I'm seeing the exact same thing. I have Siri disabled, and have NEVER used Siri. Yet I keep seeing com.apple.siri.embeddedspeech.cpu_resource logs in my Analytics Data. ...telling me CPU usage is high. Why is "embedded speech" running at all? Let alone chewing up enough CPU use to cause a log entry?
I only have 3 apps that I gave permission to use the mic: 2 "camcorder" apps, and SigScopePro. I have power cycled the phone, and not run any of those, and STILL see embedded speech running. Futhermore, I have Jetsam Events that show "LargestProcess" : "com.apple.siri.embeddedspeech" !!
This is disturbing. What is going on?? Is my phone hacked, and spying on me with the mic? Can anyone explain this?
It's also odd that it's been over 2 months since you asked this, and nobody has responded, despite there being 120 views of this post. Given that, it would appear that this is not normal iPhone behavior.
I have iOS 10.3.1 on iPhone 6s. I've seen this with the previous iOS version as well. I've only recently discovered this log, so I don't know if it's been happening since day 1 or not.
I should add: I don't see Siri listed under my battery usage.