High CPU and Hanging iTunes

If you're one of the folks who has been experiencing a hang in iTunes and high CPU, I have finally managed to break in with a debugger and get a call stack on the high CPU threads. There are two of them and they are both doing the same thing:
0:012> kpn
# ChildEBP RetAddr
00 06f0fc78 7c90d85c ntdll!KiFastSystemCallRet
01 06f0fc7c 7c8023ed ntdll!NtDelayExecution+0xc
02 06f0fcd4 771db8fc kernel32!SleepEx+0x61
03 06f0fe10 771dbcdc wininet!GlobalDataInitialize+0x79
* WARNING: Unable to verify checksum for iTunes.exe
* ERROR: Module load completed but symbols could not be loaded for iTunes.exe
04 06f0fe24 0047a6bd wininet!InternetOpenA+0x1a
WARNING: Stack unwind information not available. Following frames may be wrong.
05 06f0ff8c 0046fae8 iTunes+0x7a6bd
I obviously don't have symbols for iTunes.exe, but my symbols for wininet are lining up fine. The problem is occuring in GlobalDataInitialize when iTunes calls it.
I am posting this primarily for Apple's use. I have a dump file if anyone's interested.
Jim

Okay, didn't take much time to figure out what's really going on.
There are three iTunes threads that are waiting on critical sections. All three of those threads are the same. Once again, obviously no symbols for iTunes.
ChildEBP RetAddr
06c0d9e0 7c90e9c0 ntdll!KiFastSystemCallRet
06c0d9e4 7c91901b ntdll!ZwWaitForSingleObject+0xc
06c0da6c 7c90104b ntdll!RtlpWaitForCriticalSection+0x132
06c0da74 0043fea2 ntdll!RtlEnterCriticalSection+0x46
WARNING: Stack unwind information not available. Following frames may be wrong.
06c0da88 0047abf8 iTunes+0x3fea2
06c0daa4 004767e1 iTunes+0x7abf8
06c0dac4 00477e22 iTunes+0x767e1
06c0db84 0040dcba iTunes+0x77e22
06c0f72c 0073ede0 iTunes+0xdcba
06c0ff54 0073f360 iTunes+0x33ede0
06c0ff70 0062765d iTunes+0x33f360
06c0ff8c 0046fae8 iTunes+0x22765d
06c0ffa0 0075c0a0 iTunes+0x6fae8
06c0ffb4 7c80b50b iTunes+0x35c0a0
Two of the threads that are holding the critical section are the same stack that I posted in my original post. The third is this:
0:010> kp
ChildEBP RetAddr
06d0f3f0 7c90e7c8 ntdll!KiFastSystemCallRet
06d0f3f4 77ddd796 ntdll!ZwSetValueKey+0xc
WARNING: Stack unwind information not available. Following frames may be wrong.
06d0f438 77ddecdf advapi32!RegEnumKeyW+0x14d
06d0f49c 771d2f34 advapi32!RegSetValueExA+0xf8
06d0f4bc 771d2f02 wininet!REGISTRY_OBJ::SetValue+0x19
06d0f4d8 771b8bc3 wininet!IE3_REGISTRYSET::SetLimit+0x29
06d0f4e8 771b7f49 wininet!IE3_REGISTRYSET::FixLegacySettings+0x25
06d0fc78 771b83bb wininet!CConMgr::GetCacheConfigInfo+0x163
06d0fc94 771b837f wininet!CConMgr::ConfigureCache+0x30
06d0fc9c 771b836a wininet!CConMgr::Init+0xa
06d0fca4 771b8db4 wininet!CConMgr::CConMgr+0x2c
06d0fcc8 771b75c4 wininet!InitGlobals+0x12a
06d0fcd0 771b9fd8 wininet!GetUrlCacheHeaderData+0xa
06d0fe10 771dbcdc wininet!GlobalDataInitialize+0x15a
06d0fe24 0047a6bd wininet!InternetOpenA+0x1a
06d0ff8c 0046fae8 iTunes+0x7a6bd
06d0ffa0 0075c0a0 iTunes+0x6fae8
06d0ffb4 7c80b50b iTunes+0x35c0a0
If I dig into this memory, I can see that it's setting a CacheLimit key. Unfortunately, I can't stay broken into iTunes long enough to know if this is still processing or not. If I try to continue and then break again, iTunes just quits.
This repros when I click UPDATE in podcasts. I can repro it every time.
Jim

