{"id":816337,"url":"http://patchwork.ozlabs.org/api/patches/816337/?format=json","web_url":"http://patchwork.ozlabs.org/project/netdev/patch/20170920161159.25747-1-joelaf@google.com/","project":{"id":7,"url":"http://patchwork.ozlabs.org/api/projects/7/?format=json","name":"Linux network development","link_name":"netdev","list_id":"netdev.vger.kernel.org","list_email":"netdev@vger.kernel.org","web_url":null,"scm_url":null,"webscm_url":null,"list_archive_url":"","list_archive_url_format":"","commit_url_format":""},"msgid":"<20170920161159.25747-1-joelaf@google.com>","list_archive_url":null,"date":"2017-09-20T16:11:56","name":"[v4,1/4] samples/bpf: Use getppid instead of getpgrp for array map stress","commit_ref":null,"pull_url":null,"state":"accepted","archived":true,"hash":"cb039fbd363b3c506deb0f9469c195216539a4b3","submitter":{"id":72107,"url":"http://patchwork.ozlabs.org/api/people/72107/?format=json","name":"Joel Fernandes","email":"joelaf@google.com"},"delegate":{"id":34,"url":"http://patchwork.ozlabs.org/api/users/34/?format=json","username":"davem","first_name":"David","last_name":"Miller","email":"davem@davemloft.net"},"mbox":"http://patchwork.ozlabs.org/project/netdev/patch/20170920161159.25747-1-joelaf@google.com/mbox/","series":[{"id":4158,"url":"http://patchwork.ozlabs.org/api/series/4158/?format=json","web_url":"http://patchwork.ozlabs.org/project/netdev/list/?series=4158","date":"2017-09-20T16:04:32","name":"Add cross-compilation support to eBPF samples","version":4,"mbox":"http://patchwork.ozlabs.org/series/4158/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/816337/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/816337/checks/","tags":{},"related":[],"headers":{"Return-Path":"","X-Original-To":"patchwork-incoming@ozlabs.org","Delivered-To":"patchwork-incoming@ozlabs.org","Authentication-Results":["ozlabs.org;\n\tspf=none (mailfrom) smtp.mailfrom=vger.kernel.org\n\t(client-ip=209.132.180.67; helo=vger.kernel.org;\n\tenvelope-from=netdev-owner@vger.kernel.org;\n\treceiver=)","ozlabs.org; dkim=pass (2048-bit key;\n\tunprotected) header.d=google.com header.i=@google.com\n\theader.b=\"EIZ05XXP\"; dkim-atps=neutral"],"Received":["from vger.kernel.org (vger.kernel.org [209.132.180.67])\n\tby ozlabs.org (Postfix) with ESMTP id 3xy4Xr5CDQz9s7c\n\tfor ;\n\tThu, 21 Sep 2017 02:13:16 +1000 (AEST)","(majordomo@vger.kernel.org) by vger.kernel.org via listexpand\n\tid S1751902AbdITQMN (ORCPT );\n\tWed, 20 Sep 2017 12:12:13 -0400","from mail-pg0-f50.google.com ([74.125.83.50]:49543 \"EHLO\n\tmail-pg0-f50.google.com\" rhost-flags-OK-OK-OK-OK) by vger.kernel.org\n\twith ESMTP id S1751858AbdITQMM (ORCPT\n\t); Wed, 20 Sep 2017 12:12:12 -0400","by mail-pg0-f50.google.com with SMTP id m30so1934993pgn.6\n\tfor ; Wed, 20 Sep 2017 09:12:11 -0700 (PDT)","from joelaf-glaptop0.roam.corp.google.com ([73.93.152.222])\n\tby smtp.gmail.com with ESMTPSA id\n\tx9sm8767200pfk.40.2017.09.20.09.12.09\n\t(version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128);\n\tWed, 20 Sep 2017 09:12:10 -0700 (PDT)"],"DKIM-Signature":"v=1; a=rsa-sha256; c=relaxed/relaxed;\n\td=google.com; s=20161025;\n\th=from:to:cc:subject:date:message-id;\n\tbh=qul5PsmRgWLTfCC0ZEtP2dfrzE3wiv+yVs0WI8rTZ04=;\n\tb=EIZ05XXPCMhkXwKLhe5+k6Q5gcnBNayL2Ye1H+eWEox3rwKvSwcNW8iaglP5CAemDc\n\tvaXQtVR7AVmwZkfXlWjtF7c0B7QP/2dp/TZP09xIhXonCEUflaY2zHYCwke8OBtkdH0i\n\tk29qOhGpgGJa/UdbIgwKRU5o5MN5OWKtpaRDS39Zw2B+17DtaFCX7fRBOABQBdt0nvr/\n\t7jKvib/hOiZa2XFtFAtCYENq5BAG/3Nn/sMvOsBo+0cgwkT2I5RzLSeIca86/tkoyf8W\n\tXCfsvrIRO/hJc1e2JgaxuZAwInUPCb9hX3J6FfxVHzuOW0HrYGQNGcFetG9HF5pnuAUI\n\t8ytQ==","X-Google-DKIM-Signature":"v=1; a=rsa-sha256; c=relaxed/relaxed;\n\td=1e100.net; s=20161025;\n\th=x-gm-message-state:from:to:cc:subject:date:message-id;\n\tbh=qul5PsmRgWLTfCC0ZEtP2dfrzE3wiv+yVs0WI8rTZ04=;\n\tb=hHUZl5QbwHFXahyVVfmUDgrWs9RiJ/eDGncSZPnOKPUsHhMLn2QET5oC3tHd0SfXW1\n\tqCkz7koBHhQhjaZ7XlmZVhaTF+vUn/6Cp1jxjaKdGZ/GGBi6sRgyvvPAG12EgnRHJ5tK\n\ttGxImb4XO9IOFWuJ/57I+gc1hyC+kzSvoiYMEiVKfQzsIEJb4VUZNNHWFCeWgo2YDSa2\n\tei3u5WjMyg/fR0XnZH/A+WXh+Cll+vOIhrPUvkrmgvhfqPkhNIuiZ39PI4PDy0a7ewy5\n\tkI/svp9u4e2yVrj3xHGZVsQvFkCr75UFnb/h1nLeGSuh4jCtdILdaeEe9t/1nOrnz1Kp\n\tSUWA==","X-Gm-Message-State":"AHPjjUg9Ov5gM1wX4pPV5qMdQeu51SoZWYJLWsGiG7BxnBRGYkB6n83k\n\tCMEQ4oKwbK/njD3/IYLpSkN9Hg==","X-Google-Smtp-Source":"AOwi7QCzDoMYVGOFk/tLoQUFucudYLe29jFRPWEtqCbXp7DArKndxy5uiEoOVcAKjfDv2XA1AZxXgw==","X-Received":"by 10.99.151.2 with SMTP id n2mr2784297pge.315.1505923931246;\n\tWed, 20 Sep 2017 09:12:11 -0700 (PDT)","From":"Joel Fernandes ","To":"linux-kernel@vger.kernel.org","Cc":"netdev@vger.kernel.org, alison@she-devel.com, juri.lelli@arm.com,\n\tfengc@google.com, daniel@iogearbox.net, davem@davemloft.net,\n\tast@kernel.org, kernel-team@android.com,\n\tJoel Fernandes ","Subject":"[PATCH v4 1/4] samples/bpf: Use getppid instead of getpgrp for\n\tarray 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":"netdev-owner@vger.kernel.org","Precedence":"bulk","List-ID":"","X-Mailing-List":"netdev@vger.kernel.org"},"content":"When cross-compiling the bpf sample map_perf_test for aarch64, I find that\n__NR_getpgrp is undefined. This causes build errors. This syscall is deprecated\nand requires defining __ARCH_WANT_SYSCALL_DEPRECATED. To avoid having to define\nthat, just use a different syscall (getppid) for the array map stress test.\n\nAcked-by: Alexei Starovoitov \nSigned-off-by: Joel Fernandes \n---\n samples/bpf/map_perf_test_kern.c | 2 +-\n samples/bpf/map_perf_test_user.c | 2 +-\n 2 files changed, 2 insertions(+), 2 deletions(-)","diff":"diff --git a/samples/bpf/map_perf_test_kern.c b/samples/bpf/map_perf_test_kern.c\nindex 098c857f1eda..2b2ffb97018b 100644\n--- a/samples/bpf/map_perf_test_kern.c\n+++ b/samples/bpf/map_perf_test_kern.c\n@@ -266,7 +266,7 @@ int stress_hash_map_lookup(struct pt_regs *ctx)\n \treturn 0;\n }\n \n-SEC(\"kprobe/sys_getpgrp\")\n+SEC(\"kprobe/sys_getppid\")\n int stress_array_map_lookup(struct pt_regs *ctx)\n {\n \tu32 key = 1, i;\ndiff --git a/samples/bpf/map_perf_test_user.c b/samples/bpf/map_perf_test_user.c\nindex f388254896f6..a0310fc70057 100644\n--- a/samples/bpf/map_perf_test_user.c\n+++ b/samples/bpf/map_perf_test_user.c\n@@ -282,7 +282,7 @@ static void test_array_lookup(int cpu)\n \n \tstart_time = time_get_ns();\n \tfor (i = 0; i < max_cnt; i++)\n-\t\tsyscall(__NR_getpgrp, 0);\n+\t\tsyscall(__NR_getppid, 0);\n \tprintf(\"%d:array_lookup %lld lookups per sec\\n\",\n \t cpu, max_cnt * 1000000000ll * 64 / (time_get_ns() - start_time));\n }\n","prefixes":["v4","1/4"]}