High Fan Noise and 100% CPU usage by Dock

My MacBook Pro 3.06 GHz Intel Core 2 Duo running 10.6.8 just started making a constant fan noise. When I checked the Activity Monitor, it shows my Doc CPU usage as 100%, and my Percent User Usage is about 52% System 2.5% and % Idle is 47%. These numbers are when there is nothing running except Activity Monitor. When I log out and log in as another user, the high fan noise stops, and the CPU usage of the Doc is <1%. I have tried restarting my computer, Rebuilt my Permissions, Emptied the Trash, and Reset the SMC (I think I did it correctly for the MBPro, but the Power Light did not change, and nothing seemed to be any different on my computer.) I think I recently did a recent Apple Update, but I don't know how long ago that was. But it was sometime in the past few days. Does anyone have any idea about what could be going on?
Thanks,
Frank

Frank Moore wrote:
How do I give you the credit. It looks like I only gave you a Helpful credit instead of Correct Answer? The only correct option was in one of my replies under you correct answer. You gave the correct answer.
Oh well, no worries.

Similar Messages

Kernel_task high cpu usage, high fan speed, and low cpu tempterature

Hi,
I've noticed that a lot of people have been having trouble with the kernel_task process, but I couldn't quite find a situation similar to mine (most seem temperature related).
Here is the situation (15' MBP, mid-2010):
- on boot (while the apple logo is shown), the fans speed suddenly jumps, and stays there, even if the computer has been off for a while.
- boot takes a little over a minute, which is considerably slower than what I was used to before today
- when finally started-up, the activity monitors shows kernel_task using between 160-180% of the CPU!
- temperatures are shown to be around 30C, except for the mem controller at 40C (still very low temp), but the fan speed is arround 6000rpm for both fans.
- this happened out of nowhere, as I woke the mpb from sleep this morning.
Since then I've tried:
- multiple reboots
- install all updates
- uninstall flash player (some people where having trouble with that)
- empty the system cache with Onyx (reported as a cause of slow boot)
- reset PRAM
- reset SMC
- put some ice packs under the mpb to cool things even further!
And so far, nothing has worked! I've had this laptop for 1 year, and nothing had ever failed. I upgraded to lion a few weeks ago, and everything had been working fine since the upgrade. This really happened out of nowhere, and none of the many forums I have read could offer a solution, and cals to apple support do not seem to yield better results (though I scheduled a call with them at 9am this morning, we'll see).
Has anyone had a similar set of problems?
I appreciate any help or advice you may have!
Thanks!
-Sebastien

I have the same issue (2.66 2010 MBP Hi-Res Anti Glare.)
I took it to Apple Store Covent Garden, JUST within warranty.
18 days later my machine has a new Main Logic borad, heat sensors, top case, palm rest. etc.
I turned it on.
The fans kicked in. All processors at 50%, big ole kernal task.
I took it back, geniuses rest SMC and tested it under load and it was fine.
weirdly it failed diagnostics at first but then seemed fine
I came home. Fans kicked in...
I took it back. Diagnostics failed heat sensors again
Replaced logic board and heats sensors again, but more carefully this time just in case, tested again.
I took it home. FANS FANS FANS.
Last time I was in the store I was told my machine was fine and had been thoroughly tested.
In mac store, no fans.
I erased hard drive and clean installed Lion
FANS
I replaced hard drive with OCZ SSD, clean LION.
Fans
Software update
SMC
PRAM
permissions
Onyx complete clean/maintenace
FANS/CPU
switched back to Snow Leopard SSD
PRAM SMC ONYX etc.
FANS/CPU
replaced RAM, memtest-ed. fine, FANS
gonna try again but up to nearly 2 months of all my spare time trying to shut this thing up so I can sell it.

Upgrade to 6.5.4 and 100% CPU usage

We recently upgrade a 1.6G Essbase db from 5.0.2p13a to 6.5.4p2 - Windows 2000. We ran the 5.0.2p13a db for 5 years quite successfully and now on 6.5.4 our calcs have improved but our data retrieval has slowed down to a crawl. When user's are extracting data (via excel) our CPU is quickly crawling to 100% usage and staying there - task mgr shows essbase.exe with 100% usage and restarting essbase frees up the CPU. We have 8 logical cpu's and more than enough juice to handle things. We have a source db with a transparent partition to a db that user's access.Our db has tons of dynamic calc's and we turned off the dynamic calc cache and picked up a bit of speed but still not the response times of 5.0.2p13a. We notice some time improvements when hit the source db versus the partition copy but still not getting acceptable response times.Is there an undocumented config setting or anything we're missing that may help us?? We getting frustrated trying to find the slowdown.

Now regarding 5.5 i will put in on VMware , can i have two machines , some HA replication with same license ?
One active , one standby , some database replication on day base level ? or similar ?
Can i use same license ?
I bought from Cisco :
CSACS-5.5-VM-UP-K9
CSACS-5-BASE-LIC
L-CSACS-5-LRG-LIC=

Problem:100 % cpu usage with tcp server dll

Hello,
I am trying to write a dll with labwindows/cvi that allows me to create a TCP Server. This dll is integrated in labview.I created this Dll with example provides by Labwindows/cvi(rtserver.dll).
Description of my problem: when i execute this dll in a "While Loop" in labview,the TCp server wait a connection and 100% cpu usage occurs. However when a client is connect to the server,the CPU is normaly used because the program stop when he meets the timeout of the tcpread() function. I would like to know how i could limit CPU usage when the server is awaiting a client in the labview "While loop".
I know I could use a DELAY() to limit Cpu usage ,but I would like to know if there are any others solutions.
thank you.

i dont know your exact application, but i generally use Q to transfer data to TCP loop in my prgram it helps me in two ways.
1. it automatically restricts the iteration when ther is no data (Less CPU Usage, Less Unnecessary Trafic)
2. Q can eliminate problems arising due to non synchronization of loop
Tushar Jambhekar
[email protected]
Jambhekar Automation Solutions
LabVIEW Consultancy, LabVIEW Training
Rent a LabVIEW Developer, My Blog

High CPU & Memory issues - Excessive and unnecessary CPU usage in Firefox for Windows (see also questions1003966 & 998289)

I am using the latest version of Firefox, 32.0.1, on an HP Pavilion dv7-4141sa laptop computer, running Windows 8.1 Pro 64-bit. There should be more than enough power here to run a browser without any problem, yet the computer is regularly being overloaded by the browser's resource usage.
I am currently measuring typical average CPU usage of 45% - with the browser minimised. That is to say, Firefox is not doing any browser jobs - it is not drawing on the screen - but it is using the most CPU of any process currently running. Why?
I am an ex-software engineer, and my understanding of current application development technology is limited, but I think I can say with some confidence that many techniques and software architectures exist that enable the suspension of program activity, or at least its reduction to a very low bare minimum, when the program is not actually carrying out its design function, which is in this case to draw pictures of website data on a screen.
There is a very serious problem here, one which means that I cannot run Firefox all the time, but have to kill it when I am not actively browsing, otherwise other applications cannot run to their full capacity. This is a great pity, because I have committed a lot of effort to making Firefox my primary web tool. It manages all my many bookmarks, contains my secure password manager (LastPass), manages my web security (via NoScript, AdBlock, and FlashBlock), just for a start.
Before any well-meaning moderators or other commenters start down the usual trail of "have you done this, tried that, disabled the other", I should point out that I have followed all the advice I can find, with no positive outcome. This computer is running a fresh installation of Windows, and a fresh installation of Firefox. At the moment I am running a new test Firefox profile.
The latest version of Adobe Flash, 14.0.0.179, is installed but disabled. When it is enabled and in use, Firefox's CPU usage seems high over longer periods, but overall there is little difference. It doesn't look as though the problem can be laid at Flash's door. A few other add-ins are installed, mainly those mentioned above, and Firefox is skinned with LavaFox v2-Green, but I have previously started from a clean installation, which has made little difference after an initial period during which things seemed to be better. Turning off or disabling various add-ons has made no discernible difference.
Just now I turned Flash on, and after a long period with Firefox minimised, Resource Monitor reported Firefox at 8% average CPU and FlashPlayerPlugin at 0.32%. While running a small video, RM reports FlashPlayerPlugin at about 45% and Firefox at 8%. After the video, Flash went back down to around 0.4%, and after a bit more browsing Firefox went to around 17% minimised. There seems little rhyme or reason here, except that Flash does not seem to be the culprit, although Firefox does seem to consume less when fewer tabs are actually active, as you might expect. I just refreshed more than a dozen tabs, and now Firefox is at 30%, but still not back up to the higher figures. Weird.
The CPU usage does vary a lot around the average, but 30% is still a lot for a program that shouldn't be doing anything above the minimum status maintenance, and still puts it at the top of my Top Process Monitor list. (Right now it's gone back up to 45%, without my using it in any way).
I have Telemetry turned on, so presumably Mozilla is recording some of the relevant data.
This is a very serious fault, which is more or less reproducible and which a lot of people seem to be experiencing. Probably more people have it than realise, because most users will not know anything other than that their computer slows down for some non-obvious reason; they may just think it's something to do with the computer itself, not knowing how to use the Resource Monitor and interpret the results.
Oddly, the problem does not seem to occur when running Firefox under Linux Mint 17, where the response is snappy and the CPU usage ostensibly low; I am going to look at this in more detail shortly.
I am not posting here for advice, but for information and as a form of bug report which hopefully other users will see. It will hopefully spare them a lot of effort and time in trying a lot of recommended "solutions" which will not work. The problem is inherent in the software, and can be solved only by Mozilla.
I am willing to supply any diagnostic data requested; as I said above, I have also turned on "Telemetry". However, I will not be trying out any more reinstallation/new-profile/add-on disable-enable-delete cycles unless I am asked to for very specific reasons. Please do not suggest courses of action which have already been mentioned elsewhere on this forum. I have tried them all.
The situation is very disappointing, but I have confidence that the Firefox developers will pin down the fault eventually and engineer a satisfactory solution that makes it viable to leave Firefox open all the time. Even with that restriction, it's still far better than the alternatives.

