launchd_sim high CPU utilization

Originator:keith
Number:rdar://39039986 Date Originated:30 March 2018
Status:Duplicate/37822125 Closed Resolved:
Product:Xcode Product Version:9.3
Classification:Bug Reproducible:Always
 
Summary: Run Xcode and open a playground. The CPU utilization of the launchd_sim process immediately starts to increase.

The CPU utilisation never drops and is sufficient to cause the fans to spin to cool the CPU.

Steps to Reproduce:

1. Open a playground in Xcode.

Sometimes it is sufficient to just open Xcode without opening a playground or project.

Expected Results:

playground is responsive and machine CPU is not excessive.

Actual Results:

playground is slow and CPU usage is excessive.

Version/Build:

Xcode 9.3 (9E145)

Configuration:

macOS High Sierra v10.13.4
iMac (27-inch, Late 2012)
3.4GHz Intel Core i7
32GB RAM

The output from xcrun simctl diagnose is attached

Comments

I'm seeing this a lot too. iMac Pro 18 core...seeing 1000% cpu utilization.

By jgavris at April 27, 2018, 7:58 p.m. (reply...)

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