lavu/checkasm: add (private) kperf timing for macOS

Signed-off-by: J. Dekker <jdek@itanimul.li>

1 files changed, 144 insertions, 0 deletions

diff --git a/libavutil/macos_kperf.c b/libavutil/macos_kperf.c
new file mode 100644
index 0000000000..cb229130f5
--- /dev/null
+++ b/libavutil/macos_kperf.c
@@ -0,0 +1,144 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with FFmpeg; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "macos_kperf.h"
+#include <stdio.h>
+#include <stdlib.h>
+#include <dlfcn.h>
+
+#define KPERF_LIST                                             \
+    F(int, kpc_get_counting, void)                             \
+    F(int, kpc_force_all_ctrs_set, int)                        \
+    F(int, kpc_set_counting, uint32_t)                         \
+    F(int, kpc_set_thread_counting, uint32_t)                  \
+    F(int, kpc_set_config, uint32_t, void *)                   \
+    F(int, kpc_get_config, uint32_t, void *)                   \
+    F(int, kpc_set_period, uint32_t, void *)                   \
+    F(int, kpc_get_period, uint32_t, void *)                   \
+    F(uint32_t, kpc_get_counter_count, uint32_t)               \
+    F(uint32_t, kpc_get_config_count, uint32_t)                \
+    F(int, kperf_sample_get, int *)                            \
+    F(int, kpc_get_thread_counters, int, unsigned int, void *)
+
+#define F(ret, name, ...)                                      \
+    typedef ret name##proc(__VA_ARGS__);                       \
+    static name##proc *name = NULL;
+KPERF_LIST
+#undef F
+
+#define CFGWORD_EL0A32EN_MASK (0x10000)
+#define CFGWORD_EL0A64EN_MASK (0x20000)
+#define CFGWORD_EL1EN_MASK    (0x40000)
+#define CFGWORD_EL3EN_MASK    (0x80000)
+#define CFGWORD_ALLMODES_MASK (0xf0000)
+
+#define CPMU_NONE 0
+#define CPMU_CORE_CYCLE 0x02
+#define CPMU_INST_A64 0x8c
+#define CPMU_INST_BRANCH 0x8d
+#define CPMU_SYNC_DC_LOAD_MISS 0xbf
+#define CPMU_SYNC_DC_STORE_MISS 0xc0
+#define CPMU_SYNC_DTLB_MISS 0xc1
+#define CPMU_SYNC_ST_HIT_YNGR_LD 0xc4
+#define CPMU_SYNC_BR_ANY_MISP 0xcb
+#define CPMU_FED_IC_MISS_DEM 0xd3
+#define CPMU_FED_ITLB_MISS 0xd4
+
+#define KPC_CLASS_FIXED_MASK        (1 << 0)
+#define KPC_CLASS_CONFIGURABLE_MASK (1 << 1)
+#define KPC_CLASS_POWER_MASK        (1 << 2)
+#define KPC_CLASS_RAWPMU_MASK       (1 << 3)
+
+#define COUNTERS_COUNT 10
+#define CONFIG_COUNT 8
+#define KPC_MASK (KPC_CLASS_CONFIGURABLE_MASK | KPC_CLASS_FIXED_MASK)
+
+static int ff_kperf_was_init = 0;
+
+int ff_kperf_init()
+{
+    uint64_t config[COUNTERS_COUNT] = {0};
+    void *kperf = NULL;
+
+    if (ff_kperf_was_init)
+        return 0;
+
+    kperf = dlopen("/System/Library/PrivateFrameworks/kperf.framework/Versions/A/kperf", RTLD_LAZY);
+    if (!kperf) {
+        fprintf(stderr, "kperf: kperf = %p\n", kperf);
+        return -1;
+    }
+
+#define F(ret, name, ...)                            \
+    name = (name##proc *)(dlsym(kperf, #name));      \
+    if (!name) {                                     \
+        fprintf(stderr, "kperf: %s = %p\n", #name, (void *)name);    \
+        return -1;                                   \
+    }
+    KPERF_LIST
+#undef F
+
+    if (kpc_get_counter_count(KPC_MASK) != COUNTERS_COUNT) {
+        fprintf(stderr, "kperf: wrong fixed counters count\n");
+        return -1;
+    }
+
+    if (kpc_get_config_count(KPC_MASK) != CONFIG_COUNT) {
+        fprintf(stderr, "kperf: wrong fixed config count\n");
+        return -1;
+    }
+
+    config[0] = CPMU_CORE_CYCLE | CFGWORD_EL0A64EN_MASK;
+    // config[3] = CPMU_INST_BRANCH | CFGWORD_EL0A64EN_MASK;
+    // config[4] = CPMU_SYNC_BR_ANY_MISP | CFGWORD_EL0A64EN_MASK;
+    // config[5] = CPMU_INST_A64 | CFGWORD_EL0A64EN_MASK;
+
+    if (kpc_set_config(KPC_MASK, config)) {
+        fprintf(stderr, "kperf: kpc_set_config failed\n");
+        return -1;
+    }
+
+    if (kpc_force_all_ctrs_set(1)) {
+        fprintf(stderr, "kperf: kpc_force_all_ctrs_set failed\n");
+        return -1;
+    }
+
+    if (kpc_set_counting(KPC_MASK)) {
+        fprintf(stderr, "kperf: kpc_set_counting failed\n");
+        return -1;
+    }
+
+    if (kpc_set_thread_counting(KPC_MASK)) {
+        fprintf(stderr, "kperf: kpc_set_thread_counting failed\n");
+        return -1;
+    }
+
+    ff_kperf_was_init = 1;
+
+    return 0;
+}
+
+uint64_t ff_kperf_cycles()
+{
+    uint64_t counters[COUNTERS_COUNT];
+    if (kpc_get_thread_counters(0, COUNTERS_COUNT, counters)) {
+        return -1;
+    }
+
+    return counters[0];
+}