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Comparing deliantra/server/lib/cf.pm (file contents):
Revision 1.263 by root, Sat May 5 05:40:27 2007 UTC vs.
Revision 1.265 by root, Fri May 11 08:00:00 2007 UTC

… …
90our $LINK_MAP; # the special {link} map, which is always available 90our $LINK_MAP; # the special {link} map, which is always available
91 91
92# used to convert map paths into valid unix filenames by replacing / by ∕ 92# used to convert map paths into valid unix filenames by replacing / by ∕
93our $PATH_SEP = "∕"; # U+2215, chosen purely for visual reasons 93our $PATH_SEP = "∕"; # U+2215, chosen purely for visual reasons
94 94
95our $LOAD; # a number between 0 (idle) and 1 (too many objects)
96our $LOADAVG; # same thing, but with alpha-smoothing
97our $tick_start; # for load detecting purposes
98
95binmode STDOUT; 99binmode STDOUT;
96binmode STDERR; 100binmode STDERR;
97 101
98# read virtual server time, if available 102# read virtual server time, if available
99unless ($RUNTIME || !-e "$LOCALDIR/runtime") { 103unless ($RUNTIME || !-e "$LOCALDIR/runtime") {
… …
138The time of the last (current) server tick. 142The time of the last (current) server tick.
139 143
140=item $cf::TICK 144=item $cf::TICK
141 145
142The interval between server ticks, in seconds. 146The interval between server ticks, in seconds.
147
148=item $cf::LOADAVG
149
150The current CPU load on the server (alpha-smoothed), as a value between 0
151(none) and 1 (overloaded), indicating how much time is spent on processing
152objects per tick. Healthy values are < 0.5.
153
154=item $cf::LOAD
155
156The raw value load value from the last tick.
143 157
144=item %cf::CFG 158=item %cf::CFG
145 159
146Configuration for the server, loaded from C</etc/crossfire/config>, or 160Configuration for the server, loaded from C</etc/crossfire/config>, or
147from wherever your confdir points to. 161from wherever your confdir points to.
… …
318 332
319sub sync_job(&) { 333sub sync_job(&) {
320 my ($job) = @_; 334 my ($job) = @_;
321 335
322 if ($Coro::current == $Coro::main) { 336 if ($Coro::current == $Coro::main) {
337 my $time = Event::time;
338
323 # this is the main coro, too bad, we have to block 339 # this is the main coro, too bad, we have to block
324 # till the operation succeeds, freezing the server :/ 340 # till the operation succeeds, freezing the server :/
325 341
326 # TODO: use suspend/resume instead 342 # TODO: use suspend/resume instead
327 # (but this is cancel-safe) 343 # (but this is cancel-safe)
… …
338 354
339 while ($busy) { 355 while ($busy) {
340 Coro::cede or Event::one_event; 356 Coro::cede or Event::one_event;
341 } 357 }
342 358
359 $time = Event::time - $time;
360
361 LOG llevError | logBacktrace, "long sync job\n"
362 if $time > $TICK * 0.5;
363
364 $tick_start += $time; # do not account sync jobs to server load
365
343 wantarray ? @res : $res[0] 366 wantarray ? @res : $res[0]
344 } else { 367 } else {
345 # we are in another coroutine, how wonderful, everything just works 368 # we are in another coroutine, how wonderful, everything just works
346 369
347 $job->() 370 $job->()
… …
367 390
368 $coro 391 $coro
369} 392}
370 393
371sub write_runtime { 394sub write_runtime {
395 my $runtime = "$LOCALDIR/runtime";
396
397 # first touch the runtime file to show we are still running:
398 # the fsync below can take a very very long time.
