Hi Jeff
Thanks for the tip. Now its working but scaling is not good.
[mukesh.tiwari@pg155-n3 ParallelStrat]$ time ./Main +RTS -N1
1000001
real 0m0.591s
user 0m0.517s
sys 0m0.060s
[mukesh.tiwari@pg155-n3 ParallelStrat]$ time ./Main +RTS -N2 -s
1000001
618,757,264 bytes allocated in the heap
197,678,448 bytes copied during GC
34,481,184 bytes maximum residency (11 sample(s))
19,652,184 bytes maximum slop
88 MB total memory in use (0 MB lost due to fragmentation)
Tot time (elapsed) Avg pause Max pause
Gen 0 670 colls, 669 par 0.28s 0.21s 0.0003s 0.0015s
Gen 1 11 colls, 11 par 0.36s 0.25s 0.0225s 0.0523s
*Parallel GC work balance: 1.14 (24701953 / 21591478, ideal 2)*
MUT time (elapsed) GC time (elapsed)
Task 0 (worker) : 0.17s ( 0.09s) 0.64s ( 0.46s)
Task 1 (worker) : 0.81s ( 0.56s) 0.00s ( 0.00s)
Task 2 (bound) : 0.16s ( 0.10s) 0.64s ( 0.46s)
Task 3 (worker) : 0.81s ( 0.56s) 0.00s ( 0.00s)
SPARKS: 2 (2 converted, 0 overflowed, 0 dud, 0 GC'd, 0 fizzled)
INIT time 0.00s ( 0.00s elapsed)
MUT time 0.17s ( 0.10s elapsed)
GC time 0.64s ( 0.46s elapsed)
EXIT time 0.00s ( 0.00s elapsed)
Total time 0.80s ( 0.56s elapsed)
Alloc rate 3,705,754,641 bytes per MUT second
Productivity 20.7% of total user, 30.1% of total elapsed
gc_alloc_block_sync: 12718
whitehole_spin: 0
gen[0].sync: 0
gen[1].sync: 0
real 0m0.575s
user 0m0.805s
sys 0m0.300s
Regards
Mukesh Tiwari
On Thu, Apr 19, 2012 at 6:56 AM, Jeff Shaw <[email protected]> wrote:
> Hello Mukesh Tiwari,
> I'm wondering what happens if you replace "return ()" with "print (last
> xs)".
>
> Jeff
>
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