random number bug in Pelegant 23.1.0
Posted: 29 Jun 2010, 08:24
A bug was just discovered in version 23.1.0 of Pelegant related to certain random number generators. In particular, it would affect the SREFFECTS element and any elements (e.g., CSBEND, KQUAD) that have the ISR flag set to 1. This bug does not affect serial elegant or prior versions of Pelegant.
The bug is that the random number generators are identical across all processors. For a case where quantum excitation is not dominant, this won't affect results much. However, if you are, for example, tracking in a ring for many damping times, you'll get very odd results.
The attached file patches the problem for those who build from source. We'll try to post updated versions in a few days.
--Michael
The bug is that the random number generators are identical across all processors. For a case where quantum excitation is not dominant, this won't affect results much. However, if you are, for example, tracking in a ring for many damping times, you'll get very odd results.
The attached file patches the problem for those who build from source. We'll try to post updated versions in a few days.
--Michael