• Alexei Starovoitov's avatar
    samples/bpf: add perf_event+bpf example · 1c47910e
    Alexei Starovoitov authored
    The bpf program is called 50 times a second and does hashmap[kern&user_stackid]++
    It's primary purpose to check that key bpf helpers like map lookup, update,
    get_stackid, trace_printk and ctx access are all working.
    It checks:
    - PERF_COUNT_HW_CPU_CYCLES on all cpus
    - PERF_COUNT_HW_CPU_CYCLES for current process and inherited perf_events to children
    - PERF_COUNT_SW_CPU_CLOCK on all cpus
    - PERF_COUNT_SW_CPU_CLOCK for current process
    Signed-off-by: default avatarAlexei Starovoitov <ast@kernel.org>
    Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>