[FFmpeg-devel] [PATCH] checkasm: add (private) kperf timing for macOS
Josh Dekker
josh at itanimul.li
Tue Apr 13 03:45:23 EEST 2021
Signed-off-by: Josh Dekker <josh at itanimul.li>
---
configure | 2 +
tests/checkasm/Makefile | 1 +
tests/checkasm/checkasm.c | 19 ++++-
tests/checkasm/checkasm.h | 10 ++-
tests/checkasm/macos_kperf.c | 143 +++++++++++++++++++++++++++++++++++
tests/checkasm/macos_kperf.h | 23 ++++++
6 files changed, 195 insertions(+), 3 deletions(-)
create mode 100644 tests/checkasm/macos_kperf.c
create mode 100644 tests/checkasm/macos_kperf.h
diff --git a/configure b/configure
index d7a3f507e8..a47e3dea67 100755
--- a/configure
+++ b/configure
@@ -490,6 +490,7 @@ Developer options (useful when working on FFmpeg itself):
--ignore-tests=TESTS comma-separated list (without "fate-" prefix
in the name) of tests whose result is ignored
--enable-linux-perf enable Linux Performance Monitor API
+ --enable-macos-kperf enable macOS kperf (private) API
--disable-large-tests disable tests that use a large amount of memory
NOTE: Object files are built at the place where configure is launched.
@@ -1949,6 +1950,7 @@ CONFIG_LIST="
fontconfig
large_tests
linux_perf
+ macos_kperf
memory_poisoning
neon_clobber_test
ossfuzz
diff --git a/tests/checkasm/Makefile b/tests/checkasm/Makefile
index 1827a4e134..4abaef9c63 100644
--- a/tests/checkasm/Makefile
+++ b/tests/checkasm/Makefile
@@ -58,6 +58,7 @@ CHECKASMOBJS-$(CONFIG_AVUTIL) += $(AVUTILOBJS)
CHECKASMOBJS-$(ARCH_AARCH64) += aarch64/checkasm.o
CHECKASMOBJS-$(HAVE_ARMV5TE_EXTERNAL) += arm/checkasm.o
CHECKASMOBJS-$(HAVE_X86ASM) += x86/checkasm.o
+CHECKASMOBJS-$(CONFIG_MACOS_KPERF) += macos_kperf.o
CHECKASMOBJS += $(CHECKASMOBJS-yes) checkasm.o
CHECKASMOBJS := $(sort $(CHECKASMOBJS:%=tests/checkasm/%))
diff --git a/tests/checkasm/checkasm.c b/tests/checkasm/checkasm.c
index 8338e8ff58..4c42040244 100644
--- a/tests/checkasm/checkasm.c
+++ b/tests/checkasm/checkasm.c
@@ -26,6 +26,8 @@
# ifndef _GNU_SOURCE
# define _GNU_SOURCE // for syscall (performance monitoring API)
# endif
+#elif CONFIG_MACOS_KPERF
+#include "macos_kperf.h"
#endif
#include <stdarg.h>
@@ -637,9 +639,20 @@ static int bench_init_linux(void)
}
return 0;
}
-#endif
+#elif CONFIG_MACOS_KPERF
+static int bench_init_kperf(void)
+{
+ if (ff_kperf_init() || ff_kperf_setup())
+ return -1;
-#if !CONFIG_LINUX_PERF
+ if (ff_kperf_cycles(NULL)) {
+ fprintf(stderr, "checkasm must be run as root to use kperf on macOS\n");
+ return -1;
+ }
+
+ return 0;
+}
+#else
static int bench_init_ffmpeg(void)
{
#ifdef AV_READ_TIME
@@ -656,6 +669,8 @@ static int bench_init(void)
{
#if CONFIG_LINUX_PERF
int ret = bench_init_linux();
+#elif CONFIG_MACOS_KPERF
+ int ret = bench_init_kperf();
#else
int ret = bench_init_ffmpeg();
#endif
diff --git a/tests/checkasm/checkasm.h b/tests/checkasm/checkasm.h
index ef6645e3a2..4127081d74 100644
--- a/tests/checkasm/checkasm.h
+++ b/tests/checkasm/checkasm.h
@@ -31,6 +31,8 @@
#include <sys/ioctl.h>
#include <asm/unistd.h>
#include <linux/perf_event.h>
+#elif CONFIG_MACOS_KPERF
+#include "macos_kperf.h"
#endif
#include "libavutil/avstring.h"
@@ -224,7 +226,7 @@ typedef struct CheckasmPerf {
int iterations;
} CheckasmPerf;
-#if defined(AV_READ_TIME) || CONFIG_LINUX_PERF
+#if defined(AV_READ_TIME) || CONFIG_LINUX_PERF || CONFIG_MACOS_KPERF
#if CONFIG_LINUX_PERF
#define PERF_START(t) do { \
@@ -235,6 +237,12 @@ typedef struct CheckasmPerf {
ioctl(sysfd, PERF_EVENT_IOC_DISABLE, 0); \
read(sysfd, &t, sizeof(t)); \
} while (0)
+#elif CONFIG_MACOS_KPERF
+#define PERF_START(t) do { \
+ t = 0; \
+ ff_kperf_cycles(&t); \
+} while (0)
+#define PERF_STOP(t) ff_kperf_cycles(&t)
#else
#define PERF_START(t) t = AV_READ_TIME()
#define PERF_STOP(t) t = AV_READ_TIME() - t
diff --git a/tests/checkasm/macos_kperf.c b/tests/checkasm/macos_kperf.c
new file mode 100644
index 0000000000..e6ae316608
--- /dev/null
+++ b/tests/checkasm/macos_kperf.c
@@ -0,0 +1,143 @@
+/*
+ * 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)
+
+int ff_kperf_setup()
+{
+ uint64_t config[COUNTERS_COUNT] = {0};
+ 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;
+ }
+
+ return 0;
+}
+
+int ff_kperf_init()
+{
+ void *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;
+ }
+
+ return 0;
+}
+
+int ff_kperf_cycles(uint64_t *cycles)
+{
+ uint64_t counters[COUNTERS_COUNT];
+ if (kpc_get_thread_counters(0, COUNTERS_COUNT, counters)) {
+ return -1;
+ }
+
+ if (cycles)
+ *cycles = counters[0] - *cycles;
+
+ return 0;
+}
diff --git a/tests/checkasm/macos_kperf.h b/tests/checkasm/macos_kperf.h
new file mode 100644
index 0000000000..dddd6e4d24
--- /dev/null
+++ b/tests/checkasm/macos_kperf.h
@@ -0,0 +1,23 @@
+/*
+ * 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 <stdint.h>
+
+int ff_kperf_setup(void);
+int ff_kperf_init(void);
+int ff_kperf_cycles(uint64_t *cycles);
--
2.24.3 (Apple Git-128)
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