I share jmward's frustration. This is not a bug report so much as a request for a badly needed feature, ie the ability to have Firefox be able to tell us which tabs on which windows are eating time so we can target them. There are some very poorly written web pages out there which just plain loop while making no updates or inconsequential updates on the page.
This is not a OS problem; jmward runs Windows and I run Linux but we have the same issue. It is not a question of Firefox plugins or extensions, or even viruses; I have a new, clean Linux install but have the same problem on both my regular Firefox AND on a FRESH install of the latest Firefox (35.0.1) which has *NO* non-default plugins or extensions.
Here is an example of a web page which will eat 100% of one CPU's time:
http://patch.com/massachusetts/arlington/arlington-woman-allegedly-attacks-neighbor-snow-blower-0
I will attach 3 images to back up my claim. All of the images show my dark blue system monitor (gkrellm) superimposed on the web page. The top graph shows CPU time. I have 4 CPUs in my machine, so 25% means the web page is eating 100% of one CPU equivalent.
The first image shows the load of the offending page with elevated CPU usage along with the download net activity on eth0, but the CPU activity does not stop when the download activity is over.
The second images show the steady state 100% CPU equivalent of this page just sitting there apparently doing nothing. It IS, however, doing at least two different things. I know from my regular Firefox where I have "Remove It Permanently" installed that if I remove the the little weather indicator in the upper right of the offending page that CPU utilization drops to about 40% of one CPU equivalent. If I use RIP to remove everything else right down to a bare screen that 40% utilization stays until I delete the tab.
The third image shows the CPU utilization drop to zero when I delete the tab holding the offending page.
Now I will add a note here: If the offending page is NOT the top tab in a window then it stops eating time. The offender will also stop eating time if I minimize the window. However if I have another window up but leave the offender up on top in its window it continues to eat time even tho I am looking at another window. The offender will continue to eat time even if its window is completely covered by another window, and it will also eat time if I switch to another desktop.
I will often have half a dozen windows open, and there are many pages out there which will suck endless CPU time. Unless I want to open up a new tab on each window before I leave it there is likely to be some tab on top eating time uselessly. Get a couple of those going and Firefox becomes sluggish and can even stop responding for many seconds.
I guess I not only want to have Firefox tell us which tabs are eating time, but I would also like it if Firefox would stop giving CPU time to any tab which is not visible because it is covered by some other window and/or it is on a desktop which is currently not showing. If you can stop a tab's CPU usage by reason of tab-not-showing then you should also be able to stop its CPU usage when the window is covered or on the not-top desktop. Indeed is there any reason to not schedule absolute CPU utilization priority to the visible tab on the window with focus and give time to the other tabs only when the visible tab isn't using time?
My final thought on this is that I have had Firefox SO tied up sometimes that I swear their are web pages which are eating time even tho they are not the top tab. I regret that I do not have an example to show you. But Firefox grinds to a complete halt on a regular basis, and that is not acceptable. I am a programmer with long experience in multi-threaded programs so I *know* there is no reason you cannot do better. If there were another browser around which had the commitment to privacy which Firefox has I would probably switch out of shear annoyance. :-(

