High CPU usage when downloading from ITunes Match

When attempting to download matched songs from ITunes Match, ITunes utilization spikes to over 70% and makes it almost impossible to do any other function on the computer. Eventually ITunes fails to respond. I have tried several remedies including reseting winsock. Is there any other options I should try?

Hiya,
could it have something to do with the write speed/ cache/ram? On a "slow" disk, or one that is nearly full or one that is partitioned, it will take a great deal more ram and cache to "digest" the faster download and write it onto disk. I tend to do downloads to a separate drive. Have you got one? and can you repeat the high CPU usage when downloading / saving to the external drive? I note your drive might have 5,400 rpm, with "just" 8mB cache and 320 GB (quite a few SATA's have 7,200 rpm and 32 mB cache).
NB: If anything, I found SL more efficient, especially on my 4 year old Macbook, which is running much faster and has got more responsive after installation of (full version of) SL.
Message was edited by: Alexandre

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High CPU usage when downloading Files

Hi there,
i noticed somethign strage when I download file off the internet or intranet. As soon as my download speed surpasses 1MB/s the CPU usage increases. To be exact the process kernel_task.
For example:
2,5 MB/s -> ~30%
10 MB/s -> ~60-70%
10+ MB/s -> ~80%
This is really annoying and I have now clue how to fix this. The Harddrive is a SAMSUNG HM320JI with a Journaled HFS+ partition. No Virus Scanner or anything. Also just reinstalled Snow Leopard yesterday.
Hope someone can give me some useful information how to fix this.

Hiya,
could it have something to do with the write speed/ cache/ram? On a "slow" disk, or one that is nearly full or one that is partitioned, it will take a great deal more ram and cache to "digest" the faster download and write it onto disk. I tend to do downloads to a separate drive. Have you got one? and can you repeat the high CPU usage when downloading / saving to the external drive? I note your drive might have 5,400 rpm, with "just" 8mB cache and 320 GB (quite a few SATA's have 7,200 rpm and 32 mB cache).
NB: If anything, I found SL more efficient, especially on my 4 year old Macbook, which is running much faster and has got more responsive after installation of (full version of) SL.
Message was edited by: Alexandre

HT204406 Getting "Unknown Error" Check internet connection when downloading from itunes match

I recently uploaded all of my songs from my PC to the itunes match cloud. I was able to sucessfully download a few songs last night. Now when I try to download the songs I get an "unknown" error and to check my internet connection. I have confirmed that my internet connection is working because I am able to access outside websites. I'm not sure where to go from here. any help is greatly appreciated!
Thank you,

There are many versions of this song in the UK Store. If you contact Apple from the iTunes section of the website (make sure you have the purchase details to hand), they should credit you so you can purchase another version of the song.
When you contact them, mention the problem file so they know to pull it.

High CPU usage when editing large MXML files

I am using Flash Builder 4.5 Plug-in on OSX. When I have a large MXML file open, Eclipse will consume 100% of the CPU as long as that file is open, even if I am not doing anything. If I close that editor the CPU usage goes back down. I've seen this in Flash Builder standalone as well as the plugin. Is there a workaround to stop this CPU usage problem?
Thanks

Hiya,
could it have something to do with the write speed/ cache/ram? On a "slow" disk, or one that is nearly full or one that is partitioned, it will take a great deal more ram and cache to "digest" the faster download and write it onto disk. I tend to do downloads to a separate drive. Have you got one? and can you repeat the high CPU usage when downloading / saving to the external drive? I note your drive might have 5,400 rpm, with "just" 8mB cache and 320 GB (quite a few SATA's have 7,200 rpm and 32 mB cache).
NB: If anything, I found SL more efficient, especially on my 4 year old Macbook, which is running much faster and has got more responsive after installation of (full version of) SL.
Message was edited by: Alexandre

ITunes 10.6 has High CPU Usage when switched to Mini Player

iTunes has high CPU usage when switched to mini player. The CPU usage goes to 80-100% when the next song is played in Mini Player. iTunes then stays at high CPU usage.
Upon exiting mini player the CPU usage will drop back to the normal 0-5% levels.
This only happens when playing from the main music library; which my library is at 7089 items, 42.04 GB.
When playing from a smaller playlist such as a smart playlist with about 15 songs in it for example, the CPU usage stays low/normal.