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Performance issue with high CPU and IO

Hi guys,
I am encountering huge user response time on a production system and I don’t know how to solve it.
Doing some extra tests and using the instrumentation that we have in the code we concluded that the DB is the bottleneck.
We generated some AWR reports and noticed the CPU was in top wait events. Also noticed that in a random manner some simple sql take a long time to execute. We activated the sql trace on the system and noticed that for very simple SQLs (unique index access on one table) we have huge exec times. 9s
In the trace file the huge time we had it in fetch area: 9.1s cpu and elapsed 9.2.
And no or very small waits for this specific SQL.
it seems like the bottle neck is on the CPU but at that point there were very few processes running on the DB. Why can we have such a big cpu wait on a simple select? This is a machine with 128 cores. We have quicker responses on machines smaller/busier than this.
We noticed that we had a huge db_cache_size (12G) and after we scale it down we noticed some improvements but not enough. How can I prove that there is a link between high CPU and big cache_size? (there was not wait involved in SQL execution). what can we do in the case we need big DB cache size?
The second issue is that I tried to execute an sql on a big table (FTS on a big table. no join). Again on that smaller machine it runs in 30 seconds and on this machine it runs in 1038 seconds.
Also generated a trace for this SQL on the problematic machine:
call     count       cpu    elapsed       disk      query    current        rows
Parse        1      0.00       0.00          0          0          0           0
Execute      1      0.00       0.00          0          0          0           0
Fetch        1    402.08    1038.31    1842916    6174343          0           1
total        3    402.08    1038.32    1842916    6174343          0           1
db file sequential read                     12419        0.21         40.02
i/o slave wait                             135475        0.51        613.03
db file scattered read                     135475        0.52        675.15
log file switch completion                      5        0.06          0.18
latch: In memory undo latch                     6        0.00          0.00
latch: object queue header operation            1        0.00          0.00
********************************************************************************The high CPU is present here also but here I have huge wait on db file scattered read.
Looking at the session with the select the AWG_wait for db scattered read was 0.5. on the other machine it is like 0.07.
I though this is an IO issue. I did some IO tests at SO level and it seems like the read and writes operation are very fast…much faster than the machine that has the awg_wait smaller. Why the difference in waits?
One difference between these two DBs is that the problem one has the db block size = 16k and the other one has 8k.
I received some reports done at OS level on CPU and IO usage on the problematic machine (in normal operations). It seems like the CPU is very used and the IO stays very low.
On the other machine, the smaller and the faster one, it is other way around.
What is the problem here? How can I test further? Can I link the high CPU to low/slow IO?
we have 10G on sun os with ASM.
Thanks in advance.

Yes, there are many things you can and should do to isolate this. But first check MOS Poor Performance With Oracle9i and 10g Releases When Using Dynamic Intimate Shared Memory (DISM) [ID 1018855.1] isn't messing you up to start.
Also, be sure and post exact patch levels for both Oracle and OS.
Be sure and check all your I/O settings and see what MOS has to say about those.
Are you using ASSM? See Long running update
Since it got a little better with shrinking the SGA size, that might indicate (wild speculation here, something like) one of the problems is simply too much thrashing within the SGA, as oracle decides "small" objects being full scanned in memory is faster than range scans (or whatever) from disk, overloading the cpu, not allowing the cpu to ask for other full scans from I/O. Possibly made worse by row level locking, or some other app issue that just does too much cpu.
You probably have more than one thing wrong. High fetch count might mean you need to adjust the array size on the clients.
Now that that is all out of the way, if you still haven't found the problem, go through http://oracle-randolf.blogspot.com/2009/02/basic-sql-statement-performance.html
Edit: Oh, see Solaris 10 memory management conflicts with Automatic PGA Memory Management [ID 460424.1] too.
Edited by: jgarry on Nov 15, 2011 1:45 PM

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[URL=http://s46.photobucket.com/user/hoopsontoast/media/IMG_20150126_095930_zpsj3haccgs.png.html][IMG]htt...
[URL=http://s46.photobucket.com/user/hoopsontoast/media/IMG_20150124_230003_zpshi2dpkfo.png.html][IMG]htt...

