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-rw-r--r--erts/emulator/beam/erl_bif_info.c5
-rw-r--r--erts/emulator/beam/erl_lock_check.c2
-rw-r--r--erts/emulator/beam/erl_time.h7
-rw-r--r--erts/emulator/beam/erl_time_sup.c147
-rw-r--r--erts/emulator/beam/sys.h4
-rw-r--r--erts/emulator/sys/unix/erl_unix_sys.h4
-rw-r--r--erts/emulator/test/statistics_SUITE.erl34
7 files changed, 149 insertions, 54 deletions
diff --git a/erts/emulator/beam/erl_bif_info.c b/erts/emulator/beam/erl_bif_info.c
index d0942ccef8..93f5f9ec11 100644
--- a/erts/emulator/beam/erl_bif_info.c
+++ b/erts/emulator/beam/erl_bif_info.c
@@ -48,6 +48,7 @@
#include "erl_map.h"
#define ERTS_PTAB_WANT_DEBUG_FUNCS__
#include "erl_ptab.h"
+#include "erl_time.h"
#ifdef HIPE
#include "hipe_arch.h"
#endif
@@ -3467,7 +3468,7 @@ BIF_RETTYPE statistics_1(BIF_ALIST_1)
ErtsMonotonicTime u1, u2;
Eterm b1, b2;
Uint hsz;
- elapsed_time_both(&u1, NULL, &u2, NULL);
+ erts_runtime_elapsed_both(&u1, NULL, &u2, NULL);
hsz = 3; /* 2-tuple */
(void) erts_bld_monotonic_time(NULL, &hsz, u1);
(void) erts_bld_monotonic_time(NULL, &hsz, u2);
@@ -3483,7 +3484,7 @@ BIF_RETTYPE statistics_1(BIF_ALIST_1)
ErtsMonotonicTime w1, w2;
Eterm b1, b2;
Uint hsz;
- wall_clock_elapsed_time_both(&w1, &w2);
+ erts_wall_clock_elapsed_both(&w1, &w2);
hsz = 3; /* 2-tuple */
(void) erts_bld_monotonic_time(NULL, &hsz, w1);
(void) erts_bld_monotonic_time(NULL, &hsz, w2);
diff --git a/erts/emulator/beam/erl_lock_check.c b/erts/emulator/beam/erl_lock_check.c
index b68b48874d..47c0fd2869 100644
--- a/erts/emulator/beam/erl_lock_check.c
+++ b/erts/emulator/beam/erl_lock_check.c
@@ -160,9 +160,9 @@ static erts_lc_lock_order_t erts_lock_order[] = {
{ "xports_list_pre_alloc_lock", "address" },
{ "inet_buffer_stack_lock", NULL },
{ "system_block", NULL },
- { "timeofday", NULL },
{ "get_time", NULL },
{ "get_corrected_time", NULL },
+ { "runtime", NULL },
{ "breakpoints", NULL },
{ "pix_lock", "address" },
{ "run_queues_lists", NULL },
diff --git a/erts/emulator/beam/erl_time.h b/erts/emulator/beam/erl_time.h
index ccc5526664..27164d50a0 100644
--- a/erts/emulator/beam/erl_time.h
+++ b/erts/emulator/beam/erl_time.h
@@ -130,6 +130,13 @@ Eterm erts_get_monotonic_end_time(struct process *c_p);
Eterm erts_monotonic_time_source(struct process*c_p);
Eterm erts_system_time_source(struct process*c_p);
+void erts_runtime_elapsed_both(ErtsMonotonicTime *ms_user,
+ ErtsMonotonicTime *ms_sys,
+ ErtsMonotonicTime *ms_user_diff,
+ ErtsMonotonicTime *ms_sys_diff);
+void erts_wall_clock_elapsed_both(ErtsMonotonicTime *total,
+ ErtsMonotonicTime *diff);
+
#ifdef SYS_CLOCK_RESOLUTION
#define ERTS_CLKTCK_RESOLUTION ((ErtsMonotonicTime) (SYS_CLOCK_RESOLUTION*1000))
#else
diff --git a/erts/emulator/beam/erl_time_sup.c b/erts/emulator/beam/erl_time_sup.c
index c06b464458..f2e0900fec 100644
--- a/erts/emulator/beam/erl_time_sup.c
+++ b/erts/emulator/beam/erl_time_sup.c
@@ -36,12 +36,29 @@
#include "erl_driver.h"
#include "erl_nif.h"
-static erts_mtx_t erts_timeofday_mtx;
static erts_mtx_t erts_get_time_mtx;
-static SysTimes t_start; /* Used in elapsed_time_both */
-static ErtsMonotonicTime prev_wall_clock_elapsed; /* Used in wall_clock_elapsed_time_both */
