We need to synthesize events first, because some
features works on top of them (on report side).
Link: http://lkml.kernel.org/n/[email protected]
Signed-off-by: Jiri Olsa <[email protected]>
---
tools/perf/builtin-record.c | 18 +++++++++++-------
1 file changed, 11 insertions(+), 7 deletions(-)
diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index d33103291b02..22ebeb92ac51 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -754,13 +754,10 @@ static int record__synthesize(struct record *rec, bool tail)
return 0;
if (data->is_pipe) {
- err = perf_event__synthesize_features(
- tool, session, rec->evlist, process_synthesized_event);
- if (err < 0) {
- pr_err("Couldn't synthesize features.\n");
- return err;
- }
-
+ /*
+ * We need to synthesize events first, because some
+ * features works on top of them (on report side).
+ */
err = perf_event__synthesize_attrs(tool, session,
process_synthesized_event);
if (err < 0) {
@@ -768,6 +765,13 @@ static int record__synthesize(struct record *rec, bool tail)
goto out;
}
+ err = perf_event__synthesize_features(tool, session, rec->evlist,
+ process_synthesized_event);
+ if (err < 0) {
+ pr_err("Couldn't synthesize features.\n");
+ return err;
+ }
+
if (have_tracepoints(&rec->evlist->entries)) {
/*
* FIXME err <= 0 here actually means that
--
2.13.6
Stephan reported a problem with forced leader in pipe mode,
where report does not force the group output. The reason is
that we don't force the leader in pipe mode.
This patch adds HEADER_LAST_FEATURE mark to have a point
where we have all events and features received, and
force the group if requested.
$ perf record --group -e '{cycles, instructions}' -o - kill | perf report -i - --group
SNIP
# Overhead Command Shared Object Symbol
# ................ ....... ................ .......................
#
28.36% 0.00% kill libc-2.25.so [.] __unregister_atfork
26.32% 0.00% kill libc-2.25.so [.] _dl_addr
26.10% 0.00% kill ld-2.25.so [.] _dl_relocate_object
17.32% 0.00% kill ld-2.25.so [.] __tunables_init
1.70% 0.01% kill [unknown] [k] 0xffffffffafa01a40
0.20% 0.00% kill ld-2.25.so [.] _start
0.00% 48.77% kill ld-2.25.so [.] do_lookup_x
0.00% 42.97% kill libc-2.25.so [.] _IO_getline
0.00% 6.35% kill ld-2.25.so [.] strcmp
0.00% 1.71% kill ld-2.25.so [.] _dl_sysdep_start
0.00% 0.19% kill ld-2.25.so [.] _dl_start
Link: http://lkml.kernel.org/n/[email protected]
Signed-off-by: Jiri Olsa <[email protected]>
---
tools/perf/builtin-report.c | 57 ++++++++++++++++++++++++++++++++++-----------
tools/perf/util/header.c | 11 ++++++++-
2 files changed, 53 insertions(+), 15 deletions(-)
diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index 971ccba85464..91da12975642 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -68,6 +68,7 @@ struct report {
bool header;
bool header_only;
bool nonany_branch_mode;
+ bool group_set;
int max_stack;
struct perf_read_values show_threads_values;
const char *pretty_printing_style;
@@ -193,6 +194,45 @@ static int hist_iter__branch_callback(struct hist_entry_iter *iter,
return err;
}
+/*
+ * Events in data file are not collect in groups, but we still want
+ * the group display. Set the artificial group and set the leader's
+ * forced_leader flag to notify the display code.
+ */
+static void setup_forced_leader(struct report *report,
+ struct perf_evlist *evlist)
+{
+ if (report->group_set && !evlist->nr_groups) {
+ struct perf_evsel *leader = perf_evlist__first(evlist);
+
+ perf_evlist__set_leader(evlist);
+ leader->forced_leader = true;
+ }
+}
+
+static int process_feature_event(struct perf_tool *tool,
+ union perf_event *event,
+ struct perf_session *session __maybe_unused)
+{
+ struct report *rep = container_of(tool, struct report, tool);
+
+ if (event->feat.feat_id < HEADER_LAST_FEATURE)
+ return perf_event__process_feature(tool, event, session);
+
+ if (event->feat.feat_id != HEADER_LAST_FEATURE) {
+ pr_err("failed: wrong feature ID: %" PRIu64 "\n",
+ event->feat.feat_id);
+ return -1;
+ }
+
+ /*
+ * All features are received, we can force the
+ * group if needed.
