MacBook Air :: Kernel_task At 130 Cpu Usage Too High?
Apr 8, 2009
My MBA (Ver A 1.6) just started getting the "sluggish" symptoms. Started noticing that my CPU gets stuck at 90~100% after about 30 min of use, since about a week ago. I keep restarting the computer and after about 30 min, my MBA becomes very sluggish and iStat shows both CPU bars all the way to about 100%.
When this happens, the activity monitor shows the kernel_task at 125~130. This is too high, right? If it is, what's causing this? I can't imagine that any of the programs that I regularly use will cause this.
I've noticed that my macbook pro has been using a lot of RAM. I haven't really witnessed a slowdown on my computer b/c of any sort of shortage of RAM but I was just curious if this was typical (since this is my first mac). I have 4 GB of RAM and I often find myself with around 1-1.5 GB of free + inactive RAM. I had a linux system with 3 GB RAM before and it used between 1-1.8 GB of RAM and it seems like this system is using around 2.5-3 GB (active + wired). However, various OS X laptops in the past have functioned really well in the past with 2 GB and even 1 GB of RAM right? Is OS X just putting more processes in my RAM to speed up my system because more RAM is available OR does snow leopard just have high memory consumption?
I believe there might be something wrong with my MacBook Pro-It's a late 2008 one, mid configuration. Intel C2D 2.4 Ghz, 2 graphics card, 2GB RAM, ... (Using SL)
I usually find myself using up most of the RAM, with 96MB of RAM left right now, and sometimes when using Photoshop, up to 15MB. My CPU usage is quite high, with Chrome using 17% + other Chrome processes.
I'm only opening up 13 active tabs with 12 pinned and disabled tabs; Is the CPU usage too high?
The HD crashed about 2 years ago, and since the replacement (TOSHIBA MK6034GSX 60GB) the CPU will go very hot 80+C and the fan going to 6200rpm if visiting some internet pages. Normally a problem if (when) the kids are playing free online games or visiting youtube or similar. Made a screenshot, notice CPU usage around 112%, smartfan showing 70C and 6200rpm. I have taken the mac physically apart and cleaned the cooling duct and applyed new thermal paste. Didn't help. It drives me crazy, I hate noisy computers.
I will be running MS Excel, preview, firefox, and activity monitor. All of a sudden my Activity monitor says that there is about % User of 50% and the fan will start running. I cannot find what program is making it run this high. I quit every program and it gets stuck on this until I restart the computer. I have done this about 3 times and it always comes back. None of the programs are registering high CPU usage. My last computer had an overheating problem where the fan was always on and that was part of the reason I switched to Macs - really hoping that issues doesn't follow me from Windows to Mac.
I bought one of these: [URL] and decided to do an experiment, now on standby (Laptop cover closed) it consumes 1.432 per night (8 hours). Laptop on standby, Cover Open but Display in Sleep mode for 8 hours costs 4.731 per day. So that means per month on standby at night, my Macbook costs 44.392. This can't be right? Because if it is, I might have to turn it off at night from now on.
I just bought my first mac (2010 13 inch base model) and i was looking in Activity Monitor when i noticed that my free system memory is around 15-20mb. Is this normal? The only things i have running is chrome, itunes, and steam. Would these programs eat up memory? if this is a stupid question please forgive me!!!!
I just installed windows 7 onto my mac with bootcamp. And I noticed that I have high CPU usage everytime when I watch a video from youtube or nba. My cpu usage would jump from 30% to 98% momentarily. What is the cause of this?
My computer has been running incredibly slow lately. I think it has to do with the disk usage as every time it has to access the disk, it slows to a crawl. I've had a huge amount of beach balling, especially when loading a new App or a new page in Safari.
Here is a picture of the disk usage. Does this look normal? Does anyone know what the problem could be?
