| 1 | // SPDX-License-Identifier: GPL-2.0-only |
|---|---|
| 2 | /* |
| 3 | * Copyright 2014, Michael Ellerman, IBM Corp. |
| 4 | */ |
| 5 | |
| 6 | #include <stdio.h> |
| 7 | #include <stdlib.h> |
| 8 | |
| 9 | #include "ebb.h" |
| 10 | |
| 11 | |
| 12 | /* |
| 13 | * Basic test that counts user cycles and takes EBBs. |
| 14 | */ |
| 15 | int cycles(void) |
| 16 | { |
| 17 | struct event event; |
| 18 | |
| 19 | SKIP_IF(!ebb_is_supported()); |
| 20 | |
| 21 | event_init_named(e: &event, config: 0x1001e, name: "cycles"); |
| 22 | event_leader_ebb_init(e: &event); |
| 23 | |
| 24 | event.attr.exclude_kernel = 1; |
| 25 | event.attr.exclude_hv = 1; |
| 26 | event.attr.exclude_idle = 1; |
| 27 | |
| 28 | FAIL_IF(event_open(e: &event)); |
| 29 | |
| 30 | ebb_enable_pmc_counting(pmc: 1); |
| 31 | setup_ebb_handler(standard_ebb_callee); |
| 32 | ebb_global_enable(); |
| 33 | FAIL_IF(ebb_event_enable(e: &event)); |
| 34 | |
| 35 | mtspr(SPRN_PMC1, pmc_sample_period(value: sample_period)); |
| 36 | |
| 37 | while (ebb_state.stats.ebb_count < 10) { |
| 38 | FAIL_IF(core_busy_loop()); |
| 39 | FAIL_IF(ebb_check_mmcr0()); |
| 40 | } |
| 41 | |
| 42 | ebb_global_disable(); |
| 43 | ebb_freeze_pmcs(); |
| 44 | |
| 45 | dump_ebb_state(); |
| 46 | |
| 47 | event_close(e: &event); |
| 48 | |
| 49 | FAIL_IF(ebb_state.stats.ebb_count == 0); |
| 50 | FAIL_IF(!ebb_check_count(pmc: 1, sample_period, fudge: 100)); |
| 51 | |
| 52 | return 0; |
| 53 | } |
| 54 | |
| 55 | int main(void) |
| 56 | { |
| 57 | return test_harness(cycles, "cycles"); |
| 58 | } |
| 59 |