{"id":809349,"url":"http://patchwork.ozlabs.org/api/1.0/patches/809349/?format=json","project":{"id":7,"url":"http://patchwork.ozlabs.org/api/1.0/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},"msgid":"<20170903182549.30866-1-joelaf@google.com>","date":"2017-09-03T18:25:46","name":"[RFC,v3,1/4] samples/bpf: Use getppid instead of getpgrp for array map stress","commit_ref":null,"pull_url":null,"state":"rfc","archived":true,"hash":"cb039fbd363b3c506deb0f9469c195216539a4b3","submitter":{"id":72107,"url":"http://patchwork.ozlabs.org/api/1.0/people/72107/?format=json","name":"Joel Fernandes","email":"joelaf@google.com"},"delegate":{"id":34,"url":"http://patchwork.ozlabs.org/api/1.0/users/34/?format=json","username":"davem","first_name":"David","last_name":"Miller","email":"davem@davemloft.net"},"mbox":"http://patchwork.ozlabs.org/project/netdev/patch/20170903182549.30866-1-joelaf@google.com/mbox/","series":[{"id":1268,"url":"http://patchwork.ozlabs.org/api/1.0/series/1268/?format=json","date":"2017-09-03T18:23:21","name":"Add cross-compilation support to eBPF samples","version":3,"mbox":"http://patchwork.ozlabs.org/series/1268/mbox/"}],"check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/809349/checks/","tags":{},"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=\"plqrfSyf\"; dkim-atps=neutral"],"Received":["from vger.kernel.org (vger.kernel.org [209.132.180.67])\n\tby ozlabs.org (Postfix) with ESMTP id 3xlhKB3p5rz9sDB\n\tfor ;\n\tMon, 4 Sep 2017 04:27:09 +1000 (AEST)","(majordomo@vger.kernel.org) by vger.kernel.org via listexpand\n\tid S1752495AbdICS0F (ORCPT );\n\tSun, 3 Sep 2017 14:26:05 -0400","from mail-pg0-f52.google.com ([74.125.83.52]:34801 \"EHLO\n\tmail-pg0-f52.google.com\" rhost-flags-OK-OK-OK-OK) by vger.kernel.org\n\twith ESMTP id S1751389AbdICS0E (ORCPT\n\t); Sun, 3 Sep 2017 14:26:04 -0400","by mail-pg0-f52.google.com with SMTP id t193so13181126pgc.1\n\tfor ; Sun, 03 Sep 2017 11:26:03 -0700 (PDT)","from joelaf-glaptop0.roam.corp.google.com\n\t(74.sub-70-213-6.myvzw.com. [70.213.6.74])\n\tby smtp.gmail.com with ESMTPSA id\n\tp64sm7627440pfi.168.2017.09.03.11.26.01\n\t(version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128);\n\tSun, 03 Sep 2017 11:26:02 -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=Ddxd8StC/jzjd/s58gRiu3+70h4vJEQ/WCuDTX0qtiw=;\n\tb=plqrfSyfmU0fBbIITSJzTJy56+J6WWa9IsvuGCCMkYAC+fuf5Cy87HyXUJHsrdiRfq\n\t0bT8/hhKF8Y5SJjqqrrNOUOreprc5sEkSylAi9+XypY60b10Btb+uJKZGpVkVNTcmj2v\n\thp8GOjQK30ld6id/W30agqiX9W+11u9mIcRfSCaQljP7piRtghro0SgUGzldr0PC9pOP\n\tofoPaOkMmAohOJzxsb9Nrd2WFPJtYDcWK5QC2KOEOylxjsX2p+3CkUFsET5bnaLzlJLc\n\tnGQr36KlW6iK6AreU0SEKGzv/UOvzwqOAn+MSEUsSCcdbCZIjkHMbCr1g2uPhHmB3k97\n\tKM5w==","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=Ddxd8StC/jzjd/s58gRiu3+70h4vJEQ/WCuDTX0qtiw=;\n\tb=HvnRbaNrv0bDGahcIVzLMk5rf9QkjW28XqBny0QI9EaKG5WcRDyn2tOjc03tb5GY67\n\t6S4l6NVektIkTkXz1PL2IHlF2WCaig8FR/Tv8C6t4J1EhXk3tBZUPoNeBJuPwRTMXg8H\n\tAClgz5qN/v+N0GuXQB2jkAz/b8XxRKy9UtVk1i8NlbcTEOBZ6kdhyiTbUVKm06u0usXe\n\thNsBcis5Dosy0BmHOpw9ZWJab/BMFt6i3Er5Z2hJmnV9MId7YBaNmjP6/OL/jz9jHcbG\n\tLZfAK+Acygjn95987of0NzpbY+j4iOv1ruW5fsT1JPGefwKl/RpzoEM9ACEPJ7eSoLDR\n\t7oiA==","X-Gm-Message-State":"AHPjjUi/hqj3U2oyt/R2BB45Rj8cJmkjI93ah8yJr09RpGHOQt1w/AJz\n\taBxMLlAYcqI9ph1x","X-Google-Smtp-Source":"ADKCNb69cO99iFne62NzKZMe4tLel1MfFMSeYIpUuoxgGK6bTL1rwNtX8Y+Oxq/jvd6iPkPXrBh4Sg==","X-Received":"by 10.99.3.79 with SMTP id 76mr9709021pgd.211.1504463163387;\n\tSun, 03 Sep 2017 11:26:03 -0700 (PDT)","From":"Joel Fernandes ","To":"linux-kernel@vger.kernel.org, netdev@vger.kernel.org","Cc":"kernel-team@android.com, Juri Lelli ,\n\tAlison Chaiken , Chenbo Feng ,\n\tJoel Fernandes , Alexei Starovoitov ,\n\tDaniel Borkmann ,\n\tDavid Miller ","Subject":"[PATCH RFC v3 1/4] samples/bpf: Use getppid instead of getpgrp for\n\tarray map stress","Date":"Sun, 3 Sep 2017 11:25:46 -0700","Message-Id":"<20170903182549.30866-1-joelaf@google.com>","X-Mailer":"git-send-email 2.14.1.581.gf28d330327-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\nCC: Alexei Starovoitov \nCC: Daniel Borkmann \nCc: David Miller \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":["RFC","v3","1/4"]}