Re: [PATCH v2 01/15] perf ftrace: select function/function_graph tracer automatically
On Fri, Jul 03, 2020 at 02:47:09PM +0900, Namhyung Kim wrote:
> Hello,
>
> On Sat, Jun 27, 2020 at 10:37 PM Changbin Du wrote:
> >
> > The '-g/-G' options have already implied function_graph tracer should be
> > used instead of function tracer. So the extra option '--tracer' can be
> > killed.
> >
> > This patch changes the behavior as below:
> > - By default, function tracer is used.
> > - If '-g' or '-G' option is on, then function_graph tracer is used.
> > - The perf configuration item 'ftrace.tracer' is marked as deprecated.
> > - The option '--tracer' is marked as deprecated.
> > - The default filter for -G/-T is to trace all functions.
> >
> > Here are some examples.
> >
> > This will start tracing all functions using function tracer:
> > $ sudo perf ftrace
> >
> > This will trace all functions using function graph tracer:
> > $ sudo perf ftrace -G
> >
> > This will trace function vfs_read using function graph tracer:
> > $ sudo perf ftrace -G vfs_read
>
> As we support running a new task on the command line, it might
> confuse users whether it's an argument of -G option or a task to run.
> One can use -- to separate them but it's easy to miss..
>
yes, it is a bit confusing. How about remove the default value '*'?
> Thanks
> Namhyung
>
>
> >
> > Signed-off-by: Changbin Du
> > ---
> > tools/perf/Documentation/perf-config.txt | 5 -
> > tools/perf/Documentation/perf-ftrace.txt | 2 +-
> > tools/perf/builtin-ftrace.c | 19 ---
> > 3 files changed, 13 insertions(+), 13 deletions(-)
> >
> > diff --git a/tools/perf/Documentation/perf-config.txt
> > b/tools/perf/Documentation/perf-config.txt
> > index c7d3df5798e2..a25fee7de3b2 100644
> > --- a/tools/perf/Documentation/perf-config.txt
> > +++ b/tools/perf/Documentation/perf-config.txt
> > @@ -612,11 +612,6 @@ trace.*::
> > "libbeauty", the default, to use the same argument
> > beautifiers used in the
> > strace-like sys_enter+sys_exit lines.
> >
> > -ftrace.*::
> > - ftrace.tracer::
> > - Can be used to select the default tracer. Possible values
> > are
> > - 'function' and 'function_graph'.
> > -
> > llvm.*::
> > llvm.clang-path::
> > Path to clang. If omit, search it from $PATH.
> > diff --git a/tools/perf/Documentation/perf-ftrace.txt
> > b/tools/perf/Documentation/perf-ftrace.txt
> > index b80c84307dc9..952e46669168 100644
> > --- a/tools/perf/Documentation/perf-ftrace.txt
> > +++ b/tools/perf/Documentation/perf-ftrace.txt
> > @@ -24,7 +24,7 @@ OPTIONS
> >
> > -t::
> > --tracer=::
> > - Tracer to use: function_graph or function.
> > + Tracer to use: function_graph or function. This option is
> > deprecated.
