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From "Glenn Weidner" <gweid...@us.ibm.com>
Subject RE: [jira] [Updated] (SYSTEMML-1591) Improve efficiency sparse-unsafe cellwise operations
Date Sat, 09 Sep 2017 23:18:13 GMT

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Regards,
Glenn



From:	Himanshu Mohan <Himanshu.Mohan@aexp.com.INVALID>
To:	"dev@systemml.apache.org" <dev@systemml.apache.org>
Date:	09/08/2017 09:53 PM
Subject:	RE: [jira] [Updated] (SYSTEMML-1591) Improve efficiency
            sparse-unsafe cellwise operations



Hi,

I will like to unsubscribe to this email . Pleae let me know the process







Thanks

Himanshu





-----Original Message-----

From: Glenn Weidner (JIRA) [mailto:jira@apache.org]

Sent: Saturday, September 09, 2017 6:43 AM

To: issues@systemml.apache.org

Subject: [jira] [Updated] (SYSTEMML-1591) Improve efficiency sparse-unsafe
cellwise operations





     [
https://urldefense.proofpoint.com/v2/url?u=https-3A__issues.apache.org_jira_browse_SYSTEMML-2D1591-3Fpage-3Dcom.atlassian.jira.plugin.system.issuetabpanels-3Aall-2Dtabpanel&d=DwIGaQ&c=jf_iaSHvJObTbx-siA1ZOg&r=we2L9Q2NOeniL5PbfdrO3CmQPNy_vnhoDpPDviJpnrU&m=RktQi2xPy3D4v_pydzFm0hBIG_kvTLq1iaesP8jrz_w&s=Yhuz1kJmjUQ1Sl6gPiKJ9jarqyofSJVGJ0MMfc3vAUA&e=
  ]



Glenn Weidner updated SYSTEMML-1591:

------------------------------------

    Fix Version/s:     (was: SystemML 1.0)

                   SystemML 0.15



> Improve efficiency sparse-unsafe cellwise operations

> ----------------------------------------------------

>

>                 Key: SYSTEMML-1591

>                 URL:
https://urldefense.proofpoint.com/v2/url?u=https-3A__issues.apache.org_jira_browse_SYSTEMML-2D1591&d=DwIGaQ&c=jf_iaSHvJObTbx-siA1ZOg&r=we2L9Q2NOeniL5PbfdrO3CmQPNy_vnhoDpPDviJpnrU&m=RktQi2xPy3D4v_pydzFm0hBIG_kvTLq1iaesP8jrz_w&s=GkK6Qsfz4YtXzhzfYRYMBQh6SSHBXE6Ps1_qJLAPP1Y&e=


>             Project: SystemML

>          Issue Type: Sub-task

>          Components: Compiler, Runtime

>            Reporter: Matthias Boehm

>            Assignee: Matthias Boehm

>             Fix For: SystemML 0.15

>

>

> For sparse-unsafe cellwise operations, we currently iterate over all
cells and use binary search to access the individual values. This is
unnecessarily inefficient to should be reworked in favor of a sequential
scan with gap handling, which would also allow us to consolidate the
different code paths for sparse-safe and -unsafe operations.







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