Re: [LTP] [Ltp-coverage] running LCOV/LTP on Beagle Bone Black - Cannot Allocate Memory Error

Re: [LTP] [Ltp-coverage] running LCOV/LTP on Beagle Bone Black - Cannot Allocate Memory Error

[Naresh Kamboju]

hi Shinto,

> Hi Peter,
>
> Thanks for identifying the issue.
> I checked my kernel source code and there is only gcc_3_4.c present in kernel/gcov folder and gcc_4_7.c is NOT present. So as you suggested i will have to upgrade to higher version.
>
> I will check with the latest kernel with GCOV 4.7 on beagle bone black and let you know the result.
>
> currently i use below steps for downloading the kernel source for beagle bone black.
>
> git clone git://github.com/RobertCNelson/linux-dev.git
> cd linux-dev/
> Checkout v3.8.x branch (full cape support):
>
> ~/linux-dev
> git checkout origin/am33x-v3.8 -b tmp

You may use latest linaro arm tool chain.
http://releases.linaro.org/14.03/components/toolchain/binaries/gcc-linaro-arm-linux-gnueabihf-4.8-2014.03_linux.tar.bz2

> ~/linux-dev
> ./build_kernel.sh
> Regards,
> Shinto

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Re: [LTP] [Ltp-coverage] running LCOV/LTP on Beagle Bone Black - Cannot Allocate Memory Error

[shinto.john]

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Re: [LTP] [Ltp-coverage] running LCOV/LTP on Beagle Bone Black - Cannot Allocate Memory Error

[Peter Oberparleiter]

On 09.04.2014 11:18, shinto.john@smartplayin.com wrote:
> now while running "lcov -c -o coverage.info", this runs for ~5 minutes
> without any issues and then is stuck at this below*red *point for long
> time and never exits.
> 
> So i did ctrl-C and tried the "genhtml coverage.info -o out" and it worked.
> 
> I could see the LCOV report(Attached index.html) in "out" folder.
> 
> But looks like complete kernel folders are not there in the LCOV report
> as it was stuck at below point.
> 
> Any comments?
> 
> include/asm-generic/bitops/arch_hweight.h:source file is newer than
> graph file '/home/mallikarjun.bc/LTP/Download/linux-dev/KERNEL/mm/vmstat.gc'
> /home/mallikarjun.bc/LTP/Download/linux-dev/KERNEL/arch/arm/include/asm/bitops.h:source
> file is newer than graph file '/home/mallikarjun.bc/LTP'
> include/linux/workqueue.h:source file is newer than graph file
> '/home/mallikarjun.bc/LTP/Download/linux-dev/KERNEL/mm/vmstat.gcno'
> include/linux/nodemask.h:source file is newer than graph file
> '/home/mallikarjun.bc/LTP/Download/linux-dev/KERNEL/mm/vmstat.gcno'
> *include/linux/kernel.h:source file is newer than graph file
> '/home/mallikarjun.bc/LTP/Download/linux-dev/KERNEL/mm/vmstat.gcno'*

Try running top while lcov is stuck and see if there's a process using
up a lot of CPU time. It might be that you are affected by a gcov bug.

-- 
Peter Oberparleiter
Linux on System z Development - IBM Germany


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Re: [LTP] [Ltp-coverage] running LCOV/LTP on Beagle Bone Black - Cannot Allocate Memory Error

[shinto.john]

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Hi Peter,
 
This got resolved when i tried this in KERNEL/mm/Makefile
GCOV_PROFILE := n
 
So basically some issue with KERNEL/mm/vmstat.gcno... right?
 
Now i am able to do a complete kernel run.
 
Thanks & Regards,
Shinto
 
-----Original Message-----
From: "Peter Oberparleiter" <oberpar@linux.vnet.ibm.com>
Sent: Wednesday, April 9, 2014 6:01pm
To: shinto.john@smartplayin.com, "Naresh Kamboju" <naresh.kamboju@linaro.org>
Cc: ltp-coverage@lists.sourceforge.net, "ltp-list" <ltp-list@lists.sourceforge.net>
Subject: Re: [Ltp-coverage] running LCOV/LTP on Beagle Bone Black - Cannot Allocate Memory Error



On 09.04.2014 11:18, shinto.john@smartplayin.com wrote:
> now while running "lcov -c -o coverage.info", this runs for ~5 minutes
> without any issues and then is stuck at this below*red *point for long
> time and never exits.
> 
> So i did ctrl-C and tried the "genhtml coverage.info -o out" and it worked.
> 
> I could see the LCOV report(Attached index.html) in "out" folder.
> 
> But looks like complete kernel folders are not there in the LCOV report
> as it was stuck at below point.
> 
> Any comments?
> 
> include/asm-generic/bitops/arch_hweight.h:source file is newer than
> graph file '/home/mallikarjun.bc/LTP/Download/linux-dev/KERNEL/mm/vmstat.gc'
> /home/mallikarjun.bc/LTP/Download/linux-dev/KERNEL/arch/arm/include/asm/bitops.h:source
> file is newer than graph file '/home/mallikarjun.bc/LTP'
> include/linux/workqueue.h:source file is newer than graph file
> '/home/mallikarjun.bc/LTP/Download/linux-dev/KERNEL/mm/vmstat.gcno'
> include/linux/nodemask.h:source file is newer than graph file
> '/home/mallikarjun.bc/LTP/Download/linux-dev/KERNEL/mm/vmstat.gcno'
> *include/linux/kernel.h:source file is newer than graph file
> '/home/mallikarjun.bc/LTP/Download/linux-dev/KERNEL/mm/vmstat.gcno'*

Try running top while lcov is stuck and see if there's a process using
up a lot of CPU time. It might be that you are affected by a gcov bug.

-- 
Peter Oberparleiter
Linux on System z Development - IBM Germany


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Re: [LTP] [Ltp-coverage] running LCOV/LTP on Beagle Bone Black - Cannot Allocate Memory Error

[Peter Oberparleiter]

On 09.04.2014 15:04, shinto.john@smartplayin.com wrote:
> This got resolved when i tried this in KERNEL/mm/Makefile
> 
> GCOV_PROFILE := n
> 
> So basically some issue with KERNEL/mm/vmstat.gcno... right?

If you don't need the coverage data for mm/* then this looks like a
feasible workaround.

> Now i am able to do a complete kernel run.

-- 
Peter Oberparleiter
Linux on System z Development - IBM Germany


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