samples/bpf: add tests for more perf event types
authorTeng Qin <qinteng@fb.com>
Sat, 3 Jun 2017 04:03:53 +0000 (21:03 -0700)
committerDavid S. Miller <davem@davemloft.net>
Mon, 5 Jun 2017 01:58:15 +0000 (21:58 -0400)
commit41e9a8046c92e26a68fdf5a4cb831b7c60113602
tree63fab2b95741918a420f0a8d7b6eb3966e043fdb
parentf91840a32deef5cb1bf73338bc5010f843b01426
samples/bpf: add tests for more perf event types

$ trace_event

tests attaching BPF program to HW_CPU_CYCLES, SW_CPU_CLOCK, HW_CACHE_L1D and other events.
It runs 'dd' in the background while bpf program collects user and kernel
stack trace on counter overflow.
User space expects to see sys_read and sys_write in the kernel stack.

$ tracex6

tests reading of various perf counters from BPF program.

Both tests were refactored to increase coverage and be more accurate.

Signed-off-by: Teng Qin <qinteng@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
samples/bpf/bpf_helpers.h
samples/bpf/trace_event_user.c
samples/bpf/tracex6_kern.c
samples/bpf/tracex6_user.c