diff options
Diffstat (limited to 'erts/emulator/sys/unix/sys_time.c')
-rw-r--r-- | erts/emulator/sys/unix/sys_time.c | 751 |
1 files changed, 728 insertions, 23 deletions
diff --git a/erts/emulator/sys/unix/sys_time.c b/erts/emulator/sys/unix/sys_time.c index fcce54a2c4..d535457977 100644 --- a/erts/emulator/sys/unix/sys_time.c +++ b/erts/emulator/sys/unix/sys_time.c @@ -33,6 +33,21 @@ #include "sys.h" #include "global.h" +#include "erl_os_monotonic_time_extender.h" + +#undef ERTS_HAVE_ERTS_OS_TIMES_IMPL__ +#undef ERTS_HAVE_ERTS_SYS_HRTIME_IMPL__ + +#if defined(OS_MONOTONIC_TIME_USING_MACH_CLOCK_GET_TIME) \ + || defined(OS_SYSTEM_TIME_USING_MACH_CLOCK_GET_TIME) +# include <mach/clock.h> +# include <mach/mach.h> +# ifdef HAVE_CLOCK_GET_ATTRIBUTES +# define ERTS_HAVE_MACH_CLOCK_GETRES +static Sint64 +mach_clock_getres(clock_id_t clkid, char *clkid_str); +# endif +#endif #ifdef NO_SYSCONF # define TICKS_PER_SEC() HZ @@ -53,9 +68,23 @@ /******************* Routines for time measurement *********************/ -int erts_ticks_per_sec = 0; /* Will be SYS_CLK_TCK in erl_unix_sys.h */ -int erts_ticks_per_sec_wrap = 0; /* Will be SYS_CLK_TCK_WRAP */ -static int ticks_bsr = 0; /* Shift wrapped tick value this much to the right */ +#undef ERTS_SYS_TIME_INTERNAL_STATE_WRITE_FREQ__ +#undef ERTS_SYS_TIME_INTERNAL_STATE_READ_ONLY__ +#undef ERTS_SYS_TIME_INTERNAL_STATE_READ_MOSTLY__ + +#if defined(OS_MONOTONIC_TIME_USING_TIMES) + +static Uint32 +get_tick_count(void) +{ + struct tms unused; + return (Uint32) times(&unused); +} + +#define ERTS_SYS_TIME_INTERNAL_STATE_READ_ONLY__ +#define ERTS_SYS_TIME_INTERNAL_STATE_READ_MOSTLY__ + +#endif /* * init timers, chose a tick length, and return it. @@ -63,37 +92,713 @@ static int ticks_bsr = 0; /* Shift wrapped tick value this much to the right */ * does almost everything. Other platforms have to * emulate Unix in this sense. */ -int sys_init_time(void) + +ErtsSysTimeData__ erts_sys_time_data__ erts_align_attribute(ERTS_CACHE_LINE_SIZE); + +#if defined(__linux__) && defined(OS_MONOTONIC_TIME_USING_CLOCK_GETTIME) + +#define ERTS_SYS_TIME_INTERNAL_STATE_WRITE_FREQ__ + +static ErtsMonotonicTime clock_gettime_monotonic_raw(void); +static ErtsMonotonicTime clock_gettime_monotonic_verified(void); +#if defined(OS_SYSTEM_TIME_USING_CLOCK_GETTIME) +static void clock_gettime_times_raw(ErtsMonotonicTime *, ErtsSystemTime *); +static void clock_gettime_times_verified(ErtsMonotonicTime *, ErtsSystemTime *); +#endif + +#endif /* defined(__linux__) && defined(OS_MONOTONIC_TIME_USING_CLOCK_GETTIME) */ + +#ifdef ERTS_SYS_TIME_INTERNAL_STATE_READ_ONLY__ +struct sys_time_internal_state_read_only__ { +#if defined(OS_MONOTONIC_TIME_USING_TIMES) + int times_shift; +#endif +}; +#endif + +#ifdef ERTS_SYS_TIME_INTERNAL_STATE_READ_MOSTLY__ +struct