> >
> > -v::
> > --verbose=::
> > diff --git a/tools/perf/builtin-ftrace.c b/tools/perf/builtin-ftrace.c
> > index 2bfc1b0db536..c5718503eded 100644
> > --- a/tools/perf/builtin-ftrace.c
> > +++ b/tools/perf/builtin-ftrace.c
> > @@ -27,7 +27,6 @@
> > #include "util/cap.h"
> > #include "util/config.h"
> >
> > -#define DEFAULT_TRACER "function_graph"
> >
> > struct perf_ftrace {
> > struct evlist *evlist;
> > @@ -419,6 +418,7 @@ static int perf_ftrace_config(const char *var, const
> > char *value, void *cb)
> > if (strcmp(var, "ftrace.tracer"))
> > return -1;
> >
> > + pr_warning("Configuration ftrace.tracer is deprecated\n");
> > if (!strcmp(value, "function_graph") ||
> > !strcmp(value, "function")) {
> > ftrace->tracer = value;
> > @@ -459,7 +459,7 @@ int cmd_ftrace(int argc, const char **argv)
> > {
> > int ret;
> > struct perf_ftrace ftrace = {
> > - .tracer = DEFAULT_TRACER,
> > + .tracer = "function",
> > .target = { .uid = UINT_MAX, },
> > };
> > const char * const ftrace_usage[] = {
> > @@ -469,7 +469,7 @@ int cmd_ftrace(int argc, const char **argv)
> > };
> > const struct option ftrace_options[] = {
> > OPT_STRING('t', "tracer", &ftrace.tracer, "tracer",
> > - "tracer to use: function_graph(default) or function"),
> > + "tracer to use: function or function_graph (This option
> > is deprecated)"),
> > OPT_STRING('p', "pid", &ftrace.target.pid, "pid",
> >"trace on existing process id"),
> > OPT_INCR('v', "verbose", &verbose,
> > @@ -478,12 +478,14 @@ int cmd_ftrace(int argc, const char **argv)
> > "system-wide collection from all CPUs"),
> > OPT_STRING('C', "cpu", &ftrace.target.cpu_list, "cpu",
> > "list of cpus to monitor"),
> > - OPT_CALLBACK('T', "trace-funcs", &ftrace.filters, "func",
> > -"trace given functions only", parse_filter_func),
> > + OPT_CALLBACK_DEFAULT('T', "trace-funcs", &ftrace.filters, "func",
> > +
Re: [PATCH v2 01/15] perf ftrace: select function/function_graph tracer automatically
Hello,
On Sat, Jun 27, 2020 at 10:37 PM Changbin Du wrote:
>
> The '-g/-G' options have already implied function_graph tracer should be
> used instead of function tracer. So the extra option '--tracer' can be
> killed.
>
> This patch changes the behavior as below:
> - By default, function tracer is used.
> - If '-g' or '-G' option is on, then function_graph tracer is used.
> - The perf configuration item 'ftrace.tracer' is marked as deprecated.
> - The option '--tracer' is marked as deprecated.
> - The default filter for -G/-T is to trace all functions.
>
> Here are some examples.
>
> This will start tracing all functions using function tracer:
> $ sudo perf ftrace
>
> This will trace all functions using function graph tracer:
> $ sudo perf ftrace -G
>
> This will trace function vfs_read using function graph tracer:
> $ sudo perf ftrace -G vfs_read
As we support running a new task on the command line, it might
confuse users whether it's an argument of -G option or a task to run.
One can use -- to separate them but it's easy to miss..
Thanks
Namhyung
>
> Signed-off-by: Changbin Du
> ---
> tools/perf/Documentation/perf-config.txt | 5 -
> tools/perf/Documentation/perf-ftrace.txt | 2 +-
> tools/perf/builtin-ftrace.c | 19 ---
> 3 files changed, 13 insertions(+), 13 deletions(-)
>
> diff --git a/tools/perf/Documentation/perf-config.txt
> b/tools/perf/Documentation/perf-config.txt
> index c7d3df5798e2..a25fee7de3b2 100644
> --- a/tools/perf/Documentation/perf-config.txt
> +++ b/tools/perf/Documentation/perf-config.txt
> @@ -612,11 +612,6 @@ trace.*::
> "libbeauty", the default, to use the same argument
> beautifiers used in the
> strace-like sys_enter+sys_exit lines.
>
> -ftrace.*::
> - ftrace.tracer::
> - Can be used to select the default tracer. Possible values are
> - 'function' and 'function_graph'.
> -
> llvm.*::
> llvm.clang-path::
> Path to clang. If omit, search it from $PATH.
> diff --git a/tools/perf/Documentation/perf-ftrace.txt
> b/tools/perf/Documentation/perf-ftrace.txt
> index b80c84307dc9..952e46669168 100644
> --- a/tools/perf/Documentation/perf-ftrace.txt
> +++ b/tools/perf/Documentation/perf-ftrace.txt
> @@ -24,7 +24,7 @@ OPTIONS
>
> -t::
> --tracer=::
> - Tracer to use: function_graph or function.
