Opened 5 years ago

Closed 7 weeks ago

#142 closed defect (migrated)

Problem dsbmip takes half an hour in -miplib unit test with GCC 4.4 or older

Reported by: kelman Owned by: tkr
Priority: minor Component: Cbc
Version: trunk Keywords:
Cc: kelman@…

Description

Mostly a heads-up, since Data/miplib3 is only getting used by Cbc/trunk and in CoinAll. When compiled with GCC 4.4.x (or older, also happened for 4.1.2), the dsbmip problem takes half an hour during make test where it only takes about 20 seconds with GCC 4.6.4 or 4.8.x. Oddly just calling ./cbc ../Data/miplib3/dsbmip.gz (from installed build/bin folder) solves the problem in less than a second, but calling ./cbc -miplib appears to change the options in some way that causes a very long runtime for this problem with older GCC versions. Might be something to look into, or at least make a note of.

Change History (2)

comment:1 Changed 5 years ago by kelman

Here are some make test logs for comparison GCC 4.6.3 https://gist.github.com/7671984 GCC 4.4.7 https://gist.github.com/7672197 GCC 4.5.3 https://gist.github.com/7671988 Clang 3.3, Clang++ 3.3, Gfortran 4.6.3 https://gist.github.com/7671977

Last edited 5 years ago by kelman (previous) (diff)

comment:2 Changed 7 weeks ago by stefan

  • Resolution set to migrated
  • Status changed from new to closed

This ticket has been migrated to GitHub and will be resolved there: https://github.com/coin-or/Cbc/issues/142

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