What type of PR is this?

Uncomment only one /kind <> line, hit enter to put that in a new line, and remove leading whitespaces from that line:

/kind bug
/kind task
/kind feature

What does this PR do / why do we need it:
Recommended sm>=7 to compute fp16 ops with tensorcore, and enforce sm >= 6 to compute fp16 ops.

Which issue(s) this PR fixes:

Fixes #
https://gitee.com/mindspore/dashboard/programs/67813?issue_id=I1F6UV
Special notes for your reviewers: