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authorDaniel T. Lee <danieltimlee@gmail.com>2020-08-23 17:53:34 +0900
committerAlexei Starovoitov <ast@kernel.org>2020-08-24 20:59:35 -0700
commitf0c328f8af5d920a68f8217aec76d9a45288cef1 (patch)
tree21b45294c5ef83066fac094eab783df052db0015 /samples/bpf/cpustat_kern.c
parent3677d0a13171bb1dc8db0af84d48dea14a899962 (diff)
samples: bpf: Refactor tracepoint tracing programs with libbpf
For the problem of increasing fragmentation of the bpf loader programs, instead of using bpf_loader.o, which is used in samples/bpf, this commit refactors the existing tracepoint tracing programs with libbbpf bpf loader. - Adding a tracepoint event and attaching a bpf program to it was done through bpf_program_attach(). - Instead of using the existing BPF MAP definition, MAP definition has been refactored with the new BTF-defined MAP format. Signed-off-by: Daniel T. Lee <danieltimlee@gmail.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20200823085334.9413-4-danieltimlee@gmail.com
Diffstat (limited to 'samples/bpf/cpustat_kern.c')
-rw-r--r--samples/bpf/cpustat_kern.c36
1 files changed, 18 insertions, 18 deletions
diff --git a/samples/bpf/cpustat_kern.c b/samples/bpf/cpustat_kern.c
index a86a19d5f033..5aefd19cdfa1 100644
--- a/samples/bpf/cpustat_kern.c
+++ b/samples/bpf/cpustat_kern.c
@@ -51,28 +51,28 @@ static int cpu_opps[] = { 208000, 432000, 729000, 960000, 1200000 };
#define MAP_OFF_PSTATE_IDX 3
#define MAP_OFF_NUM 4
-struct bpf_map_def SEC("maps") my_map = {
- .type = BPF_MAP_TYPE_ARRAY,
- .key_size = sizeof(u32),
- .value_size = sizeof(u64),
- .max_entries = MAX_CPU * MAP_OFF_NUM,
-};
+struct {
+ __uint(type, BPF_MAP_TYPE_ARRAY);
+ __type(key, u32);
+ __type(value, u64);
+ __uint(max_entries, MAX_CPU * MAP_OFF_NUM);
+} my_map SEC(".maps");
/* cstate_duration records duration time for every idle state per CPU */
-struct bpf_map_def SEC("maps") cstate_duration = {
- .type = BPF_MAP_TYPE_ARRAY,
- .key_size = sizeof(u32),
- .value_size = sizeof(u64),
- .max_entries = MAX_CPU * MAX_CSTATE_ENTRIES,
-};
+struct {
+ __uint(type, BPF_MAP_TYPE_ARRAY);
+ __type(key, u32);
+ __type(value, u64);
+ __uint(max_entries, MAX_CPU * MAX_CSTATE_ENTRIES);
+} cstate_duration SEC(".maps");
/* pstate_duration records duration time for every operating point per CPU */
-struct bpf_map_def SEC("maps") pstate_duration = {
- .type = BPF_MAP_TYPE_ARRAY,
- .key_size = sizeof(u32),
- .value_size = sizeof(u64),
- .max_entries = MAX_CPU * MAX_PSTATE_ENTRIES,
-};
+struct {
+ __uint(type, BPF_MAP_TYPE_ARRAY);
+ __type(key, u32);
+ __type(value, u64);
+ __uint(max_entries, MAX_CPU * MAX_PSTATE_ENTRIES);
+} pstate_duration SEC(".maps");
/*
* The trace events for cpu_idle and cpu_frequency are taken from: