Hello, The same application (relatively heavy code), provides different values when it is run and compiled on 2 different machines. Both F40 (last update) gcc (GCC) 14.2.1 20240912 (Red Hat 14.2.1-3) One Intel(R) Core(TM) i5-7400 CPU @ 3.00GHz The other one Intel(R) Core(TM) i7-8700 CPU @ 3.20GHz Actually, this happens when I use the gsl library. gsl-devel-2.7.1-8.fc40.x86_64 for integration (gsl_integration_cquad). Before integration, the values are strictly identical. The same Makefile is used. Now, if I copy the code generated by the machine A on machine B, I get the same results as it had been run on machine A. The size of both codes are slightly different. I conclude that the issue is due to the compiler. Indeed, the difference in the generated values seems pretty constant, i.e., it seems proportional to the value itself: of the order 2.7e-8 (relative difference) i.e. a lot higher than the accuracy of the machine: < 1e-35.
Which one is the good one? Why this behavior? Can I solve the issue? Thank for any help. =========================================================================== Patrick DUPRÉ | | email: pdu...@gmx.com ===========================================================================
