* [RFC][PATCH] tracing: Make branch trace display correct header
@ 2009-04-13 8:02 Zhaolei
2009-04-13 16:43 ` Frederic Weisbecker
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: Zhaolei @ 2009-04-13 8:02 UTC (permalink / raw)
To: Steven Rostedt, Frederic Weisbecker, Tom Zanussi, Ingo Molnar
Cc: linux-kernel
Before patch:
# tracer: branch
#
# TASK-PID CPU# TIMESTAMP FUNCTION
# | | | | |
<...>-2981 [000] 24008.872738: [ ok ] trace_irq_handler_exit:irq_event_types.h:41
<...>-2981 [000] 24008.872742: [ ok ] note_interrupt:spurious.c:229
...
After patch:
# tracer: branch
#
# TASK-PID CPU# TIMESTAMP CORRECT FUNC:FILE:LINE
# | | | | | |
<...>-2985 [000] 26329.142970: [ ok ] slab_free:slub.c:1776
<...>-2985 [000] 26329.142972: [ ok ] trace_kmem_cache_free:kmem_event_types.h:191
...
But it is not the best fix way.
When format(length) of TASK-PID, CPU and TIMESTAMP chanegd in trace.c,
other files who uses there fields need to changed for print right header line.
Maybe we can make a function to print header line of these 3 field:
print_common_head()
{
seq_puts(s, "# TASK-PID CPU# TIMESTAMP");
}
and call this function in other files' print_header:
static void branch_print_header(struct seq_file *s)
{
print_common_head();
seq_puts(s, " CORRECT FUNC:FILE:LINE\n");
}
But if header line is multi-line, this way can't work.
Another way is to export specific header-line content in other files:
static void branch_print_header(char *buf, int len)
{
strcpy(buf, " CORRECT FUNC:FILE:LINE\n"
" | |\n"
);
}
And combile common-header and specific header in trace.c, then do seq_puts.
But this seems too complex for tracing framework.
Similar problem exists in other tracers as sched_switch.
Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com>
---
kernel/trace/trace_branch.c | 8 ++++++++
1 files changed, 8 insertions(+), 0 deletions(-)
diff --git a/kernel/trace/trace_branch.c b/kernel/trace/trace_branch.c
index 8e64e60..7a7a9fd 100644
--- a/kernel/trace/trace_branch.c
+++ b/kernel/trace/trace_branch.c
@@ -157,6 +157,13 @@ static enum print_line_t trace_branch_print(struct trace_iterator *iter,
return TRACE_TYPE_HANDLED;
}
+static void branch_print_header(struct seq_file *s)
+{
+ seq_puts(s, "# TASK-PID CPU# TIMESTAMP CORRECT"
+ " FUNC:FILE:LINE\n");
+ seq_puts(s, "# | | | | | "
+ " |\n");
+}
static struct trace_event trace_branch_event = {
.type = TRACE_BRANCH,
@@ -171,6 +178,7 @@ static struct tracer branch_trace __read_mostly =
#ifdef CONFIG_FTRACE_SELFTEST
.selftest = trace_selftest_startup_branch,
#endif /* CONFIG_FTRACE_SELFTEST */
+ .print_header = branch_print_header,
};
__init static int init_branch_tracer(void)
-- 1.5.5.3
^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [RFC][PATCH] tracing: Make branch trace display correct header
2009-04-13 8:02 [RFC][PATCH] tracing: Make branch trace display correct header Zhaolei
@ 2009-04-13 16:43 ` Frederic Weisbecker
2009-04-13 21:46 ` [tip:tracing/urgent] tracing: Fix branch trace header tip-bot for Zhaolei
2009-04-14 0:33 ` [tip:tracing/urgent] tracing: Fix branch tracer header tip-bot for Zhaolei
2 siblings, 0 replies; 4+ messages in thread
From: Frederic Weisbecker @ 2009-04-13 16:43 UTC (permalink / raw)
To: Zhaolei; +Cc: Steven Rostedt, Tom Zanussi, Ingo Molnar, linux-kernel
On Mon, Apr 13, 2009 at 04:02:34PM +0800, Zhaolei wrote:
> Before patch:
> # tracer: branch
> #
> # TASK-PID CPU# TIMESTAMP FUNCTION
> # | | | | |
> <...>-2981 [000] 24008.872738: [ ok ] trace_irq_handler_exit:irq_event_types.h:41
> <...>-2981 [000] 24008.872742: [ ok ] note_interrupt:spurious.c:229
> ...
>
> After patch:
> # tracer: branch
> #
> # TASK-PID CPU# TIMESTAMP CORRECT FUNC:FILE:LINE
> # | | | | | |
> <...>-2985 [000] 26329.142970: [ ok ] slab_free:slub.c:1776
> <...>-2985 [000] 26329.142972: [ ok ] trace_kmem_cache_free:kmem_event_types.h:191
> ...
>
> But it is not the best fix way.