> + Tracer to use: function_graph or function. This option is deprecated.
>
> -v::
> --verbose=::
> diff --git a/tools/perf/builtin-ftrace.c b/tools/perf/builtin-ftrace.c
> index 2bfc1b0db536..c5718503eded 100644
> --- a/tools/perf/builtin-ftrace.c
> +++ b/tools/perf/builtin-ftrace.c
> @@ -27,7 +27,6 @@
> #include "util/cap.h"
> #include "util/config.h"
>
> -#define DEFAULT_TRACER "function_graph"
>
> struct perf_ftrace {
> struct evlist *evlist;
> @@ -419,6 +418,7 @@ static int perf_ftrace_config(const char *var, const char
> *value, void *cb)
> if (strcmp(var, "ftrace.tracer"))
> return -1;
>
> + pr_warning("Configuration ftrace.tracer is deprecated\n");
> if (!strcmp(value, "function_graph") ||
> !strcmp(value, "function")) {
> ftrace->tracer = value;
> @@ -459,7 +459,7 @@ int cmd_ftrace(int argc, const char **argv)
> {
> int ret;
> struct perf_ftrace ftrace = {
> - .tracer = DEFAULT_TRACER,
> + .tracer = "function",
> .target = { .uid = UINT_MAX, },
> };
> const char * const ftrace_usage[] = {
> @@ -469,7 +469,7 @@ int cmd_ftrace(int argc, const char **argv)
> };
> const struct option ftrace_options[] = {
> OPT_STRING('t', "tracer", &ftrace.tracer, "tracer",
> - "tracer to use: function_graph(default) or function"),
> + "tracer to use: function or function_graph (This option is
> deprecated)"),
> OPT_STRING('p', "pid", &ftrace.target.pid, "pid",
>"trace on existing process id"),
> OPT_INCR('v', "verbose", &verbose,
> @@ -478,12 +478,14 @@ int cmd_ftrace(int argc, const char **argv)
> "system-wide collection from all CPUs"),
> OPT_STRING('C', "cpu", &ftrace.target.cpu_list, "cpu",
> "list of cpus to monitor"),
> - OPT_CALLBACK('T', "trace-funcs", &ftrace.filters, "func",
> -"trace given functions only", parse_filter_func),
> + OPT_CALLBACK_DEFAULT('T', "trace-funcs", &ftrace.filters, "func",
> +"trace given functions using function tracer",
> +parse_filter_func, "*"),
> OPT_CALLBACK('N', "notrace-funcs", &ftrace.notrace, "func",
> "do not trace given functions", parse_filter_func),
> - OPT_CALLBACK('G', "graph-funcs", &ftrace.graph_funcs, "func",
> -"Set graph filter on given functions
[PATCH v2 01/15] perf ftrace: select function/function_graph tracer automatically
The '-g/-G' options have already implied function_graph tracer should be
used instead of function tracer. So the extra option '--tracer' can be
killed.
This patch changes the behavior as below:
- By default, function tracer is used.
- If '-g' or '-G' option is on, then function_graph tracer is used.
- The perf configuration item 'ftrace.tracer' is marked as deprecated.
- The option '--tracer' is marked as deprecated.
- The default filter for -G/-T is to trace all functions.
Here are some examples.
This will start tracing all functions using function tracer:
$ sudo perf ftrace
This will trace all functions using function graph tracer:
$ sudo perf ftrace -G
This will trace function vfs_read using function graph tracer:
$ sudo perf ftrace -G vfs_read
Signed-off-by: Changbin Du
---
tools/perf/Documentation/perf-config.txt | 5 -
tools/perf/Documentation/perf-ftrace.txt | 2 +-
tools/perf/builtin-ftrace.c | 19 ---
3 files changed, 13 insertions(+), 13 deletions(-)
diff --git a/tools/perf/Documentation/perf-config.txt
b/tools/perf/Documentation/perf-config.txt
index c7d3df5798e2..a25fee7de3b2 100644
--- a/tools/perf/Documentation/perf-config.txt
+++ b/tools/perf/Documentation/perf-config.txt
@@ -612,11 +612,6 @@ trace.*::
"libbeauty", the default, to use the same argument beautifiers
used in the
strace-like sys_enter+sys_exit lines.