sys_time_internal_state_read_mostly__ { +#if defined(OS_MONOTONIC_TIME_USING_TIMES) + ErtsOsMonotonicTimeExtendState os_mtime_xtnd; +#endif +}; +#endif + +#ifdef ERTS_SYS_TIME_INTERNAL_STATE_WRITE_FREQ__ +struct sys_time_internal_state_write_freq__ { + erts_smp_mtx_t mtx; +#if defined(__linux__) && defined(OS_MONOTONIC_TIME_USING_CLOCK_GETTIME) + ErtsMonotonicTime last_delivered; +#endif +}; +#endif + +#if defined(ERTS_SYS_TIME_INTERNAL_STATE_READ_ONLY__) \ + || defined(ERTS_SYS_TIME_INTERNAL_STATE_WRITE_FREQ__) +static struct { +#ifdef ERTS_SYS_TIME_INTERNAL_STATE_READ_ONLY__ + union { + struct sys_time_internal_state_read_only__ o; + char align__[(((sizeof(struct sys_time_internal_state_read_only__) - 1) + / ASSUMED_CACHE_LINE_SIZE) + 1) + * ASSUMED_CACHE_LINE_SIZE]; + } r; +#endif +#ifdef ERTS_SYS_TIME_INTERNAL_STATE_READ_MOSTLY__ + union { + struct sys_time_internal_state_read_mostly__ m; + char align__[(((sizeof(struct sys_time_internal_state_read_mostly__) - 1) + / ASSUMED_CACHE_LINE_SIZE) + 1) + * ASSUMED_CACHE_LINE_SIZE]; + } wr; +#endif +#ifdef ERTS_SYS_TIME_INTERNAL_STATE_WRITE_FREQ__ + union { + struct sys_time_internal_state_write_freq__ f; + char align__[(((sizeof(struct sys_time_internal_state_write_freq__) - 1) + / ASSUMED_CACHE_LINE_SIZE) + 1) + * ASSUMED_CACHE_LINE_SIZE]; + } w; +#endif +} internal_state erts_align_attribute(ERTS_CACHE_LINE_SIZE); +#endif + +void +sys_init_time(ErtsSysInitTimeResult *init_resp) { +#if !defined(ERTS_HAVE_OS_MONOTONIC_TIME_SUPPORT) + + init_resp->have_os_monotonic_time = 0; + +#else /* defined(ERTS_HAVE_OS_MONOTONIC_TIME_SUPPORT) */ + + int major, minor, build, vsn; + + init_resp->os_monotonic_time_info.resolution = (Uint64) 1000*1000*1000; +#if defined(HAVE_CLOCK_GETRES) && defined(MONOTONIC_CLOCK_ID) + { + struct timespec ts; + if (clock_getres(MONOTONIC_CLOCK_ID, &ts) == 0) { + if (ts.tv_sec == 0 && ts.tv_nsec != 0) + init_resp->os_monotonic_time_info.resolution /= ts.tv_nsec; + else if (ts.tv_sec >= 1) + init_resp->os_monotonic_time_info.resolution = 1; + } + } +#elif defined(ERTS_HAVE_MACH_CLOCK_GETRES) && defined(MONOTONIC_CLOCK_ID) + init_resp->os_monotonic_time_info.resolution + = mach_clock_getres(MONOTONIC_CLOCK_ID, MONOTONIC_CLOCK_ID_STR); +#endif + +#ifdef MONOTONIC_CLOCK_ID_STR + init_resp->os_monotonic_time_info.clock_id = MONOTONIC_CLOCK_ID_STR; +#else + init_resp->os_monotonic_time_info.clock_id = NULL; +#endif + + init_resp->os_monotonic_time_info.locked_use = 0; + +#if defined(OS_MONOTONIC_TIME_USING_CLOCK_GETTIME) + init_resp->os_monotonic_time_info.func = "clock_gettime"; +#elif defined(OS_MONOTONIC_TIME_USING_MACH_CLOCK_GET_TIME) + init_resp->os_monotonic_time_info.func = "clock_get_time"; +#elif defined(OS_MONOTONIC_TIME_USING_GETHRTIME) + init_resp->os_monotonic_time_info.func = "gethrtime"; +#elif defined(OS_MONOTONIC_TIME_USING_TIMES) + init_resp->os_monotonic_time_info.func = "times"; +#else +# error Unknown erts_os_monotonic_time() implementation +#endif + + init_resp->have_os_monotonic_time = 1; + + os_version(&major, &minor, &build); + + vsn = ERTS_MK_VSN_INT(major, minor, build); + + +#if defined(__linux__) && defined(OS_MONOTONIC_TIME_USING_CLOCK_GETTIME) + if (vsn >= ERTS_MK_VSN_INT(2, 6, 33)) { + erts_sys_time_data__.r.o.os_monotonic_time = + clock_gettime_monotonic_raw; +#if defined(OS_SYSTEM_TIME_USING_CLOCK_GETTIME) + erts_sys_time_data__.r.o.os_times = + clock_gettime_times_raw; +#endif + } + else { + /* + * Linux versions prior to 2.6.33 have a + * known bug that sometimes cause monotonic + * time to take small steps backwards. + */ + erts_sys_time_data__.r.o.os_monotonic_time = + clock_gettime_monotonic_verified; +#if defined(OS_SYSTEM_TIME_USING_CLOCK_GETTIME) + erts_sys_time_data__.r.o.os_times = + clock_gettime_times_verified; +#endif + erts_smp_mtx_init(&internal_state.w.f.mtx, + "os_monotonic_time"); + internal_state.w.f.last_delivered + = clock_gettime_monotonic_raw(); + init_resp->os_monotonic_time_info.locked_use = 1; + } +#else /* !(defined(__linux__) && defined(OS_MONOTONIC_TIME_USING_CLOCK_GETTIME)) */ + { + char flavor[1024]; + + os_flavor(flavor, sizeof(flavor)); + + if (sys_strcmp(flavor, "sunos") == 0) { + /* + * Don't trust hrtime on multi processors + * on SunOS prior to SunOS 5.8 + */ + if (vsn < ERTS_MK_VSN_INT(5, 8, 0)) { +#if defined(HAVE_SYSCONF) && defined(_SC_NPROCESSORS_CONF) + if (sysconf(_SC_NPROCESSORS_CONF) > 1) +#endif + init_resp->have_os_monotonic_time = 0; + } + } + } +#endif /* !(defined(__linux__) && defined(OS_MONOTONIC_TIME_USING_CLOCK_GETTIME)) */ + +#endif /* defined(ERTS_HAVE_OS_MONOTONIC_TIME_SUPPORT) */ + +#ifdef ERTS_COMPILE_TIME_MONOTONIC_TIME_UNIT + init_resp->os_monotonic_time_unit = ERTS_COMPILE_TIME_MONOTONIC_TIME_UNIT; +#endif + init_resp->sys_clock_resolution = SYS_CLOCK_RESOLUTION; + /* - * This (erts_ticks_per_sec) is only for times() (CLK_TCK), - * the resolution is always one millisecond.. + * This (erts_sys_time_data__.r.o.ticks_per_sec) is only for + * times() (CLK_TCK), the resolution is always one millisecond.. */ - if ((erts_ticks_per_sec = TICKS_PER_SEC()) < 0) - erl_exit(1, "Can't get clock ticks/sec\n"); - if (erts_ticks_per_sec >= 1000) { - /* Workaround for beta linux kernels, need to be done in runtime - to make erlang run on both 2.4 and 2.5 kernels. In the future, - the kernel ticks might as - well be used as a high res timer instead, but that's for when the - majority uses kernels with HZ == 1024 */ - ticks_bsr = 3; - } else { - ticks_bsr = 0; + if ((erts_sys_time_data__.r.o.ticks_per_sec = TICKS_PER_SEC()) < 0) + erl_exit(ERTS_ABORT_EXIT, "Can't