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perf callchain: Make callchain cursors TLS

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perf top -G has a race on callchain cursor between main thread and
display thread. Since the callchain cursors are used locally make them
thread-local data would solve the problem.

Signed-off-by: Namhyung Kim <namhyung.kim@lge.com>
Reported-by: Sunjin Yang <fan4326@gmail.com>
Suggested-by: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Sunjin Yang <fan4326@gmail.com>
Link: http://lkml.kernel.org/r/1338443007-24857-1-git-send-email-namhyung.kim@lge.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Namhyung Kim
2012-05-31 14:43:26 +09:00
committed by Arnaldo Carvalho de Melo
parent ea1b3ebac9
commit 472606458f
7 changed files with 17 additions and 14 deletions
Download Patch File Download Diff File Expand all files Collapse all files
tools/perf/util/session.c
+7 -7
View File
@@ -288,7 +288,8 @@ struct branch_info *machine__resolve_bstack(struct machine *self,
return bi;
}
int machine__resolve_callchain(struct machine *self, struct perf_evsel *evsel,
int machine__resolve_callchain(struct machine *self,
struct perf_evsel *evsel __used,
struct thread *thread,
struct ip_callchain *chain,
struct symbol **parent)
@@ -297,7 +298,7 @@ int machine__resolve_callchain(struct machine *self, struct perf_evsel *evsel,
unsigned int i;
int err;
callchain_cursor_reset(&evsel->hists.callchain_cursor);
callchain_cursor_reset(&callchain_cursor);
for (i = 0; i < chain->nr; i++) {
u64 ip;
@@ -333,7 +334,7 @@ int machine__resolve_callchain(struct machine *self, struct perf_evsel *evsel,
break;
}
err = callchain_cursor_append(&evsel->hists.callchain_cursor,
err = callchain_cursor_append(&callchain_cursor,
ip, al.map, al.sym);
if (err)
return err;
@@ -1428,7 +1429,6 @@ void perf_event__print_ip(union perf_event *event, struct perf_sample *sample,
int print_sym, int print_dso, int print_symoffset)
{
struct addr_location al;
struct callchain_cursor *cursor = &evsel->hists.callchain_cursor;
struct callchain_cursor_node *node;
if (perf_event__preprocess_sample(event, machine, &al, sample,
@@ -1446,10 +1446,10 @@ void perf_event__print_ip(union perf_event *event, struct perf_sample *sample,
error("Failed to resolve callchain. Skipping\n");
return;
}
callchain_cursor_commit(cursor);
callchain_cursor_commit(&callchain_cursor);
while (1) {
node = callchain_cursor_current(cursor);
node = callchain_cursor_current(&callchain_cursor);
if (!node)
break;
@@ -1465,7 +1465,7 @@ void perf_event__print_ip(union perf_event *event, struct perf_sample *sample,
}
printf("\n");
callchain_cursor_advance(cursor);
callchain_cursor_advance(&callchain_cursor);
}
} else {