From: Christian Brauner christian.brauner@ubuntu.com

Add tests for the new PR_SCHED_CORE_SHARE command.

Cc: Peter Collingbourne pcc@google.com Cc: Dietmar Eggemann dietmar.eggemann@arm.com Cc: Joel Fernandes joel@joelfernandes.org Cc: Thomas Gleixner tglx@linutronix.de Cc: Mel Gorman mgorman@suse.de Cc: Vincent Guittot vincent.guittot@linaro.org Cc: Chris Hyser chris.hyser@oracle.com Cc: Shuah Khan shuah@kernel.org Cc: Juri Lelli juri.lelli@redhat.com Cc: Catalin Marinas catalin.marinas@arm.com Cc: Ingo Molnar mingo@redhat.com Cc: Daniel Bristot de Oliveira bristot@redhat.com Cc: Steven Rostedt rostedt@goodmis.org Cc: Ben Segall bsegall@google.com Cc: Balbir Singh sblbir@amazon.com Cc: Peter Zijlstra peterz@infradead.org Cc: linux-kernel@vger.kernel.org Cc: linux-kernel@vger.kernel.org Cc: linux-kselftest@vger.kernel.org Signed-off-by: Christian Brauner christian.brauner@ubuntu.com --- tools/testing/selftests/sched/cs_prctl_test.c | 23 +++++++++++++++++++ 1 file changed, 23 insertions(+)

diff --git a/tools/testing/selftests/sched/cs_prctl_test.c b/tools/testing/selftests/sched/cs_prctl_test.c index 8109b17dc764..985b83fe7221 100644 --- a/tools/testing/selftests/sched/cs_prctl_test.c +++ b/tools/testing/selftests/sched/cs_prctl_test.c @@ -229,6 +229,7 @@ int main(int argc, char *argv[]) int pidx; int pid; int opt; + int i;

while ((opt = getopt(argc, argv, ":hkT:P:d:")) != -1) { switch (opt) { @@ -325,6 +326,28 @@ int main(int argc, char *argv[]) validate(get_cs_cookie(pid) != 0); validate(get_cs_cookie(pid) == get_cs_cookie(procs[pidx].thr_tids[0]));

+ printf("\n## Set a new cookie on a single thread/PR_SCHED_CORE_SCOPE_THREAD [%d]\n", pid); + if (_prctl(PR_SCHED_CORE, PR_SCHED_CORE_CREATE, pid, PR_SCHED_CORE_SCOPE_THREAD, 0) < 0) + handle_error("core_sched create failed -- PR_SCHED_CORE_SCOPE_THREAD"); + disp_processes(num_processes, procs); + + validate(get_cs_cookie(pid) != get_cs_cookie(procs[pidx].thr_tids[0])); + + printf("\n## Copy cookie from a thread [%d] to [%d] as PR_SCHED_CORE_SCOPE_THREAD\n", pid, procs[pidx].thr_tids[0]); + if (_prctl(PR_SCHED_CORE, PR_SCHED_CORE_SHARE, procs[pidx].thr_tids[0], PR_SCHED_CORE_SCOPE_THREAD, pid) < 0) + handle_error("core_sched share cookie from and to thread failed -- PR_SCHED_CORE_SCOPE_THREAD"); + disp_processes(num_processes, procs); + + validate(get_cs_cookie(pid) == get_cs_cookie(procs[pidx].thr_tids[0])); + + printf("\n## Copy cookie from a thread [%d] to [%d] as PR_SCHED_CORE_SCOPE_THREAD_GROUP\n", pid, pid); + if (_prctl(PR_SCHED_CORE, PR_SCHED_CORE_SHARE, pid, PR_SCHED_CORE_SCOPE_THREAD_GROUP, pid) < 0) + handle_error("core_sched share cookie from and to thread-group failed -- PR_SCHED_CORE_SCOPE_THREAD_GROUP"); + disp_processes(num_processes, procs); + + for (i = 0; i < procs[pidx].num_threads; ++i) + validate(get_cs_cookie(pid) == get_cs_cookie(procs[pidx].thr_tids[i])); + if (errors) { printf("TESTS FAILED. errors: %d\n", errors); res = 10;