+ */
+ setup_forced_leader(rep, session->evlist);
+ return 0;
+}
+
static int process_sample_event(struct perf_tool *tool,
union perf_event *event,
struct perf_sample *sample,
@@ -940,7 +980,6 @@ int cmd_report(int argc, const char **argv)
"perf report [<options>]",
NULL
};
- bool group_set = false;
struct report report = {
.tool = {
.sample = process_sample_event,
@@ -958,7 +997,7 @@ int cmd_report(int argc, const char **argv)
.id_index = perf_event__process_id_index,
.auxtrace_info = perf_event__process_auxtrace_info,
.auxtrace = perf_event__process_auxtrace,
- .feature = perf_event__process_feature,
+ .feature = process_feature_event,
.ordered_events = true,
.ordering_requires_timestamps = true,
},
@@ -1060,7 +1099,7 @@ int cmd_report(int argc, const char **argv)
"Specify disassembler style (e.g. -M intel for intel syntax)"),
OPT_BOOLEAN(0, "show-total-period", &symbol_conf.show_total_period,
"Show a column with the sum of periods"),
- OPT_BOOLEAN_SET(0, "group", &symbol_conf.event_group, &group_set,
+ OPT_BOOLEAN_SET(0, "group", &symbol_conf.event_group, &report.group_set,
"Show event group information together"),
OPT_CALLBACK_NOOPT('b', "branch-stack", &branch_mode, "",
"use branch records for per branch histogram filling",
@@ -1177,17 +1216,7 @@ int cmd_report(int argc, const char **argv)
has_br_stack = perf_header__has_feat(&session->header,
HEADER_BRANCH_STACK);
- /*
- * Events in data file are not collect in groups, but we still want
- * the group display. Set the artificial group and set the leader's
- * forced_leader flag to notify the display code.
- */
- if (group_set && !session->evlist->nr_groups) {
- struct perf_evsel *leader = perf_evlist__first(session->evlist);
-
- perf_evlist__set_leader(session->evlist);
- leader->forced_leader = true;
- }
+ setup_forced_leader(&report, session->evlist);
if (itrace_synth_opts.last_branch)
has_br_stack = true;
diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
index e14b3f7c7212..121df1683c36 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -3415,8 +3415,17 @@ int perf_event__synthesize_features(struct perf_tool *tool,
return ret;
}
}
+
+ /* Send HEADER_LAST_FEATURE mark. */
+ fe = ff.buf;
+ fe->feat_id = HEADER_LAST_FEATURE;
+ fe->header.type = PERF_RECORD_HEADER_FEATURE;
+ fe->header.size = sizeof(*fe);
+
+ ret = process(tool, ff.buf, NULL, NULL);
+
free(ff.buf);
- return 0;
+ return ret;
}
int perf_event__process_feature(struct perf_tool *tool,
--
2.13.6
On Wed, Mar 14, 2018 at 2:22 AM, Jiri Olsa <[email protected]> wrote:
> We need to synthesize events first, because some
> features works on top of them (on report side).
>
> Link: http://lkml.kernel.org/n/[email protected]
> Signed-off-by: Jiri Olsa <[email protected]>
Works for me.
Tested-by: Stephane Eranian <[email protected]>
> ---
> tools/perf/builtin-record.c | 18 +++++++++++-------
> 1 file changed, 11 insertions(+), 7 deletions(-)
>
> diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
> index d33103291b02..22ebeb92ac51 100644
> --- a/tools/perf/builtin-record.c
> +++ b/tools/perf/builtin-record.c
> @@ -754,13 +754,10 @@ static int record__synthesize(struct record *rec, bool tail)
> return 0;
>
> if (data->is_pipe) {
> - err = perf_event__synthesize_features(
> - tool, session, rec->evlist, process_synthesized_event);
> - if (err < 0) {
> - pr_err("Couldn't synthesize features.\n");
> - return err;
> - }
> -
> + /*
> + * We need to synthesize events first, because some
> + * features works on top of them (on report side).
