Further: The trace sample from Activity Monitor below was taken when Squeak3.9-8.app shows 100% cpu, trying to run with squeak- dev-beta-107.image. Can anyone shed some light on what is happening?

On my machine (Mac Intel) exactly the same happens with any stock image and Squeak-3.9-8 VM from http://www.squeakvm.org/unix/.

Cheers, Lukas

2007-04-16 10:40:53.063 sample[1457] thread_read_stack: stack appears to be in inconsistent state to trace. Truncating stack. Analysis of sampling pid 1445 every 10.000000 milliseconds Call graph: 299 Thread_0f07 299 -[NSApplication run] 299 -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] 299 _DPSNextEvent 299 AEProcessAppleEvent 299 aeProcessAppleEvent 299 dispatchEventAndSendReply(AEDesc const*, AEDesc*) 299 aeDispatchAppleEvent(AEDesc const*, AEDesc*, unsigned long, unsigned char*) 299 _NSAppleEventManagerGenericHandler 299 -[NSAppleEventManager dispatchRawAppleEvent:withRawReply:handlerRefCon:] 299 -[NSApplication(NSAppleEventHandling) _handleCoreEvent:withReplyEvent:] 299 -[NSApplication(NSAppleEventHandling) _handleAEOpen:] 299 -[NSApplication _sendFinishLaunchingNotification] 299 -[NSApplication _postDidFinishNotification] 299 -[NSNotificationCenter postNotificationName:object:] 299 -[NSNotificationCenter postNotificationName:object:userInfo:] 299 _CFXNotificationPostNotification 299 __CFXNotificationPost 299 setUpWindow 299 -[SqueakView setFrame:] 299 -[SqueakView setFrame:] 299 Thread_1003 299 _pthread_body 299 PrivateMPEntryPoint 297 kevent 297 kevent 2 _sigtramp 2 _sigtramp 299 Thread_1103 299 _pthread_body 299 PrivateMPEntryPoint 299 TNodeSyncTask::SyncTaskProc(void*) 299 MPWaitOnQueue 299 semaphore_wait_signal_trap 299 semaphore_wait_signal_trap 299 Thread_1203 299 _pthread_body 299 forkThreadForFunction 299 -[NSUIHeartBeat _heartBeatThread:] 297 syscall_thread_switch 297 syscall_thread_switch 2 -[NSUIHeartBeat _heartBeatThread:]

Total number in stack (recursive counted multiple, when >=5):

Sort by top of stack, same collapsed (when >= 5): -[SqueakView setFrame:] 299 semaphore_wait_signal_trap 299 kevent 297 syscall_thread_switch 297 Sample analysis of process 1445 written to file /dev/stdout Sampling process 1445 each 10 msecs 300 times

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