Optimise cpufreq for IKS
- optimise cpufreq driver for IKS
Blueprint information
- Status:
- Complete
- Approver:
- Amit Kucheria
- Priority:
- Essential
- Drafter:
- None
- Direction:
- Approved
- Assignee:
- viresh kumar
- Definition:
- Approved
- Series goal:
- Accepted for trunk
- Implementation:
-
Implemented
- Milestone target:
-
2013.03
- Started by
- Amit Kucheria
- Completed by
- David Zinman
Related branches
Related bugs
Sprints
Whiteboard
Patches till now for optimizing cpufreq driver of vexpress:
Fixes:
cpufreq: vexpress: Don't assume there are only 8 freqs passed for big cluster
cpufreq: vexpress: Don't initialize policy-> min, max twice
cpufreq: vexpress: Create sysfs cluster_switch attributes only when bl switching is enabled
cpufreq:vexpress: Avoid double checking of cluster_
cpufreq:vexpress: Switch to little core if a overlapping frequencies
Optimizations:
cpufreq: vexpress: Save cpu_last_req_freq earlier
cpufreq: vexpress: Initialize cpu_last_req_freq in init()
cpufreq: Add cpufreq_
cpufreq: vexpress: Set dying cluster to lowest freq possible
cpufreq: vexpress: Re-check freq of old_cluster on cpu migration
Status 2013.02:
Performance/power figures with latest branch from Nico have gone bad. We are investigating on what happened, but nothing conclusive yet.
Meta:
Headline: TBD
Acceptance: TBD
Roadmap id: TBD
Work Items
Work items for 2012.10:
Create setup to run ARM internal benchmark suite: DONE
Understand IKS Vexpress cpufreq driver: DONE
Optimize whatever possible in IKS Vexpress cpufreq driver: DONE
Share patches with ARM and Mathieu for above work: DONE
Work items for 2012.11:
Share my setup with Mathieu: DONE
Write clk driver for ARM-SPC cpu clock controller: DONE
Work items for 2012.12:
Refactor cpufreq driver: DONE
Replicate Mathieu's work setup at my place to verify power figures: DONE
Fix cpufreq driver to work with on-the-fly disablement of bl_switcher: DONE
Host Automated Workload Benchmark Suite in a linaro private repo: DONE
Optimize/Fix issues in Workbench: DONE
Fix Nico/next kernel crashes due to cpufreq framework: DONE
Run lots of benchmark tests: DONE
Fix potential bugs in cpufreq core: DONE
Supply the same cpufreq driver to ARM LT Team: DONE
Work on spreadsheet used for keeping results: DONE
Fix any pending issues with cpufreq driver: DONE
Work items for 2013.03:
Help & Guide Naresh to get bench-marking done for new master and next branch: DONE
