LXR linux/tools/testing/selftests/powerpc/pmu/ebb/multi_counter

   1/*
   2 * Copyright 2014, Michael Ellerman, IBM Corp.
   3 * Licensed under GPLv2.
   4 */
   5
   6#include <stdio.h>
   7#include <stdlib.h>
   8#include <sys/ioctl.h>
   9
  10#include "ebb.h"
  11
  12
  13/*
  14 * Test counting multiple events using EBBs.
  15 */
  16int multi_counter(void)
  17{
  18        struct event events[6];
  19        int i, group_fd;
  20
  21        SKIP_IF(!ebb_is_supported());
  22
  23        event_init_named(&events[0], 0x1001C, "PM_CMPLU_STALL_THRD");
  24        event_init_named(&events[1], 0x2D016, "PM_CMPLU_STALL_FXU");
  25        event_init_named(&events[2], 0x30006, "PM_CMPLU_STALL_OTHER_CMPL");
  26        event_init_named(&events[3], 0x4000A, "PM_CMPLU_STALL");
  27        event_init_named(&events[4], 0x600f4, "PM_RUN_CYC");
  28        event_init_named(&events[5], 0x500fa, "PM_RUN_INST_CMPL");
  29
  30        event_leader_ebb_init(&events[0]);
  31        for (i = 1; i < 6; i++)
  32                event_ebb_init(&events[i]);
  33
  34        group_fd = -1;
  35        for (i = 0; i < 6; i++) {
  36                events[i].attr.exclude_kernel = 1;
  37                events[i].attr.exclude_hv = 1;
  38                events[i].attr.exclude_idle = 1;
  39
  40                FAIL_IF(event_open_with_group(&events[i], group_fd));
  41                if (group_fd == -1)
  42                        group_fd = events[0].fd;
  43        }
  44
  45        ebb_enable_pmc_counting(1);
  46        ebb_enable_pmc_counting(2);
  47        ebb_enable_pmc_counting(3);
  48        ebb_enable_pmc_counting(4);
  49        ebb_enable_pmc_counting(5);
  50        ebb_enable_pmc_counting(6);
  51        setup_ebb_handler(standard_ebb_callee);
  52
  53        FAIL_IF(ioctl(events[0].fd, PERF_EVENT_IOC_ENABLE, PERF_IOC_FLAG_GROUP));
  54        FAIL_IF(event_read(&events[0]));
  55
  56        ebb_global_enable();
  57
  58        mtspr(SPRN_PMC1, pmc_sample_period(sample_period));
  59        mtspr(SPRN_PMC2, pmc_sample_period(sample_period));
  60        mtspr(SPRN_PMC3, pmc_sample_period(sample_period));
  61        mtspr(SPRN_PMC4, pmc_sample_period(sample_period));
  62        mtspr(SPRN_PMC5, pmc_sample_period(sample_period));
  63        mtspr(SPRN_PMC6, pmc_sample_period(sample_period));
  64
  65        while (ebb_state.stats.ebb_count < 50) {
  66                FAIL_IF(core_busy_loop());
  67                FAIL_IF(ebb_check_mmcr0());
  68        }
  69
  70        ebb_global_disable();
  71        ebb_freeze_pmcs();
  72
  73        count_pmc(1, sample_period);
  74        count_pmc(2, sample_period);
  75        count_pmc(3, sample_period);
  76        count_pmc(4, sample_period);
  77        count_pmc(5, sample_period);
  78        count_pmc(6, sample_period);
  79
  80        dump_ebb_state();
  81
  82        for (i = 0; i < 6; i++)
  83                event_close(&events[i]);
  84
  85        FAIL_IF(ebb_state.stats.ebb_count == 0);
  86
  87        return 0;
  88}
  89
  90int main(void)
  91{
  92        return test_harness(multi_counter, "multi_counter");
  93}
  94