[PATCH RFC V2 09/10] perf top: add option to set the number of thread for event synthesize

[kan . liang]

From: Kan Liang 

Using UINT_MAX to indicate the default thread#, which is the max number
of online CPU.

Signed-off-by: Kan Liang 
---
 tools/perf/builtin-top.c | 5 -
 tools/perf/util/event.c  | 5 -
 tools/perf/util/top.h| 1 +
 3 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index 4b8fdc1..5f59aa7 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -961,7 +961,7 @@ static int __cmd_top(struct perf_top *top)
machine__synthesize_threads(>session->machines.host, >target,
top->evlist->threads, false,
opts->proc_map_timeout,
-   (unsigned 
int)sysconf(_SC_NPROCESSORS_ONLN));
+   top->nr_threads_synthesize);
 
if (perf_hpp_list.socket) {
ret = perf_env__read_cpu_topology_map(_env);
@@ -1114,6 +1114,7 @@ int cmd_top(int argc, const char **argv)
},
.max_stack   = sysctl_perf_event_max_stack,
.sym_pcnt_filter = 5,
+   .nr_threads_synthesize = UINT_MAX,
};
struct record_opts *opts = _opts;
struct target *target = >target;
@@ -1223,6 +1224,8 @@ int cmd_top(int argc, const char **argv)
OPT_BOOLEAN(0, "hierarchy", _conf.report_hierarchy,
"Show entries in a hierarchy"),
OPT_BOOLEAN(0, "force", _conf.force, "don't complain, do it"),
+   OPT_UINTEGER(0, "num-thread-synthesize", _threads_synthesize,
+   "number of thread to run event synthesize"),
OPT_END()
};
const char * const top_usage[] = {
diff --git a/tools/perf/util/event.c b/tools/perf/util/event.c
index 8c4e072..ecef279 100644
--- a/tools/perf/util/event.c
+++ b/tools/perf/util/event.c
@@ -778,7 +778,10 @@ int perf_event__synthesize_threads(struct perf_tool *tool,
if (n < 0)
return err;
 
-   thread_nr = nr_threads_synthesize;
+   if (nr_threads_synthesize == UINT_MAX)
+   thread_nr = sysconf(_SC_NPROCESSORS_ONLN);
+   else
+   thread_nr = nr_threads_synthesize;
if (thread_nr <= 0)
thread_nr = 1;
if (thread_nr > n)
diff --git a/tools/perf/util/top.h b/tools/perf/util/top.h
index 9bdfb78..f4296e1 100644
--- a/tools/perf/util/top.h
+++ b/tools/perf/util/top.h
@@ -37,6 +37,7 @@ struct perf_top {
intsym_pcnt_filter;
const char *sym_filter;
float  min_percent;
+   unsigned int   nr_threads_synthesize;
 };
 
 #define CONSOLE_CLEAR ""
-- 
2.5.5

[PATCH RFC V2 09/10] perf top: add option to set the number of thread for event synthesize

[kan . liang]

From: Kan Liang 

Using UINT_MAX to indicate the default thread#, which is the max number
of online CPU.

Signed-off-by: Kan Liang 
---
 tools/perf/builtin-top.c | 5 -
 tools/perf/util/event.c  | 5 -
 tools/perf/util/top.h| 1 +
 3 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index 4b8fdc1..5f59aa7 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -961,7 +961,7 @@ static int __cmd_top(struct perf_top *top)
machine__synthesize_threads(>session->machines.host, >target,
top->evlist->threads, false,
opts->proc_map_timeout,
-   (unsigned 
int)sysconf(_SC_NPROCESSORS_ONLN));
+   top->nr_threads_synthesize);
 
if (perf_hpp_list.socket) {
ret = perf_env__read_cpu_topology_map(_env);
@@ -1114,6 +1114,7 @@ int cmd_top(int argc, const char **argv)
},
.max_stack   = sysctl_perf_event_max_stack,
.sym_pcnt_filter = 5,
+   .nr_threads_synthesize = UINT_MAX,
};
struct record_opts *opts = _opts;
struct target *target = >target;
@@ -1223,6 +1224,8 @@ int cmd_top(int argc, const char **argv)
OPT_BOOLEAN(0, "hierarchy", _conf.report_hierarchy,
"Show entries in a hierarchy"),
OPT_BOOLEAN(0, "force", _conf.force, "don't complain, do it"),
+   OPT_UINTEGER(0, "num-thread-synthesize", _threads_synthesize,
+   "number of thread to run event synthesize"),
OPT_END()
};
const char * const top_usage[] = {
diff --git a/tools/perf/util/event.c b/tools/perf/util/event.c
index 8c4e072..ecef279 100644
--- a/tools/perf/util/event.c
+++ b/tools/perf/util/event.c
@@ -778,7 +778,10 @@ int perf_event__synthesize_threads(struct perf_tool *tool,
if (n < 0)
return err;
 
-   thread_nr = nr_threads_synthesize;
+   if (nr_threads_synthesize == UINT_MAX)
+   thread_nr = sysconf(_SC_NPROCESSORS_ONLN);
+   else
+   thread_nr = nr_threads_synthesize;
if (thread_nr <= 0)
thread_nr = 1;
if (thread_nr > n)
diff --git a/tools/perf/util/top.h b/tools/perf/util/top.h
index 9bdfb78..f4296e1 100644
--- a/tools/perf/util/top.h
+++ b/tools/perf/util/top.h
@@ -37,6 +37,7 @@ struct perf_top {
intsym_pcnt_filter;
const char *sym_filter;
float  min_percent;
+   unsigned int   nr_threads_synthesize;
 };
 
 #define CONSOLE_CLEAR ""
-- 
2.5.5