Distiller 8 and 9 both locking up, 100 % CPU usage

Not sure if its related, but probably, since it happened right after...I just transferred everything from my quad core mac pro to my new 8-core Mac Pro. Everything went well, but now Distiller 8 starts and then sits and gives the beachball of death, and one of the cores shows 100% cpu usage. (I have that utility that shows memory used, CPU usage, etc.). I hadn't bought Acrobat 9 yet so I downloaded it and installed, and Distiller 9 does the EXACT same thing. The ONLY thing I can call an "error message" is that I can see in the window after it launches is "Error in /Library/Application Support/Adobe PDF/Settings/PDFX4 2007.joboptions:/CheckCompliance out of Range."
That message may have been there whole time, even when it worked, though. I don't know. At any rate, I need distiller working! Any ideas?

Glad to hear all is well. Preference files can cause big problems. Eons
ago, in the 1980s, I used a communications program called Red Ryder. I
loved the program. After it was updated to a new version (it might have
been called White Knight by that time), I started to have terrible
problems. I wrote to their technical support. They couldn't duplicate
the problem. It couldn't happen etc. I eventually got a little hot under
the collar. After all, if I couldn't use my modem, I couldn't check my
email, etc. It turned out to be a problem with my preference file when
converted to the latest version, that was causing the problem. Since
they always started with a new preference file, they couldn't duplicate
the problem that was obvious to me.
...Mike

Recently FireFox often has been causing 100% CPU usage and locks up until it finishes the process (various ones). Clearing cookies/cache didn't help. Any ideas?

Windows 2000 SP4, 1g RAM, Firefox 9.0.1
We keep IE6 and Firefox open simultaneously for 2 different mail accounts. Firefox was always much faster even with 3 or 4 tabs open, but for the past couple of weeks when trying to update a screen the CPU suddenly goes to 100% usage and of course nothing will move until the particular process is finished. Closing one or more tabs does not help. If I close Firefox completely with Task Manager CPU usage goes back down to nil. After restarting Firefox CPU usage may or may not go back up depending upon whether it tries to continue the previous task that was locking it up.
It did not do this with Firefox 3.6 but then again it didn't happen immediately after updating to 9.0.1 either.

100% CPU usage occurred most often toward the end of the working day when busy trying to print on-line postage. We don't have any memory-consuming plugins but according to the knowledge base articles Firefox memory usage can gradually increase during the day even if you do nothing. It seems that may be the problem so we close and restart Firefox more often now as that usually fixes the problem. However, if we get stuck on a particular website update that causes the CPU to to go 100%, we can always start Firefox without previous tabs so the update will stop, or simply use a different browser until we have time to let the computer play games with itself.
So our workaround of restarting Firefox turns out to be the final solution (until we find something better - will post it if we do). Vic

Server 2012R2 Windows backup 100% CPU usage and no backup

Hello!
I have a problem with two VM´s on a HP Proliant ML350p Gen8, that has Windows Server 2012R2 operating system with Hyper-V role installed.
Both VM´s are also 2012R2, one is DC/DNS/FILE/PRINT and the other one is Exchange 2013.
The problem itself is that, when Windows backup (wbengine.exe - Block level backup engine service) inside VM starts, it uses almost maximum CPU resource, so the VM´s CPUs are 100% used. Backup itself is not working, there is no network trafic. Only
way to get rid of 100% CPU usage is to restart the server.
When i start backup manually (Backup once - scheduled backup options), it is working and the CPU usage is around 20-30%.
One VM (DC/DNS/FILE/PRINT) has 2x vCPU and Exchange has 4x vCPU.
The problem started suddenly, the backup were performing slowly and failed.
Backups are scheduled on different time. Host level Hyper-V backup of VM´s works without any problem.
The backup location is Synology DS414 NAS and the servers are set up using iSCSI, for connecting separate backup lun´s for each server.
The Hyper-V host and both VM´s are patched up-to-date. Ofcourse i have tried a lot of restarts, looking event log, VSSADMIN - cannot find any errors...
The network setup:
Hyper-V host has a team of two physical adapters, that is set up with a external virtual switch (shared with management operating system) and used by the VM`s normal network trafic.
Hyper-V host itself is using separte physcial network card, for connecting with iSCSI to Synology NAS.
I tried to set up another physical network card on the host and create a new virtual swich, add extra virtual nic to VM`s and use this for iSCSI traffic for Windows backup and it didnt make things better.
I need to find a solution, because i cannot restart the server every night for the backups to work.

