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author | Arnaldo Carvalho de Melo <acme@redhat.com> | 2018-04-18 12:59:03 -0300 |
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committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2018-04-18 15:35:53 -0300 |
commit | eccb1b936363c62544bccb5bbb75afec9536f7e3 (patch) | |
tree | ad9b8aab29d322d65e5fab662cc11755132c318b /tools | |
parent | 518c6021e9b82696819b380cd173e76cac55a01e (diff) | |
download | linux-eccb1b936363c62544bccb5bbb75afec9536f7e3.tar.gz |
perf test BPF: Fixup BPF test using epoll_pwait syscall function probe
Since e145242ea0df ("syscalls/core, syscalls/x86: Clean up syscall stub naming convention") changed the main syscall function for 'epoll_pwait' to something other than the expected 'SyS_epoll_pwait the' 'perf test BPF' entries started failing, fix it by using something called from the main syscall function instead, 'epoll_wait', which should keep this test working in older kernels too. Before: # perf test BPF 40: BPF filter : 40.1: Basic BPF filtering : FAILED! 40.2: BPF pinning : Skip 40.3: BPF prologue generation : Skip 40.4: BPF relocation checker : Skip If we use -v for that test we see the problem: Probe point 'SyS_epoll_pwait' not found. After: # perf test BPF 40: BPF filter : 40.1: Basic BPF filtering : Ok 40.2: BPF pinning : Ok 40.3: BPF prologue generation : Ok 40.4: BPF relocation checker : Ok # Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Dominik Brodowski <linux@dominikbrodowski.net> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Wang Nan <wangnan0@huawei.com> Link: https://lkml.kernel.org/r/tip-y24nmn70cs2am8jh4i344dng@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools')
-rw-r--r-- | tools/perf/tests/bpf-script-example.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/perf/tests/bpf-script-example.c b/tools/perf/tests/bpf-script-example.c index e4123c1b0e88..1ca5106df5f1 100644 --- a/tools/perf/tests/bpf-script-example.c +++ b/tools/perf/tests/bpf-script-example.c @@ -31,7 +31,7 @@ struct bpf_map_def SEC("maps") flip_table = { .max_entries = 1, }; -SEC("func=SyS_epoll_pwait") +SEC("func=do_epoll_wait") int bpf_func__SyS_epoll_pwait(void *ctx) { int ind =0; |