1
2
3
4
5
6#include <signal.h>
7#include <stdio.h>
8#include <stdlib.h>
9#include <stdbool.h>
10#include <sys/types.h>
11#include <sys/wait.h>
12#include <unistd.h>
13
14#include "ebb.h"
15
16
17
18
19
20
21
22static int setup_cpu_event(struct event *event, int cpu)
23{
24 event_init_named(event, 0x400FA, "PM_RUN_INST_CMPL");
25
26 event->attr.exclude_kernel = 1;
27 event->attr.exclude_hv = 1;
28 event->attr.exclude_idle = 1;
29
30 SKIP_IF(require_paranoia_below(1));
31 FAIL_IF(event_open_with_cpu(event, cpu));
32 FAIL_IF(event_enable(event));
33
34 return 0;
35}
36
37int cpu_event_vs_ebb(void)
38{
39 union pipe read_pipe, write_pipe;
40 struct event event;
41 int cpu, rc;
42 pid_t pid;
43
44 SKIP_IF(!ebb_is_supported());
45
46 cpu = pick_online_cpu();
47 FAIL_IF(cpu < 0);
48 FAIL_IF(bind_to_cpu(cpu));
49
50 FAIL_IF(pipe(read_pipe.fds) == -1);
51 FAIL_IF(pipe(write_pipe.fds) == -1);
52
53 pid = fork();
54 if (pid == 0) {
55
56 exit(ebb_child(write_pipe, read_pipe));
57 }
58
59
60 rc = setup_cpu_event(&event, cpu);
61 if (rc) {
62 kill_child_and_wait(pid);
63 return rc;
64 }
65
66
67 if (sync_with_child(read_pipe, write_pipe))
68
69 goto wait;
70
71
72 FAIL_IF(sync_with_child(read_pipe, write_pipe));
73
74wait:
75
76 FAIL_IF(wait_for_child(pid));
77
78 FAIL_IF(event_disable(&event));
79 FAIL_IF(event_read(&event));
80
81 event_report(&event);
82
83
84
85 return 0;
86}
87
88int main(void)
89{
90 return test_harness(cpu_event_vs_ebb, "cpu_event_vs_ebb");
91}
92