[Vm-dev] start up performance regression on Mac OS X

[Eliot Miranda]

Hi All,

    it seems due to this code:

frame #29: 0x0015358c Squeak`-[sqSqueakOSXApplication
setupSoundLogic](self=0x02408810, _cmd="setupSoundLogic") + 412 at
sqSqueakOSXApplication.m:152
   149 snd_Start(2644, 22050, 1, 0);
   150 char silence[10576];
   151 bzero(&silence, sizeof(silence));
-> 152 snd_PlaySamplesFromAtLength(2644,(usqInt * ) &silence,0);
   153 [self.soundInterfaceLogic snd_Stop_Force];
   154 }
   155

who wrote it?  Surely there's a better way of ensuring the sound system is
in a silent way...

On Thu, Oct 11, 2018 at 9:36 PM Eliot Miranda <eliot.miranda at gmail.com>
wrote:

> Hi All,
>
>     in building new VMs today I see appalling startup performance on Mac
> OS X.  It seems to be related to event setup and/or sound initialization.
> I ran under a debugger and interrupted while the system was (slowly)
> launching and both times I saw a similar stack; see below.  So the system
> looks to be caught in some kind of initialization loop:
>
>     frame #7: 0x9331ff16
> CoreAudio`HALC_ShellSimpleProxyList::Reconcile(bool, bool) + 646
>     frame #8: 0x9331f569 CoreAudio`HALC_ShellPlugIn::ConnectToServer() +
> 153
>     frame #9: 0x9338904e
> CoreAudio`HAL_HardwarePlugIn_InitializeWithObjectID(AudioHardwarePlugInInterface**,
> unsigned long) + 78
>     frame #10: 0x9331d818 CoreAudio`HALPlugIn::Initialize() + 48
>     frame #11: 0x9331c3a0
> CoreAudio`HALPlugInManagement::CreateHALPlugIn(HALCFPlugIn const*) + 2048
>     frame #12: 0x9331ac08 CoreAudio`HALPlugInManagement::Initialize() + 552
>     frame #13: 0x93317070 CoreAudio`HALSystem::CheckOutInstance() + 190
>     frame #14: 0x9331e4bb CoreAudio`AudioObjectGetPropertyData + 81
>     frame #15: 0x92643947 AudioToolbox`AQMEIO_HAL::Init() + 201
>     frame #16: 0x92643132
> AudioToolbox`AQMEIOManager::_FindIOUnit(__CFString const*) + 110
>     frame #17: 0x92642f23 AudioToolbox`AQMEDevice::InitPhase2(__CFString
> const*) + 239
>     frame #18: 0x92642e2e AudioToolbox`AQMixEngine_Single::InitPhase2() +
> 24
>     frame #19: 0x92642a34
> AudioToolbox`AQIONodeManager::_FindAQIONode(bool, __CFString const*) + 154
>     frame #20: 0x926426a9
> AudioToolbox`AudioQueueObject::DoIONodeConnect(bool) + 963
>     frame #21: 0x92715bfe
> AudioToolbox`AudioQueueObject::GetIONodeConnection_Init(long&) + 40
>     frame #22: 0x9270b7c6
> AudioToolbox`AudioQueueObject::GetConverterConnection_Init(long&) + 20
>     frame #23: 0x9265a77b
> AudioToolbox`AudioQueueObject::AcquirePlayResources() + 215
>     frame #24: 0x92709095 AudioToolbox`AudioQueueObject::Prime(unsigned
> long, unsigned long&) + 345
>     frame #25: 0x9265a571 AudioToolbox`AQServer_Prime + 95
>     frame #26: 0x9265a43d AudioToolbox`AudioQueuePrime + 364
>     frame #27: 0x0021c841 Squeak`-[sqSqueakSoundCoreAudio
> snd_PlaySamplesFromAtLength:arrayIndex:startIndex:](self=0x0262e990,
> _cmd="snd_PlaySamplesFromAtLength:arrayIndex:startIndex:", frameCount=2644,
> arrayIndex="", startIndex=0) + 481 at sqSqueakSoundCoreAudio.m:319
>     frame #28: 0x0021ed8d
> Squeak`snd_PlaySamplesFromAtLength(frameCount=2644, arrayIndex=0xbfffb588,
> startIndex=0) + 125 at sqSqueakSoundCoreAudioAPI.m:62
>     frame #29: 0x0015358c Squeak`-[sqSqueakOSXApplication
> setupSoundLogic](self=0x02408810, _cmd="setupSoundLogic") + 412 at
> sqSqueakOSXApplication.m:152
>     frame #30: 0x0016b5c9 Squeak`-[sqSqueakMainApplication
> runSqueak](self=0x02408810, _cmd="runSqueak") + 617 at
> sqSqueakMainApplication.m:198
>     frame #31: 0x95216299 Foundation`__NSFirePerformWithOrder + 432
>     frame #32: 0x9379a496
> CoreFoundation`__CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__
> + 22
>     frame #33: 0x9379a3b2 CoreFoundation`__CFRunLoopDoObservers + 498
>     frame #34: 0x9377d7fd CoreFoundation`__CFRunLoopRun + 1661
>     frame #35: 0x9377ce51 CoreFoundation`CFRunLoopRunSpecific + 641
>     frame #36: 0x9377cbba CoreFoundation`CFRunLoopRunInMode + 122
>     frame #37: 0x92d7a37b HIToolbox`RunCurrentEventLoopInMode + 321
>     frame #38: 0x92d79f5f HIToolbox`ReceiveNextEventCommon + 454
>     frame #39: 0x92d79d7b
> HIToolbox`_BlockUntilNextEventMatchingListInModeWithFilter + 71
>     frame #40: 0x9137ab2d AppKit`_DPSNextEvent + 2101
>     frame #41: 0x91aece90 AppKit`-[NSApplication(NSEvent)
> _nextEventMatchingEventMask:untilDate:inMode:dequeue:] + 2859
>     frame #42: 0x91aec35d AppKit`-[NSApplication(NSEvent)
> nextEventMatchingMask:untilDate:inMode:dequeue:] + 134
>     frame #43: 0x9136fa7d AppKit`-[NSApplication run] + 763
>     frame #44: 0x91341b3a AppKit`NSApplicationMain + 1228
>     frame #45: 0x0016558b Squeak`main(argc=2, argv=0xbffff624,
> envp=0xbffff630) + 91 at main.m:52
>     frame #46: 0xa728f611 libdyld.dylib`start + 1
>
>
> I changed sqSqueakOSXApplication.m in August, but only to add some option
> processing.  Anyone have any ideas?
>
> --
> _,,,^..^,,,_
> best, Eliot
>


-- 
_,,,^..^,,,_
best, Eliot
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