[SYSTEMDS-2427] Incorrect nnz after rand of large dense block

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: SystemML 1.2
• Assignee: Matthias Boehm
• Reporter: Matthias Boehm
• Created: 28/Jun/18 05:23
• Updated: 19/May/20 19:42
• Resolved: 19/May/20 19:42

Description

The following code gives correctly 2.0E9 with with N=20000000 but consistently 2.4970522E9 with N=25000000 independent of the runtime seed.

X = rand(rows=N, cols=100)
if(sum(X)==0)
  X[7,] = matrix(0, 1, 100)
print(sum(X!=0));