> When format(length) of TASK-PID, CPU and TIMESTAMP chanegd in trace.c,
> other files who uses there fields need to changed for print right header line.
>
> Maybe we can make a function to print header line of these 3 field:
> print_common_head()
> {
> seq_puts(s, "# TASK-PID CPU# TIMESTAMP");
> }
>
> and call this function in other files' print_header:
> static void branch_print_header(struct seq_file *s)
> {
> print_common_head();
> seq_puts(s, " CORRECT FUNC:FILE:LINE\n");
> }
>
> But if header line is multi-line, this way can't work.
>
> Another way is to export specific header-line content in other files:
> static void branch_print_header(char *buf, int len)
> {
> strcpy(buf, " CORRECT FUNC:FILE:LINE\n"
> " | |\n"
> );
> }
> And combile common-header and specific header in trace.c, then do seq_puts.
> But this seems too complex for tracing framework.
>
> Similar problem exists in other tracers as sched_switch.
Indeed. I don't see any smart solution.
May be:
print_common_header_begin() // first line
print_common_header_end() // second line with pipes
That's not pretty but at least it factorizes...
Hm?
Frederic.
> Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com>
> ---
> kernel/trace/trace_branch.c | 8 ++++++++
> 1 files changed, 8 insertions(+), 0 deletions(-)
>
> diff --git a/kernel/trace/trace_branch.c b/kernel/trace/trace_branch.c
> index 8e64e60..7a7a9fd 100644
> --- a/kernel/trace/trace_branch.c
> +++ b/kernel/trace/trace_branch.c
> @@ -157,6 +157,13 @@ static enum print_line_t trace_branch_print(struct trace_iterator *iter,
> return TRACE_TYPE_HANDLED;
> }
>
> +static void branch_print_header(struct seq_file *s)
> +{
> + seq_puts(s, "# TASK-PID CPU# TIMESTAMP CORRECT"
> + " FUNC:FILE:LINE\n");
> + seq_puts(s, "# | | | | | "
> + " |\n");
> +}
>
> static struct trace_event trace_branch_event = {
> .type = TRACE_BRANCH,
> @@ -171,6 +178,7 @@ static struct tracer branch_trace __read_mostly =
> #ifdef CONFIG_FTRACE_SELFTEST
> .selftest = trace_selftest_startup_branch,
> #endif /* CONFIG_FTRACE_SELFTEST */
> + .print_header = branch_print_header,
> };
>
> __init static int init_branch_tracer(void)
> -- 1.5.5.3
>
^ permalink raw reply [flat|nested] 4+ messages in thread
* [tip:tracing/urgent] tracing: Fix branch trace header
2009-04-13 8:02 [RFC][PATCH] tracing: Make branch trace display correct header Zhaolei
2009-04-13 16:43 ` Frederic Weisbecker
@ 2009-04-13 21:46 ` tip-bot for Zhaolei
2009-04-14 0:33 ` [tip:tracing/urgent] tracing: Fix branch tracer header tip-bot for Zhaolei
2 siblings, 0 replies; 4+ messages in thread
From: tip-bot for Zhaolei @ 2009-04-13 21:46 UTC (permalink / raw)
To: linux-tip-commits
Cc: linux-kernel, hpa, mingo, tzanussi, zhaolei, fweisbec, rostedt,
tglx, mingo
Commit-ID: fbe5e34d34152775434c6efde4dadb17a19e121a
Gitweb: http://git.kernel.org/tip/fbe5e34d34152775434c6efde4dadb17a19e121a
Author: Zhaolei <zhaolei@cn.fujitsu.com>
AuthorDate: Mon, 13 Apr 2009 16:02:34 +0800
Committer: Ingo Molnar <mingo@elte.hu>
CommitDate: Mon, 13 Apr 2009 23:42:42 +0200
tracing: Fix branch trace header
Before patch:
# tracer: branch
#
# TASK-PID CPU# TIMESTAMP FUNCTION
# | | | | |
<...>-2981 [000] 24008.872738: [ ok ] trace_irq_handler_exit:irq_event_types.h:41
<...>-2981 [000] 24008.872742: [ ok ] note_interrupt:spurious.c:229
...
After patch:
# tracer: branch
#
# TASK-PID CPU# TIMESTAMP CORRECT FUNC:FILE:LINE
# | | | | | |
<...>-2985 [000] 26329.142970: [ ok ] slab_free:slub.c:1776
<...>-2985 [000] 26329.142972: [ ok ] trace_kmem_cache_free:kmem_event_types.h:191
...
Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com>
Acked-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Tom Zanussi <tzanussi@gmail.com>
LKML-Reference: <49E2F19A.3040006@cn.fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---
kernel/trace/trace_branch.c | 8 ++++++++
1 files changed, 8 insertions(+), 0 deletions(-)
diff --git a/kernel/trace/trace_branch.c b/kernel/trace/trace_branch.c
index ad8c22e..8333715 100644
--- a/kernel/trace/trace_branch.c
+++ b/kernel/trace/trace_branch.c
@@ -155,6 +155,13 @@ static enum print_line_t trace_branch_print(struct trace_iterator *iter,
return TRACE_TYPE_HANDLED;
}
+static void branch_print_header(struct seq_file *s)
+{
+ seq_puts(s, "# TASK-PID CPU# TIMESTAMP CORRECT"
+ " FUNC:FILE:LINE\n");
+ seq_puts(s, "# | | | | | "
+ " |\n");
+}
static struct trace_event trace_branch_event = {
.type = TRACE_BRANCH,
@@ -169,6 +176,7 @@ static struct tracer branch_trace __read_mostly =
#ifdef CONFIG_FTRACE_SELFTEST
.selftest = trace_selftest_startup_branch,
#endif /* CONFIG_FTRACE_SELFTEST */
+ .print_header = branch_print_header,
};
__init static int init_branch_tracer(void)
^ permalink raw reply related [flat|nested] 4+ messages in thread
* [tip:tracing/urgent] tracing: Fix branch tracer header
2009-04-13 8:02 [RFC][PATCH] tracing: Make branch trace display correct header Zhaolei
2009-04-13 16:43 ` Frederic Weisbecker
2009-04-13 21:46 ` [tip:tracing/urgent] tracing: Fix branch trace header tip-bot for Zhaolei
@ 2009-04-14 0:33 ` tip-bot for Zhaolei
2 siblings, 0 replies; 4+ messages in thread
From: tip-bot for Zhaolei @ 2009-04-14 0:33 UTC (permalink / raw)
To: linux-tip-commits
Cc: linux-kernel, hpa, mingo, tzanussi, zhaolei, fweisbec, rostedt,
tglx, mingo
Commit-ID: 557055bebe9212dfa6b9f5df811dfd0dac77ec55
Gitweb: http://git.kernel.org/tip/557055bebe9212dfa6b9f5df811dfd0dac77ec55
Author: Zhaolei <zhaolei@cn.fujitsu.com>
AuthorDate: Mon, 13 Apr 2009 16:02:34 +0800
Committer: Ingo Molnar <mingo@elte.hu>
CommitDate: Tue, 14 Apr 2009 02:30:36 +0200
tracing: Fix branch tracer header
Before patch:
# tracer: branch
#
# TASK-PID CPU# TIMESTAMP FUNCTION
# | | | | |
<...>-2981 [000] 24008.872738: [ ok ] trace_irq_handler_exit:irq_event_types.h:41
<...>-2981 [000] 24008.872742: [ ok ] note_interrupt:spurious.c:229
...
After patch:
# tracer: branch
#
# TASK-PID CPU# TIMESTAMP CORRECT FUNC:FILE:LINE
# | | | | | |
<...>-2985 [000] 26329.142970: [ ok ] slab_free:slub.c:1776
<...>-2985 [000] 26329.142972: [ ok ] trace_kmem_cache_free:kmem_event_types.h:191
...
Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com>
Acked-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Tom Zanussi <tzanussi@gmail.com>
LKML-Reference: <49E2F19A.3040006@cn.fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---
kernel/trace/trace_branch.c | 8 ++++++++
1 files changed, 8 insertions(+), 0 deletions(-)
diff --git a/kernel/trace/trace_branch.c b/kernel/trace/trace_branch.c
index ad8c22e..8333715 100644
--- a/kernel/trace/trace_branch.c
+++ b/kernel/trace/trace_branch.c
@@ -155,6 +155,13 @@ static enum print_line_t trace_branch_print(struct trace_iterator *iter,
return TRACE_TYPE_HANDLED;
}
+static void branch_print_header(struct seq_file *s)
+{
+ seq_puts(s, "# TASK-PID CPU# TIMESTAMP CORRECT"
+ " FUNC:FILE:LINE\n");
+ seq_puts(s, "# | | | | | "
+ " |\n");
+}
static struct trace_event trace_branch_event = {
.type = TRACE_BRANCH,
@@ -169,6 +176,7 @@ static struct tracer branch_trace __read_mostly =
#ifdef CONFIG_FTRACE_SELFTEST
.selftest = trace_selftest_startup_branch,
#endif /* CONFIG_FTRACE_SELFTEST */
+ .print_header = branch_print_header,
};
__init static int init_branch_tracer(void)
^ permalink raw reply related [flat|nested] 4+ messages in thread
end of thread, other threads:[~2009-04-14 0:34 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz follow: Atom feed
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2009-04-13 8:02 [RFC][PATCH] tracing: Make branch trace display correct header Zhaolei
2009-04-13 16:43 ` Frederic Weisbecker
2009-04-13 21:46 ` [tip:tracing/urgent] tracing: Fix branch trace header tip-bot for Zhaolei
2009-04-14 0:33 ` [tip:tracing/urgent] tracing: Fix branch tracer header tip-bot for Zhaolei
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