get clock ticks/sec\n"); + +#if defined(OS_MONOTONIC_TIME_USING_TIMES) +#if ERTS_COMPILE_TIME_MONOTONIC_TIME_UNIT +# error Time unit is supposed to be determined at runtime... +#endif + { + ErtsMonotonicTime resolution = erts_sys_time_data__.r.o.ticks_per_sec; + ErtsMonotonicTime time_unit = resolution; + int shift = 0; + + while (time_unit < 1000*1000) { + time_unit <<= 1; + shift++; + } + + init_resp->os_monotonic_time_info.resolution = resolution; + init_resp->os_monotonic_time_unit = time_unit; + init_resp->os_monotonic_time_info.extended = 1; + internal_state.r.o.times_shift = shift; + + erts_init_os_monotonic_time_extender(&internal_state.wr.m.os_mtime_xtnd, + get_tick_count, + (1 << 29) / resolution); } - erts_ticks_per_sec_wrap = (erts_ticks_per_sec >> ticks_bsr); - return SYS_CLOCK_RESOLUTION; +#endif /* defined(OS_MONOTONIC_TIME_USING_TIMES) */ + +#ifdef WALL_CLOCK_ID_STR + init_resp->os_system_time_info.clock_id = WALL_CLOCK_ID_STR; +#else + init_resp->os_system_time_info.clock_id = NULL; +#endif + + init_resp->os_system_time_info.locked_use = 0; + init_resp->os_system_time_info.resolution = (Uint64) 1000*1000*1000; +#if defined(HAVE_CLOCK_GETRES) && defined(WALL_CLOCK_ID) + { + struct timespec ts; + if (clock_getres(WALL_CLOCK_ID, &ts) == 0) { + if (ts.tv_sec == 0 && ts.tv_nsec != 0) + init_resp->os_system_time_info.resolution /= ts.tv_nsec; + else if (ts.tv_sec >= 1) + init_resp->os_system_time_info.resolution = 1; + } + } +#elif defined(ERTS_HAVE_MACH_CLOCK_GETRES) && defined(WALL_CLOCK_ID) + init_resp->os_system_time_info.resolution + = mach_clock_getres(WALL_CLOCK_ID, WALL_CLOCK_ID_STR); +#endif + +#if defined(OS_SYSTEM_TIME_USING_CLOCK_GETTIME) + init_resp->os_system_time_info.func = "clock_gettime"; +#elif defined(OS_SYSTEM_TIME_USING_MACH_CLOCK_GET_TIME) + init_resp->os_system_time_info.func = "clock_get_time"; +#elif defined(OS_SYSTEM_TIME_GETTIMEOFDAY) + init_resp->os_system_time_info.func = "gettimeofday"; + init_resp->os_system_time_info.resolution = 1000*1000; + init_resp->os_system_time_info.clock_id = NULL; +#else +# error Missing erts_os_system_time() implementation +#endif + +} + +void +erts_late_sys_init_time(void) +{ +#if defined(OS_MONOTONIC_TIME_USING_TIMES) + erts_late_init_os_monotonic_time_extender(&internal_state.wr.m.os_mtime_xtnd); +#endif } -clock_t sys_times_wrap(void) +static ERTS_INLINE ErtsSystemTime +adj_stime_time_unit(ErtsSystemTime stime, Uint32 res) { - SysTimes dummy; - clock_t result = (sys_times(&dummy) >> ticks_bsr); - return result; + if (res == ERTS_COMPILE_TIME_MONOTONIC_TIME_UNIT) + return stime; + if (res == (Uint32) 1000*1000*1000 + && ERTS_COMPILE_TIME_MONOTONIC_TIME_UNIT == 1000*1000) + return stime/1000; + if (res == (Uint32) 1000*1000 + && ERTS_COMPILE_TIME_MONOTONIC_TIME_UNIT == 