From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752038AbdHGNI1 (ORCPT ); Mon, 7 Aug 2017 09:08:27 -0400 Received: from mail-pg0-f42.google.com ([74.125.83.42]:33053 "EHLO mail-pg0-f42.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751860AbdHGNGT (ORCPT ); Mon, 7 Aug 2017 09:06:19 -0400 From: Joel Fernandes To: linux-kernel@vger.kernel.org Cc: Chenbo Feng , Alison Chaiken , Juri.Lelli@arm.com, Joel Fernandes , Alexei Starovoitov , Daniel Borkmann , netdev@vger.kernel.org (open list:BPF (Safe dynamic programs and tools)) Subject: [PATCH RFC v2 1/5] samples/bpf: Use getppid instead of getpgrp for array map stress Date: Mon, 7 Aug 2017 06:05:58 -0700 Message-Id: <20170807130602.31785-2-joelaf@google.com> X-Mailer: git-send-email 2.14.0.rc1.383.gd1ce394fe2-goog In-Reply-To: <20170807130602.31785-1-joelaf@google.com> References: <20170807130602.31785-1-joelaf@google.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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. 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 245165817fbe..038ffec295cf 100644 --- a/samples/bpf/map_perf_test_kern.c +++ b/samples/bpf/map_perf_test_kern.c @@ -232,7 +232,7 @@ 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 1a8894b5ac51..1e9e68942197 100644 --- a/samples/bpf/map_perf_test_user.c +++ b/samples/bpf/map_perf_test_user.c @@ -232,7 +232,7 @@ 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)); } -- 2.14.0.rc1.383.gd1ce394fe2-goog