[Insight-developers] Not Really Parallel Build

[Bill Lorensen]

Does RUN_SERIAL require ctest 2.8? We only require 2.6 for itk currently.

Bill

On Thu, Nov 12, 2009 at 10:52 AM, Bill Hoffman <bill.hoffman at kitware.com> wrote:
> Kevin H. Hobbs wrote:
>>
>> On 11/12/2009 07:40 AM, Gaëtan Lehmann wrote:
>>>
>>> Your host was loaded by something else?
>>
>> No, I was just logged in over ssh.
>>
>>> The execution time should decrease with the number of threads - that's
>>> not always the case here.
>>>
>>> I found firefox (with ~ 20 tabs) to be quite bad for the performance for
>>> example!
>>>
>>
>> Firefox is a bit of a memory hog, but it's nothing compared to the
>> memory used when ITK is tested with :
>>
>> ITK_COMPUTER_MEMORY_SIZE:STRING=12
>>
>> I just re-ran some of the parallel tests now that I'm in the lab and am
>> better able to monitor what's going on.
>>
>> When CTest hit the IO tests in parallel the system used all 12 gigabytes
>> of memory and started swapping.
>>
>> There were several IO tests running at once all of which were requiring
>> several gigabytes of memory.
>>
>> Is there some way to make the large memory IO tests run sequentially
>> during parallel testing?
>>
>> If not, then I'll abandon parallel testing since large image processing
>> is important to my work and speeding up testing is not very important to
>> me.
>>
> Yes, we can set the RUN_SERIAL property on those tests in the cmake files.
>
>  RUN_SERIAL: If set to true, this test will not run in parallel with
>      any other tests. This should be used in conjunction with
>      the ctest_test PARALLEL_LEVEL option.
>
>
> -Bill
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