Hi,
There is a similar thread, please change the performance options in WSB from fast to normal:
wbengine.exe taking all CPU
http://social.technet.microsoft.com/Forums/en-US/be5d5743-1ea7-4c26-8072-0c010b47dd9a/wbengineexe-taking-all-cpu?forum=winserveressentials
If the issue still exists, please check if there any error message in the Event Log.
Best Regards,
Mandy
We
are trying to better understand customer views on social support experience, so your participation in this
interview project would be greatly appreciated if you have time.
Thanks for helping make community forums a great place.

Prstat displays PROCESS/NLWP with /0 , but high USR and SYS cpu usage

I'm running prstat on Sol 10u4 sparc and see from time to time one of more processes with high user and kernel cpu usage, The process name is just displayed as " /0". What is this ?
see sample snapshot below:
PID USERNAME USR SYS TRP TFL DFL LCK SLP LAT VCX ICX SCL SIG PROCESS/NLWP
18738 root 18 42 3.5 0.0 0.0 0.0 36 0.5 123 247 15K 0 sort/1
18728 root 10 30 1.0 0.0 0.0 0.0 0.0 59 0 361 16K 0 /0
18737 root 6.8 15 2.1 0.0 0.0 0.0 75 0.2 82 82 5K 0 awk/1
18731 root 5.2 12 1.3 0.0 0.0 0.0 80 1.5 68 0 5K 0 /0
18730 root 4.8 10 1.1 0.0 0.0 0.0 82 1.4 58 58 4K 0 /0
18736 root 4.4 10 1.1 0.0 0.0 0.0 84 0.1 63 0 4K 0 grep/1
18732 root 3.0 11 2.1 0.0 0.0 0.0 0.0 84 0 45 3K 0 head/1
18735 root 4.3 9.2 1.1 0.0 0.0 0.0 85 0.1 57 57 3K 0 grep/1
18729 root 4.3 8.7 1.2 0.0 0.0 0.0 84 1.3 103 51 3K 0 /0
18734 root 3.7 8.9 1.0 0.0 0.0 0.0 86 0.5 52 52 3K 0 grep/1

The slash number format is used to show the number of threads (light weight processes or LWP in Solaris parlance) in a given process (see the header says "PROCESS/NLWP"). I'd guess this is a race condition where prstat finds a process exists and has consumed some CPU, but when it goes to query the data on the process it's already exited so there's no process name and zero threads associated with it. For this to be true and to see this except more than every once in a blue-moon you'd have to have a system that was having processes forked at an amazing rate.
I'd also say this is a bug, but one that you might have a hard time getting an traction on.

