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Patch looks great!

Reviews applied: [42197]

Passed command: export OS=ubuntu:14.04;export CONFIGURATION="--verbose";export 
COMPILER=gcc; ./support/docker_build.sh

- Mesos ReviewBot


On Jan. 14, 2016, 3:28 p.m., Jan Schlicht wrote:
> 
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> This is an automatically generated e-mail. To reply, visit:
> https://reviews.apache.org/r/42197/
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> 
> (Updated Jan. 14, 2016, 3:28 p.m.)
> 
> 
> Review request for mesos, Benjamin Bannier and Till Toenshoff.
> 
> 
> Bugs: MESOS-3082
>     https://issues.apache.org/jira/browse/MESOS-3082
> 
> 
> Repository: mesos
> 
> 
> Description
> -------
> 
> Virtual machines may not always support 'CPU performance counters'. Tests
> trying to collect to 'cycle' value of 'perf' will fail under these
> circumstances. This will be avoided by disabling these tests if 'perf' 
> hardware
> events are not available.
> 
> 
> Diffs
> -----
> 
>   src/tests/environment.cpp 20218a086baefcefb310eb45ed9024e5425ce787 
> 
> Diff: https://reviews.apache.org/r/42197/diff/
> 
> 
> Testing
> -------
> 
> Running `sudo ./bin/mesos-tests.sh 
> --gtest_filter="*ROOT_CGROUPS_Perf:*ROOT_CGROUPS_Sample:*ROOT_CGROUPS_UserCgroup:*CGROUPS_ROOT_PerfRollForward:*ROOT_Sample"`
> 
> 1) In a Linux VM without 'CPU performance counters': This doesn't run the 
> tests and shows an error message that 'cycles' is not available, as expected
> 2) In a Linux VM without 'perf': This doesn't run the tests and shows an 
> error message that 'perf' is not installed, as expected
> 3) On OSX: This doesn't run the tests and shows an error message that 'perf' 
> is not available, as expected
> 4) NOT TESTED YET!!! On native Linux (i.e. with 'CPU performance counters'): 
> This runs the tests.
> 
> 
> Thanks,
> 
> Jan Schlicht
> 
>

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