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Groups > linux.kernel > #1730121
| From | kan.liang@intel.com |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH RFC V2 06/10] perf tools: lock to protect comm_str rb tree |
| Date | 2017-09-11 04:30 +0200 |
| Message-ID | <uomE1-4Gu-9@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>
Add comm_str_lock to protect comm_str rb tree.
Signed-off-by: Kan Liang <kan.liang@intel.com>
---
tools/perf/util/comm.c | 18 +++++++++++++++++-
1 file changed, 17 insertions(+), 1 deletion(-)
diff --git a/tools/perf/util/comm.c b/tools/perf/util/comm.c
index 7bc981b..cb7f98c 100644
--- a/tools/perf/util/comm.c
+++ b/tools/perf/util/comm.c
@@ -5,6 +5,7 @@
#include <stdio.h>
#include <string.h>
#include <linux/refcount.h>
+#include <pthread.h>
struct comm_str {
char *str;
@@ -14,6 +15,7 @@ struct comm_str {
/* Should perhaps be moved to struct machine */
static struct rb_root comm_str_root;
+static pthread_mutex_t comm_str_lock = PTHREAD_MUTEX_INITIALIZER;
static struct comm_str *comm_str__get(struct comm_str *cs)
{
@@ -25,7 +27,9 @@ static struct comm_str *comm_str__get(struct comm_str *cs)
static void comm_str__put(struct comm_str *cs)
{
if (cs && refcount_dec_and_test(&cs->refcnt)) {
+ pthread_mutex_lock(&comm_str_lock);
rb_erase(&cs->rb_node, &comm_str_root);
+ pthread_mutex_unlock(&comm_str_lock);
zfree(&cs->str);
free(cs);
}
@@ -50,7 +54,8 @@ static struct comm_str *comm_str__alloc(const char *str)
return cs;
}
-static struct comm_str *comm_str__findnew(const char *str, struct rb_root *root)
+static
+struct comm_str *__comm_str__findnew(const char *str, struct rb_root *root)
{
struct rb_node **p = &root->rb_node;
struct rb_node *parent = NULL;
@@ -81,6 +86,17 @@ static struct comm_str *comm_str__findnew(const char *str, struct rb_root *root)
return new;
}
+static struct comm_str *comm_str__findnew(const char *str, struct rb_root *root)
+{
+ struct comm_str *cs;
+
+ pthread_mutex_lock(&comm_str_lock);
+ cs = __comm_str__findnew(str, root);
+ pthread_mutex_unlock(&comm_str_lock);
+
+ return cs;
+}
+
struct comm *comm__new(const char *str, u64 timestamp, bool exec)
{
struct comm *comm = zalloc(sizeof(*comm));
--
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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