Shockwave Flash 11.6.602.168 100% CPU usage

Hi,
Our computer has 100% CPU usage every time we get in websites that utilize Flash, or watch youtube.
Browser: FF 19.0
Flash 11.6.602.168
Computer: HP Pentium 4, 2.8 GHz, 3G memory, up-to-date BIOS and other drivers.
Graphic card: EVGA GeFprce 6200
Windows 7 32 bits
This window is freshly installed, has AVG on. We do not have many software's installed, except MS Office. All fans and CPU are clean. The computer runs fairly fast: we tried opening multiple FF tabs simultaneously, plus Excel, Word, Solitaire etc. without any problems. However, whenever we get into websites with Flash, the CPU uasage goes to 100% and stays there. Memory usage has always been stable, around 30%. We have tried the following steps, but it hasn't gotten better:
- Turned off all applications, opened only one tab with that website.
- Updated all drivers and applications: FF, Flash, Graphic card etc.
- Turned ON and OFF hardware acceleration for both Flash and FF, also tried to turn one On, the other OFF, and vise versa.
- Disabled all add-on's, extensions and Plug-in's, except Flash.
- Uninstalled and reinstall FF and Flash; restarted several times.
- Temporarily turned OFF protected mode.
- Uninstalled FF, Flash, then installed IE 9, then Flash for IE: didn't work.
- Uninstalled IE 9, Flash, then installed IE10 then reinstalled Flash for IE: also didn't work.
- We do not keep browsing history.
Examples of websites that we have had problems with: pbskids.org, barbie.com, and other school websites for kids to do homework or watch youtube.
While in many websites such as CNN.com, yahoo.com, when we opened it, the CPU usage did spike, but came back to 1-5% within 5 seconds.
This computer is for our kids. Do we really need to buy an i5 or i7 computer so the kids can play and do homework? Or is there any other way that we can do?
Thank you

Moving to the Using Flash Player forum, as this isn't specific to the Beta.
In the Youtube video, if you right-click and choose Show Video Info, it will show you whether you're using Hardware Acceleration for both Video Rendering and Video Decoding.
If you're seeing Software Rendering and/or Software Decoding and you're watching a high-def video, it's going to use a ton of CPU.
Do you see similar behavior in other browsers? (Chrome, IE) The Flash Player distributions are actually quite different for each browser. It would be an interesting data point.

HP LaserJet Pro MFP M127fn - DNS issue, hundreds of UDP connections affects my router 100% CPU usage

Hi all,
We've bought about ten pieces (HP LaserJet Pro MFP M127fn), tested only one the other 9 are waiting for their time to be sent in our branch offices. The MFP works fine, no complains till later that day I noticed that our Mikrotik Router was struguling with high CPU usage, it took me some time to find the issue and it was the new bought MFP. Don't know why but it creates hundreds of UDP connections and almost 100% CPU usage goes to DNS service. As soon as I shutdown the MFP and delete all the connections everything goes back to normal. I've disabled almost all services (HP web service, Ipv6, SNMP, AirPrint, SLP, LPD, WS-Discovery, Bonjour), leaving only Ipv4 but without luck the issue persists. Here are some print screens confirming my saying:
http://i.imgur.com/UiOPSiu.jpg
http://i.imgur.com/dlgObPb.jpg
http://i.imgur.com/4RmQhot.jpg
http://i.imgur.com/oBuo9UO.jpg
http://i.imgur.com/Zf77V6b.jpg
Don't know if it is the same case but it look like, found this post that ha no answer to the issue: http://h30434.www3.hp.com/t5/Printer-Networking-and-Wireless/New-HP-LaserJet-Pro-MFP-M127fw-network-...
Why does this happen? And how to solve my issue? Thank you in advance.

Hi @EugenX ,
I have brought your issue to the attention of an appropriate team within HP. They will likely request information from you in order to look up your case details or product serial number. Please look for a private message from an identified HP contact. Additionally, keep in mind not to publicly post serial numbers and case details.
If you are unfamiliar with how the Forum's private message capability works, this Post has instructions.
Thank You.
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!
Gemini02
I work on behalf of HP

Why screensaver always causes my macbook 100% cpu usage

screensaver always causes my macbook 100% cpu usage, my mac is ok when i use it, but when i leave it once the screensaver starts to run, the cpu fan start to rock and roll my desk which seems the cpu usage achieve 100%, it will be ok once it come back from screensaver, can someone help me on that? Thank you very much!!!!

Resetting an Apple portable's System Management Controller (SMC)
http://docs.info.apple.com/article.html?artnum=2238

100% CPU usage when writing to disk

Hi.
I have an Athlon XP 2000+ with 768 MB RAM, a SATA disk, formated to ntfs (running XP) and a IDE disk running Arch (ext3, KDE).
When I copy a big file, the CPU usage stucks to 100% . Doesn't matter the disk I write to or from. The CPU usage is always 100%.
My maximum writing speeds are:
ntfs-3g-->ext3 max ~30 MB/sec
ext3-->ext3 max ~28 MB/sec
ext3-->ntfs-3g max ~15MB/sec
ntfs-3g-->ntfs-3g max ~15 MB/sec
I understand that writing to ext3 is much faster because it is a native linux fs, but I cant understand why the high CPU usage.
While coping, ksysguard shows that the progress with the higher system% is kio_file when coping ext3-->ext3, or kio_file and ntfs-3g, when coping from or to a ntfs disk.
The problem is not with the CPU, in windows the writing speed is higher and the CPU usage is much lower. So I thing this is an Arch configuration problem but don't know where exactly to look. Searched the forum but didnt find any solution.
Any ideas? Anyone with similar problems?
Last edited by matersci (2007-09-09 22:37:00)

