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224 | The pool size is limited to 8 idle coroutines (this can be adjusted by |
224 | The pool size is limited to 8 idle coroutines (this can be adjusted by |
225 | changing $Coro::POOL_SIZE), and there can be as many non-idle coros as |
225 | changing $Coro::POOL_SIZE), and there can be as many non-idle coros as |
226 | required. |
226 | required. |
227 | |
227 | |
228 | If you are concerned about pooled coroutines growing a lot because a |
228 | If you are concerned about pooled coroutines growing a lot because a |
229 | single C<async_pool> used a lot of stackspace you can e.g. C<async_pool { |
229 | single C<async_pool> used a lot of stackspace you can e.g. C<async_pool |
230 | terminate }> once per second or so to slowly replenish the pool. |
230 | { terminate }> once per second or so to slowly replenish the pool. In |
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231 | addition to that, when the stacks used by a handler grows larger than 16kb |
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232 | (adjustable with $Coro::POOL_RSS) it will also exit. |
231 | |
233 | |
232 | =cut |
234 | =cut |
233 | |
235 | |
234 | our $POOL_SIZE = 8; |
236 | our $POOL_SIZE = 8; |
235 | our $MAX_POOL_RSS = 64 * 1024; |
237 | our $POOL_RSS = 16 * 1024; |
236 | our @pool; |
238 | our @async_pool; |
237 | |
239 | |
238 | sub pool_handler { |
240 | sub pool_handler { |
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241 | my $cb; |
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242 | |
239 | while () { |
243 | while () { |
240 | $current->{desc} = "[async_pool]"; |
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241 | |
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242 | eval { |
244 | eval { |
243 | my ($cb, @arg) = @{ delete $current->{_invoke} or return }; |
245 | while () { |
244 | $cb->(@arg); |
246 | _pool_1 $cb; |
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247 | &$cb; |
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248 | _pool_2 $cb; |
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249 | &schedule; |
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250 | } |
245 | }; |
251 | }; |
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252 | |
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253 | last if $@ eq "\3terminate\2\n"; |
246 | warn $@ if $@; |
254 | warn $@ if $@; |
247 | |
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248 | last if @pool >= $POOL_SIZE || $current->rss >= $MAX_POOL_RSS; |
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249 | |
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250 | push @pool, $current; |
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251 | $current->{desc} = "[async_pool idle]"; |
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252 | $current->save (Coro::State::SAVE_DEF); |
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253 | $current->prio (0); |
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254 | schedule; |
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255 | } |
255 | } |
256 | } |
256 | } |
257 | |
257 | |
258 | sub async_pool(&@) { |
258 | sub async_pool(&@) { |
259 | # this is also inlined into the unlock_scheduler |
259 | # this is also inlined into the unlock_scheduler |
260 | my $coro = (pop @pool) || new Coro \&pool_handler;; |
260 | my $coro = (pop @async_pool) || new Coro \&pool_handler; |
261 | |
261 | |
262 | $coro->{_invoke} = [@_]; |
262 | $coro->{_invoke} = [@_]; |
263 | $coro->ready; |
263 | $coro->ready; |
264 | |
264 | |
265 | $coro |
265 | $coro |
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535 | # inside an event callback. |
535 | # inside an event callback. |
536 | our $unblock_scheduler = new Coro sub { |
536 | our $unblock_scheduler = new Coro sub { |
537 | while () { |
537 | while () { |
538 | while (my $cb = pop @unblock_queue) { |
538 | while (my $cb = pop @unblock_queue) { |
539 | # this is an inlined copy of async_pool |
539 | # this is an inlined copy of async_pool |
540 | my $coro = (pop @pool or new Coro \&pool_handler); |
540 | my $coro = (pop @async_pool) || new Coro \&pool_handler; |
541 | |
541 | |
542 | $coro->{_invoke} = $cb; |
542 | $coro->{_invoke} = $cb; |
543 | $coro->ready; |
543 | $coro->ready; |
544 | cede; # for short-lived callbacks, this reduces pressure on the coro pool |
544 | cede; # for short-lived callbacks, this reduces pressure on the coro pool |
545 | } |
545 | } |