kernel/tools/testing/selftests/powerpc/pmu/ebb/multi_counter_test.c

   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  */
  16 int 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
  90 int main(void)
  91 {
  92         return test_harness(multi_counter, "multi_counter");
  93 }