-static ErtsMonotonicTime previous_now; /* Used in get_now */
+ /* used by erts_runtime_elapsed_both */
+typedef struct {
+ erts_mtx_t mtx;
+ ErtsMonotonicTime user;
+ ErtsMonotonicTime sys;
+} ErtsRunTimePrevData;
+
+static union {
+ ErtsRunTimePrevData data;
+ char align__[ERTS_ALC_CACHE_LINE_ALIGN_SIZE(sizeof(ErtsRunTimePrevData))];
+} runtime_prev erts_align_attribute(ERTS_CACHE_LINE_SIZE);
+
+static union {
+ erts_atomic64_t time;
+ char align__[ERTS_ALC_CACHE_LINE_ALIGN_SIZE(sizeof(erts_atomic64_t))];
+} wall_clock_prev erts_align_attribute(ERTS_CACHE_LINE_SIZE);
+
+static union {
+ erts_atomic64_t time;
+ char align__[ERTS_ALC_CACHE_LINE_ALIGN_SIZE(sizeof(erts_atomic64_t))];
+} now_prev erts_align_attribute(ERTS_CACHE_LINE_SIZE);
static ErtsMonitor *time_offset_monitors = NULL;
static Uint no_time_offset_monitors = 0;
@@ -954,10 +971,12 @@ erts_init_time_sup(int time_correction, ErtsTimeWarpMode time_warp_mode)
ASSERT(ERTS_MONOTONIC_TIME_MIN < ERTS_MONOTONIC_TIME_MAX);
- erts_mtx_init(&erts_timeofday_mtx, "timeofday", NIL,
- ERTS_LOCK_FLAGS_PROPERTY_STATIC | ERTS_LOCK_FLAGS_CATEGORY_GENERIC);
erts_mtx_init(&erts_get_time_mtx, "get_time", NIL,
ERTS_LOCK_FLAGS_PROPERTY_STATIC | ERTS_LOCK_FLAGS_CATEGORY_GENERIC);
+ erts_mtx_init(&runtime_prev.data.mtx, "runtime", NIL,
+ ERTS_LOCK_FLAGS_PROPERTY_STATIC | ERTS_LOCK_FLAGS_CATEGORY_GENERIC);
+ runtime_prev.data.user = 0;
+ runtime_prev.data.sys = 0;
time_sup.r.o.correction = time_correction;
time_sup.r.o.warp_mode = time_warp_mode;
@@ -1157,9 +1176,13 @@ erts_init_time_sup(int time_correction, ErtsTimeWarpMode time_warp_mode)
time_sup.f.c.last_not_corrected_time = 0;
}
- prev_wall_clock_elapsed = 0;
+ erts_atomic64_init_nob(&wall_clock_prev.time,
+ (erts_aint64_t) 0);
+
+ erts_atomic64_init_nob(
+ &now_prev.time,
+ (erts_aint64_t) ERTS_MONOTONIC_TO_USEC(get_time_offset()));
- previous_now = ERTS_MONOTONIC_TO_USEC(get_time_offset());
#ifdef DEBUG
time_sup_initialized = 1;
@@ -1289,36 +1312,65 @@ erts_finalize_time_offset(void)
/* info functions */
void
-elapsed_time_both(ErtsMonotonicTime *ms_user, ErtsMonotonicTime *ms_sys,
- ErtsMonotonicTime *ms_user_diff, ErtsMonotonicTime *ms_sys_diff)
+erts_runtime_elapsed_both(ErtsMonotonicTime *ms_user, ErtsMonotonicTime *ms_sys,
+ ErtsMonotonicTime *ms_user_diff, ErtsMonotonicTime *ms_sys_diff)
{
- ErtsMonotonicTime prev_total_user, prev_total_sys;
- ErtsMonotonicTime total_user, total_sys;
+ ErtsMonotonicTime prev_user, prev_sys, user, sys;
+
+#ifdef HAVE_GETRUSAGE
+
+ struct rusage now;
+
+ if (getrusage(RUSAGE_SELF, &now) != 0) {
+ erts_exit(ERTS_ABORT_EXIT, "getrusage(RUSAGE_SELF, _) failed: %d\n", errno);
+ return;
+ }
+
+ user = (ErtsMonotonicTime) now.ru_utime.tv_sec;
+ user *= (ErtsMonotonicTime) 1000000;
+ user += (ErtsMonotonicTime) now.ru_utime.tv_usec;
+ user /= (ErtsMonotonicTime) 1000;
+
+ sys = (ErtsMonotonicTime) now.ru_stime.tv_sec;
+ sys *= (ErtsMonotonicTime) 1000000;
+ sys += (ErtsMonotonicTime) now.ru_stime.tv_usec;
+ sys /= (ErtsMonotonicTime) 1000;
+
+#else
+
SysTimes now;
sys_times(&now);
- total_user = (ErtsMonotonicTime) ((now.tms_utime * 1000) / SYS_CLK_TCK);