with hdparm -I /dev/sda I get:
hdparm -I /dev/sda
/dev/sda:
ATA device, with non-removable media
Model Number: Maxtor 6L200M0
Serial Number: L41ZFT2C
Firmware Revision: BACE1G10
Standards:
Used: ATA/ATAPI-7 T13 1532D revision 0
Supported: 7 6 5 4
Configuration:
Logical max current
cylinders 16383 16383
heads 16 16
sectors/track 63 63
CHS current addressable sectors: 16514064
LBA user addressable sectors: 268435455
LBA48 user addressable sectors: 398297088
device size with M = 1024*1024: 194481 MBytes
device size with M = 1000*1000: 203928 MBytes (203 GB)
Capabilities:
LBA, IORDY(can be disabled)
Queue depth: 32
Standby timer values: spec'd by Standard, no device specific minimum
R/W multiple sector transfer: Max = 16 Current = 16
Advanced power management level: unknown setting (0x0000)
Recommended acoustic management value: 192, current value: 254
DMA: mdma0 mdma1 mdma2 udma0 udma1 udma2 udma3 udma4 udma5 *udma6
Cycle time: min=120ns recommended=120ns
PIO: pio0 pio1 pio2 pio3 pio4
Cycle time: no flow control=120ns IORDY flow control=120ns
Commands/features:
Enabled Supported:
* SMART feature set
Security Mode feature set
* Power Management feature set
* Write cache
* Look-ahead
* Host Protected Area feature set
* WRITE_VERIFY command
* WRITE_BUFFER command
* READ_BUFFER command
* NOP cmd
* DOWNLOAD_MICROCODE
Advanced Power Management feature set
SET_MAX security extension
* Automatic Acoustic Management feature set
* 48-bit Address feature set
* Device Configuration Overlay feature set
* Mandatory FLUSH_CACHE
* FLUSH_CACHE_EXT
* SMART error logging
* SMART self-test
Media Card Pass-Through
* General Purpose Logging feature set
* WRITE_{DMA|MULTIPLE}_FUA_EXT
* URG for READ_STREAM[_DMA]_EXT
* URG for WRITE_STREAM[_DMA]_EXT
* SATA-I signaling speed (1.5Gb/s)
* Native Command Queueing (NCQ)
Software settings preservation
* SMART Command Transport (SCT) feature set
* SCT Data Tables (AC5)
Security:
Master password revision code = 65534
supported
not enabled
not locked
not frozen
not expired: security count
not supported: enhanced erase
Checksum: correct
It says ATA device, with non-removable media but this is a SATA disk!
Also,
# hdparm -t /dev/sda
/dev/sda:
Timing buffered disk reads: 166 MB in 3.01 seconds = 55.23 MB/sec (SATA Disk)
and
# hdparm -t /dev/hdb
/dev/hdb:
Timing buffered disk reads: 176 MB in 3.02 seconds = 58.26 MB/sec (IDE Disk)
hdprm says dma is on for the ide disk, but says nothing about dma for the SATA.
I think the problem is because the kernel recognize the SATA disk as IDE.
Last edited by matersci (2007-09-19 20:24:10)

100% CPU Usage caused by HMI

Hi everybody:
I'm working with LabVIEW DSC 8.2.1 in a system that monitors many variables of a plant, such a typical SCADA system. For this reason, the use of the graphic tools is highly used on the development of this system. Everything works fine, but I have only one problem.... the usage of the CPU.
When I am working on the development system I (not the executable) I start the application and after the variables are initialized and every process has started and are running , the CPU usage is raised around 90 - 100%. After a few days investigating the reason of this, I realized thay when I change the view on the screen to another view, for example the block diagram of the application, while the application is still running, the CPU usage goes around 15 - 25%. I've tried these many times changing the view from Front panel to Block Diagram and viceversa and the result is always the same: Front Panel= around 100%; Block diagram or another view (other applications MMIs, or Block Diagrams, etc.)= around 20%.
Another thing that I realized is that the other view (different to front panel) has to fill the entire screen to work the way I'm telling before.
When I build and run the executable, the usage of the CPU is the same... (around 100%), but I can't see any other application, because the application built is the shell of the OS, so no other views are available.
I don't know if there's some other consideration to take into account about the HMI when creating an application, and I'll appreciate very much your help.
Thanks in advance!
Ignacio von Unger

