Commit-ID: d3280ce01e21a827daa50b0e9bdc8588c6f855d8 Gitweb: https://git.kernel.org/tip/d3280ce01e21a827daa50b0e9bdc8588c6f855d8 Author: Arnaldo Carvalho de Melo <a...@redhat.com> AuthorDate: Tue, 9 Jul 2019 16:27:01 -0300 Committer: Arnaldo Carvalho de Melo <a...@redhat.com> CommitDate: Tue, 9 Jul 2019 16:27:01 -0300
perf test: Auto bump rlimit(MEMLOCK) for BPF test sake I noticed that the 'perf test bpf' was failing: # perf test bpf 41: BPF filter : 41.1: Basic BPF filtering : Skip 41.2: BPF pinning : Skip 41.3: BPF prologue generation : Skip 41.4: BPF relocation checker : Skip # ulimit -l 64 # Using verbose mode we get just a line bout -EPERF being returned from libbpf's bpf_load_program_xattr(), that ends up being used in 'perf test bpf' initial program loading capability query: Missing basic BPF support, skip this test: Operation not permitted Not that informative, but on a separate problem when creating BPF maps bumping rlimit(MEMLOCK) helped, so I tried it here as well, works: # ulimit -l 128 # perf test bpf 41: BPF filter : 41.1: Basic BPF filtering : Ok 41.2: BPF pinning : Ok 41.3: BPF prologue generation : Ok 41.4: BPF relocation checker : Ok # So use the recently added rlimit__bump_memlock() helper: # ulimit -l 64 # perf test bpf 41: BPF filter : 41.1: Basic BPF filtering : Ok 41.2: BPF pinning : Ok 41.3: BPF prologue generation : Ok 41.4: BPF relocation checker : Ok # ulimit -l 64 # I.e. the bumping of memlock is restricted to the 'perf test' instance, not changing the global value. Cc: Adrian Hunter <adrian.hun...@intel.com> Cc: Alexei Starovoitov <a...@kernel.org> Cc: Daniel Borkmann <dan...@iogearbox.net> Cc: Jiri Olsa <jo...@kernel.org> Cc: Namhyung Kim <namhy...@kernel.org> Link: https://lkml.kernel.org/n/tip-b9fubkhr4jm192lu7y8hg...@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <a...@redhat.com> --- tools/perf/tests/builtin-test.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/tools/perf/tests/builtin-test.c b/tools/perf/tests/builtin-test.c index 66a82badc1d1..c3bec9d2c201 100644 --- a/tools/perf/tests/builtin-test.c +++ b/tools/perf/tests/builtin-test.c @@ -21,6 +21,7 @@ #include <subcmd/parse-options.h> #include "string2.h" #include "symbol.h" +#include "util/rlimit.h" #include <linux/kernel.h> #include <linux/string.h> #include <subcmd/exec-cmd.h> @@ -727,6 +728,11 @@ int cmd_test(int argc, const char **argv) if (skip != NULL) skiplist = intlist__new(skip); + /* + * Tests that create BPF maps, for instance, need more than the 64K + * default: + */ + rlimit__bump_memlock(); return __cmd_test(argc, argv, skiplist); }