- total_sys = (ErtsMonotonicTime) ((now.tms_stime * 1000) / SYS_CLK_TCK);
+ user = (ErtsMonotonicTime) now.tms_utime;
+ user *= (ErtsMonotonicTime) 1000;
+ user /= (ErtsMonotonicTime) SYS_CLK_TCK;
- if (ms_user != NULL)
- *ms_user = total_user;
- if (ms_sys != NULL)
- *ms_sys = total_sys;
+ sys = (ErtsMonotonicTime) now.tms_stime;
+ sys *= (ErtsMonotonicTime) 1000;
+ sys /= (ErtsMonotonicTime) SYS_CLK_TCK;
+
+#endif
+
+ if (ms_user)
+ *ms_user = user;
+ if (ms_sys)
+ *ms_sys = sys;
if (ms_user_diff || ms_sys_diff) {
- erts_mtx_lock(&erts_timeofday_mtx);
-
- prev_total_user = (ErtsMonotonicTime) ((t_start.tms_utime * 1000) / SYS_CLK_TCK);
- prev_total_sys = (ErtsMonotonicTime) ((t_start.tms_stime * 1000) / SYS_CLK_TCK);
- t_start = now;
-
- erts_mtx_unlock(&erts_timeofday_mtx);
+
+ erts_mtx_lock(&runtime_prev.data.mtx);
- if (ms_user_diff != NULL)
- *ms_user_diff = total_user - prev_total_user;
-
- if (ms_sys_diff != NULL)
- *ms_sys_diff = total_sys - prev_total_sys;
+ prev_user = runtime_prev.data.user;
+ prev_sys = runtime_prev.data.sys;
+ runtime_prev.data.user = user;
+ runtime_prev.data.sys = sys;
+
+ erts_mtx_unlock(&runtime_prev.data.mtx);
+
+ if (ms_user_diff)
+ *ms_user_diff = user - prev_user;
+ if (ms_sys_diff)
+ *ms_sys_diff = sys - prev_sys;
}
}
@@ -1326,7 +1378,7 @@ elapsed_time_both(ErtsMonotonicTime *ms_user, ErtsMonotonicTime *ms_sys,
/* wall clock routines */
void
-wall_clock_elapsed_time_both(ErtsMonotonicTime *ms_total, ErtsMonotonicTime *ms_diff)
+erts_wall_clock_elapsed_both(ErtsMonotonicTime *ms_total, ErtsMonotonicTime *ms_diff)
{
ErtsMonotonicTime now, elapsed;
@@ -1334,16 +1386,18 @@ wall_clock_elapsed_time_both(ErtsMonotonicTime *ms_total, ErtsMonotonicTime *ms_
update_last_mtime(NULL, now);
elapsed = ERTS_MONOTONIC_TO_MSEC(now);
+ elapsed -= ERTS_MONOTONIC_TO_MSEC(ERTS_MONOTONIC_BEGIN);
*ms_total = elapsed;
if (ms_diff) {
- erts_mtx_lock(&erts_timeofday_mtx);
+ ErtsMonotonicTime prev;
- *ms_diff = elapsed - prev_wall_clock_elapsed;
- prev_wall_clock_elapsed = elapsed;
+ prev = ((ErtsMonotonicTime)
+ erts_atomic64_xchg_mb(&wall_clock_prev.time,
+ (erts_aint64_t) elapsed));
- erts_mtx_unlock(&erts_timeofday_mtx);
+ *ms_diff = elapsed - prev;
}
}
@@ -1722,22 +1776,27 @@ univ_to_local(Sint *year, Sint *month, Sint *day,
void
get_now(Uint* megasec, Uint* sec, Uint* microsec)
{
- ErtsMonotonicTime now_megasec, now_sec, now, mtime, time_offset;
+ ErtsMonotonicTime now_megasec, now_sec, now, prev, mtime, time_offset;
mtime = time_sup.r.o.get_time();
time_offset = get_time_offset();
update_last_mtime(NULL, mtime);
now = ERTS_MONOTONIC_TO_USEC(mtime + time_offset);
- erts_mtx_lock(&erts_timeofday_mtx);
-
/* Make sure now time is later than last time */
- if (now <= previous_now)
- now = previous_now + 1;
-
- previous_now = now;
-
- erts_mtx_unlock(&erts_timeofday_mtx);
+ prev = erts_atomic64_read_nob(&now_prev.time);
+ while (1) {
+ ErtsMonotonicTime act;
+ if (now <= prev)
+ now = prev + 1;
+ act = ((ErtsMonotonicTime)
+ erts_atomic64_cmpxchg_mb(&now_prev.time,
+ (erts_aint64_t) now,
+ (erts_aint64_t) prev));
+ if (act == prev)
+ break;
+ prev = act;
+ }
now_megasec = now / ERTS_MONOTONIC_TIME_TERA;