Do you have any better luck with that if you update to iTunes 10.6.1.7?
From the notes for the release:
iTunes 10.6.1 provides a number of improvements, including:
• Fixes several issues that may cause iTunes to unexpectedly quit while playing videos, changing artwork size in Grid view and syncing photos to devices.
• Addresses an issue where some iTunes interface elements are incorrectly described by VoiceOver and WindowEyes.
• Fixes a problem where iTunes may become unresponsive while syncing iPod nano or iPod shuffle.
• Resolves an ordering problem while browsing TV episodes in your iTunes library on Apple TV.
http://www.apple.com/itunes/download/

Google Earth Plugin and LabVIEW: High CPU usage when adding placemarks

Hi,
I posted this question on stackoverflow earlier this week but feel it might be better suited to the LabVIEW community specifically so I'm reposting here:
I'm writing an application which uses the Google Earth Plugin to display events on the globe. Each event is a single point kml placemark with an icon which is a 3kb png file. Placemarks are uploaded to the plugin as they are received by the software. I am experiencing increasing CPU usage with the number of placemarks that are added.
I have tested displaying a new placemark every second and running until the software running the plugin completely froze (graph attached). The GEPlugin (green trace) stopped responding (i.e. the globe did not respond to the mouse) at around 1200 placemarks added and CPU usage was at ~30%. When the software itself (red trace) froze the plugin was using around 50% CPU and ~3700 placemarks had been added). After the freeze, no new placemarks were added which caused the software to respond (but not the plugin) so I could clear all the placemarks. After the placemarks were cleared from the globe, the CPU usage of the plugin returned to around 5% CPU.
So what I've seen is that GEPlugin CPU usage increases linearly with each kml placemark added. Is this the expected behaviour/ a normal limitation of the plugin? If not is there a more efficient way of adding many placemarks to the globe?
I am using GEPlugin version 7.1.1.1580 (API version 1.010) and LabVIEW 12.0f3
Please see the test results attached. Any input greatly appreciated!
Original stackoverflow post:
http://stackoverflow.com/questions/20994323/google-earth-plugin-with-labview-high-cpu-usage-when-add...
Attachments:
Performance Log 020114_095115.png ‏82 KB

Hello,
I have had a look at your graphs and understood what you are trying to do. To me it seems that as the image gets more complex it gets harde to render which wold likely cause increase in CPU usage resulting in the freeze. I would suggest you try running the program on anoher computer to check on the RAM front of things. If this is a limitation of the GE Plugin then unfortunately I can not do much to help, but if you think this is a problem coming from your LabVIEW code then you can post your code here and I can take a look.

HT204406 Uploaded CD last night. I see it in itunes match. However can only download some of the songs. Few have the Icon to download from Itunes Match, however it is not able to be clicked on. It's a lighter icon then other download ones.

I uploaded a CD last night. I see it in my ituned match on my work cpu. I can download 6 of the 10 songs. The other 4 have an Icon to download from Itunes Match, however it is not able to be clicked on. // See Pearl Jam Ten. I can download almost half the songs. The others remaining I cannot though they say they are available. I've reset the cache, I've closed and reopened Itunes, I have even turned MATCH off and then back on. Nothing is working. Please help. Also the song will not play. If I start the album, it skips over these songs.