399
400 if (my $fh = aio_open $runtime, O_WRONLY, 0) {
401 utime undef, undef, $fh;
402 }
403
372 my $guard = cf::lock_acquire "write_runtime"; 404 my $guard = cf::lock_acquire "write_runtime";
373 405
374 my $runtime = "$LOCALDIR/runtime";
375
376 warn "starting to write runtime...\n";#d#
377 my $fh = aio_open "$runtime~", O_WRONLY | O_CREAT, 0644 406 my $fh = aio_open "$runtime~", O_WRONLY | O_CREAT, 0644
378 or return; 407 or return;
379 408
380 my $value = $cf::RUNTIME + 90 + 10; 409 my $value = $cf::RUNTIME + 90 + 10;
381 # 10 is the runtime save interval, for a monotonic clock 410 # 10 is the runtime save interval, for a monotonic clock
… …
386 415
387 # always fsync - this file is important 416 # always fsync - this file is important
388 aio_fsync $fh 417 aio_fsync $fh
389 and return; 418 and return;
390 419
420 # touch it again to show we are up-to-date
421 utime undef, undef, $fh;
422
391 close $fh 423 close $fh
392 or return; 424 or return;
393 425
394 aio_rename "$runtime~", $runtime 426 aio_rename "$runtime~", $runtime
395 and return; 427 and return;
396 428
397 warn "... done writing runtime.\n";#d# 429 warn "runtime file written.\n";#d#
398 430
399 1 431 1
400} 432}
401 433
402=item cf::datalog type => key => value, ... 434=item cf::datalog type => key => value, ...
… …
2827 Carp::cluck "major BUG: server tick called outside of main coro, skipping it" 2859 Carp::cluck "major BUG: server tick called outside of main coro, skipping it"
2828 unless ++$bug_warning > 10; 2860 unless ++$bug_warning > 10;
2829 return; 2861 return;
2830 } 2862 }
2831 2863
2832 $NOW = Event::time; 2864 $NOW = $tick_start = Event::time;
2833 2865
2834 cf::server_tick; # one server iteration 2866 cf::server_tick; # one server iteration
2835 2867
2836 $RUNTIME += $TICK; 2868 $RUNTIME += $TICK;
2837 $NEXT_TICK += $TICK; 2869 $NEXT_TICK += $TICK;
… …
2845 } 2877 }
2846 2878
2847# my $AFTER = Event::time; 2879# my $AFTER = Event::time;
2848# warn $AFTER - $NOW;#d# 2880# warn $AFTER - $NOW;#d#
2849 2881
2882 if (my $sig = shift @WAIT_FOR_TICK_BEGIN) {
2883 $sig->send;
2884 }
2885 while (my $sig = shift @WAIT_FOR_TICK) {
2886 $sig->send;
2887 }
2888
2889 $NOW = Event::time;
2890
2850 # if we are delayed by four ticks or more, skip them all 2891 # if we are delayed by four ticks or more, skip them all
2851 $NEXT_TICK = Event::time if Event::time >= $NEXT_TICK + $TICK * 4; 2892 $NEXT_TICK = $NOW if $NOW >= $NEXT_TICK + $TICK * 4;
2852 2893
2853 $TICK_WATCHER->at ($NEXT_TICK); 2894 $TICK_WATCHER->at ($NEXT_TICK);
2854 $TICK_WATCHER->start; 2895 $TICK_WATCHER->start;
2855 2896
2856 if (my $sig = shift @WAIT_FOR_TICK_BEGIN) { 2897 $LOAD = ($NOW - $tick_start) / $TICK;
2857 $sig->send; 2898 $LOADAVG = $LOADAVG * 0.75 + $LOAD * 0.25;
2858 }
2859 while (my $sig = shift @WAIT_FOR_TICK) {
2860 $sig->send;
2861 }
2862 2899
2863 _post_tick; 2900 _post_tick;
2901
2902
2864 }, 2903 },
2865); 2904);
2866 2905
2867{ 2906{
2868 BDB::max_poll_time $TICK * 0.1; 2907 BDB::max_poll_time $TICK * 0.1;

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