linux-kernel - [tip:perf/core] perf augmented_syscalls: Convert to bpf

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Message-ID: <tip-23z08bgizqnbc3qdsyl7jyyg@git.kernel.org>
Date:   Sat, 26 Jan 2019 02:13:26 -0800
From:   tip-bot for Arnaldo Carvalho de Melo <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     wangnan0@...wei.com, jolsa@...nel.org, hpa@...or.com,
        tglx@...utronix.de, adrian.hunter@...el.com, mingo@...nel.org,
        namhyung@...nel.org, linux-kernel@...r.kernel.org, acme@...hat.com,
        lclaudio@...hat.com
Subject: [tip:perf/core] perf augmented_syscalls: Convert to bpf_map()

Commit-ID:  76a06125dd57ed2c7559410168b543313fa0cc51
Gitweb:     https://git.kernel.org/tip/76a06125dd57ed2c7559410168b543313fa0cc51
Author:     Arnaldo Carvalho de Melo <acme@...hat.com>
AuthorDate: Thu, 24 Jan 2019 16:02:17 +0100
Committer:  Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Fri, 25 Jan 2019 15:12:11 +0100

perf augmented_syscalls: Convert to bpf_map()

To make the code more compact, end result is the same:

  # perf trace -e /home/acme/git/perf/tools/perf/examples/bpf/augmented_syscalls.c sleep 1
     0.000 ( 0.008 ms): sleep/9663 openat(dfd: CWD, filename: "/etc/ld.so.cache", flags: RDONLY|CLOEXEC) = 3
     0.022 ( 0.005 ms): sleep/9663 openat(dfd: CWD, filename: "/lib64/libc.so.6", flags: RDONLY|CLOEXEC) = 3
     0.226 ( 0.006 ms): sleep/9663 openat(dfd: CWD, filename: "/usr/lib/locale/locale-archive", flags: RDONLY|CLOEXEC) = 3
  #

Cc: Adrian Hunter <adrian.hunter@...el.com>
Cc: Jiri Olsa <jolsa@...nel.org>
Cc: Luis Cláudio Gonçalves <lclaudio@...hat.com>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Wang Nan <wangnan0@...wei.com>
Link: https://lkml.kernel.org/n/tip-23z08bgizqnbc3qdsyl7jyyg@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/examples/bpf/augmented_syscalls.c | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

diff --git a/tools/perf/examples/bpf/augmented_syscalls.c b/tools/perf/examples/bpf/augmented_syscalls.c
index b7dba114e36c..524fdb8534b3 100644
--- a/tools/perf/examples/bpf/augmented_syscalls.c
+++ b/tools/perf/examples/bpf/augmented_syscalls.c
@@ -19,12 +19,8 @@
 #include <stdio.h>
 #include <linux/socket.h>
 
-struct bpf_map SEC("maps") __augmented_syscalls__ = {
-       .type = BPF_MAP_TYPE_PERF_EVENT_ARRAY,
-       .key_size = sizeof(int),
-       .value_size = sizeof(u32),
-       .max_entries = __NR_CPUS__,
-};
+/* bpf-output associated map */
+bpf_map(__augmented_syscalls__, PERF_EVENT_ARRAY, int, u32, __NR_CPUS__);
 
 struct syscall_exit_args {
 	unsigned long long common_tp_fields;