1000*1000*1000) + return stime*1000; + return ((ErtsSystemTime) + erts_time_unit_conversion(stime, + (Uint32) res, + (Uint32) ERTS_MONOTONIC_TIME_UNIT)); } +/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *\ + * POSIX clock_gettime() * +\* */ +#if defined(OS_MONOTONIC_TIME_USING_CLOCK_GETTIME) \ + || defined(OS_SYSTEM_TIME_USING_CLOCK_GETTIME) + +static ERTS_INLINE ErtsMonotonicTime +timespec2montime(struct timespec *ts) +{ + ErtsMonotonicTime time; + time = (ErtsMonotonicTime) ts->tv_sec; + time *= (ErtsMonotonicTime) 1000*1000*1000; + time += (ErtsMonotonicTime) ts->tv_nsec; + return time; +} + +static ERTS_INLINE ErtsMonotonicTime +posix_clock_gettime(clockid_t id, char *name) +{ + struct timespec ts; + + if (clock_gettime(id, &ts) != 0) { + int err = errno; + char *errstr = err ? strerror(err) : "unknown"; + erl_exit(ERTS_ABORT_EXIT, + "clock_gettime(%s, _) failed: %s (%d)\n", + name, errstr, err); + } + return timespec2montime(&ts); +} + +#endif /* defined(OS_MONOTONIC_TIME_USING_CLOCK_GETTIME) \ + || defined(OS_SYSTEM_TIME_USING_CLOCK_GETTIME) */ + +#if defined(OS_SYSTEM_TIME_USING_CLOCK_GETTIME) + +ErtsSystemTime +erts_os_system_time(void) +{ + ErtsSystemTime stime; + + stime = (ErtsSystemTime) posix_clock_gettime(WALL_CLOCK_ID, + WALL_CLOCK_ID_STR); + return adj_stime_time_unit(stime, (Uint32) 1000*1000*1000); +} + +#endif /* defined(OS_SYSTEM_TIME_USING_CLOCK_GETTIME) */ + +#if defined(OS_MONOTONIC_TIME_USING_CLOCK_GETTIME) + +#if defined(OS_SYSTEM_TIME_USING_CLOCK_GETTIME) + +#define ERTS_HAVE_ERTS_OS_TIMES_IMPL__ + +static ERTS_INLINE void +posix_clock_gettime_times(ErtsMonotonicTime *mtimep, + ErtsSystemTime *stimep) +{ + struct timespec mts, sts; + int mres, sres, merr, serr; + + mres = clock_gettime(MONOTONIC_CLOCK_ID, &mts); + merr = errno; + sres = clock_gettime(WALL_CLOCK_ID, &sts); + serr = errno; + + if (mres != 0) { + char *errstr = merr ? strerror(merr) : "unknown"; + erl_exit(ERTS_ABORT_EXIT, + "clock_gettime(%s, _) failed: %s (%d)\n", + MONOTONIC_CLOCK_ID_STR, errstr, merr); + } + if (sres != 0) { + char *errstr = serr ? strerror(serr) : "unknown"; + erl_exit(ERTS_ABORT_EXIT, + "clock_gettime(%s, _) failed: %s (%d)\n", + WALL_CLOCK_ID_STR, errstr, serr); + } + + *mtimep = timespec2montime(&mts); + *stimep = (ErtsSystemTime) timespec2montime(&sts); +} + +#endif /* defined(OS_SYSTEM_TIME_USING_CLOCK_GETTIME) */ + +#if defined(__linux__) + +static ErtsMonotonicTime clock_gettime_monotonic_verified(void) +{ + ErtsMonotonicTime mtime = posix_clock_gettime(MONOTONIC_CLOCK_ID, + MONOTONIC_CLOCK_ID_STR); + + erts_smp_mtx_lock(&internal_state.w.f.mtx); + if (mtime < internal_state.w.f.last_delivered) + mtime = internal_state.w.f.last_delivered; + else + internal_state.w.f.last_delivered = mtime; + erts_smp_mtx_unlock(&internal_state.w.f.mtx); + + return