Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751920AbdITQMO (ORCPT ); Wed, 20 Sep 2017 12:12:14 -0400 Received: from mail-pg0-f48.google.com ([74.125.83.48]:53365 "EHLO mail-pg0-f48.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751859AbdITQMM (ORCPT ); Wed, 20 Sep 2017 12:12:12 -0400 X-Google-Smtp-Source: AOwi7QCzDoMYVGOFk/tLoQUFucudYLe29jFRPWEtqCbXp7DArKndxy5uiEoOVcAKjfDv2XA1AZxXgw== From: Joel Fernandes To: linux-kernel@vger.kernel.org Cc: netdev@vger.kernel.org, alison@she-devel.com, juri.lelli@arm.com, fengc@google.com, daniel@iogearbox.net, davem@davemloft.net, ast@kernel.org, kernel-team@android.com, Joel Fernandes Subject: [PATCH v4 1/4] samples/bpf: Use getppid instead of getpgrp for array map stress Date: Wed, 20 Sep 2017 09:11:56 -0700 Message-Id: <20170920161159.25747-1-joelaf@google.com> X-Mailer: git-send-email 2.14.1.821.g8fa685d3b7-goog Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1495 Lines: 40 When cross-compiling the bpf sample map_perf_test for aarch64, I find that __NR_getpgrp is undefined. This causes build errors. This syscall is deprecated and requires defining __ARCH_WANT_SYSCALL_DEPRECATED. To avoid having to define that, just use a different syscall (getppid) for the array map stress test. Acked-by: Alexei Starovoitov Signed-off-by: Joel Fernandes --- samples/bpf/map_perf_test_kern.c | 2 +- samples/bpf/map_perf_test_user.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/samples/bpf/map_perf_test_kern.c b/samples/bpf/map_perf_test_kern.c index 098c857f1eda..2b2ffb97018b 100644 --- a/samples/bpf/map_perf_test_kern.c +++ b/samples/bpf/map_perf_test_kern.c @@ -266,7 +266,7 @@ int stress_hash_map_lookup(struct pt_regs *ctx) return 0; } -SEC("kprobe/sys_getpgrp") +SEC("kprobe/sys_getppid") int stress_array_map_lookup(struct pt_regs *ctx) { u32 key = 1, i; diff --git a/samples/bpf/map_perf_test_user.c b/samples/bpf/map_perf_test_user.c index f388254896f6..a0310fc70057 100644 --- a/samples/bpf/map_perf_test_user.c +++ b/samples/bpf/map_perf_test_user.c @@ -282,7 +282,7 @@ static void test_array_lookup(int cpu) start_time = time_get_ns(); for (i = 0; i < max_cnt; i++) - syscall(__NR_getpgrp, 0); + syscall(__NR_getppid, 0); printf("%d:array_lookup %lld lookups per sec\n", cpu, max_cnt * 1000000000ll * 64 / (time_get_ns() - start_time)); } -- 2.14.1.821.g8fa685d3b7-goog