iterations-leak
main :: IO ()
main = do
task <- getSomeTask 10000000
let run = runTask task
runTask task `onException` printTaskName taskresults in
3,836,443,504 bytes allocated in the heap
1,819,820,720 bytes copied during GC
524,932,280 bytes maximum residency (4 sample(s))
5,196,616 bytes maximum slop
1124 MiB total memory in use (0 MB lost due to fragmentation)
Tot time (elapsed) Avg pause Max pause
Gen 0 26 colls, 26 par 1.487s 0.744s 0.0286s 0.0683s
Gen 1 4 colls, 3 par 1.657s 0.850s 0.2125s 0.4907s
Parallel GC work balance: 0.01% (serial 0%, perfect 100%)
TASKS: 6 (1 bound, 5 peak workers (5 total), using -N2)
SPARKS: 0 (0 converted, 0 overflowed, 0 dud, 0 GC'd, 0 fizzled)
INIT time 0.001s ( 0.001s elapsed)
MUT time 0.704s ( 0.699s elapsed)
GC time 3.145s ( 1.594s elapsed)
EXIT time 0.008s ( 0.006s elapsed)
Total time 3.857s ( 2.300s elapsed)
Alloc rate 5,451,749,197 bytes per MUT second
Productivity 18.2% of total user, 30.4% of total elapsed
main :: IO ()
main = do
task <- getSomeTask 10000000
let run = runTask task
run *> runresults in
6,234,180,464 bytes allocated in the heap
2,813,201,368 bytes copied during GC
968,126,072 bytes maximum residency (5 sample(s))
9,564,552 bytes maximum slop
2095 MiB total memory in use (0 MB lost due to fragmentation)
Tot time (elapsed) Avg pause Max pause
Gen 0 44 colls, 44 par 1.524s 0.762s 0.0173s 0.0645s
Gen 1 5 colls, 4 par 3.663s 1.863s 0.3725s 0.9561s
Parallel GC work balance: 0.01% (serial 0%, perfect 100%)
TASKS: 6 (1 bound, 5 peak workers (5 total), using -N2)
SPARKS: 0 (0 converted, 0 overflowed, 0 dud, 0 GC'd, 0 fizzled)
INIT time 0.001s ( 0.001s elapsed)
MUT time 1.267s ( 1.257s elapsed)
GC time 5.187s ( 2.625s elapsed)
EXIT time 0.001s ( 0.006s elapsed)
Total time 6.457s ( 3.890s elapsed)
Alloc rate 4,919,342,994 bytes per MUT second
Productivity 19.6% of total user, 32.3% of total elapsed
When compiled getSomeIterations is worker-wrapper-transformed and the worker looks like this:
Rec {
-- RHS size: {terms: 30, types: 53, coercions: 7, joins: 0/2}
$wgetSomeIterations
= \ @ m_s25P ww_s261 ww1_s26k ww2_s26o ->
case ww2_s26o of ds_X1OJ {
__DEFAULT ->
let { lvl8_s22M = ww1_s26k (lvl7_r2cg `cast` <Co:7>) } in
let {
lvl9_s22N
= $wgetSomeIterations ww_s261 ww1_s26k (-# ds_X1OJ 1#) } in
ww_s261
(Next
()
(\ b_avB ->
case b_avB of {
False -> lvl8_s22M;
True -> lvl9_s22N
}));
0# -> ww_s261 lvl3_r2cc
}
end Rec }
Note how the recursive call has floated outside of the Next constructor.