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authorWang Nan <wangnan0@huawei.com>2016-04-08 18:07:24 +0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2016-04-12 04:17:45 +0300
commitd78885739a7df111dc7b081f8a09e08a5fcfecc2 (patch)
treeb1bf3df9c925992b7e2192835d62c3dedfaa7e9d /tools/perf/builtin-record.c
parentf9383452a26fc47f62c4ddcfa20ccebb7a09c2d8 (diff)
downloadlinux-d78885739a7df111dc7b081f8a09e08a5fcfecc2.tar.xz
perf bpf: Clone bpf stdout events in multiple bpf scripts
This patch allows cloning bpf-output event configuration among multiple bpf scripts. If there exist a map named '__bpf_output__' and not configured using 'map:__bpf_output__.event=', this patch clones the configuration of another '__bpf_stdout__' map. For example, following command: # perf trace --ev bpf-output/no-inherit,name=evt/ \ --ev ./test_bpf_trace.c/map:__bpf_stdout__.event=evt/ \ --ev ./test_bpf_trace2.c usleep 100000 equals to: # perf trace --ev bpf-output/no-inherit,name=evt/ \ --ev ./test_bpf_trace.c/map:__bpf_stdout__.event=evt/ \ --ev ./test_bpf_trace2.c/map:__bpf_stdout__.event=evt/ \ usleep 100000 Signed-off-by: Wang Nan <wangnan0@huawei.com> Suggested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Zefan Li <lizefan@huawei.com> Cc: pi3orama@163.com Link: http://lkml.kernel.org/r/1460128045-97310-4-git-send-email-wangnan0@huawei.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/builtin-record.c')
-rw-r--r--tools/perf/builtin-record.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index 410035c6e300..e64bd1ee5acb 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -1276,6 +1276,14 @@ int cmd_record(int argc, const char **argv, const char *prefix __maybe_unused)
if (err)
return err;
+ err = bpf__setup_stdout(rec->evlist);
+ if (err) {
+ bpf__strerror_setup_stdout(rec->evlist, err, errbuf, sizeof(errbuf));
+ pr_err("ERROR: Setup BPF stdout failed: %s\n",
+ errbuf);
+ return err;
+ }
+
err = -ENOMEM;
symbol__init(NULL);