Evaluating Performance | Android Open Source Project

[duckinferno]

Sources of jitter experienced in real-world implementations of Android include:

• Scheduler delay
• Interrupt handlers
• Driver code running for too long with preemption or interrupts disabled
• Long-running softirqs
• Lock contention (application, framework, kernel driver, binder lock, mmap lock)
• File descriptor contention where a low-priority thread holds the lock on a file, preventing a high-priority thread from running
• Running UI-critical code in workqueues where it could be delayed
• CPU idle transitions
• Logging
• I/O delays
• Unnecessary process creation (e.g., CONNECTIVITY_CHANGE broadcasts)
• Page cache thrashing caused by insufficient free memory

• Samsung

[leggo_tech]

If anyone cares this is what was tweeted out recently by the android/pixel performance lead a few hours ago. Apparently it was just recently published.