From: Tvrtko Ursulin <tvrtko.ursu...@intel.com> Print out end user friendly help text when the running user has insufficient privilege for accessing system wide performance counters.
Signed-off-by: Tvrtko Ursulin <tvrtko.ursu...@intel.com> Issue: https://gitlab.freedesktop.org/drm/intel/-/issues/5018 --- tools/intel_gpu_top.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/tools/intel_gpu_top.c b/tools/intel_gpu_top.c index 81c724d1fe1c..0404a5881b40 100644 --- a/tools/intel_gpu_top.c +++ b/tools/intel_gpu_top.c @@ -1761,6 +1761,15 @@ int main(int argc, char **argv) if (ret) { fprintf(stderr, "Failed to initialize PMU! (%s)\n", strerror(errno)); + if (errno == EACCES && geteuid()) + fprintf(stderr, +"\n" +"When running as a normal user CAP_PERFMON is required to access performance\n" +"monitoring. See \"man 7 capabilities\", \"man 8 setcap\", or contact your\n" +"distribution vendor for assistance.\n" +"\n" +"More information can be found at 'Perf events and tool security' document:\n" +"https://www.kernel.org/doc/html/latest/admin-guide/perf-security.html\n";); ret = EXIT_FAILURE; goto err; } -- 2.32.0
