On Mon, Feb 17, 2020 at 7:04 PM Daniel Xu <dxu@xxxxxxxxx> wrote: > > Add a selftest to test: > > * default bpf_read_branch_records() behavior > * BPF_F_GET_BRANCH_RECORDS_SIZE flag behavior > * error path on non branch record perf events > * using helper to write to stack > * using helper to write to global > > On host with hardware counter support: > > # ./test_progs -t perf_branches > #27/1 perf_branches_hw:OK > #27/2 perf_branches_no_hw:OK > #27 perf_branches:OK > Summary: 1/2 PASSED, 0 SKIPPED, 0 FAILED > > On host without hardware counter support (VM): > > # ./test_progs -t perf_branches > #27/1 perf_branches_hw:OK > #27/2 perf_branches_no_hw:OK > #27 perf_branches:OK > Summary: 1/2 PASSED, 1 SKIPPED, 0 FAILED That's not what I see: ./test_progs -t perf_branches test_perf_branches_hw:FAIL:perf_event_open err -1 #27/1 perf_branches_hw:FAIL #27/2 perf_branches_no_hw:OK #27 perf_branches:FAIL Summary: 0/1 PASSED, 0 SKIPPED, 2 FAILED I remember previous version used to work, but something changed.
