[Scons-users] Prioritization of builds

[Michael Potter]

What if SCons tracked how long each step took, then optimized the
order on subsequent builds?

On Sat, Jan 16, 2016 at 8:53 AM, William Blevins <wblevins001 at gmail.com> wrote:
> It looks like ModelSim does provide a FlexNet (previously FlexLM) license
> solution. It might be worth investigating. If you are using hardware
> security key, I am surprised that you cannot run more than one instance. I
> always thought the point was to tie to software to a particular machine...
>
> On Sat, Jan 16, 2016 at 1:25 PM, Brian Cody <brian.j.cody at gmail.com> wrote:
>>
>> The tool in question is Modelsim. We have license dongles--no server. If
>> Modelsim is currently running a simulation on a given computer and another
>> instance is started on the same computer, the command will fail with an
>> error return status.
>>
>> Side effect seemed to be appropriate in this case!
>>
>> On Jan 15, 2016 10:40 PM, "Bill Deegan" <bill at baddogconsulting.com> wrote:
>>>
>>> Most flexlm licensed tools can enable this. Though it's up to the
>>> developer to do so.
>>> (I've deployed flexlm at a number of clients for their software licensing
>>> (on the software producer side))
>>>
>>> -Bill
>>>
>>> On Fri, Jan 15, 2016 at 5:57 PM, William Blevins <wblevins001 at gmail.com>
>>> wrote:
>>>>
>>>> I have used tools like this before and did not require a side-effect
>>>> file. For example, Intel compilers require a license server. Even with a
>>>> single floating license, I can run jobs in parallel without an issue because
>>>> license requests are queued by the license server, so this is handled
>>>> outside of SCons. What tool are you using?
>>>>
>>>> V/R,
>>>> William
>>>>
>>>> On Fri, Jan 15, 2016 at 6:02 PM, Brian Cody <brian.j.cody at gmail.com>
>>>> wrote:
>>>>>
>>>>> Hello fellow sconsians,
>>>>>
>>>>> Let's say I have 1000 targets to build. There are some dependencies
>>>>> between them but over all there's a considerable amount of parallelism
>>>>> possible. Now let's say 10 of those targets require the use of a licensed
>>>>> tool which can only run one at a time. I use a side effect to enforce that
>>>>> with those 10 targets. I typically run with -j12 or so, one for each virtual
>>>>> core available. This works, and I'm happy.
>>>>>
>>>>> Except.. Those 10 builds I mentioned just happen to be very slow. The
>>>>> final target built will always be one of those ten. That's fine. However,
>>>>> the build will take much longer than necessary if it doesn't happen to start
>>>>> building those targets early. And doing that would require that their
>>>>> dependencies are also built early. However for some reason, these targets
>>>>> seem to always get started towards the end of the build.
>>>>>
>>>>> Today this is a minor annoyance. It may be adding 30 seconds to a 1
>>>>> minute 30 second build. Looking in my crystal ball this problem will be
>>>>> getting much much worse with some of the new targets that are coming.
>>>>>
>>>>> Is there a known way to influence the order at which targets are built
>>>>> without introducing phony dependencies or side effects? So if A and B are
>>>>> both ready to built right now, and one job-doer becomes available, is there
>>>>> any way I can cause SCons to pick them up in a particular order? Maybe by
>>>>> influencing a container holding onto targets?
>>>>>
>>>>> Thank you!
>>>>>
>>>>>
>>>>> _______________________________________________
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>>>>> Scons-users at scons.org
>>>>> https://pairlist4.pair.net/mailman/listinfo/scons-users
>>>>>
>>>>
>>>>
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>>>
>>>
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>>
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>
>
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-- 
Michael Potter
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