[Pharo-project] Speeding up Pharo 1.1

Eliot Miranda 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
count).


HTH
Eliot

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
> 105.0ms
>        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
> -285.0ms
>        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?
>
> Nicolas
>
> 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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> >
>
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