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

From: Michal Simek <monstr@monstr.eu>
To: Naresh Kamboju <naresh.kamboju@linaro.org>
Cc: ltp-list <ltp-list@lists.sourceforge.net>,
	ltp-coverage <ltp-coverage@lists.sourceforge.net>,
	Peter Oberparleiter <oberpar@linux.vnet.ibm.com>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	Deepak Saxena <dsaxena@linaro.org>,
	"linux-arm-kernel@lists.infradead.org"
	<linux-arm-kernel@lists.infradead.org>,
	fhrbata@redhat.com, Arnd Bergmann <arnd.bergmann@linaro.org>,
	Mark Brown <mark.brown@linaro.org>,
	Milosz Wasilewski <milosz.wasilewski@linaro.org>
Subject: Re: [LTP] How to get the Linux kernel coverage data on ARM arch when I run LTP test?
Date: Mon, 3 Mar 2014 16:21:11 +0100	[thread overview]
Message-ID: <CAHTX3dLrfW_Hbqx_-vEfcHGCh7c4n=Hs1OATfvjJ9UEaxJTCaQ@mail.gmail.com> (raw)
In-Reply-To: <CA+G9fYv9+Fhyz=nVZQZXxLU0YMTJadfr1XVVVb9P=inEfUaDuA@mail.gmail.com>

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HI,

2014-02-18 15:30 GMT+01:00 Naresh Kamboju <naresh.kamboju@linaro.org>:

> On 14 February 2014 15:13, Peter Oberparleiter
> <oberpar@linux.vnet.ibm.com> wrote:
> > On 14.02.2014 10:02, Naresh Kamboju wrote:
> >> root@linaro-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@linaro-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.

Have you already run it? Are these test cases available?

Thanks,
Michal

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