https://github.com/llvmbot created https://github.com/llvm/llvm-project/pull/109072
Backport 773353b20a49bfa0dab608d415c1b4734d037fce Requested by: @tstellar >From 556f371381ba68d0c84a0f55c6535013e8950cd4 Mon Sep 17 00:00:00 2001 From: Tom Stellard <tstel...@redhat.com> Date: Tue, 17 Sep 2024 17:07:35 -0700 Subject: [PATCH] [bolt][tests] Skip tests that use perf when perf counters are unavailable (#107892) On the GitHub Action runners, perf always fails with the error below , so we need to skip the perf tests on platforms like this that have limited access to the perf counters. ``` Access to performance monitoring and observability operations is limited. Consider adjusting /proc/sys/kernel/perf_event_paranoid setting to open access to performance monitoring and observability operations for processes without CAP_PERFMON, CAP_SYS_PTRACE or CAP_SYS_ADMIN Linux capability. More information can be found at 'Perf events and tool security' document: https://www.kernel.org/doc/html/latest/admin-guide/perf-security.html perf_event_paranoid setting is 4: -1: Allow use of (almost) all events by all users Ignore mlock limit after perf_event_mlock_kb without CAP_IPC_LOCK >= 0: Disallow raw and ftrace function tracepoint access >= 1: Disallow CPU event access >= 2: Disallow kernel profiling To make the adjusted perf_event_paranoid setting permanent preserve it in /etc/sysctl.conf (e.g. kernel.perf_event_paranoid = <setting>) ``` (cherry picked from commit 773353b20a49bfa0dab608d415c1b4734d037fce) --- bolt/test/perf2bolt/lit.local.cfg | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/bolt/test/perf2bolt/lit.local.cfg b/bolt/test/perf2bolt/lit.local.cfg index 4ee9ad08cc78a0..0fecf913aa98b8 100644 --- a/bolt/test/perf2bolt/lit.local.cfg +++ b/bolt/test/perf2bolt/lit.local.cfg @@ -1,4 +1,5 @@ import shutil +import subprocess -if shutil.which("perf") is not None: - config.available_features.add("perf") \ No newline at end of file +if shutil.which("perf") is not None and subprocess.run(["perf", "record", "-e", "cycles:u", "-o", "/dev/null", "--", "perf", "--version"], capture_output=True).returncode == 0: + config.available_features.add("perf") _______________________________________________ llvm-branch-commits mailing list llvm-branch-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-branch-commits