> + */
> err = perf_event__synthesize_attrs(tool, session,
> process_synthesized_event);
> if (err < 0) {
> @@ -768,6 +765,13 @@ static int record__synthesize(struct record *rec, bool tail)
> goto out;
> }
>
> + err = perf_event__synthesize_features(tool, session, rec->evlist,
> + process_synthesized_event);
> + if (err < 0) {
> + pr_err("Couldn't synthesize features.\n");
> + return err;
> + }
> +
> if (have_tracepoints(&rec->evlist->entries)) {
> /*
> * FIXME err <= 0 here actually means that
> --
> 2.13.6
>
On Wed, Mar 14, 2018 at 2:22 AM, Jiri Olsa <[email protected]> wrote:
> Stephan reported a problem with forced leader in pipe mode,
> where report does not force the group output. The reason is
> that we don't force the leader in pipe mode.
>
> This patch adds HEADER_LAST_FEATURE mark to have a point
> where we have all events and features received, and
> force the group if requested.
>
> $ perf record --group -e '{cycles, instructions}' -o - kill | perf report -i - --group
>
> SNIP
>
> # Overhead Command Shared Object Symbol
> # ................ ....... ................ .......................
> #
> 28.36% 0.00% kill libc-2.25.so [.] __unregister_atfork
> 26.32% 0.00% kill libc-2.25.so [.] _dl_addr
> 26.10% 0.00% kill ld-2.25.so [.] _dl_relocate_object
> 17.32% 0.00% kill ld-2.25.so [.] __tunables_init
> 1.70% 0.01% kill [unknown] [k] 0xffffffffafa01a40
> 0.20% 0.00% kill ld-2.25.so [.] _start
> 0.00% 48.77% kill ld-2.25.so [.] do_lookup_x
> 0.00% 42.97% kill libc-2.25.so [.] _IO_getline
> 0.00% 6.35% kill ld-2.25.so [.] strcmp
> 0.00% 1.71% kill ld-2.25.so [.] _dl_sysdep_start
> 0.00% 0.19% kill ld-2.25.so [.] _dl_start
>
> Link: http://lkml.kernel.org/n/[email protected]
> Signed-off-by: Jiri Olsa <[email protected]>
Works for me.
Thanks.
Tested-by: Stephane Eranian <[email protected]>
> ---
> tools/perf/builtin-report.c | 57 ++++++++++++++++++++++++++++++++++-----------
> tools/perf/util/header.c | 11 ++++++++-
> 2 files changed, 53 insertions(+), 15 deletions(-)
>
> diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
> index 971ccba85464..91da12975642 100644
> --- a/tools/perf/builtin-report.c
> +++ b/tools/perf/builtin-report.c
> @@ -68,6 +68,7 @@ struct report {
> bool header;
> bool header_only;
> bool nonany_branch_mode;
> + bool group_set;
> int max_stack;
> struct perf_read_values show_threads_values;
> const char *pretty_printing_style;
> @@ -193,6 +194,45 @@ static int hist_iter__branch_callback(struct hist_entry_iter *iter,
> return err;
> }
>
> +/*
> + * Events in data file are not collect in groups, but we still want
> + * the group display. Set the artificial group and set the leader's
> + * forced_leader flag to notify the display code.
> + */
> +static void setup_forced_leader(struct report *report,
> + struct perf_evlist *evlist)
> +{
> + if (report->group_set && !evlist->nr_groups) {
> + struct perf_evsel *leader = perf_evlist__first(evlist);
> +
> + perf_evlist__set_leader(evlist);
> + leader->forced_leader = true;
> + }
> +}
> +
> +static int process_feature_event(struct perf_tool *tool,
> + union perf_event *event,
> + struct perf_session *session __maybe_unused)
> +{
> + struct report *rep = container_of(tool, struct report, tool);
> +
> + if (event->feat.feat_id < HEADER_LAST_FEATURE)
> + return perf_event__process_feature(tool, event, session);
> +
> + if (event->feat.feat_id != HEADER_LAST_FEATURE) {
> + pr_err("failed: wrong feature ID: %" PRIu64 "\n",
> + event->feat.feat_id);
> + return -1;
> + }
> +
> + /*
> + * All features are received, we can force the
> + * group if needed.
