Re: [Factor-talk] benchmark is rigged?

[Alexander Ilin]

Hello!

  I ran the same test suite a few times adding and removing the /usepmtimer 
option and rebooting the system.

  The results were consistent: when the option switch is there, `benchmark` 
works correctly, otherwise it doesn't. When it didn't work it could measure an 
80-second quotation and say that it ran in under one second.

  I was tempted to switch to the `now now swap time-` approach, but decided 
against it, seeing that the Boot.ini option has reliably fixed the `benchmark`.

  The GetTickCount is what I would normally use in Delphi, especially since I 
don't need a sub-second precision anyway for my use case, but in Factor I 
decided to go with the standard Factor library, and therefore the `benchmark` 
word.

  I don't think that's something to be fixed in Factor. That's a Windows (or 
maybe even BIOS or a CPU) problem, so there has to be the kind of fix that I 
implemented. It's on par with having the correct driver for the system hardware 
- you can't expect application software to compensate for that.

  And yes, let's hope newer Windows versions and PCs are not going to have 
problems like that.

30.07.2016, 02:31, "Björn Lindqvist" :
> That is very interesting! I've looked at how Python does benchmarking
> and it does not use QPC:
>
> On Windows, QueryPerformanceCounter() is not used even though it has a
> better resolution than GetTickCount() . It is not reliable and has too
> many issues.
>
> https://www.python.org/dev/peps/pep-0418/
>
> So we could switch to use GetTickCount() instead but the drawback is
> that that function has abysmal resolution. Then again, XP is a very
> old operating system..

---=---
 Александр

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Re: [Factor-talk] Font

[Björn Lindqvist]

I think adding the images to the image would be neat. The icon for
Factor is already embedded in the image like you suggest. You can see
the code for that in basis/ui/backend/gtk/gtk.factor. Something like
that could be generalized to work for other images too. Then if you
are making a game or something, all your assets would be neatly packed
into a single .exe file.

2016-07-25 18:34 GMT+02:00 Alexander Ilin :
> Hello!
>
> 25.07.2016, 16:47, "John Benediktsson" :
>
> You can reset the memoized so then next time it gets called it will memoize
> again:
>
> IN: scratchpad \ windows-fonts reset-memoized
>
>
>
>   Hold on a second! Looking at the `startup-hooks`, I see one hook named
> "windows.fonts", and it does this:
> `[ \ (cache-font) reset-memoized ]`
>
>   Shouldn't we add `\ windows-fonts reset-memoized` to the same existing
> hook?
>
>
> You could probably put that in a .factor-rc if you need it run on startup.
>
>
>
>   No, I probably found a bug! : ) Let's fix the hook instead!
> https://github.com/factor/factor/pull/1678
>
>
> Why do you need those icon images cached in the Factor image?
>
>
>   I think it's a bit awkward to have everything in the image, except for the
> images.
>   Get it? Images?
>   Never mind.
>
> ---=---
> Александр
>
>
> --
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> consuming the most bandwidth. Provides multi-vendor support for NetFlow,
> J-Flow, sFlow and other flows. Make informed decisions using capacity
> planning
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Re: [Factor-talk] benchmark is rigged?

[Björn Lindqvist]

That is very interesting! I've looked at how Python does benchmarking
and it does not use QPC:

On Windows, QueryPerformanceCounter() is not used even though it has a
better resolution than GetTickCount() . It is not reliable and has too
many issues.

https://www.python.org/dev/peps/pep-0418/

So we could switch to use GetTickCount() instead but the drawback is
that that function has abysmal resolution. Then again, XP is a very
old operating system..


