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ARM: fix performance counters allocation

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Change-Id: Ie6c8beacf268462064f59b063d9c7b635c906dc4
This commit is contained in:
Balazs Gerofi
2019-06-05 14:00:12 +09:00
parent 99fba2df1c
commit bc4629dfb0
7 changed files with 49 additions and 22 deletions
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22
arch/arm64/kernel/perfctr.c
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@ -8,6 +8,7 @@
#include <string.h>
#include <ihk/mm.h>
#include <irq.h>
#include <process.h>
/*
* @ref.impl arch/arm64/kernel/perf_event.c
@ -198,6 +199,27 @@ int ihk_mc_perfctr_read_mask(unsigned long counter_mask, unsigned long *value)
return 0;
}
int ihk_mc_perfctr_alloc(struct thread *thread, int cpu_cycles)
{
int ret = -EINVAL;
int i = 1;
const int counters = ihk_mc_perf_get_num_counters();
// Counter 0 is only used for CPU cycles on ARM
if (cpu_cycles) {
i = 0;
}
for (; i < counters; i++) {
if (!(thread->pmc_alloc_map & (1 << i))) {
ret = i;
break;
}
}
return ret;
}
unsigned long ihk_mc_perfctr_read(int counter)
{
unsigned long count;