> + */
> + setup_forced_leader(rep, session->evlist);
> + return 0;
> +}
> +
> static int process_sample_event(struct perf_tool *tool,
> union perf_event *event,
> struct perf_sample *sample,
> @@ -940,7 +980,6 @@ int cmd_report(int argc, const char **argv)
> "perf report [<options>]",
> NULL
> };
> - bool group_set = false;
> struct report report = {
> .tool = {
> .sample = process_sample_event,
> @@ -958,7 +997,7 @@ int cmd_report(int argc, const char **argv)
> .id_index = perf_event__process_id_index,
> .auxtrace_info = perf_event__process_auxtrace_info,
> .auxtrace = perf_event__process_auxtrace,
> - .feature = perf_event__process_feature,
> + .feature = process_feature_event,
> .ordered_events = true,
> .ordering_requires_timestamps = true,
> },
> @@ -1060,7 +1099,7 @@ int cmd_report(int argc, const char **argv)
> "Specify disassembler style (e.g. -M intel for intel syntax)"),
> OPT_BOOLEAN(0, "show-total-period", &symbol_conf.show_total_period,
> "Show a column with the sum of periods"),
> - OPT_BOOLEAN_SET(0, "group", &symbol_conf.event_group, &group_set,
> + OPT_BOOLEAN_SET(0, "group", &symbol_conf.event_group, &report.group_set,
> "Show event group information together"),
> OPT_CALLBACK_NOOPT('b', "branch-stack", &branch_mode, "",
> "use branch records for per branch histogram filling",
> @@ -1177,17 +1216,7 @@ int cmd_report(int argc, const char **argv)
> has_br_stack = perf_header__has_feat(&session->header,
> HEADER_BRANCH_STACK);
>
> - /*
> - * Events in data file are not collect in groups, but we still want
> - * the group display. Set the artificial group and set the leader's
> - * forced_leader flag to notify the display code.
> - */
> - if (group_set && !session->evlist->nr_groups) {
> - struct perf_evsel *leader = perf_evlist__first(session->evlist);
> -
> - perf_evlist__set_leader(session->evlist);
> - leader->forced_leader = true;
> - }
> + setup_forced_leader(&report, session->evlist);
>
> if (itrace_synth_opts.last_branch)
> has_br_stack = true;
> diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
> index e14b3f7c7212..121df1683c36 100644
> --- a/tools/perf/util/header.c
> +++ b/tools/perf/util/header.c
> @@ -3415,8 +3415,17 @@ int perf_event__synthesize_features(struct perf_tool *tool,
> return ret;
> }
> }
> +
> + /* Send HEADER_LAST_FEATURE mark. */
> + fe = ff.buf;
> + fe->feat_id = HEADER_LAST_FEATURE;
> + fe->header.type = PERF_RECORD_HEADER_FEATURE;
> + fe->header.size = sizeof(*fe);
> +
> + ret = process(tool, ff.buf, NULL, NULL);
> +
> free(ff.buf);
> - return 0;
> + return ret;
> }
>
> int perf_event__process_feature(struct perf_tool *tool,
> --
> 2.13.6
>
Em Wed, Mar 14, 2018 at 11:45:14AM -0700, Stephane Eranian escreveu:
> On Wed, Mar 14, 2018 at 2:22 AM, Jiri Olsa <[email protected]> wrote:
> > We need to synthesize events first, because some
> > features works on top of them (on report side).
> >
> > Link: http://lkml.kernel.org/n/[email protected]
> > Signed-off-by: Jiri Olsa <[email protected]>
>
> Works for me.
> Tested-by: Stephane Eranian <[email protected]>
Thanks for testing, will apply.
