linux-kernel - Re: [LTP] How to get the Linux kernel coverage data on ARM arch when I run LTP test?

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Message-ID: <CA+G9fYv9+Fhyz=nVZQZXxLU0YMTJadfr1XVVVb9P=inEfUaDuA@mail.gmail.com>
Date:	Tue, 18 Feb 2014 20:00:21 +0530
From:	Naresh Kamboju <naresh.kamboju@...aro.org>
To:	Peter Oberparleiter <oberpar@...ux.vnet.ibm.com>,
	Milosz Wasilewski <milosz.wasilewski@...aro.org>
Cc:	Arnd Bergmann <arnd.bergmann@...aro.org>, fhrbata@...hat.com,
	Paul Larson <paul.larson@...onical.com>,
	ltp-list <ltp-list@...ts.sourceforge.net>,
	ltp-coverage <ltp-coverage@...ts.sourceforge.net>,
	Mark Brown <mark.brown@...aro.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Deepak Saxena <dsaxena@...aro.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [LTP] How to get the Linux kernel coverage data on ARM arch when
 I run LTP test?

On 14 February 2014 15:13, Peter Oberparleiter
<oberpar@...ux.vnet.ibm.com> wrote:
> On 14.02.2014 10:02, Naresh Kamboju wrote:
>> root@...aro-developer:/tmp/linux-linaro-3.13-2014.01# gcov kernel/gcov/base.c -o
>>  /sys/kernel/debug/gcov/tmp/linux-linaro-3.13-2014.01/kernel/gcov/
>> File 'kernel/gcov/base.c'
>> Lines executed:43.18% of 44
>> Creating 'base.c.gcov'
>>
>> root@...aro-developer:/tmp/linux-linaro-3.13-2014.01#
>>
>> The above experiment gives coverage of a single file base.c when i run
>> gcov manually.
>> Is there any way to get Linux kernel coverage of all files after
>> running LTP test cases ?
>
> 1. Reset coverage data: lcov -z
> 2. Run LTP (or any other test case)
> 3. Capture coverage data: lcov -c -o coverage.info
> 4. Generate HTML output: genhtml coverage.info -o out
> 5. View HTML output: <browser> out/index.html

It is working !!!
LTP executed on linux-linaro build on vexpress-tc2 target.
Please find results obtained
http://people.linaro.org/~naresh.kamboju/linux-linaro-coverage-by-ltp/

The plan is to run all linaro test suite and to get coverage date.

Peter Oberparleiter,
Thank you very much for your help.

Best regards
Naresh Kamboju

>
> More information on lcov can be found on the page behind the second URL
> your quoted in your mail.
>
>
> Regards,
>   Peter Oberparleiter
>
> --
> Peter Oberparleiter
> Linux on System z Development - IBM Germany
>
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