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perf tests: Add LLVM test for eBPF on-the-fly compiling

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Previous patches introduce llvm__compile_bpf() to compile source file to
eBPF object. This patch adds testcase to test it. It also tests libbpf
by opening generated object after applying next patch which introduces
HAVE_LIBBPF_SUPPORT option.

Since llvm__compile_bpf() prints long messages which users who don't
explicitly test llvm doesn't care, this patch set verbose to -1 to
suppress all debug, warning and error message, and hint user use 'perf
test -v' to see the full output.

For the same reason, if clang is not found in PATH and there's no [llvm]
section in .perfconfig, skip this test.

Signed-off-by: Wang Nan <wangnan0@huawei.com>
Acked-by: Alexei Starovoitov <ast@plumgrid.com>
Cc: Brendan Gregg <brendan.d.gregg@gmail.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: David Ahern <dsahern@gmail.com>
Cc: He Kuang <hekuang@huawei.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kaixu Xia <xiakaixu@huawei.com>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Zefan Li <lizefan@huawei.com>
Cc: pi3orama@163.com
Link: http://lkml.kernel.org/n/1436445342-1402-17-git-send-email-wangnan0@huawei.com
[ Add tools/lib/bpf/ to tools/perf/MANIFEST, so that the tarball targets build ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Wang Nan 2015-07-08 10:04:02 +00:00 • committed by Arnaldo Carvalho de Melo
parent 0c6d18bfd5
commit 9bc898c701
7 changed files with 124 additions and 0 deletions
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9
tools/perf/util/llvm-utils.c
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@ -22,6 +22,7 @@ struct llvm_param llvm_param = {
.clang_opt = NULL,
.kbuild_dir = NULL,
.kbuild_opts = NULL,
.user_set_param = false,
};
int perf_llvm_config(const char *var, const char *value)
@ -42,6 +43,7 @@ int perf_llvm_config(const char *var, const char *value)
llvm_param.kbuild_opts = strdup(value);
else
return -1;
llvm_param.user_set_param = true;
return 0;
}
@ -397,3 +399,10 @@ errout:
*p_obj_buf_sz = 0;
return err;
}
int llvm__search_clang(void)
{
char clang_path[PATH_MAX];
return search_program(llvm_param.clang_path, "clang", clang_path);
}