mtime; +} + +#if defined(OS_SYSTEM_TIME_USING_CLOCK_GETTIME) + +static void clock_gettime_times_verified(ErtsMonotonicTime *mtimep, + ErtsSystemTime *stimep) +{ + posix_clock_gettime_times(mtimep, stimep); + + erts_smp_mtx_lock(&internal_state.w.f.mtx); + if (*mtimep < internal_state.w.f.last_delivered) + *mtimep = internal_state.w.f.last_delivered; + else + internal_state.w.f.last_delivered = *mtimep; + erts_smp_mtx_unlock(&internal_state.w.f.mtx); +} + +#endif /* defined(OS_SYSTEM_TIME_USING_CLOCK_GETTIME) */ + +static ErtsMonotonicTime clock_gettime_monotonic_raw(void) +{ + return posix_clock_gettime(MONOTONIC_CLOCK_ID, + MONOTONIC_CLOCK_ID_STR); +} + +#if defined(OS_SYSTEM_TIME_USING_CLOCK_GETTIME) + +static void clock_gettime_times_raw(ErtsMonotonicTime *mtimep, + ErtsSystemTime *stimep) +{ + posix_clock_gettime_times(mtimep, stimep); +} + +#endif /* defined(OS_SYSTEM_TIME_USING_CLOCK_GETTIME) */ + +#else /* !defined(__linux__) */ + +ErtsMonotonicTime erts_os_monotonic_time(void) +{ + return posix_clock_gettime(MONOTONIC_CLOCK_ID, + MONOTONIC_CLOCK_ID_STR); +} + +#if defined(OS_SYSTEM_TIME_USING_CLOCK_GETTIME) + +void erts_os_times(ErtsMonotonicTime *mtimep, ErtsSystemTime *stimep) +{ + posix_clock_gettime_times(mtimep, stimep); +} + +#endif /* defined(OS_SYSTEM_TIME_USING_CLOCK_GETTIME) */ + +#endif /* !defined(__linux__) */ + +#define ERTS_HAVE_ERTS_SYS_HRTIME_IMPL__ + +ErtsSysHrTime +erts_sys_hrtime(void) +{ + return (ErtsSysHrTime) posix_clock_gettime(MONOTONIC_CLOCK_ID, + MONOTONIC_CLOCK_ID_STR); +} + +#endif /* defined(OS_MONOTONIC_TIME_USING_CLOCK_GETTIME) */ + +/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *\ + * MACH clock_get_time() * +\* */ + +#if defined(OS_MONOTONIC_TIME_USING_MACH_CLOCK_GET_TIME) \ + || defined(OS_SYSTEM_TIME_USING_MACH_CLOCK_GET_TIME) + +#ifdef ERTS_HAVE_MACH_CLOCK_GETRES + +static Sint64 +mach_clock_getres(clock_id_t clkid, char *clkid_str) +{ + mach_port_t task; + host_name_port_t host; + natural_t attr[1]; + kern_return_t kret; + clock_serv_t clk_srv; + mach_msg_type_number_t cnt; + + host = mach_host_self(); + kret = host_get_clock_service(host, clkid, &clk_srv); + if (kret != KERN_SUCCESS) { + erl_exit(ERTS_ABORT_EXIT, + "host_get_clock_service(_, %s, _) failed\n", + clkid_str); + } + + cnt = sizeof(attr); + kret = clock_get_attributes(clk_srv, CLOCK_GET_TIME_RES, (clock_attr_t) attr, &cnt); + if (kret != KERN_SUCCESS) { + erl_exit(ERTS_ABORT_EXIT, + "clock_get_attributes(%s, _) failed\n", + clkid_str); + } + task = mach_task_self(); + mach_port_deallocate(task, host); + mach_port_deallocate(task, clk_srv); + + return (Sint64) attr[0]; +} + +#endif /* ERTS_HAVE_MACH_CLOCK_GETRES */ + +static ERTS_INLINE Sint64 +mach_clock_gettime(clock_id_t clkid, char *clkid_str) +{ + Sint64 