The number of Songs that 'matched' is simply a function of the current iTunes Match service process. It is not unusual to have multiple Songs in an otherwise perfectly matched album be uploaded - often it is very possible to find the album in the iTunes Store.
The Artwork does tend to reappear for many over a few days / weeks - however, if your library backup has all Artwork present it would be wise to save the Album Art separately and reapply to Albums not showing art work in the library grid view.
Many of the other performance issues you mention are not typical - though during the past working week or so the Apple Infrastructure has been very heavily loaded with multiples countries having service go-live symultaneously.

High CPU usage when graphics card is put at work

I have a 13inch Air with 2GB RAM and 256GB with Windows 7 Ultimate 64bit. All possible updates have been installed.
I noticed some tearing when trying to move program windows across the screen so I started checking the CPU usage. I saw that it is spiking to 25-35% when moving a window across the screen.When you drag down a window you can see the different copies of the top bar across the screen. Not smooth at all like on a standard PC windows system. Same issue when scrolling through webpages which spikes the cpu
I also noticed a high cpu usage when playing mkv files 25-30% while on an Atom HTPC i get a lower load playing the same file. The Air should be faster than an atom with a nvidia 9400m when playing video files.
I already tried updating the nvidia files to the latest version on their site by hacking the driver inf but this did not resolve the issue.
Has anyone experienced the same or know what could be causing the beavior?
Many thanks

Maybe my initial post was not clear so let me add some clarifications.
I have the problem with Aero disabled
I have the problem on the Apple site which does not have any flash content.
I have already hacked the lastest nvidia drivers to get them on my system which did not change anything. Can you provide a link to some other 'supported' beta drivers?
I am using the new 13 inch air so it has the newer graphics card so I would expect it to be faster than an old HTPC with a 9400m in it. I wasn't stating that my Air had a 9400m.
It would be great if someone you also do the test to check the cpu load:
- when playing a 720 mkv
- when dragging a window across the screen
Just open task manager and see if the CPU spikes.
Many thanks!

HT4915 Mass download from iTunes Match to new Mac Mini

Is there a way to mass download from iTunes Match to new Mac Mini without having to click on the download icon for each song?

Welcome to the Apple Community.
Select them all and use ctrl-click to bring up the contextual menu with the download option in it.

When downloading from iTunes I received this message: unkown error 12001

when downloading from iTunes I received this message: unkown error 12001.
Anyone knows what this is and how to fix it?

Perhaps try the iTunes Store loads partially or returns "Error 306" or "Error 10054" section in the Specific Conditions and Alert Messages: (Mac OS X / Windows) section of the following document:
iTunes: Advanced iTunes Store troubleshooting

Only partial songs are downloaded from Itunes Match

Only partial songs are downloaded from Itunes Match, they stop and go on to the next song. Any ideas?

I too had this issue. On the Downloads screen in iTunes simply uncheck the box at the bottom left that says "Allow simultaneous downloads". Next, delete any of the affected songs from your library and then re-download them from iCloud and songs should no longer abruptly cutoff or jump to the next song.

High CPU usage when updating or instlling s/w

When updating Win8 or installing MS Office system slows down and has to run all night to make any progress. Task Manager shows "System" using 49%. "go to process" shows "NT Kernel & System". The system was bought with Win7 and is now double booting both 7 & 8. Win 8 partition has 500 GB.
This question was solved.
View Solution.

Hello @Dan-44,
Welcome to the HP Forums, I hope you enjoy your experience! To help you get the most out of the HP Forums I would like to direct your attention to the HP Forums Guide First Time Here? Learn How to Post and More.
I have read your post on how your computer is displaying a high CPU usage when installing updates or other software. I would be happy to assist you in this matter!
What other programs are in use when these updates take place? How full is your computer's Local Disk hard drive? In the meantime, I recommend following the steps in this document on Resolving Slow System Performance (Windows 8). This should help improve the speed and efficiency of your operating system.
Please re-post with the results of your troubleshooting, as well as the requested information above. I look forward to your reply!
Regards
MechPilot
I work on behalf of HP
Please click “Accept as Solution ” if you feel my post solved your issue, it will help others find the solution.
Click the “Kudos, Thumbs Up" on the right to say “Thanks” for helping!