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Please post over in that thread so we can keep all related in one place.
1. If any post helps you please click the below the post(s) that helped you.
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Message was edited by: Jay Bietz after post accepted.

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Yes, I know this is an old post, I’m cleaning up old post, did you get this fixed, if so what was the solution?
Since no one has answer this post, I recommend opening a support case with CSS as they can work with you to solve this problem.
Garth Jones | My blogs: Enhansoft and
Old Blog site | Twitter:
@GarthMJ

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Message was edited by: ltxenodite

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Hi,
There are few things you can check:
i) Check if you have more than one anti-virus installed..Check for Trial versions.If there is any then uninstall it.
(Sometimes it could be that you have an anti-virus and windows defender or security essentials is also installed)
ii) Next try a Clean Boot and check if it makes a difference. If clean boot fixes the issue then it has to be one of the application on the startup which is slowing it down..
How to perform a clean boot
iii) Run HP Support Assitant and check if there are any pending updates..
Note:
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Although I am an HP employee, I am speaking for myself and not for HP.
**Click on “Kudos” Star if you think this reply helped** Or Mark it as "Solved" if issue got fixed.

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Thanks!

ok the abttery charges to 100% now so its alright but sometimes the charger turns to a dim green for some reason and doesnt stay bright only until I unplug and plug it back in again.
in regards to the random CPU spike, here is a screenshot of activity monitor, hopefully you guys can tell me what mds is..
[IMG]http://i248.photobucket.com/albums/gg175/modernage013/Screenshot2010-06-27at1211 20AM.png[/IMG]

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Hello,
According to the ColdFusion Forums my problem is not a new one but I still want
to post it with the hope to get some kind of answer.
I'm are running the following system:
CF 4.5 Enterprise Server
SiteMinder 6.0
IIS 5.0
MS SqlServer 2005
Both the CF and database server are Win2000 SP4.
About every one hours the CF server uses 100% CPU and from than on it is
impossible to log into the application. The site is still available though.
After restarting the CF service everything works fine until.....
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The site has to go live on Monday so you can imagine the pressure to get
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Jilani

Jilani, you mention that this seems connected to SiteMinder. Do you mean you have your own version of SiteMinder, separate from the built-in one that came with CF 4 and 5? I wonder if there could be a conflict between them. Why are you using the full SiteMinder? And do you really need it?
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http://www.carehart.org/blog/client/index.cfm/2006/10/4/bots_and_spiders_and_poor_CF_perfo rmance
But that may not be the issue if simply enabling/disabling the siteminder service will immediately recreate your problem....unless somehow the DB used by SiteMinder is the same DB used for client variables. Do you have any datasources listed in the CF Admin page for client variables? Any chance there's a connection between them and siteminder?
/charlie
PS This whole issue of client variables and how they can hurt you unexpectedly is something I'll dicuss this Thursday at noon US EDT, when I present "Clients and Sessions and Crashes, Oh My", to the online ColdFusion Meetup: www.coldfusionmeeetup.com.

