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[Bug libstdc++/40852] [parallel-mode] parallel sort run time increases ~10 fold when vector size gets over ~4*10^9
- From: "singler at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 20 Oct 2009 07:46:18 -0000
- Subject: [Bug libstdc++/40852] [parallel-mode] parallel sort run time increases ~10 fold when vector size gets over ~4*10^9
- References: <bug-40852-8473@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #7 from singler at gcc dot gnu dot org 2009-10-20 07:46 -------
Sorry, the CC has never reached me.
So concerning comment #4: Was the parallel mode actually activated?
The multiway mergesort takes another time the space of the input as
temporarily. Sure that the program was not swapping?
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40852