linux-kernel - [PATCH v2] selftests/seccomp: Flush benchmark output

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Message-Id: <20210527222349.160313-1-keescook@chromium.org>
Date:   Thu, 27 May 2021 15:23:49 -0700
From:   Kees Cook <keescook@...omium.org>
To:     linux-kernel@...r.kernel.org
Cc:     Kees Cook <keescook@...omium.org>, Will Drewry <wad@...omium.org>,
        Andy Lutomirski <luto@...capital.net>
Subject: [PATCH v2] selftests/seccomp: Flush benchmark output

When running the seccomp benchmark under a test runner, it wouldn't
provide any feedback on progress. Set stdout unbuffered.

Suggested-by: Will Drewry <wad@...omium.org>
Signed-off-by: Kees Cook <keescook@...omium.org>
---
 tools/testing/selftests/seccomp/seccomp_benchmark.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tools/testing/selftests/seccomp/seccomp_benchmark.c b/tools/testing/selftests/seccomp/seccomp_benchmark.c
index fcc806585266..363cad755042 100644
--- a/tools/testing/selftests/seccomp/seccomp_benchmark.c
+++ b/tools/testing/selftests/seccomp/seccomp_benchmark.c
@@ -143,6 +143,8 @@ int main(int argc, char *argv[])
 	unsigned long long native, filter1, filter2, bitmap1, bitmap2;
 	unsigned long long entry, per_filter1, per_filter2;
 
+	setbuf(stdout, NULL);
+
 	printf("Current BPF sysctl settings:\n");
 	system("sysctl net.core.bpf_jit_enable");
 	system("sysctl net.core.bpf_jit_harden");
-- 
2.25.1