Release 4.18 tools/testing/selftests/powerpc/pmu/ebb/ebb_vs_cpu_event_test.c
/*
* Copyright 2014, Michael Ellerman, IBM Corp.
* Licensed under GPLv2.
*/
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
#include "ebb.h"
/*
* Tests an EBB vs a cpu event - in that order. The EBB should force the cpu
* event off the PMU.
*/
static int setup_cpu_event(struct event *event, int cpu)
{
event_init_named(event, 0x400FA, "PM_RUN_INST_CMPL");
event->attr.exclude_kernel = 1;
event->attr.exclude_hv = 1;
event->attr.exclude_idle = 1;
SKIP_IF(require_paranoia_below(1));
FAIL_IF(event_open_with_cpu(event, cpu));
FAIL_IF(event_enable(event));
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Michael Ellerman | 76 | 100.00% | 1 | 100.00% |
| Total | 76 | 100.00% | 1 | 100.00% |
int ebb_vs_cpu_event(void)
{
union pipe read_pipe, write_pipe;
struct event event;
int cpu, rc;
pid_t pid;
SKIP_IF(!ebb_is_supported());
cpu = pick_online_cpu();
FAIL_IF(cpu < 0);
FAIL_IF(bind_to_cpu(cpu));
FAIL_IF(pipe(read_pipe.fds) == -1);
FAIL_IF(pipe(write_pipe.fds) == -1);
pid = fork();
if (pid == 0) {
/* NB order of pipes looks reversed */
exit(ebb_child(write_pipe, read_pipe));
}
/* Signal the child to install its EBB event and wait */
FAIL_IF(sync_with_child(read_pipe, write_pipe));
/* Now try to install our CPU event */
rc = setup_cpu_event(&event, cpu);
if (rc) {
kill_child_and_wait(pid);
return rc;
}
/* Signal the child to run */
FAIL_IF(sync_with_child(read_pipe, write_pipe));
/* .. and wait for it to complete */
FAIL_IF(wait_for_child(pid));
FAIL_IF(event_disable(&event));
FAIL_IF(event_read(&event));
event_report(&event);
/* The cpu event may have run, but we don't expect 100% */
FAIL_IF(event.result.enabled >= event.result.running);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Michael Ellerman | 194 | 96.52% | 1 | 50.00% |
| Denis Kirjanov | 7 | 3.48% | 1 | 50.00% |
| Total | 201 | 100.00% | 2 | 100.00% |
int main(void)
{
return test_harness(ebb_vs_cpu_event, "ebb_vs_cpu_event");
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Michael Ellerman | 15 | 100.00% | 1 | 100.00% |
| Total | 15 | 100.00% | 1 | 100.00% |
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Michael Ellerman | 311 | 97.80% | 1 | 50.00% |
| Denis Kirjanov | 7 | 2.20% | 1 | 50.00% |
| Total | 318 | 100.00% | 2 | 100.00% |
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