2016-07-24 23:43 GMT+02:00 Alexander Ilin :
> Hello!
>
>   It looks like adding the /usepmtimer switch to the boot.ini has fixed the 
> problem for that PC. At least the same test cases no longer reproduce the 
> error after a reboot.
>
>   Source of inspiration: http://www.virtualdub.org/blog/pivot/entry.php?id=106
>
> 24.07.2016, 21:59, "Alexander Ilin" :
>> Hello!
>>
>>   I'm having a weird problem with the benchmark word on my WinXP SP3 32-bit 
>> machine, running the latest Factor from Github master.
>>
>>   The benchmark word reports times under or about 1 second (1,000,000,000) 
>> for some piece of code, but the actual run time of the quotation is always 
>> about 5-6 seconds.
>>
>>   For example, here's a sketch of a test session, without restarting a 
>> Factor instance, done in the following order.
>>
>>   This code would show running time < 1 sec:
>>
>> [ do-smth ] benchmark
>>
>>   Then this code would show the correct wall time for both the time word and 
>> the benchmark word:
>>
>> [ [ do-smth ] time ] benchmark
>>
>>   This would show the correct timing for both words as well:
>>
>> [ [ do-smth ] benchmark ] time
>>
>>   Finally, returning to this code again measures incorrectly (< 1 sec):
>>
>> [ do-smth ] benchmark
>>
>>   Has anyone experienced anything like this before?
>>
>>   Replacing [ do-smth ] with [ now do-smth now ] shows the correct time in 
>> all cases, and by calculating difference I can see that benchmark calculates 
>> incorrectly. But I can't figure out the reason.
>>
>>   On the other hand, replacing [ do-smth ] with [ nano-count do-smth 
>> nano-count ] I see that benchmark is right. So, the problem is that for some 
>> reason nano-count returns lower time difference for the code I run, 
>> depending on the way I run it - with or without the "time" word.
>
> ---=---
>  Александр
>
> --
> What NetFlow Analyzer can do for you? Monitors network bandwidth and traffic
> patterns at an interface-level. Reveals which users, apps, and protocols are
> consuming the most bandwidth. Provides multi-vendor support for NetFlow,
> J-Flow, sFlow and other flows. Make informed decisions using capacity planning
> reports.http://sdm.link/zohodev2dev
> ___
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Re: [Factor-talk] Fractional Part Function

[Alexander Ilin]

Hello, John!   I like it, thank you! 29.07.2016, 17:12, "John Benediktsson" :You could use ``1 mod``:     IN: scratchpad 123.45038945034895 1 mod .    0.4503894503489505     IN: scratchpad -123.45038945034895 1 mod .    -0.4503894503489505  On Fri, Jul 29, 2016 at 6:41 AM, Alexander Ilin  wrote:Hello!    I can't find the function that would return the fractional part of a float in our standard library.   I need something to this effect: http://www.freepascal.org/docs-html/rtl/system/frac.html    A little help, please?  ---=---  Александр  -- ___ Factor-talk mailing list Factor-talk@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/factor-talk,--,___Factor-talk mailing listFactor-talk@lists.sourceforge.nethttps://lists.sourceforge.net/lists/listinfo/factor-talk  ---=---Александр --
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Re: [Factor-talk] Fractional Part Function

[John Benediktsson]

Also, the ``math.floating-point``  vocabulary provides a way to turn
doubles into ratios:

IN: scratchpad 3.14159 double>ratio .
3+159416167809847/1125899906842624

On Fri, Jul 29, 2016 at 7:11 AM, John Benediktsson  wrote:

> You could use ``1 mod``:
>
> IN: scratchpad 123.45038945034895 1 mod .
> 0.4503894503489505
>
> IN: scratchpad -123.45038945034895 1 mod .
> -0.4503894503489505
>
>
>
> On Fri, Jul 29, 2016 at 6:41 AM, Alexander Ilin  wrote:
>
>> Hello!
>>
>>   I can't find the function that would return the fractional part of a
>> float in our standard library.
>>   I need something to this effect:
>> http://www.freepascal.org/docs-html/rtl/system/frac.html
>>
>>   A little help, please?
>>
>> ---=---
>>  Александр
>>
>>
>> --
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>>
>
>
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Re: [Factor-talk] Fractional Part Function

[John Benediktsson]

You could use ``1 mod``:

IN: scratchpad 123.45038945034895 1 mod .
0.4503894503489505

IN: scratchpad -123.45038945034895 1 mod .
-0.4503894503489505



On Fri, Jul 29, 2016 at 6:41 AM, Alexander Ilin  wrote:

> Hello!
>
>   I can't find the function that would return the fractional part of a
> float in our standard library.
>   I need something to this effect:
> http://www.freepascal.org/docs-html/rtl/system/frac.html
>
>   A little help, please?
>
> ---=---
>  Александр
>
>
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>
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[Factor-talk] Fractional Part Function

[Alexander Ilin]

Hello!

  I can't find the function that would return the fractional part of a float in 
our standard library.
  I need something to this effect: 
http://www.freepascal.org/docs-html/rtl/system/frac.html

  A little help, please?

---=---
 Александр

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