACE(name, PARAMS(proto), PARAMS(args)) +#define TRACE_EVENT_FORMAT(name, proto, args, fmt, struct, tpfmt) \ + TRACE_FORMAT(name, PARAMS(proto), PARAMS(args), PARAMS(fmt)) + #endif diff --git a/include/trace/sched_event_types.h b/include/trace/sched_event_types.h index 2ada206565a3..ba059c10b58a 100644 --- a/include/trace/sched_event_types.h +++ b/include/trace/sched_event_types.h @@ -1,6 +1,6 @@ /* use instead */ -#ifndef TRACE_FORMAT +#ifndef TRACE_EVENT_FORMAT # error Do not include this file directly. # error Unless you know what you are doing. #endif @@ -8,70 +8,139 @@ #undef TRACE_SYSTEM #define TRACE_SYSTEM sched -TRACE_FORMAT(sched_kthread_stop, +TRACE_EVENT_FORMAT(sched_kthread_stop, TPPROTO(struct task_struct *t), TPARGS(t), - TPFMT("task %s:%d", t->comm, t->pid)); + TPFMT("task %s:%d", t->comm, t->pid), + TRACE_STRUCT( + TRACE_FIELD(pid_t, pid, t->pid) + ), + TPRAWFMT("task %d") + ); -TRACE_FORMAT(sched_kthread_stop_ret, +TRACE_EVENT_FORMAT(sched_kthread_stop_ret, TPPROTO(int ret), TPARGS(ret), - TPFMT("ret=%d", ret)); + TPFMT("ret=%d", ret), + TRACE_STRUCT( + TRACE_FIELD(int, ret, ret) + ), + TPRAWFMT("ret=%d") + ); -TRACE_FORMAT(sched_wait_task, +TRACE_EVENT_FORMAT(sched_wait_task, TPPROTO(struct rq *rq, struct task_struct *p), TPARGS(rq, p), - TPFMT("task %s:%d", p->comm, p->pid)); + TPFMT("task %s:%d", p->comm, p->pid), + TRACE_STRUCT( + TRACE_FIELD(pid_t, pid, p->pid) + ), + TPRAWFMT("task %d") + ); -TRACE_FORMAT(sched_wakeup, +TRACE_EVENT_FORMAT(sched_wakeup, TPPROTO(struct rq *rq, struct task_struct *p, int success), TPARGS(rq, p, success), TPFMT("task %s:%d %s", - p->comm, p->pid, success?"succeeded":"failed")); + p->comm, p->pid, success ? "succeeded" : "failed"), + TRACE_STRUCT( + TRACE_FIELD(pid_t, pid, p->pid) + TRACE_FIELD(int, success, success) + ), + TPRAWFMT("task %d success=%d") + ); -TRACE_FORMAT(sched_wakeup_new, +TRACE_EVENT_FORMAT(sched_wakeup_new, TPPROTO(struct rq *rq, struct task_struct *p, int success), TPARGS(rq, p, success), TPFMT("task %s:%d", - p->comm, p->pid, success?"succeeded":"failed")); + p->comm, p->pid, success ? "succeeded" : "failed"), + TRACE_STRUCT( + TRACE_FIELD(pid_t, pid, p->pid) + TRACE_FIELD(int, success, success) + ), + TPRAWFMT("task %d success=%d") + ); -TRACE_FORMAT(sched_switch, +TRACE_EVENT_FORMAT(sched_switch, TPPROTO(struct rq *rq, struct task_struct *prev, struct task_struct *next), TPARGS(rq, prev, next), TPFMT("task %s:%d ==> %s:%d", - prev->comm, prev->pid, next->comm, next->pid)); + prev->comm, prev->pid, next->comm, next->pid), + TRACE_STRUCT( + TRACE_FIELD(pid_t, prev_pid, prev->pid) + TRACE_FIELD(int, prev_prio, prev->prio) + TRACE_FIELD(pid_t, next_pid, next->pid) + TRACE_FIELD(int, next_prio, next->prio) + ), + TPRAWFMT("prev %d:%d ==> next %d:%d") + ); -TRACE_FORMAT(sched_migrate_task, +TRACE_EVENT_FORMAT(sched_migrate_task, TPPROTO(struct task_struct *p, int orig_cpu, int dest_cpu), TPARGS(p, orig_cpu, dest_cpu), TPFMT("task %s:%d from: %d to: %d", - p->comm, p->pid, orig_cpu, dest_cpu)); + p->comm, p->pid, orig_cpu, dest_cpu), + TRACE_STRUCT( + TRACE_FIELD(pid_t, pid, p->pid) + TRACE_FIELD(int, orig_cpu, orig_cpu) + TRACE_FIELD(int, dest_cpu, dest_cpu) + ), + TPRAWFMT("task %d from: %d to: %d") + ); -TRACE_FORMAT(sched_process_free, +TRACE_EVENT_FORMAT(sched_process_free, TPPROTO(struct task_struct *p), TPARGS(p), - TPFMT("task %s:%d", p->comm, p->pid)); + TPFMT("task %s:%d", p->comm, p->pid), + TRACE_STRUCT( + TRACE_FIELD(pid_t, pid, p->pid) + ), + TPRAWFMT("task %d") + ); -TRACE_FORMAT(sched_process_exit, +TRACE_EVENT_FORMAT(sched_process_exit, TPPROTO(struct task_struct *p), TPARGS(p), - TPFMT("task %s:%d", p->comm, p->pid)); + TPFMT("task %s:%d", p->comm, p->pid), + TRACE_STRUCT( + TRACE_FIELD(pid_t, pid, p->pid) + ), + TPRAWFMT("task %d") + ); -TRACE_FORMAT(sched_process_wait, +TRACE_EVENT_FORMAT(sched_process_wait, TPPROTO(struct pid *pid), TPARGS(pid), - TPFMT("pid %d", pid)); + TPFMT("pid %d", pid_nr(pid)), + TRACE_STRUCT( + TRACE_FIELD(pid_t, pid, pid_nr(pid)) + ), + TPRAWFMT("task %d") + ); -TRACE_FORMAT(sched_process_fork, +TRACE_EVENT_FORMAT(sched_process_fork, TPPROTO(struct task_struct *parent, struct task_struct *child), TPARGS(parent, child), TPFMT("parent %s:%d child %s:%d", - parent->comm, parent->pid, child->comm, child->pid)); + parent->comm, parent->pid, child->comm, child->pid), + TRACE_STRUCT( + TRACE_FIELD(pid_t, parent, parent->pid) + TRACE_FIELD(pid_t, child, child->pid) + ), + TPRAWFMT("parent %d child %d") + ); -TRACE_FORMAT(sched_signal_send, +TRACE_EVENT_FORMAT(sched_signal_send, TPPROTO(int sig, struct task_struct *p), TPARGS(sig, p), - TPFMT("sig: %d task %s:%d", sig, p->comm, p->pid)); + TPFMT("sig: %d task %s:%d", sig, p->comm, p->pid), + TRACE_STRUCT( + TRACE_FIELD(int, sig, sig) + TRACE_FIELD(pid_t, pid, p->pid) + ), + TPRAWFMT("sig: %d task %d") + ); #undef TRACE_SYSTEM From f2034f1e1adaac6713a6d48b5a2d4f3aa3e63ccb Mon Sep 17 00:00:00 2001 From: Steven Rostedt Date: Sat, 28 Feb 2009 02:54:39 -0500 Subject: [PATCH 10/10] tracing: create the C style tracing for the irq subsystem This patch utilizes the TRACE_EVENT_FORMAT macro to enable the C style faster tracing for the irq subsystem trace points. Signed-off-by: Steven Rostedt --- include/trace/irq_event_types.h | 19 +++++++++++++++---- 1 file changed, 15 insertions(+), 4 deletions(-) diff --git a/include/trace/irq_event_types.h b/include/trace/irq_event_types.h index 47a2be1b2d7d..65850bc5ea06 100644 --- a/include/trace/irq_event_types.h +++ b/include/trace/irq_event_types.h @@ -8,15 +8,26 @@ #undef TRACE_SYSTEM #define TRACE_SYSTEM irq -TRACE_FORMAT(irq_handler_entry, +TRACE_EVENT_FORMAT(irq_handler_entry, TPPROTO(int irq, struct irqaction *action), TPARGS(irq, action), - TPFMT("irq=%d handler=%s", irq, action->name)); + TPFMT("irq=%d handler=%s", irq, action->name), + TRACE_STRUCT( + TRACE_FIELD(int, irq, irq) + ), + TPRAWFMT("irq %d") + ); -TRACE_FORMAT(irq_handler_exit, +TRACE_EVENT_FORMAT(irq_handler_exit, TPPROTO(int irq, struct irqaction *action, int ret), TPARGS(irq, action, ret), TPFMT("irq=%d handler=%s return=%s", - irq, action->name, ret ? "handled" : "unhandled")); + irq, action->name, ret ? "handled" : "unhandled"), + TRACE_STRUCT( + TRACE_FIELD(int, irq, irq) + TRACE_FIELD(int, ret, ret) + ), + TPRAWFMT("irq %d ret %d") + ); #undef TRACE_SYSTEM