Messages in this thread Patch in this message | | | From | Arnaldo Carvalho de Melo <> | Subject | [PATCH 02/28] perf test: Auto bump rlimit(MEMLOCK) for BPF test sake | Date | Mon, 15 Jul 2019 18:11:34 -0300 |
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From: Arnaldo Carvalho de Melo <acme@redhat.com>
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.hunter@intel.com> Cc: Alexei Starovoitov <ast@kernel.org> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Link: https://lkml.kernel.org/n/tip-b9fubkhr4jm192lu7y8hgjvo@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@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); } -- 2.21.0
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