The following commit has been merged into the perf/core branch of tip:
Commit-ID: 01128065ca5112123e6992dc0522484349c6ced7
Gitweb: https://git.kernel.org/tip/01128065ca5112123e6992dc0522484349c6ced7
Author: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
AuthorDate: Fri, 23 Aug 2019 15:38:08 -03:00
Committer: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitterDate: Mon, 26 Aug 2019 11:58:29 -03:00
perf augmented_raw_syscalls: Postpone tmp map lookup to after pid_filter
No sense in doing that lookup before figuring out if it will be used,
i.e. if the pid is being filtered that tmp space lookup will be useless.
Cc: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Link: https://lkml.kernel.org/n/tip-o74yggieorucfg4j74tb6rta@xxxxxxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
tools/perf/examples/bpf/augmented_raw_syscalls.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/tools/perf/examples/bpf/augmented_raw_syscalls.c b/tools/perf/examples/bpf/augmented_raw_syscalls.c
index b85b177..0a8d217 100644
--- a/tools/perf/examples/bpf/augmented_raw_syscalls.c
+++ b/tools/perf/examples/bpf/augmented_raw_syscalls.c
@@ -250,13 +250,13 @@ int sys_enter(struct syscall_enter_args *args)
struct syscall *syscall;
int key = 0;
+ if (pid_filter__has(&pids_filtered, getpid()))
+ return 0;
+
augmented_args = bpf_map_lookup_elem(&augmented_args_tmp, &key);
if (augmented_args == NULL)
return 1;
- if (pid_filter__has(&pids_filtered, getpid()))
- return 0;
-
probe_read(&augmented_args->args, sizeof(augmented_args->args), args);
/*
|