- Arnaldo
Commit-ID: 57b5de463925b9fbd1eff56a38a510495ac9c2c0
Gitweb: https://git.kernel.org/tip/57b5de463925b9fbd1eff56a38a510495ac9c2c0
Author: Jiri Olsa <[email protected]>
AuthorDate: Wed, 14 Mar 2018 10:22:05 +0100
Committer: Arnaldo Carvalho de Melo <[email protected]>
CommitDate: Fri, 16 Mar 2018 13:56:59 -0300
perf report: Support forced leader feature in pipe mode
Stephane reported a problem with forced leader in pipe mode, where
report does not force the group output. The reason is that we don't
force the leader in pipe mode.
This patch adds HEADER_LAST_FEATURE mark to have a point where we have
all events and features received, and force the group if requested.
$ perf record --group -e '{cycles, instructions}' -o - kill | perf report -i - --group
SNIP
# Overhead Command Shared Object Symbol
# ................ ....... ................ .......................
#
28.36% 0.00% kill libc-2.25.so [.] __unregister_atfork
26.32% 0.00% kill libc-2.25.so [.] _dl_addr
26.10% 0.00% kill ld-2.25.so [.] _dl_relocate_object
17.32% 0.00% kill ld-2.25.so [.] __tunables_init
1.70% 0.01% kill [unknown] [k] 0xffffffffafa01a40
0.20% 0.00% kill ld-2.25.so [.] _start
0.00% 48.77% kill ld-2.25.so [.] do_lookup_x
0.00% 42.97% kill libc-2.25.so [.] _IO_getline
0.00% 6.35% kill ld-2.25.so [.] strcmp
0.00% 1.71% kill ld-2.25.so [.] _dl_sysdep_start
0.00% 0.19% kill ld-2.25.so [.] _dl_start
Signed-off-by: Jiri Olsa <[email protected]>
Tested-by: Arnaldo Carvalho de Melo <[email protected]>
Tested-by: Stephane Eranian <[email protected]>
Cc: Alexander Shishkin <[email protected]>
Cc: David Ahern <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
---
tools/perf/builtin-report.c | 57 ++++++++++++++++++++++++++++++++++-----------
tools/perf/util/header.c | 11 ++++++++-
2 files changed, 53 insertions(+), 15 deletions(-)
diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index 971ccba85464..91da12975642 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -68,6 +68,7 @@ struct report {
bool header;
bool header_only;
bool nonany_branch_mode;
+ bool group_set;
int max_stack;
struct perf_read_values show_threads_values;
const char *pretty_printing_style;
@@ -193,6 +194,45 @@ out:
return err;
}
+/*
+ * Events in data file are not collect in groups, but we still want
+ * the group display. Set the artificial group and set the leader's
+ * forced_leader flag to notify the display code.
+ */
+static void setup_forced_leader(struct report *report,
+ struct perf_evlist *evlist)
+{
+ if (report->group_set && !evlist->nr_groups) {
+ struct perf_evsel *leader = perf_evlist__first(evlist);
+
+ perf_evlist__set_leader(evlist);
+ leader->forced_leader = true;
+ }
+}
+
+static int process_feature_event(struct perf_tool *tool,
+ union perf_event *event,
+ struct perf_session *session __maybe_unused)
+{
+ struct report *rep = container_of(tool, struct report, tool);
+
+ if (event->feat.feat_id < HEADER_LAST_FEATURE)
+ return perf_event__process_feature(tool, event, session);
+
+ if (event->feat.feat_id != HEADER_LAST_FEATURE) {
+ pr_err("failed: wrong feature ID: %" PRIu64 "\n",
+ event->feat.feat_id);
+ return -1;
+ }
+
+ /*
+ * All features are received, we can force the
+ * group if needed.