HT204406 Downloading from iTunes Match.

I am trying to download one of my albums from iTunes Match, and only some of the songs are downloading (yes, I clicked download all). The songs show the circle as if it's going to download, but then the "Cloud" icon reappears, and the download begins with the next song. I have tried deleting the album and starting over, but that doesn't work. Anyone know how to fix this? Happens when I try Cellular Data or just Wifi.
Thanks!
Sean

Yes it will use data on your cellular plan unless connected to wi-fi.

Continual HD activity, high CPU usage when idle

I got my first notebook, a Compaq V2000, a few weeks ago and have Arch set up pretty well on it but I have a few issues. Even when the machine is sitting idle it sounds like the HD is doing a read (or whatever) about every 5 seconds. This only starts after I log into Gnome and stops if I log out.
I tried a couple of things with hdparm:
If I try 'hdparm -y /dev/hda' the drive goes to standby but immediately spins up again.
'hdparm -B 255 /dev/hda' disables APM and stops the cyclic behavior. This would seem to be good but during the 5 second cycle the drive alternates between quiet and noisy and this leaves it in the noisy state.
I tried to determine what might be causing all this disk activity so I edited lilo.conf to remove "acpi=on apm=off" from the "append=" line and in rc.conf I put a ! in front of all modules and daemons and rebooted. I removed the applets from task bar. No change.
I ran top to see if I could tell what was accessing the HD but I'm not knowledgable enough to make much sense of it. I did notice that on my notebook the top summary shows:
CPU: ~30% user, ~10% system, ~60% idle with 'wait' bouncing between 0 and 5%
On my main computer, also running Arch/Gnome, I get
CPU: ~2% user, ~1% system, ~97% idle with 'wait' solid at 0%
On the notebook, if I run hdparm -B 255 /dev/hda the CPU #'s for user and system remain high but the wait # drops to zero and stays there.
I don't think all this HD activity could be good for my machine, and I know I find it very annoying. If anyone could help me stop all the HD accesses and understand the high CPU usage I would appreciate it.

I loaded lsof and frankly it scared me. It listed what looked like a couple hundred files and I didn't know exactly how to use that information.
Then I tried laptop-mode-tools. The man pages didn't sound too promising since it uses, among other things, hdparm, which I already tried with mixed results. I gave it a try anyway and right out of the box, with no configuration, it worked. HD access when idle dropped to essentially none, the drive spins down and the cooling fan runs much less frequently.
So far all I have changed in the config file are the HD idle timeouts. The default of 5 seconds was starting and stopping the HD too often so I changed that to 20 seconds for now.
Whatever laptop-mode did to stop the 5-second HD accesses the effect persists even if I run 'laptop_mode stop' and '/etc/rc.d/laptop-mode stop'. When I get the time I should be able to use 'laptop_mode status' and laptop-mode.conf settings to determine exactly what the magic bullet was.
Thanks, lucke. I never would have tried laptop-mode on my own because I thought it only duplicated functionality that I already had with hdparm and powernowd.

High cpu usage when idle / x230

Hi all,
I have an i5 x230, win8 pro installed on a crucial m4 msata ssd, 16gb of ram. I lately noticed a sharp drop in battery life. I believe this is due by high cpu utilization when idle, which I see from task manager, and shows the System process hovering above 30% cpu utilization. This goes down when I restart, but comes up again after a while, possibly when coming back from sleep.
Does anyone have any idea about this? I tried to search the knowledge base a bit, but nothing came up.
Thanks!
Solved!
Go to Solution.

Indeed it was risdxc64.sys; I used process explorer to find out. I uninstalled the win 8 driver, and installed back the win 7 driver, and CPU usage is normalized.
Thanks for pointing in the right direction!

High CPU usage when downloading from ITunes Match

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