* gprbuild -j8 on Windows 8.1?
@ 2019-06-13 3:10 Stephen Leake
2019-06-13 9:40 ` Egil H H
` (2 more replies)
0 siblings, 3 replies; 6+ messages in thread
From: Stephen Leake @ 2019-06-13 3:10 UTC (permalink / raw)
I'm using GNAT Community 2018.
I have a main program that takes an annoyingly long time to compile, so I tried
gprbuild -j8
But it's no faster, and Windows Task Manager says it's using only one processor.
Is this just broken on Windows?
Does using AdaCores "bash implemented in Ada" help?
-- Stephe
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: gprbuild -j8 on Windows 8.1?
2019-06-13 3:10 gprbuild -j8 on Windows 8.1? Stephen Leake
@ 2019-06-13 9:40 ` Egil H H
2019-06-13 15:47 ` Dennis Lee Bieber
2019-06-17 5:54 ` Fraser Wilson
2 siblings, 0 replies; 6+ messages in thread
From: Egil H H @ 2019-06-13 9:40 UTC (permalink / raw)
On Thursday, June 13, 2019 at 5:10:04 AM UTC+2, Stephen Leake wrote:
> I'm using GNAT Community 2018.
>
> I have a main program that takes an annoyingly long time to compile, so I tried
>
> gprbuild -j8
>
> But it's no faster, and Windows Task Manager says it's using only one processor.
>
> Is this just broken on Windows?
>
> Does using AdaCores "bash implemented in Ada" help?
>
> -- Stephe
As a test, you could try passing the parameter to the compiler in this way:
gprbuild -cargs -j8
--
~egilhh
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: gprbuild -j8 on Windows 8.1?
2019-06-13 3:10 gprbuild -j8 on Windows 8.1? Stephen Leake
2019-06-13 9:40 ` Egil H H
@ 2019-06-13 15:47 ` Dennis Lee Bieber
2019-06-17 5:54 ` Fraser Wilson
2 siblings, 0 replies; 6+ messages in thread
From: Dennis Lee Bieber @ 2019-06-13 15:47 UTC (permalink / raw)
On Wed, 12 Jun 2019 20:10:02 -0700 (PDT), Stephen Leake
<stephen_leake@stephe-leake.org> declaimed the following:
>I'm using GNAT Community 2018.
>
>I have a main program that takes an annoyingly long time to compile, so I tried
>
How many .adb files make up that program? As I read the documentation
...
>gprbuild -j8
>
... mainly spawn separate compilers; for a single program it still uses a
single binder/linker process. If most of your time is in the binder/linker,
the option probably won't gain you much time.
Even if it does help some, take into account that you will have process
startup time for each compiler that gets spawned, along with potential I/O
contention. If a lot of the .adb files are fairly small, the startup time
may be a significant factor.
--
Wulfraed Dennis Lee Bieber AF6VN
wlfraed@ix.netcom.com http://wlfraed.microdiversity.freeddns.org/
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: gprbuild -j8 on Windows 8.1?
2019-06-13 3:10 gprbuild -j8 on Windows 8.1? Stephen Leake
2019-06-13 9:40 ` Egil H H
2019-06-13 15:47 ` Dennis Lee Bieber
@ 2019-06-17 5:54 ` Fraser Wilson
2019-06-19 17:54 ` Stephen Leake
2 siblings, 1 reply; 6+ messages in thread
From: Fraser Wilson @ 2019-06-17 5:54 UTC (permalink / raw)
On Thursday, 13 June 2019 05:10:04 UTC+2, Stephen Leake wrote:
> I'm using GNAT Community 2018.
>
> I have a main program that takes an annoyingly long time to compile, so I tried
>
> gprbuild -j8
>
> But it's no faster, and Windows Task Manager says it's using only one processor.
>
> Is this just broken on Windows?
>
> Does using AdaCores "bash implemented in Ada" help?
>
> -- Stephe
Is it just the main program? -j builds separate sources in parallel, but won't help with individual files.
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: gprbuild -j8 on Windows 8.1?
2019-06-17 5:54 ` Fraser Wilson
@ 2019-06-19 17:54 ` Stephen Leake
2019-06-21 18:36 ` G. B.
0 siblings, 1 reply; 6+ messages in thread
From: Stephen Leake @ 2019-06-19 17:54 UTC (permalink / raw)
On Sunday, June 16, 2019 at 10:54:16 PM UTC-7, Fraser Wilson wrote:
> On Thursday, 13 June 2019 05:10:04 UTC+2, Stephen Leake wrote:
> > I'm using GNAT Community 2018.
> >
> > I have a main program that takes an annoyingly long time to compile, so I tried
> >
> > gprbuild -j8
> >
> > But it's no faster, and Windows Task Manager says it's using only one processor.
> >
> > Is this just broken on Windows?
> >
> > Does using AdaCores "bash implemented in Ada" help?
> >
> > -- Stephe
>
> Is it just the main program? -j builds separate sources in parallel, but won't help with individual files.
yes, that's it. The main program does lots of generic instantiation, so it's slow.
thanks.
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: gprbuild -j8 on Windows 8.1?
2019-06-19 17:54 ` Stephen Leake
@ 2019-06-21 18:36 ` G. B.
0 siblings, 0 replies; 6+ messages in thread
From: G. B. @ 2019-06-21 18:36 UTC (permalink / raw)
Stephen Leake <stephen_leake@stephe-leake.org> wrote:
> On Sunday, June 16, 2019 at 10:54:16 PM UTC-7, Fraser Wilson wrote:
>>
>>
>> Is it just the main program? -j builds separate sources in parallel,
>> but won't help with individual files.
>
> yes, that's it. The main program does lots of generic instantiation, so it's slow.
Do the instances depend on runtime values for instantiation? If actuals are
static, factoring instantiations out to library units might make them
candidates for -j. But, of course, you know this.
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2019-06-21 18:36 UTC | newest]
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2019-06-13 3:10 gprbuild -j8 on Windows 8.1? Stephen Leake
2019-06-13 9:40 ` Egil H H
2019-06-13 15:47 ` Dennis Lee Bieber
2019-06-17 5:54 ` Fraser Wilson
2019-06-19 17:54 ` Stephen Leake
2019-06-21 18:36 ` G. B.
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