-ftrace.*::
- ftrace.tracer::
- Can be used to select the default tracer. Possible values are
- 'function' and 'function_graph'.
-
llvm.*::
llvm.clang-path::
Path to clang. If omit, search it from $PATH.
diff --git a/tools/perf/Documentation/perf-ftrace.txt
b/tools/perf/Documentation/perf-ftrace.txt
index b80c84307dc9..952e46669168 100644
--- a/tools/perf/Documentation/perf-ftrace.txt
+++ b/tools/perf/Documentation/perf-ftrace.txt
@@ -24,7 +24,7 @@ OPTIONS
-t::
--tracer=::
- Tracer to use: function_graph or function.
+ Tracer to use: function_graph or function. This option is deprecated.
-v::
--verbose=::
diff --git a/tools/perf/builtin-ftrace.c b/tools/perf/builtin-ftrace.c
index 2bfc1b0db536..c5718503eded 100644
--- a/tools/perf/builtin-ftrace.c
+++ b/tools/perf/builtin-ftrace.c
@@ -27,7 +27,6 @@
#include "util/cap.h"
#include "util/config.h"
-#define DEFAULT_TRACER "function_graph"
struct perf_ftrace {
struct evlist *evlist;
@@ -419,6 +418,7 @@ static int perf_ftrace_config(const char *var, const char
*value, void *cb)
if (strcmp(var, "ftrace.tracer"))
return -1;
+ pr_warning("Configuration ftrace.tracer is deprecated\n");
if (!strcmp(value, "function_graph") ||
!strcmp(value, "function")) {
ftrace->tracer = value;
@@ -459,7 +459,7 @@ int cmd_ftrace(int argc, const char **argv)
{
int ret;
struct perf_ftrace ftrace = {
- .tracer = DEFAULT_TRACER,
+ .tracer = "function",
.target = { .uid = UINT_MAX, },
};
const char * const ftrace_usage[] = {
@@ -469,7 +469,7 @@ int cmd_ftrace(int argc, const char **argv)
};
const struct option ftrace_options[] = {
OPT_STRING('t', "tracer", &ftrace.tracer, "tracer",
- "tracer to use: function_graph(default) or function"),
+ "tracer to use: function or function_graph (This option is
deprecated)"),
OPT_STRING('p', "pid", &ftrace.target.pid, "pid",
"trace on existing process id"),
OPT_INCR('v', "verbose", &verbose,
@@ -478,12 +478,14 @@ int cmd_ftrace(int argc, const char **argv)
"system-wide collection from all CPUs"),
OPT_STRING('C', "cpu", &ftrace.target.cpu_list, "cpu",
"list of cpus to monitor"),
- OPT_CALLBACK('T', "trace-funcs", &ftrace.filters, "func",
-"trace given functions only", parse_filter_func),
+ OPT_CALLBACK_DEFAULT('T', "trace-funcs", &ftrace.filters, "func",
+"trace given functions using function tracer",
+parse_filter_func, "*"),
OPT_CALLBACK('N', "notrace-funcs", &ftrace.notrace, "func",
"do not trace given functions", parse_filter_func),
- OPT_CALLBACK('G', "graph-funcs", &ftrace.graph_funcs, "func",
-"Set graph filter on given functions", parse_filter_func),
+ OPT_CALLBACK_DEFAULT('G', "graph-funcs", &ftrace.graph_funcs, "func",
+"trace given functions using function_graph
tracer",
+parse_filter_func, "*"),
OPT_CALLBACK('g', "nograph-funcs", &ftrace.nograph_funcs, "func",
"Set nograph filter on given functions",
parse_filter_func),
OPT_INTEGER('D', "graph-depth", &ftrace.graph_depth,
@@ -505,6 +507,9 @@ int c
