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Groups > linux.kernel > #1730132
| From | kan.liang@intel.com |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH RFC V2 09/10] perf top: add option to set the number of thread for event synthesize |
| Date | 2017-09-11 04:30 +0200 |
| Message-ID | <uomE2-4Gu-33@gated-at.bofh.it> (permalink) |
| References | <uomE1-4Gu-1@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
From: Kan Liang <kan.liang@intel.com>
Using UINT_MAX to indicate the default thread#, which is the max number
of online CPU.
Signed-off-by: Kan Liang <kan.liang@intel.com>
---
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(&top->session->machines.host, &opts->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(&perf_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 = &top.record_opts;
struct target *target = &opts->target;
@@ -1223,6 +1224,8 @@ int cmd_top(int argc, const char **argv)
OPT_BOOLEAN(0, "hierarchy", &symbol_conf.report_hierarchy,
"Show entries in a hierarchy"),
OPT_BOOLEAN(0, "force", &symbol_conf.force, "don't complain, do it"),
+ OPT_UINTEGER(0, "num-thread-synthesize", &top.nr_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 {
int sym_pcnt_filter;
const char *sym_filter;
float min_percent;
+ unsigned int nr_threads_synthesize;
};
#define CONSOLE_CLEAR "[H[2J"
--
2.5.5
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[PATCH RFC V2 00/10] perf top optimization kan.liang@intel.com - 2017-09-11 04:30 +0200
[PATCH RFC V2 10/10] perf top: switch back to overwrite mode kan.liang@intel.com - 2017-09-11 04:30 +0200
[PATCH RFC V2 04/10] petf tools: introduce a new function to set namespaces id kan.liang@intel.com - 2017-09-11 04:30 +0200
[PATCH RFC V2 06/10] perf tools: lock to protect comm_str rb tree kan.liang@intel.com - 2017-09-11 04:30 +0200
[PATCH RFC V2 02/10] perf tools: using scandir to replace readdir kan.liang@intel.com - 2017-09-11 04:30 +0200
Re: [PATCH RFC V2 02/10] perf tools: using scandir to replace readdir Arnaldo Carvalho de Melo <acme@kernel.org> - 2017-09-13 17:30 +0200
[PATCH RFC V2 03/10] petf tools: using comm_str to replace comm in hist_entry kan.liang@intel.com - 2017-09-11 04:30 +0200
Re: [PATCH RFC V2 03/10] petf tools: using comm_str to replace comm in hist_entry Arnaldo Carvalho de Melo <acme@kernel.org> - 2017-09-13 17:30 +0200
Re: [PATCH RFC V2 03/10] petf tools: using comm_str to replace comm in hist_entry Jiri Olsa <jolsa@redhat.com> - 2017-09-18 10:40 +0200
[PATCH RFC V2 01/10] perf tools: hashtable for machine threads kan.liang@intel.com - 2017-09-11 04:30 +0200
Re: [PATCH RFC V2 01/10] perf tools: hashtable for machine threads Arnaldo Carvalho de Melo <acme@kernel.org> - 2017-09-13 15:30 +0200
[tip:perf/core] perf machine: Use hashtable for machine threads tip-bot for Kan Liang <tipbot@zytor.com> - 2017-09-22 18:50 +0200
[PATCH RFC V2 08/10] perf top: implement multithreading for perf_event__synthesize_threads kan.liang@intel.com - 2017-09-11 04:30 +0200
Re: [PATCH RFC V2 08/10] perf top: implement multithreading for perf_event__synthesize_threads Jiri Olsa <jolsa@redhat.com> - 2017-09-18 13:30 +0200
[PATCH RFC V2 07/10] perf tools: change machine comm_exec type to atomic kan.liang@intel.com - 2017-09-11 04:30 +0200
Re: [PATCH RFC V2 07/10] perf tools: change machine comm_exec type to atomic Arnaldo Carvalho de Melo <acme@kernel.org> - 2017-09-13 17:30 +0200
RE: [PATCH RFC V2 07/10] perf tools: change machine comm_exec type to atomic "Liang, Kan" <kan.liang@intel.com> - 2017-09-15 22:10 +0200
Re: [PATCH RFC V2 07/10] perf tools: change machine comm_exec type to atomic Jiri Olsa <jolsa@redhat.com> - 2017-09-18 13:40 +0200
[PATCH RFC V2 05/10] perf tools: lock to protect thread list kan.liang@intel.com - 2017-09-11 04:30 +0200
Re: [PATCH RFC V2 05/10] perf tools: lock to protect thread list Jiri Olsa <jolsa@redhat.com> - 2017-09-18 11:00 +0200
RE: [PATCH RFC V2 05/10] perf tools: lock to protect thread list "Liang, Kan" <kan.liang@intel.com> - 2017-09-18 18:20 +0200
[PATCH RFC V2 09/10] perf top: add option to set the number of thread for event synthesize kan.liang@intel.com - 2017-09-11 04:30 +0200
RE: [PATCH RFC V2 00/10] perf top optimization "Liang, Kan" <kan.liang@intel.com> - 2017-09-13 17:30 +0200
Re: [PATCH RFC V2 00/10] perf top optimization Arnaldo Carvalho de Melo <acme@kernel.org> - 2017-09-13 17:40 +0200
Re: [PATCH RFC V2 00/10] perf top optimization Arnaldo Carvalho de Melo <acme@kernel.org> - 2017-09-14 23:20 +0200
RE: [PATCH RFC V2 00/10] perf top optimization "Liang, Kan" <kan.liang@intel.com> - 2017-09-15 17:20 +0200
Re: [PATCH RFC V2 00/10] perf top optimization Arnaldo Carvalho de Melo <acme@kernel.org> - 2017-09-15 19:30 +0200
RE: [PATCH RFC V2 00/10] perf top optimization "Liang, Kan" <kan.liang@intel.com> - 2017-09-15 19:30 +0200
Re: [PATCH RFC V2 00/10] perf top optimization Arnaldo Carvalho de Melo <acme@kernel.org> - 2017-09-15 20:30 +0200
RE: [PATCH RFC V2 00/10] perf top optimization "Liang, Kan" <kan.liang@intel.com> - 2017-09-15 20:30 +0200
Re: [PATCH RFC V2 00/10] perf top optimization Arnaldo Carvalho de Melo <acme@kernel.org> - 2017-09-13 17:30 +0200
Re: [PATCH RFC V2 00/10] perf top optimization Jiri Olsa <jolsa@redhat.com> - 2017-09-18 11:00 +0200
Re: [PATCH RFC V2 00/10] perf top optimization Arnaldo Carvalho de Melo <acme@kernel.org> - 2017-09-18 15:10 +0200
RE: [PATCH RFC V2 00/10] perf top optimization "Liang, Kan" <kan.liang@intel.com> - 2017-09-18 18:30 +0200
Re: [PATCH RFC V2 00/10] perf top optimization Jiri Olsa <jolsa@redhat.com> - 2017-09-19 10:20 +0200
RE: [PATCH RFC V2 00/10] perf top optimization "Liang, Kan" <kan.liang@intel.com> - 2017-09-19 14:50 +0200
Re: [PATCH RFC V2 00/10] perf top optimization Arnaldo Carvalho de Melo <acme@kernel.org> - 2017-09-19 16:30 +0200
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