mirror of
https://git.ffmpeg.org/ffmpeg.git
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114 lines
3.9 KiB
C
114 lines
3.9 KiB
C
/*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with FFmpeg; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "avassert.h"
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#include "macos_kperf.h"
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#include "thread.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <dlfcn.h>
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#define KPERF_LIST \
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F(int, kpc_get_counting, void) \
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F(int, kpc_force_all_ctrs_set, int) \
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F(int, kpc_set_counting, uint32_t) \
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F(int, kpc_set_thread_counting, uint32_t) \
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F(int, kpc_set_config, uint32_t, void *) \
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F(int, kpc_get_config, uint32_t, void *) \
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F(int, kpc_set_period, uint32_t, void *) \
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F(int, kpc_get_period, uint32_t, void *) \
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F(uint32_t, kpc_get_counter_count, uint32_t) \
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F(uint32_t, kpc_get_config_count, uint32_t) \
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F(int, kperf_sample_get, int *) \
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F(int, kpc_get_thread_counters, int, unsigned int, void *)
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#define F(ret, name, ...) \
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typedef ret name##proc(__VA_ARGS__); \
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static name##proc *name = NULL;
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KPERF_LIST
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#undef F
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#define CFGWORD_EL0A32EN_MASK (0x10000)
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#define CFGWORD_EL0A64EN_MASK (0x20000)
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#define CFGWORD_EL1EN_MASK (0x40000)
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#define CFGWORD_EL3EN_MASK (0x80000)
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#define CFGWORD_ALLMODES_MASK (0xf0000)
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#define CPMU_NONE 0
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#define CPMU_CORE_CYCLE 0x02
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#define CPMU_INST_A64 0x8c
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#define CPMU_INST_BRANCH 0x8d
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#define CPMU_SYNC_DC_LOAD_MISS 0xbf
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#define CPMU_SYNC_DC_STORE_MISS 0xc0
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#define CPMU_SYNC_DTLB_MISS 0xc1
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#define CPMU_SYNC_ST_HIT_YNGR_LD 0xc4
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#define CPMU_SYNC_BR_ANY_MISP 0xcb
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#define CPMU_FED_IC_MISS_DEM 0xd3
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#define CPMU_FED_ITLB_MISS 0xd4
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#define KPC_CLASS_FIXED_MASK (1 << 0)
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#define KPC_CLASS_CONFIGURABLE_MASK (1 << 1)
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#define KPC_CLASS_POWER_MASK (1 << 2)
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#define KPC_CLASS_RAWPMU_MASK (1 << 3)
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#define COUNTERS_COUNT 10
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#define CONFIG_COUNT 8
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#define KPC_MASK (KPC_CLASS_CONFIGURABLE_MASK | KPC_CLASS_FIXED_MASK)
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static void kperf_init(void)
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{
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uint64_t config[COUNTERS_COUNT] = {0};
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void *kperf = NULL;
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av_assert0(kperf = dlopen("/System/Library/PrivateFrameworks/kperf.framework/Versions/A/kperf", RTLD_LAZY));
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#define F(ret, name, ...) av_assert0(name = (name##proc *)(dlsym(kperf, #name)));
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KPERF_LIST
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#undef F
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av_assert0(kpc_get_counter_count(KPC_MASK) == COUNTERS_COUNT);
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av_assert0(kpc_get_config_count(KPC_MASK) == CONFIG_COUNT);
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config[0] = CPMU_CORE_CYCLE | CFGWORD_EL0A64EN_MASK;
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// config[3] = CPMU_INST_BRANCH | CFGWORD_EL0A64EN_MASK;
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// config[4] = CPMU_SYNC_BR_ANY_MISP | CFGWORD_EL0A64EN_MASK;
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// config[5] = CPMU_INST_A64 | CFGWORD_EL0A64EN_MASK;
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av_assert0(kpc_set_config(KPC_MASK, config) == 0 || !"the kperf API needs to be run as root");
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av_assert0(kpc_force_all_ctrs_set(1) == 0);
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av_assert0(kpc_set_counting(KPC_MASK) == 0);
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av_assert0(kpc_set_thread_counting(KPC_MASK) == 0);
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}
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void ff_kperf_init(void)
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{
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static AVOnce init_static_once = AV_ONCE_INIT;
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ff_thread_once(&init_static_once, kperf_init);
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}
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uint64_t ff_kperf_cycles()
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{
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uint64_t counters[COUNTERS_COUNT];
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if (kpc_get_thread_counters(0, COUNTERS_COUNT, counters)) {
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return -1;
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}
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return counters[0];
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}
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