JustOS/linux-6.13/tools/perf/arch/arm64/util/pmu.c

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2025-01-24 14:00:19 +00:00
// SPDX-License-Identifier: GPL-2.0
#include "../../../util/pmu.h"
#include "../../../util/pmus.h"
#include "../../../util/tool_pmu.h"
#include <api/fs/fs.h>
u64 tool_pmu__cpu_slots_per_cycle(void)
{
char path[PATH_MAX];
unsigned long long slots = 0;
struct perf_pmu *pmu = perf_pmus__find_core_pmu();
if (pmu) {
perf_pmu__pathname_scnprintf(path, sizeof(path),
pmu->name, "caps/slots");
/*
* The value of slots is not greater than 32 bits, but
* filename__read_int can't read value with 0x prefix,
* so use filename__read_ull instead.
*/
filename__read_ull(path, &slots);
}
return slots;
}