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 8 u64 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 } 27