From http://100cpuusage.blogspot.com/
100 Percent CPU Usage when you run programs after you install Windows XP Service Pack 2
CPU Usage 100% Symptoms
When you run some programs, the CPU Usage meter in Task Manager may indicate CPU Usage 100%. When CPU utilization reaches 100 percent, programs will run very slowly or stop responding (hang) and your computer is freezing or crashing.
Noteress CTRL+ALT+DEL to view CPU utilization, click Task Manager, and then click the Performance tab.
These symptoms occur after you install Microsoft Windows XP Service Pack 2 (SP2).
CPU Usage 100% Cause
These problem occurs because of the user interface code that is included in Windows XP SP2. The high CPU utilization is caused by the additional overhead that occurs when the IsWindow function is called by the user interface code.
RESOLUTION
Hotfix information
A supported hotfix is now available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next service pack that contains this hotfix.
To resolve this problem, submit a request to Microsoft Online Customer Services to obtain the hotfix. To submit an online request to obtain the hotfix, visit the following Microsoft Web site:
http://go.microsoft.com/?linkid=6294451
Note If additional issues occur or any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. To create a separate service request, visit the following Microsoft Web site:
http://support.microsoft.com/contactus/?ws=support (http://support.microsoft.com/contactus/?ws=support)
Prerequisites
To apply this hotfix, you must have Windows XP SP2 installed.
Restart requirement
You must restart the computer after you apply this hotfix.
Hotfix replacement information
This hotfix does not replace any other hotfixes.
File information
The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel. Date Time Version Size File name
30-Mar-2005 19:53 5.1.2600.2643 577,024 User32.dll
30-Mar-2005 01:30 5.1.2600.2643 1,836,544 Win32k.sys
if you still do not know how to Fix CPU Usage 100%?
I suggest you try targeted software - registry cleaner to fix cpu usage 100%
Because there are many cases causing high cpu utilization.
1. If you do a lot of web surfing and are concerned about spyware, adware infecting your machine, they will cause system crashes and CPU utilization reaches 100 percent. Some good registry cleaner has the function of spyware & adware removal.
2. You install many beta version of the software, Drivers are not certified, which resulted in many errors, you get high cpu usage.
3.100% CPU Usage while you use Internet Explorer
4. many unneed Startup Program.
5.Others PC Errors. - DLL errors, runtime errors, Windows-Installer Errors, Windows Startup Errors,paths Broken DLLs, OCX, and ActiveX Components all will cause 100% cpu usage. Your PC will run very slowly.
Registry cleaner can do a complete scan of your entire file system and registry in under 2 minutes! Fix High Cpu Usage. Improve PC Speed By Up to 70%!
http://www.100-cpu-usage.com/ suggest you to download registry cleaner to fix 100% cpu usage too.
PCErrorsfixer.com - Top 3 Windows Registry Cleaners, Improve PC Performance,5 Star Rated. Fix 100% CPU Usage, Runtime Error, DLL Error,Windows Startup Errors,Internet Explorer Errors, Speed Up your slow PC.

Microsoft.Exchange.AddressBook.Service.exe 100% CPU Usage

Hi,
We have an exchange server 2010 and the Microsoft.Exchange.AddressBook.Service.exe used 100% CPU Usage suddenly. However, after rebooting the server, the CPU Usage of the above .exe is back to normal. Client cannot connect to the exchange server during
the high CPU Usage of the above .exe.
Any ideas for the above problems? Thank You.

Hi
Microsoft.Exchange.AddressBook.Service.exe is related to OAB function.
Maybe mobile or client fails to download will cause this problem.
What was the fix for this?

High Fan Noise and 100% CPU usage by Dock

Similar Messages

Maybe you are looking for