[Pharo-project] Speeding up Pharo 1.1
eliot.miranda at gmail.com
Sat Oct 16 14:43:09 EDT 2010
Hi Bart, Nicolas,
Bart, are you using the standard VM or Cog?
Nicolas, if this is the standard VM then do the two images have the same
value for allocationsBetweenGCs (Smalltalk vmParameterAt: 5)? If not, that
could account for the difference in incremental GC frequency (in Cog the IGC
trigger mechanism is different, based on space allocated not allocation
On Sat, Oct 16, 2010 at 6:37 AM, Nicolas Cellier <
nicolas.cellier.aka.nice at gmail.com> wrote:
> I can feel this slugginess too, and we should fix that for good.
> A clue: in Squeak trunk, here are the VM stats:
> uptime 0h7m59s
> memory 59,647,648 bytes
> old 48,744,032 bytes (81.7%)
> young 545,352 bytes (0.9%)
> used 49,289,384 bytes (82.6%)
> free 10,358,264 bytes (17.4%)
> GCs 288 (1665ms between GCs)
> full 0 totalling 0ms (0.0% uptime)
> incr 288 totalling 486ms (0.0% uptime), avg 2.0ms
> tenures 15 (avg 19 GCs/tenure)
> Since last view -7,895
> uptime 71.2s
> full -15 totalling -1,576ms (-2.0% uptime), avg
> incr -7880 totalling -1,952ms (-3.0% uptime), avg
> tenures -548 (avg 14 GCs/tenure)
> In Pharo:
> uptime 0h6m48s
> memory 29,690,612 bytes
> old 25,210,060 bytes (84.9%)
> young 252,096 bytes (0.8%)
> used 25,462,156 bytes (85.80000000000001%)
> free 4,228,456 bytes (14.200000000000001%)
> GCs 4,969 (82ms between GCs)
> full 3 totalling 834ms (0.2% uptime), avg 278.0ms
> incr 4966 totalling 6,280ms (1.5% uptime), avg 1.3ms
> tenures 75 (avg 66 GCs/tenure)
> Since last view 4,777 (85ms between GCs)
> uptime 404.5s
> full 1 totalling -285ms (-0.1% uptime), avg
> incr 4776 totalling 6,088ms (1.5% uptime), avg 1.3ms
> tenures 75 (avg 63 GCs/tenure)
> A GC every 82ms, 20x+ more GC than trunk... Something is going wrong.
> Could it be object creation at each event or something like that?
> 2010/10/16 Sven Van Caekenberghe <sven at beta9.be>:
> > Bart,
> > On 16 Oct 2010, at 13:48, Bart Veenstra wrote:
> >> Hi list,
> >> I have been working with Pharo for almost a month now, and I suspect
> >> that the performance is degrading fast. UI tasks takes several seconds
> >> to react to my keyboard.
> >> At work we use VAST and I have experience with VW as well and those
> >> smalltaks react to my keyboard and mouse actions instantly. But Pharo
> >> works very sluggish.
> >> My image is about 130MB because I have loaded all dutch postcode in
> >> memory, but that should not affect the performance of general
> >> operations like typing with the keyboard. I am not a fast typer, but
> >> sometimes it takes seconds to show my keyboard input. I can't use the
> >> down key to select the right method from suggestions, because it seems
> >> to lockup completely.
> >> Are there ways to speedup Pharo? I would love to use cogVM but I
> >> haven't got gemtools working on it...
> >> Will upgrading to 1.1.1 fix these issues?
> >> Is my OS (Windows 7-64bit) causing these issues?
> >> Regards,
> >> Bart
> > I am just guessing here, but I would suspect the slowdown to be related
> to completion/syntax coloring issues.
> > You could try a pharo core image or one of lukas's builds (take
> development or seaside from http://hudson.lukas-renggli.ch/).
> > In a large/old image, there could be lots of issues, of course.
> > HTH,
> > Sven
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