time; + mach_port_t task; + host_name_port_t host; + kern_return_t kret; + clock_serv_t clk_srv; + mach_timespec_t time_spec; + + host = mach_host_self(); + kret = host_get_clock_service(host, clkid, &clk_srv); + if (kret != KERN_SUCCESS) { + erl_exit(ERTS_ABORT_EXIT, + "host_get_clock_service(_, %s, _) failed\n", + clkid_str); + } + errno = 0; + kret = clock_get_time(clk_srv, &time_spec); + if (kret != KERN_SUCCESS) { + erl_exit(ERTS_ABORT_EXIT, + "clock_get_time(%s, _) failed\n", + clkid_str); + } + task = mach_task_self(); + mach_port_deallocate(task, host); + mach_port_deallocate(task, clk_srv); + + time = (Sint64) time_spec.tv_sec; + time *= (Sint64) 1000*1000*1000; + time += (Sint64) time_spec.tv_nsec; + return time; +} + +#endif /* defined(OS_MONOTONIC_TIME_USING_MACH_CLOCK_GET_TIME) \ + || defined(OS_SYSTEM_TIME_USING_MACH_CLOCK_GET_TIME) */ + +#if defined(OS_SYSTEM_TIME_USING_MACH_CLOCK_GET_TIME) + +#define ERTS_HAVE_ERTS_OS_TIMES_IMPL__ + +ErtsSystemTime +erts_os_system_time(void) +{ + ErtsSystemTime stime; + stime = (ErtsSystemTime) mach_clock_gettime(WALL_CLOCK_ID, + WALL_CLOCK_ID_STR); + return adj_stime_time_unit(stime, (Uint32) 1000*1000*1000); +} + +#endif /* defined(OS_SYSTEM_TIME_USING_MACH_CLOCK_GET_TIME) */ + +#if defined(OS_MONOTONIC_TIME_USING_MACH_CLOCK_GET_TIME) + +ErtsMonotonicTime +erts_os_monotonic_time(void) +{ + return (ErtsMonotonicTime) mach_clock_gettime(MONOTONIC_CLOCK_ID, + MONOTONIC_CLOCK_ID_STR); +} + +#define ERTS_HAVE_ERTS_SYS_HRTIME_IMPL__ + +ErtsSysHrTime +erts_sys_hrtime(void) +{ + return (ErtsMonotonicTime) mach_clock_gettime(MONOTONIC_CLOCK_ID, + MONOTONIC_CLOCK_ID_STR); +} + +#if defined(OS_SYSTEM_TIME_USING_MACH_CLOCK_GET_TIME) + +#define ERTS_HAVE_ERTS_OS_TIMES_IMPL__ + +void +erts_os_times(ErtsMonotonicTime *mtimep, ErtsSystemTime *stimep) +{ + ErtsMonotonicTime mtime; + ErtsSystemTime stime; + mach_port_t task; + host_name_port_t host; + kern_return_t mkret, skret; + clock_serv_t mclk_srv, sclk_srv; + mach_timespec_t mon_time_spec, sys_time_spec; + + host = mach_host_self(); + mkret = host_get_clock_service(host, MONOTONIC_CLOCK_ID, &mclk_srv); + skret = host_get_clock_service(host, WALL_CLOCK_ID, &sclk_srv); + if (mkret != KERN_SUCCESS) { + erl_exit(ERTS_ABORT_EXIT, + "host_get_clock_service(_, %s, _) failed\n", + MONOTONIC_CLOCK_ID); + } + if (skret != KERN_SUCCESS) { + erl_exit(ERTS_ABORT_EXIT, + "host_get_clock_service(_, %s, _) failed\n", + WALL_CLOCK_ID); + } + mkret = clock_get_time(mclk_srv, &mon_time_spec); + skret = clock_get_time(sclk_srv, &sys_time_spec); + if (mkret != KERN_SUCCESS) { + erl_exit(ERTS_ABORT_EXIT, + "clock_get_time(%s, _) failed\n", + MONOTONIC_CLOCK_ID); + } + if (skret != KERN_SUCCESS) { + erl_exit(ERTS_ABORT_EXIT, + "clock_get_time(%s, _) failed\n", + WALL_CLOCK_ID); + } + task = mach_task_self(); + mach_port_deallocate(task, host); + mach_port_deallocate(task, mclk_srv); + mach_port_deallocate(task, sclk_srv); + + mtime = (ErtsMonotonicTime) mon_time_spec.tv_sec; + mtime *= (ErtsMonotonicTime) 1000*1000*1000; + mtime += (ErtsMonotonicTime) mon_time_spec.tv_nsec; + stime = (ErtsSystemTime) sys_time_spec.tv_sec; + stime *= (ErtsSystemTime) 1000*1000*1000; + stime += (ErtsSystemTime) sys_time_spec.tv_nsec; + *mtimep = mtime; + *stimep = stime; +} + +#endif /* defined(OS_SYSTEM_TIME_USING_MACH_CLOCK_GET_TIME) */ + +#endif /* defined(OS_MONOTONIC_TIME_USING_MACH_CLOCK_GET_TIME) */ + +/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *\ + * Solaris gethrtime() - OS monotonic time * +\* */ + +#if defined(OS_MONOTONIC_TIME_USING_GETHRTIME) + +ErtsMonotonicTime erts_os_monotonic_time(void) +{ + return (ErtsMonotonicTime) gethrtime(); +} + +#define ERTS_HAVE_ERTS_SYS_HRTIME_IMPL__ + +ErtsSysHrTime +erts_sys_hrtime(void) +{ + return (ErtsSysHrTime) gethrtime(); +} + +#endif /* defined(OS_MONOTONIC_TIME_USING_GETHRTIME) */ + +/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *\ + * gettimeofday() - OS system time * +\* */ + +#if defined(OS_SYSTEM_TIME_GETTIMEOFDAY) + +ErtsSystemTime +erts_os_system_time(void) +{ + ErtsSystemTime stime; + struct timeval tv; + + if (gettimeofday(&tv, NULL) != 0) { + int err = errno; + char *errstr = err ? strerror(err) : "unknown"; + erl_exit(ERTS_ABORT_EXIT, + "gettimeofday(_, NULL) failed: %s (%d)\n", + errstr, err); + } + + stime = (ErtsSystemTime) tv.tv_sec; + stime *= (ErtsSystemTime) 1000*1000; + stime += (ErtsSystemTime) tv.tv_usec; + + return adj_stime_time_unit(stime, (Uint32) 1000*1000); +} + +#endif /* defined(OS_SYSTEM_TIME_GETTIMEOFDAY) */ + +/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *\ + * times() - OS monotonic time * +\* */ + +#if defined(OS_MONOTONIC_TIME_USING_TIMES) + +ErtsMonotonicTime +erts_os_monotonic_time(void) +{ + Uint32 ticks = get_tick_count(); + ERTS_CHK_EXTEND_OS_MONOTONIC_TIME(&internal_state.wr.m.os_mtime_xtnd, + ticks); + return ERTS_EXTEND_OS_MONOTONIC_TIME(&internal_state.wr.m.os_mtime_xtnd, + ticks) << internal_state.r.o.times_shift; +} + +#endif + +/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *\ + * Fallbacks * +\* */ + +#ifndef ERTS_HAVE_ERTS_SYS_HRTIME_IMPL__ + +ErtsSysHrTime +erts_sys_hrtime(void) +{ + return (ErtsSysHrTime) ERTS_MONOTONIC_TO_NSEC(erts_os_system_time()); +} + +#endif + +#if !defined(ERTS_HAVE_ERTS_OS_TIMES_IMPL__) \ + && defined(ERTS_HAVE_OS_MONOTONIC_TIME_SUPPORT) + +void +erts_os_times(ErtsMonotonicTime *mtimep, ErtsSystemTime *stimep) +{ + *mtimep = erts_os_monotonic_time(); + *stimep = erts_os_system_time(); +} + +#endif +/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ #ifdef HAVE_GETHRVTIME_PROCFS_IOCTL |