You are viewing a plain text version of this content. The canonical link for it is here.
Posted to issues@systemml.apache.org by "Matthias Boehm (JIRA)" <ji...@apache.org> on 2017/06/02 05:36:04 UTC
[jira] [Resolved] (SYSTEMML-1655) Wrong cost-based decisions of
selecting fusion plans
[ https://issues.apache.org/jira/browse/SYSTEMML-1655?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Matthias Boehm resolved SYSTEMML-1655.
--------------------------------------
Resolution: Fixed
> Wrong cost-based decisions of selecting fusion plans
> ----------------------------------------------------
>
> Key: SYSTEMML-1655
> URL: https://issues.apache.org/jira/browse/SYSTEMML-1655
> Project: SystemML
> Issue Type: Bug
> Affects Versions: SystemML 0.14
> Reporter: Matthias Boehm
> Assignee: Matthias Boehm
> Fix For: SystemML 1.0
>
>
> There are a number of patterns, where the codegen, default cost-based plan selector chooses suboptimal plans. This includes:
> 1) Overlapping row aggregates
> {code}
> R1 = t(X) %*% (X %*% v);
> R2 = t(X) %*% (w * (X %*% v));
> {code}
> 2) Outer product plans
> {code}
> R1 = X * (7 + (U %*% t(V) + 3));
> R2 = (X * (7 + (U %*% t(V) + 3))) %*% V;
> R3 = t(U) %*% (X * (7 + (U %*% t(V) + 3)));
> R = as.matrix(sum(R1 * (7 + (R2 %*% R3 + 3))/1e6));
> {code}
--
This message was sent by Atlassian JIRA
(v6.3.15#6346)