Generic tuning for all Cortex-A devices
The TSC have asked for a GCC optimisation option that gives code that performs well across all of the Cortex-A series. Discuss what that means, how to balance across the targets, how to present it to the user, approach for implementing, and how to qualify the results. Is it worth discussing adding -mcpu=native at the same time?
Blueprint information
- Status:
- Complete
- Approver:
- Michael Hope
- Priority:
- Medium
- Drafter:
- Ramana Radhakrishnan
- Direction:
- Needs approval
- Assignee:
- None
- Definition:
- Approved
- Series goal:
- Accepted for 4.6
- Implementation:
-
Informational
- Milestone target:
-
backlog
- Started by
- Matthew Gretton-Dann
- Completed by
- Matthew Gretton-Dann
Related branches
Related bugs
Sprints
Whiteboard
Work Items (Generic tuning):
Identify best 'generic' cost model: TODO
Define interface (-march, -mcpu, -mtune): TODO
Implement prototype: TODO
Benchmark comparisons: TODO
Discuss upstream: TODO
Final implementation: TODO
Commit upstream: TODO
Commit to Linaro 4.6: TODO
Backport to Linaro 4.5: TODO
Note that /generic/ may mean do best on the A9, do well on others, avoid anything that is terrible on other cores.
michaelh split out native tuning into a new blueprint and put this back into the backlog. Some work has been done but not enough to warrant being 'Started'.
[2013-05-22 matthew-
Work Items
Dependency tree
* Blueprints in grey have been implemented.
