From ba1fae431e74bb427a699187434142fd3fe98390 Mon Sep 17 00:00:00 2001 From: Wang Nan Date: Fri, 6 Nov 2015 13:49:43 +0000 Subject: perf test: Add 'perf test BPF' This patch adds BPF testcase for testing BPF event filtering. By utilizing the result of 'perf test LLVM', this patch compiles the eBPF sample program then test its ability. The BPF script in 'perf test LLVM' lets only 50% samples generated by epoll_pwait() to be captured. This patch runs that system call for 111 times, so the result should contain 56 samples. Signed-off-by: Wang Nan Tested-by: Arnaldo Carvalho de Melo Cc: Alexei Starovoitov Cc: Jiri Olsa Cc: Namhyung Kim Cc: Zefan Li Cc: pi3orama@163.com Link: http://lkml.kernel.org/r/1446817783-86722-8-git-send-email-wangnan0@huawei.com Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/util/bpf-loader.c | 24 +++++++++++++++++++++++- 1 file changed, 23 insertions(+), 1 deletion(-) (limited to 'tools/perf/util/bpf-loader.c') diff --git a/tools/perf/util/bpf-loader.c b/tools/perf/util/bpf-loader.c index e3afa1b..4c50411 100644 --- a/tools/perf/util/bpf-loader.c +++ b/tools/perf/util/bpf-loader.c @@ -34,10 +34,32 @@ struct bpf_prog_priv { struct perf_probe_event pev; }; +static bool libbpf_initialized; + +struct bpf_object * +bpf__prepare_load_buffer(void *obj_buf, size_t obj_buf_sz, const char *name) +{ + struct bpf_object *obj; + + if (!libbpf_initialized) { + libbpf_set_print(libbpf_warning, + libbpf_info, + libbpf_debug); + libbpf_initialized = true; + } + + obj = bpf_object__open_buffer(obj_buf, obj_buf_sz, name); + if (IS_ERR(obj)) { + pr_debug("bpf: failed to load buffer\n"); + return ERR_PTR(-EINVAL); + } + + return obj; +} + struct bpf_object *bpf__prepare_load(const char *filename, bool source) { struct bpf_object *obj; - static bool libbpf_initialized; if (!libbpf_initialized) { libbpf_set_print(libbpf_warning, -- cgit v1.1