Commit 01128065 authored Aug 23, 2019 by Arnaldo Carvalho de Melo

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@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lkml.kernel.org/n/tip-o74yggieorucfg4j74tb6rta@git.kernel.org

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

parent 2ad926db

tools/perf/examples/bpf/augmented_raw_syscalls.c

+3 −3

Original line number	Diff line number	Diff line
		@@ -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);

		/*

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