diff options
| author | Song Liu <[email protected]> | 2024-06-04 07:07:00 +0000 |
|---|---|---|
| committer | Andrii Nakryiko <[email protected]> | 2024-06-04 18:17:54 +0000 |
| commit | 61ce0ea7591fef2eb6e89ce40ffcc24fda4dbbc5 (patch) | |
| tree | 09649074f6ebde1305acef37c57614fa3b0e9d0d /tools/testing/selftests/bpf/prog_tests/find_vma.c | |
| parent | Merge branch 'enable-bpf-programs-to-declare-arrays-of-kptr-bpf_rb_root-and-b... (diff) | |
| download | kernel-61ce0ea7591fef2eb6e89ce40ffcc24fda4dbbc5.tar.gz kernel-61ce0ea7591fef2eb6e89ce40ffcc24fda4dbbc5.zip | |
selftests/bpf: Fix bpf_cookie and find_vma in nested VM
bpf_cookie and find_vma are flaky in nested VMs, which is used by some CI
systems. It turns out these failures are caused by unreliable perf event
in nested VM. Fix these by:
1. Use PERF_COUNT_SW_CPU_CLOCK in find_vma;
2. Increase sample_freq in bpf_cookie.
Signed-off-by: Song Liu <[email protected]>
Signed-off-by: Andrii Nakryiko <[email protected]>
Link: https://lore.kernel.org/bpf/[email protected]
Diffstat (limited to 'tools/testing/selftests/bpf/prog_tests/find_vma.c')
| -rw-r--r-- | tools/testing/selftests/bpf/prog_tests/find_vma.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/tools/testing/selftests/bpf/prog_tests/find_vma.c b/tools/testing/selftests/bpf/prog_tests/find_vma.c index 5165b38f0e59..f7619e0ade10 100644 --- a/tools/testing/selftests/bpf/prog_tests/find_vma.c +++ b/tools/testing/selftests/bpf/prog_tests/find_vma.c @@ -29,8 +29,8 @@ static int open_pe(void) /* create perf event */ attr.size = sizeof(attr); - attr.type = PERF_TYPE_HARDWARE; - attr.config = PERF_COUNT_HW_CPU_CYCLES; + attr.type = PERF_TYPE_SOFTWARE; + attr.config = PERF_COUNT_SW_CPU_CLOCK; attr.freq = 1; attr.sample_freq = 1000; pfd = syscall(__NR_perf_event_open, &attr, 0, -1, -1, PERF_FLAG_FD_CLOEXEC); |