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Diffstat (limited to 'powerpc/pmu/ebb/back_to_back_ebbs_test.c')
-rw-r--r--powerpc/pmu/ebb/back_to_back_ebbs_test.c106
1 files changed, 0 insertions, 106 deletions
diff --git a/powerpc/pmu/ebb/back_to_back_ebbs_test.c b/powerpc/pmu/ebb/back_to_back_ebbs_test.c
deleted file mode 100644
index 66ea765..0000000
--- a/powerpc/pmu/ebb/back_to_back_ebbs_test.c
+++ /dev/null
@@ -1,106 +0,0 @@
-/*
- * Copyright 2014, Michael Ellerman, IBM Corp.
- * Licensed under GPLv2.
- */
-
-#include <stdbool.h>
-#include <stdio.h>
-#include <stdlib.h>
-
-#include "ebb.h"
-
-
-#define NUMBER_OF_EBBS 50
-
-/*
- * Test that if we overflow the counter while in the EBB handler, we take
- * another EBB on exiting from the handler.
- *
- * We do this by counting with a stupidly low sample period, causing us to
- * overflow the PMU while we're still in the EBB handler, leading to another
- * EBB.
- *
- * We get out of what would otherwise be an infinite loop by leaving the
- * counter frozen once we've taken enough EBBs.
- */
-
-static void ebb_callee(void)
-{
- uint64_t siar, val;
-
- val = mfspr(SPRN_BESCR);
- if (!(val & BESCR_PMEO)) {
- ebb_state.stats.spurious++;
- goto out;
- }
-
- ebb_state.stats.ebb_count++;
- trace_log_counter(ebb_state.trace, ebb_state.stats.ebb_count);
-
- /* Resets the PMC */
- count_pmc(1, sample_period);
-
-out:
- if (ebb_state.stats.ebb_count == NUMBER_OF_EBBS)
- /* Reset but leave counters frozen */
- reset_ebb_with_clear_mask(MMCR0_PMAO);
- else
- /* Unfreezes */
- reset_ebb();
-
- /* Do some stuff to chew some cycles and pop the counter */
- siar = mfspr(SPRN_SIAR);
- trace_log_reg(ebb_state.trace, SPRN_SIAR, siar);
-
- val = mfspr(SPRN_PMC1);
- trace_log_reg(ebb_state.trace, SPRN_PMC1, val);
-
- val = mfspr(SPRN_MMCR0);
- trace_log_reg(ebb_state.trace, SPRN_MMCR0, val);
-}
-
-int back_to_back_ebbs(void)
-{
- struct event event;
-
- event_init_named(&event, 0x1001e, "cycles");
- event_leader_ebb_init(&event);
-
- event.attr.exclude_kernel = 1;
- event.attr.exclude_hv = 1;
- event.attr.exclude_idle = 1;
-
- FAIL_IF(event_open(&event));
-
- setup_ebb_handler(ebb_callee);
-
- FAIL_IF(ebb_event_enable(&event));
-
- sample_period = 5;
-
- ebb_freeze_pmcs();
- mtspr(SPRN_PMC1, pmc_sample_period(sample_period));
- ebb_global_enable();
- ebb_unfreeze_pmcs();
-
- while (ebb_state.stats.ebb_count < NUMBER_OF_EBBS)
- FAIL_IF(core_busy_loop());
-
- ebb_global_disable();
- ebb_freeze_pmcs();
-
- count_pmc(1, sample_period);
-
- dump_ebb_state();
-
- event_close(&event);
-
- FAIL_IF(ebb_state.stats.ebb_count != NUMBER_OF_EBBS);
-
- return 0;
-}
-
-int main(void)
-{
- return test_harness(back_to_back_ebbs, "back_to_back_ebbs");
-}