2 * Copyright 2014, Michael Ellerman, IBM Corp.
3 * Licensed under GPLv2.
10 #include <sys/types.h>
18 * Tests an EBB vs a cpu event - in that order. The EBB should force the cpu
22 static int setup_cpu_event(struct event *event, int cpu)
24 event_init_named(event, 0x400FA, "PM_RUN_INST_CMPL");
26 event->attr.exclude_kernel = 1;
27 event->attr.exclude_hv = 1;
28 event->attr.exclude_idle = 1;
30 SKIP_IF(require_paranoia_below(1));
31 FAIL_IF(event_open_with_cpu(event, cpu));
32 FAIL_IF(event_enable(event));
37 int ebb_vs_cpu_event(void)
39 union pipe read_pipe, write_pipe;
44 SKIP_IF(!ebb_is_supported());
46 cpu = pick_online_cpu();
48 FAIL_IF(bind_to_cpu(cpu));
50 FAIL_IF(pipe(read_pipe.fds) == -1);
51 FAIL_IF(pipe(write_pipe.fds) == -1);
55 /* NB order of pipes looks reversed */
56 exit(ebb_child(write_pipe, read_pipe));
59 /* Signal the child to install its EBB event and wait */
60 FAIL_IF(sync_with_child(read_pipe, write_pipe));
62 /* Now try to install our CPU event */
63 rc = setup_cpu_event(&event, cpu);
65 kill_child_and_wait(pid);
69 /* Signal the child to run */
70 FAIL_IF(sync_with_child(read_pipe, write_pipe));
72 /* .. and wait for it to complete */
73 FAIL_IF(wait_for_child(pid));
74 FAIL_IF(event_disable(&event));
75 FAIL_IF(event_read(&event));
79 /* The cpu event may have run, but we don't expect 100% */
80 FAIL_IF(event.result.enabled >= event.result.running);
87 return test_harness(ebb_vs_cpu_event, "ebb_vs_cpu_event");