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         event_init_named(&events[0], 0x1001C, "PM_CMPLU_STALL_THRD");
  22         event_init_named(&events[1], 0x2D016, "PM_CMPLU_STALL_FXU");
  23         event_init_named(&events[2], 0x30006, "PM_CMPLU_STALL_OTHER_CMPL");
  24         event_init_named(&events[3], 0x4000A, "PM_CMPLU_STALL");
  25         event_init_named(&events[4], 0x600f4, "PM_RUN_CYC");
  26         event_init_named(&events[5], 0x500fa, "PM_RUN_INST_CMPL");
  27
  28         event_leader_ebb_init(&events[0]);
  29         for (i = 1; i < 6; i++)
  30                 event_ebb_init(&events[i]);
  31
  32         group_fd = -1;
  33         for (i = 0; i < 6; i++) {
  34                 events[i].attr.exclude_kernel = 1;
  35                 events[i].attr.exclude_hv = 1;
  36                 events[i].attr.exclude_idle = 1;
  37
  38                 FAIL_IF(event_open_with_group(&events[i], group_fd));
  39                 if (group_fd == -1)
  40                         group_fd = events[0].fd;
  41         }
  42
  43         ebb_enable_pmc_counting(1);
  44         ebb_enable_pmc_counting(2);
  45         ebb_enable_pmc_counting(3);
  46         ebb_enable_pmc_counting(4);
  47         ebb_enable_pmc_counting(5);
  48         ebb_enable_pmc_counting(6);
  49         setup_ebb_handler(standard_ebb_callee);
  50
  51         FAIL_IF(ioctl(events[0].fd, PERF_EVENT_IOC_ENABLE, PERF_IOC_FLAG_GROUP));
  52         FAIL_IF(event_read(&events[0]));
  53
  54         ebb_global_enable();
  55
  56         mtspr(SPRN_PMC1, pmc_sample_period(sample_period));
  57         mtspr(SPRN_PMC2, pmc_sample_period(sample_period));
  58         mtspr(SPRN_PMC3, pmc_sample_period(sample_period));
  59         mtspr(SPRN_PMC4, pmc_sample_period(sample_period));
  60         mtspr(SPRN_PMC5, pmc_sample_period(sample_period));
  61         mtspr(SPRN_PMC6, pmc_sample_period(sample_period));
  62
  63         while (ebb_state.stats.ebb_count < 50) {
  64                 FAIL_IF(core_busy_loop());
  65                 FAIL_IF(ebb_check_mmcr0());
  66         }
  67
  68         ebb_global_disable();
  69         ebb_freeze_pmcs();
  70
  71         count_pmc(1, sample_period);
  72         count_pmc(2, sample_period);
  73         count_pmc(3, sample_period);
  74         count_pmc(4, sample_period);
  75         count_pmc(5, sample_period);
  76         count_pmc(6, sample_period);
  77
  78         dump_ebb_state();
  79
  80         for (i = 0; i < 6; i++)
  81                 event_close(&events[i]);
  82
  83         FAIL_IF(ebb_state.stats.ebb_count == 0);
  84
  85         return 0;
  86 }
  87
  88 int main(void)
  89 {
  90         return test_harness(multi_counter, "multi_counter");
  91 }