pmu.c

 1// SPDX-License-Identifier: GPL-2.0
 2
 3#include "../../../util/pmu.h"
 4#include "../../../util/pmus.h"
 5#include "../../../util/tool_pmu.h"
 6#include <api/fs/fs.h>
 7
 8u64 tool_pmu__cpu_slots_per_cycle(void)
 9{
10	char path[PATH_MAX];
11	unsigned long long slots = 0;
12	struct perf_pmu *pmu = perf_pmus__find_core_pmu();
13
14	if (pmu) {
15		perf_pmu__pathname_scnprintf(path, sizeof(path),
16					     pmu->name, "caps/slots");
17		/*
18		 * The value of slots is not greater than 32 bits, but
19		 * filename__read_int can't read value with 0x prefix,
20		 * so use filename__read_ull instead.
21		 */
22		filename__read_ull(path, &slots);
23	}
24
25	return slots;
26}