+ */
+ setup_forced_leader(rep, session->evlist);
+ return 0;
+}
+
static int process_sample_event(struct perf_tool *tool,
union perf_event *event,
struct perf_sample *sample,
@@ -940,7 +980,6 @@ int cmd_report(int argc, const char **argv)
"perf report [<options>]",
NULL
};
- bool group_set = false;
struct report report = {
.tool = {
.sample = process_sample_event,
@@ -958,7 +997,7 @@ int cmd_report(int argc, const char **argv)
.id_index = perf_event__process_id_index,
.auxtrace_info = perf_event__process_auxtrace_info,
.auxtrace = perf_event__process_auxtrace,
- .feature = perf_event__process_feature,
+ .feature = process_feature_event,
.ordered_events = true,
.ordering_requires_timestamps = true,
},
@@ -1060,7 +1099,7 @@ int cmd_report(int argc, const char **argv)
"Specify disassembler style (e.g. -M intel for intel syntax)"),
OPT_BOOLEAN(0, "show-total-period", &symbol_conf.show_total_period,
"Show a column with the sum of periods"),
- OPT_BOOLEAN_SET(0, "group", &symbol_conf.event_group, &group_set,
+ OPT_BOOLEAN_SET(0, "group", &symbol_conf.event_group, &report.group_set,
"Show event group information together"),
OPT_CALLBACK_NOOPT('b', "branch-stack", &branch_mode, "",
"use branch records for per branch histogram filling",
@@ -1177,17 +1216,7 @@ repeat:
has_br_stack = perf_header__has_feat(&session->header,
HEADER_BRANCH_STACK);
- /*
- * Events in data file are not collect in groups, but we still want
- * the group display. Set the artificial group and set the leader's
- * forced_leader flag to notify the display code.
- */
- if (group_set && !session->evlist->nr_groups) {
- struct perf_evsel *leader = perf_evlist__first(session->evlist);
-
- perf_evlist__set_leader(session->evlist);
- leader->forced_leader = true;
- }
+ setup_forced_leader(&report, session->evlist);
if (itrace_synth_opts.last_branch)
has_br_stack = true;
diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
index e14b3f7c7212..121df1683c36 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -3415,8 +3415,17 @@ int perf_event__synthesize_features(struct perf_tool *tool,
return ret;
}
}
+
+ /* Send HEADER_LAST_FEATURE mark. */
+ fe = ff.buf;
+ fe->feat_id = HEADER_LAST_FEATURE;
+ fe->header.type = PERF_RECORD_HEADER_FEATURE;
+ fe->header.size = sizeof(*fe);
+
+ ret = process(tool, ff.buf, NULL, NULL);
+
free(ff.buf);
- return 0;
+ return ret;
}
int perf_event__process_feature(struct perf_tool *tool,
Commit-ID: a2015516c5c0be932a69e1d3405c2fb03b4eacf1
Gitweb: https://git.kernel.org/tip/a2015516c5c0be932a69e1d3405c2fb03b4eacf1
Author: Jiri Olsa <[email protected]>
AuthorDate: Wed, 14 Mar 2018 10:22:04 +0100
Committer: Arnaldo Carvalho de Melo <[email protected]>
CommitDate: Fri, 16 Mar 2018 13:56:50 -0300
perf record: Synthesize features before events in pipe mode
We need to synthesize events first, because some features works on top
of them (on report side).
Signed-off-by: Jiri Olsa <[email protected]>
Tested-by: Stephane Eranian <[email protected]>
Cc: Alexander Shishkin <[email protected]>
Cc: David Ahern <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
---
tools/perf/builtin-record.c | 18 +++++++++++-------
1 file changed, 11 insertions(+), 7 deletions(-)
diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index d33103291b02..22ebeb92ac51 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -754,13 +754,10 @@ static int record__synthesize(struct record *rec, bool tail)
return 0;
if (data->is_pipe) {
- err = perf_event__synthesize_features(
- tool, session, rec->evlist, process_synthesized_event);
- if (err < 0) {
- pr_err("Couldn't synthesize features.\n");
- return err;
- }
-
+ /*
+ * We need to synthesize events first, because some
+ * features works on top of them (on report side).
+ */
err = perf_event__synthesize_attrs(tool, session,
process_synthesized_event);
if (err < 0) {
@@ -768,6 +765,13 @@ static int record__synthesize(struct record *rec, bool tail)
goto out;
}
+ err = perf_event__synthesize_features(tool, session, rec->evlist,
+ process_synthesized_event);
+ if (err < 0) {
+ pr_err("Couldn't synthesize features.\n");
+ return err;
+ }
+
if (have_tracepoints(&rec->evlist->entries)) {
/*
* FIXME err <= 0 here actually means that