tree 63fab2b95741918a420f0a8d7b6eb3966e043fdb
parent f91840a32deef5cb1bf73338bc5010f843b01426
author Teng Qin <qinteng@fb.com> 1496462633 -0700
committer David S. Miller <davem@davemloft.net> 1496627895 -0400

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>