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Hello,
Recently I have had a problem with my computer running really slow, the CPU is running at almost 100% and the fan wont shut off. Please help its effecting my school work. Below is my EtreCheck.
Thanks.
Problem description:
CPU is up to full usage most of the time and fan won’t stop running. Computer running really slow.
EtreCheck version: 2.1.8 (121)
Report generated March 25, 2015 at 2:34:01 PM PDT
Download EtreCheck from http://etresoft.com/etrecheck
Click the [Click for support] links for help with non-Apple products.
Click the [Click for details] links for more information about that line.
Click the [Adware! - Remove] links for help removing adware.
Hardware Information: ℹ️
    MacBook Pro (13-inch, Early 2011) (Technical Specifications)
    MacBook Pro - model: MacBookPro8,1
    1 2.3 GHz Intel Core i5 CPU: 2-core
    4 GB RAM Upgradeable
        BANK 0/DIMM0
            2 GB DDR3 1333 MHz ok
        BANK 1/DIMM0
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        Color LCD 1440 x 900
System Software: ℹ️
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Disk Information: ℹ️
    Hitachi HTS545032B9A302 disk0 : (320.07 GB)
        EFI (disk0s1) <not mounted> : 210 MB
        Macintosh HD (disk0s2) / : 319.21 GB (73.63 GB free)
        Recovery HD (disk0s3) <not mounted> [Recovery]: 650 MB
    MATSHITADVD-R   UJ-8A8
USB Information: ℹ️
    Apple Inc. FaceTime HD Camera (Built-in)
    Apple Inc. Apple Internal Keyboard / Trackpad
    Apple Inc. BRCM2070 Hub
        Apple Inc. Bluetooth USB Host Controller
    Apple Computer, Inc. IR Receiver
Thunderbolt Information: ℹ️
    Apple Inc. thunderbolt_bus
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Gatekeeper: ℹ️
    Mac App Store and identified developers
Adware: ℹ️
    Geneio [Adware! - Remove]
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    [loaded]    com.google.keystone.agent.plist [Click for support]
    [not loaded]    com.spotify.webhelper.plist [Click for support]
User Login Items: ℹ️
    iTunesHelper    Application (/Applications/iTunes.app/Contents/MacOS/iTunesHelper.app)
    iTunesHelper    UNKNOWN Hidden (missing value)
    readerAppHelper    Application Hidden (/Applications/Reader.app/Contents/Resources/readerAppHelper.app)
    uTorrent    Application (/Applications/uTorrent.app)
    Spotify    UNKNOWN (missing value)
    Google Chrome    Application Hidden (/Applications/Google Chrome.app)
Internet Plug-ins: ℹ️
    FlashPlayer-10.6: Version: 16.0.0.305 - SDK 10.6 [Click for support]
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    Default Browser: Version: 537 - SDK 10.9
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3rd Party Preference Panes: ℹ️
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Time Machine: ℹ️
    Time Machine not configured!
Top Processes by CPU: ℹ️
         5%    WindowServer
         2%    Activity Monitor
         1%    sysmond
         1%    AppleSpell
         0%    ps
Top Processes by Memory: ℹ️
    159 MB    com.apple.IconServicesAgent
    129 MB    Google Chrome
    103 MB    ocspd
    86 MB    Finder
    68 MB    Google Chrome Helper
Virtual Memory Information: ℹ️
    870 MB    Free RAM
    1.49 GB    Active RAM
    885 MB    Inactive RAM
    1.04 GB    Wired RAM
    802 MB    Page-ins
    0 B    Page-outs
Diagnostics Information: ℹ️
    Mar 25, 2015, 02:19:15 PM    /Library/Logs/DiagnosticReports/Spotify_2015-03-25-141915_[redacted].hang
    Mar 25, 2015, 02:06:37 PM    Self test - passed
    Mar 23, 2015, 07:36:46 PM    /Library/Logs/DiagnosticReports/uTorrent_2015-03-23-193646_[redacted].hang

