[ https://issues.apache.org/jira/browse/SYSTEMML-1545?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Matthias Boehm closed SYSTEMML-1545. ------------------------------------ > Incorrect leftindexing memory estimate w/ empty input in loops > -------------------------------------------------------------- > > Key: SYSTEMML-1545 > URL: https://issues.apache.org/jira/browse/SYSTEMML-1545 > Project: SystemML > Issue Type: Bug > Reporter: Matthias Boehm > Assignee: Matthias Boehm > Priority: Blocker > Fix For: SystemML 0.14 > > > The current memory estimate of leftindexing operations is incorrect (in terms > of a dangerous underestimation that leads to OOMs) for empty input matrices > in loops. For example, consider the following script > {code} > R = matrix(0, N, r^2); > parfor(i in 1:nrow(X)) { > Xi = X[i,] > R[i,] = matrix(t(Xi)%*%Xi, 1, ncol(X)^2) > } > {code} > In this scenario, the memory estimate of R[i,] is mistakenly set to a single > row, which is only valid during dynamic recompilation with constant indexing > range quantifiers. -- This message was sent by Atlassian JIRA (v6.3.15#6346)