perf lock contention: Add -G/--cgroup-filter option

[linux-2.6-microblaze.git] / tools / perf / util / bpf_skel / lock_contention.bpf.c

diff --git a/tools/perf/util/bpf_skel/lock_contention.bpf.c b/tools/perf/util/bpf_skel/lock_contention.bpf.c
index 8233549..4900a5d 100644 (file)
--- a/tools/perf/util/bpf_skel/lock_contention.bpf.c
+++ b/tools/perf/util/bpf_skel/lock_contention.bpf.c
@@ -92,6 +92,13 @@ struct {
        __uint(max_entries, 1);
 } addr_filter SEC(".maps");
 
+struct {
+       __uint(type, BPF_MAP_TYPE_HASH);
+       __uint(key_size, sizeof(__u64));
+       __uint(value_size, sizeof(__u8));
+       __uint(max_entries, 1);
+} cgroup_filter SEC(".maps");
+
 struct rw_semaphore___old {
        struct task_struct *owner;
 } __attribute__((preserve_access_index));
@@ -114,6 +121,7 @@ int has_cpu;
 int has_task;
 int has_type;
 int has_addr;
+int has_cgroup;
 int needs_callstack;
 int stack_skip;
 int lock_owner;
@@ -194,6 +202,15 @@ static inline int can_record(u64 *ctx)
                        return 0;
        }
 
+       if (has_cgroup) {
+               __u8 *ok;
+               __u64 cgrp = get_current_cgroup_id();
+
+               ok = bpf_map_lookup_elem(&cgroup_filter, &cgrp);
+               if (!ok)
+                       return 0;
+       }
+
        return 1;
 }