According to the documentation for Processor Trace, it should be available on the iPhone 16 or later.
Going off of the Optimize CPU performance with Instruments WWDC session, the toggle for it should be under Developer > Performance, but I don’t see this option anywhere on my iPhone 17. I can’t run a Processor Trace in Instruments without this feature turned on, because it claims my iPhone’s CPU is unsupported.
Has anyone else managed to enable Processor Trace on the A19 chips?
iPhone 17 (A19 Chips) do not require the fixed enablement of processor trace prior to boot. This means they do not require enabling a setting and just work.
If it doesn't require enabling a setting, is there a reason why Instruments claims my iPhone's CPU doesn't support Processor Trace? Even when I try to profile Xcode's template iOS project, Instruments will claim the A19 is unsupported.
Thank you for flagging this issue. We are currently investigating this failure on iPhone 17 family of devices.
This is a software bug, hardware supports Processor Trace feature and with this generation of hardware, need for configuring tracing in System Settings has been removed.
Kacper