now_sec = now / ERTS_MONOTONIC_TIME_MEGA;
diff --git a/erts/emulator/beam/sys.h b/erts/emulator/beam/sys.h
index 615f44364b..d54b4b2830 100644
--- a/erts/emulator/beam/sys.h
+++ b/erts/emulator/beam/sys.h
@@ -757,10 +757,6 @@ Preload* sys_preloaded(void);
unsigned char* sys_preload_begin(Preload*);
void sys_preload_end(Preload*);
int sys_get_key(int);
-void elapsed_time_both(ErtsMonotonicTime *ms_user, ErtsMonotonicTime *ms_sys,
- ErtsMonotonicTime *ms_user_diff, ErtsMonotonicTime *ms_sys_diff);
-void wall_clock_elapsed_time_both(ErtsMonotonicTime *ms_total,
- ErtsMonotonicTime *ms_diff);
void get_time(int *hour, int *minute, int *second);
void get_date(int *year, int *month, int *day);
void get_localtime(int *year, int *month, int *day,
diff --git a/erts/emulator/sys/unix/erl_unix_sys.h b/erts/emulator/sys/unix/erl_unix_sys.h
index cbbd0e6f40..b6f5b319ee 100644
--- a/erts/emulator/sys/unix/erl_unix_sys.h
+++ b/erts/emulator/sys/unix/erl_unix_sys.h
@@ -86,6 +86,10 @@
#include <sys/times.h>
+#ifdef HAVE_SYS_RESOURCE_H
+# include <sys/resource.h>
+#endif
+
#ifdef HAVE_IEEEFP_H
#include <ieeefp.h>
#endif
diff --git a/erts/emulator/test/statistics_SUITE.erl b/erts/emulator/test/statistics_SUITE.erl
index 6c01bfd45c..7a396d273c 100644
--- a/erts/emulator/test/statistics_SUITE.erl
+++ b/erts/emulator/test/statistics_SUITE.erl
@@ -23,8 +23,10 @@
%% Tests the statistics/1 bif.
-export([all/0, suite/0, groups/0,
+ wall_clock_sanity/1,
wall_clock_zero_diff/1, wall_clock_update/1,
- runtime_zero_diff/1,
+ runtime_sanity/1,
+ runtime_zero_diff/1,
runtime_update/1, runtime_diff/1,
run_queue_one/1,
scheduler_wall_time/1,
@@ -54,11 +56,23 @@ all() ->
groups() ->
[{wall_clock, [],
- [wall_clock_zero_diff, wall_clock_update]},
+ [wall_clock_sanity, wall_clock_zero_diff, wall_clock_update]},
{runtime, [],
- [runtime_zero_diff, runtime_update, runtime_diff]},
+ [runtime_sanity, runtime_zero_diff, runtime_update, runtime_diff]},
{run_queue, [], [run_queue_one]}].
+wall_clock_sanity(Config) when is_list(Config) ->
+ erlang:yield(),
+ {WallClock, _} = statistics(wall_clock),
+ MT = erlang:monotonic_time(),
+ Time = erlang:convert_time_unit(MT - erlang:system_info(start_time),
+ native, millisecond),
+ io:format("Time=~p WallClock=~p~n",
+ [Time, WallClock]),
+ true = WallClock =< Time,
+ true = Time - 100 =< WallClock,
+ ok.
+
%%% Testing statistics(wall_clock).
%% Tests that the 'Wall clock since last call' element of the result
@@ -102,6 +116,20 @@ wall_clock_update1(0) ->
%%% Test statistics(runtime).
+runtime_sanity(Config) when is_list(Config) ->
+ case erlang:system_info(logical_processors_available) of
+ unknown ->
+ {skipped, "Don't know available logical processors"};
+ LP when is_integer(LP) ->
+ erlang:yield(),
+ {RunTime, _} = statistics(runtime),
+ MT = erlang:monotonic_time(),
+ Time = erlang:convert_time_unit(MT - erlang:system_info(start_time),
+ native, millisecond),
+ io:format("Time=~p RunTime=~p~n",
+ [Time, RunTime]),
+ true = RunTime =< Time*LP
+ end.
%% Tests that the difference between the times returned from two consectuitive
%% calls to statistics(runtime) is zero.
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-09 05:45:26 +0000