Yonghong Song 35697c12d7 selftests/bpf: Fix test_progs send_signal flakiness with nmi mode ... Alexei observed that test_progs send_signal may fail if run with command line "./test_progs" and the tests will pass if just run "./test_progs -n 40". I observed similar issue with nmi subtest failure and added a delay 100 us in Commit ab8b7f0cb3 ("tools/bpf: Add self tests for bpf_send_signal_thread()") and the problem is gone for me. But the issue still exists in Alexei's testing environment. The current code uses sample_freq = 50 (50 events/second), which may not be enough. But if the sample_freq value is larger than sysctl kernel/perf_event_max_sample_rate, the perf_event_open syscall will fail. This patch changed nmi perf testing to use sample_period = 1, which means trying to sampling every event. This seems fixing the issue. Fixes: ab8b7f0cb3 ("tools/bpf: Add self tests for bpf_send_signal_thread()") Signed-off-by: Yonghong Song <yhs@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Andrii Nakryiko <andriin@fb.com> Link: https://lore.kernel.org/bpf/20200116174004.1522812-1-yhs@fb.com		2020-01-16 13:28:57 -08:00
..
fault-injection	docs: fault-injection: convert docs to ReST and rename to *.rst	2019-06-14 14:21:07 -06:00
ktest	ktest: Fix some typos in config-bisect.pl	2019-07-24 15:37:18 -04:00
kunit	kunit/kunit_tool_test: Test '--build_dir' option run	2019-12-23 10:52:41 -07:00
nvdimm	tools/testing/nvdimm: Fix mock support for ioremap	2019-12-11 17:11:10 -08:00
radix-tree	Merge branch 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2019-07-08 15:45:14 -07:00
scatterlist	treewide: Add SPDX license identifier - Makefile/Kconfig	2019-05-21 10:50:46 +02:00
selftests	selftests/bpf: Fix test_progs send_signal flakiness with nmi mode	2020-01-16 13:28:57 -08:00
vsock	vsock_test: add SOCK_STREAM MSG_PEEK test	2019-12-20 21:09:21 -08:00