# Pybombs issue

**URL:** <https://www.ruby-forum.com/t/pybombs-issue/238430>\
**Category:** GNU Radio\
**Created:** [January 9, 2014, 5:17pm UTC](https://www.ruby-forum.com/t/pybombs-issue/238430 "2014-01-09T17:17:22Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![musicdenotation](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/ea666f/32.png) [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\
**Post date:** [January 9, 2014, 5:17pm UTC](https://www.ruby-forum.com/t/pybombs-issue/238430/1 "2014-01-09T17:17:22Z")

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I did an update to pybombs two days ago, and immediately gnuradio got to  
around 57% completion and just hung my Ubuntu 13.10 computer so hard, I  
couldn’t get it to respond to ctrl-alt-del for over half and hour.

I tried again after doing a force rebuild on gnuradio and it was worse.  
I  
long-hit the power button to do a reset.

I checked the pybombs defaults and it is makewidth = 4, but it certainly  
acts like it is ignoring this and doing

make -j

. Further symptoms include a nonstop, hard green LED on disk writes on  
a 8  
GB system. I have never seen it actually go to a major use of virtual  
memory (if that is what is happening) until now.

I went into src/gnuradio/build and did a manual make -j4 and it worked  
perfectly, thus my diagnosis.

Bob

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**Author:** ![Robert\_McGwier](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/r/c68b51/32.png) [@Robert\_McGwier](https://www.ruby-forum.com/u/Robert_McGwier)\
**Post date:** [January 9, 2014, 5:28pm UTC](https://www.ruby-forum.com/t/pybombs-issue/238430/2 "2014-01-09T17:28:29Z")

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On Thu, Jan 9, 2014 at 11:15 AM, Robert McGwier [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)  
wrote:

> make -j
> 
> . Further symptoms include a nonstop, hard green LED on disk writes on a 8  
> GB system. I have never seen it actually go to a major use of virtual  
> memory (if that is what is happening) until now.
> 
> I went into src/gnuradio/build and did a manual make -j4 and it worked  
> perfectly, thus my diagnosis.
> 
> Bob

Yep, making with an unnumerated -j is really dangerous, even on very  
high-end systems.

There was another report about issues with makewidth, so that needs  
looking into.

Tom

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**Author:** ![Robert\_McGwier](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/r/c68b51/32.png) [@Robert\_McGwier](https://www.ruby-forum.com/u/Robert_McGwier)\
**Post date:** [January 14, 2014, 11:39pm UTC](https://www.ruby-forum.com/t/pybombs-issue/238430/3 "2014-01-14T23:39:08Z")

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It should now prompt for a value if makewidth is undefined w  
an open -j argument was never the intended behavior - as it is not  
particularly safe

Also the boost recipe has been converted to do $makewidth wide builds  
with bjam now

-Tim