The kernel is using excessive processor cycles. Below are some possible causes for the condition.
Throttling
When it gets high temperature readings from the hardware, or low voltage readings from the battery of a MacBook, the kernel may try to compensate by interrupting the processor(s) to slow them down and reduce power consumption. This condition can be due to:
☞ a buildup of dust on the logic board
☞ high ambient temperature
☞ a worn-out or faulty battery in a portable
☞ the malfunction of a cooling fan, a temperature sensor, a voltage sensor, or some other internal component
Note that if the problem is caused by a sensor, there may be no actual overheating or undervoltage.
If the computer is portable, test with and without the AC adapter connected. If kernel_task hogs the processor only on AC power, charging is causing the machine to heat up. That behavior may be normal for some models. CPU usage should drop when charging is complete.
Apple Diagnostics or the Apple Hardware Test, though not very reliable, is sometimes able to detect a fault. For more thorough hardware testing, make a "Genius" appointment at an Apple Store, or go to another authorized service provider.
If nothing is wrong with the hardware, then whatever you can do to improve cooling may help.
Installed software
User-installed software that includes a device driver or other kernel code may thrash the kernel. That category includes virtualization software, such as Parallels and VMware, as well as most commercial "anti-virus" products. Some system-monitoring applications, such as "iStat," can also contribute to the problem. You can test for this possibility by completely disabling or removing the software according to the developer's instructions, or starting in safe mode. Note, however, that disabling a system modification without removing it or testing in safe mode may not be as easy as you think.
Corrupt NVRAM or SMC data
Sometimes the problem is cleared up by resetting the NVRAM or the SMC.
External display
Connecting an external LCD display to some MacBook Pro models while the lid is open may cause this issue. If applicable, test by closing the lid or disconnecting the display. You might get better results with a newer LED display.

Unnaturally high cpu and memory usage

Hello.
I have installed WL 6.1 and WL Portal 4.0 on a w2k machine. It has a
800 cpu (I think), and 512 RAM.
What happens is: After server startup, everything is low and nice. But
after a few jsp compilations, the cpu jumps to 100% and stays there,
even after the page has been returned and the browser says "done".
Actually, memory usage isn't that high; the java process is using
about 50 megs of memory. But it has exceeded this a couple of times,
and used 200+ MB.
The database is also running on another machine.
I tried deploying the same application on a locally installed
WL/Portal, and the same thing happened, only with much more memory
usage, about 200 - 250 megs. My machine became useless, and I had to
shut down the server.
What is causing this? Is the server's configuration totally screwed,
or can some code be doing this? Btw, I know I am the only user on this
server...
On other threads here, I have seen people supplying server dumps of
processes etc. How do I see this dump, or what processes within the
server are running?
I am very grateful for any help with this.
Christer

Take a thread dump of the server. You should at least be able to see
what it's doing.
On UNIX, you can send a SIGQUIT. (ie kill -3 the process)
On Windows, you can CTRL-BREAK in the window.
If you search for thread dump on edocs.bea.com, you should see a full
explanation.
Also, these groups can be searched on groups.google.com.
-- Rob
Christer Brinchmann wrote:
Hello.
I have installed WL 6.1 and WL Portal 4.0 on a w2k machine. It has a
800 cpu (I think), and 512 RAM.
What happens is: After server startup, everything is low and nice. But
after a few jsp compilations, the cpu jumps to 100% and stays there,
even after the page has been returned and the browser says "done".
Actually, memory usage isn't that high; the java process is using
about 50 megs of memory. But it has exceeded this a couple of times,
and used 200+ MB.
The database is also running on another machine.
I tried deploying the same application on a locally installed
WL/Portal, and the same thing happened, only with much more memory
usage, about 200 - 250 megs. My machine became useless, and I had to
shut down the server.
What is causing this? Is the server's configuration totally screwed,
or can some code be doing this? Btw, I know I am the only user on this
server...
On other threads here, I have seen people supplying server dumps of
processes etc. How do I see this dump, or what processes within the
server are running?
I am very grateful for any help with this.
Christer

Reader X doesn't run fully, uses 25% CPU and hangs

Whenever I click on a pdf, the Reader starts but it's running fully. It draws the toolbars but not the body. The background is still whatever app is behind it. CPU is about 25% and the Reader is not responding. It hangs. Another pdf reader from another vendor works fine. I installed the latest version.
Using Windows 7 64 bit with SP1.

