From 616ad3f4aac287c48b66c92cb777395b4465ed4f Mon Sep 17 00:00:00 2001 From: "Naveen N. Rao" Date: Tue, 22 Nov 2022 12:10:53 +0530 Subject: [PATCH] selftests/powerpc: Bump up rlimit for perf-hwbreak test The systemwide perf hardware breakpoint test tries to open a perf event on each cpu. On large systems, we run out of file descriptors and fail the test. Instead, have the test set the file descriptor limit to an arbitraty high value. Reported-by: Rohan Deshpande Signed-off-by: Naveen N. Rao Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/187fed5843cecc1e5066677b6296ee88337d7bef.1669096083.git.naveen.n.rao@linux.vnet.ibm.com --- tools/testing/selftests/powerpc/ptrace/perf-hwbreak.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/tools/testing/selftests/powerpc/ptrace/perf-hwbreak.c b/tools/testing/selftests/powerpc/ptrace/perf-hwbreak.c index ea5e14e..866e5be 100644 --- a/tools/testing/selftests/powerpc/ptrace/perf-hwbreak.c +++ b/tools/testing/selftests/powerpc/ptrace/perf-hwbreak.c @@ -26,6 +26,7 @@ #include #include #include +#include #include #include #include @@ -140,8 +141,19 @@ static void disable_fds(int *fd, int n) static int perf_systemwide_event_open(int *fd, __u32 type, __u64 addr, __u64 len) { + struct rlimit rlim; int i = 0; + if (getrlimit(RLIMIT_NOFILE, &rlim)) { + perror("getrlimit"); + return -1; + } + rlim.rlim_cur = 65536; + if (setrlimit(RLIMIT_NOFILE, &rlim)) { + perror("setrlimit"); + return -1; + } + /* Assume online processors are 0 to nprocs for simplisity */ for (i = 0; i < nprocs; i++) { fd[i] = perf_cpu_event_open(i, type, addr, len); -- 2.7.4