I have had issues with Adobe Reader X hanging (not responding) due to a conflict between an antivirus program and the Adobe Reader X Protected Mode/Protected Viewer sandbox features.
Adobe has a recent(2012-01-09)KB article http://kb2.adobe.com/cps/860/cpsid_86063.html entitled "Protected Mode troubleshooting". There is a similar article (2011-09-12) http://kb2.adobe.com/cps/901/cpsid_90161.html entitled Protected View troubleshooting.
khwajakhurram replied to my query suggesting unchecking the default Adobe Reader X Preferences >3D & Multimedia> "Enable hardware rendering for legacy video cards" setting and this solves the issues!
What is surprising is that Adobe Reader X's 3D & Multimedia settings report that the alternative preferred renderer modes are either software or DirectX9 .....on a Vista machine with DirectX11.
The video card on this machine is definitely not legacy but a recent quality Nvidia produced card. That is also the case on the other machines with the issue I have reported.
I went a step further and I have found that performance is vastly improved by changing from the default preferred renderer mode of DirectX9 to the alternative Software setting.
http://kb2.adobe.com/cps/860/cpsid_86063.html mentions that "certain configurations of anti-virus software that have not yet white-listed AcroRd32.exe" are "Unsupported configurations for Reader running in Protected Mode". Therefore I have also excluded AcroRd32.exe from virus scanning.
I am now able to use both Adobe Reader X's Protected Mode and Advanced Security without issue and performance is vastly improved. I am certain that your issues will also be improved.

Plugin-container in Firefox 4; High CPU and Graphics Switching Problems and Workaround

I recently upgraded to Firefox 4, and unfortunately, I've had many problems running Firefox under OSX on my Macbook Pro.
The first problem I came across was that Firefox is now hardware accelerated. This should be a good thing, but due to the way Apple has implemented graphics switching, Firefox caused the discreet graphics card to be used (as seen with GFXcardstatus)
To prevent this, I went into preferences, and disabled "Use hardware acceleration where available" under Advanced>General.
But my problems didn't stop there. Now, it seems Firefox has decided to run plugins such as flash under a separate process called plugin-container in order to protect the browser from plugin crashes. This is a good idea (I believe Chrome and Safari do the same), but even with hardware acceleration disabled in Firefox and Flash, plugin-container still triggered the discreet graphics.
This would actually be acceptable if plugin-container was terminated after I navigated away from the page with the flash content, but this is not what happens. Instead, plugin-container keeps using the high-powered GPU until Firefox is closed.
At this point, I thought that I'd try to force the computer to only use integrated graphics (using gfxcardstatus), but then I discovered another problem:
The plugin-container process was using large amounts of CPU time when flash content was visible in the Firefox window. Typically, viewing just a static flash ad would cause plugin-container to use about 60% (in addition to firefox using about 20%, that means 80% total). Obviously, this was a battery life problem.
After all of this I think I found a temporary workaround, but there are clearly problems here that need to be resolved by the Firefox developers. There are many non tech-savvy users who are no doubt experiencing poor battery life from these problems.
'''My Temporary Solution'''
1. Disable hardware acceleration in Firefox in Advanced > General
2. Disable hardware acceleration in Flash by right clicking a flash element, clicking settings, and then unchecking "enable hardware acceleration"
2. In about:config, search for dom.ipc and set all boolean values that appear to false. This will disable Firefox's plugin-container process for all plugins.
(At this point, if you restart Firefox, Flash will not work at all)
3. Set Firefox to 32-bit mode by getting info on Firefox.app and then checking the "Open in 32-bit mode checkbox"
4. Restart Firefox. Flash should be working with reasonable CPU usage (I had something like 20% with static flash ads as opposed to 80% before), plugin-container will be no more, and your Macbook will no longer switch to discreet graphics for Firefox or Flash.
'''UPDATE:''' It seems that firefox still sometimes causes a switch to discreet graphics for certain flash elements (video players mostly). Also, I've still seen some cases where flash elements are using large amounts of the CPU, even when they are not in the current tab.
I hope this was helpful to somebody, and if anyone has a suggestion for how to make this workaround obsolete or better, please respond.

Ive downgraded from FF4 to 3.6 at this point. The CPU usage is out of control on OS X.

High CPU and Hanging iTunes

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