I only started noticing my fan running a bit on the fast side this evening after installing the new Safari 4.0.5 update. I looked at iStat Menus for temp and CPU. And I was seeing about 190 degrees F for CPU temp with lid closed running ext display. Also there was a constant usage of the cpu (about 30% User and 20% System). There's not one particular process I can see in Activity Monitor that acting out of the ordinary and using a lot of CPU. Just stuff like coreservicesd, WindowServer, launchd that are shuffling around and using about 1-4% of CPU.I ran repair disk permissions and verify disk. Verify Disk found errors and said I need to repair my Macintosh HD, which I have now done successfully.
Just wondering if this is normal? Almost 30gb of VM in use? I'm encoding one of my DVDs and Handbrake is only using about 90mb of real memory while a bunch of background apps are using about 600-800mb of VM memory. Yesterday I encoded a DVD in like 20 minutes. I did a restart to refresh my memory but it's taken like over 2 hours of encoding and it's not done yet.
I've searched all over the internet but have yet to come across an answer. I love my Mac, but why is it that when I play a video in a web browser on my MacBook, (be it Flash, QuickTime, etc.) my CPU usage is anywhere from 60-80%, yet when I play the same video on a laptop running Windows, the CPU usage is always in the single digits?
I realize that video takes a toll on the CPU with integrated video cards, but it doesn't seem to have the same effect on Windows based laptops with integrated video cards. Is the CPU usage possibly just calculated differently, or is the Mac architecture somehow just really inefficient at this?
Whenever I start iChat on my new mini, it instantly spikes up the CPU usage and just sits there high. Activity Monitor says it's around 97%. I'm not doing anything in it; just starting the app gets it up there, and the only way to get it to go down again is to close the app. It doesn't seem to make a difference whether I'm online or off.
A few days ago I found that launchd was constantly using around 14% of my CPU (via iStat), which drastically lowered my battery life and caused my CPU to reach 75 degrees Celsius and higher. Initially I thought that SL just needed to do something, so I ignored it. But it has persisted for a few days now, so I decided to do something about it.
I checked the Console and nothing appeared to be repeating itself, so what I did was use MainMenu to perform a batch of system maintenance tasks, and then left my Mac on overnight to see what Console would report. Besides hourly instances of "kernel" running "iCalHelper" and "SubmitDiagInfo", there was nothing else.
However, launchd lowered its CPU usage to about 3%, but it is still constant and my CPU is still at a constant 40-50%. Activity Monitor says the following processes are (constantly) taking only 1-4% of the CPU: coreservicesd launchd mds WindowServer disnoted activitymonitord ...and others The CPU is reported as 35% User and 20% System. But I am not running anything besides Activity Monitor.
I've had my unibody Macbook since October. Recently I installed a few game apps including Sims 3. The problem is that when I try to play a game, it shows that my CPU usage is around the 100 range, the temperature is around 150 degrees, and the fan is around an average of 4000 rpm. It gets annoying cause you can hear the fan making a loud noise, I'm not sure if its my laptop or some other problem.
After standby mode my iMac 2011 with 10.7.3 seems to run corrupt with the kernel and activitymonitord tasks. CPU usage on one core runs to 100% only by scrolling fast in a window (finder, firefox, activity window). It happend without any system adjustment nor on any update or new software. Had the same issue months ago. Helped to went back to 10.7.2 and upraded again to 7.3 via combo update. System is after standby not usable, have to start system new as work around. Found same issue with other users on the web, but no solution.
Info: iMac (21.5-inch Mid 2011), Mac OS X (10.7.3)
I have white macbook c2duo 2GHz.After last iTunes update it still consumes about 60% of CPU whe running. If I say running i mean that it's not playing any music. Library Sharing is off. I was trying to find out something but i had no luck. Only I can say is that the same thing is occuring on my friend "Old" Macbook Pro (intel c2duo) but not on any iMac or Unibody Macbook i have seen.
I bought one of the new-gen iMacs last month--my first Mac! My computer will often start making a low-droning noise, and it sounds like a fan. I have iStat, and usually during this time it will say that my Optical Drive and CPU Fan are both running at around 4000rpm. This happens when there is very little CPU usage too. It's happening right now, and I only have firefox running.
I just noticed that my CPU usage in windows 7 running in boot camp on my i5 iMac i newer lower than 30%... One core is almost at max, one is at a third of max, and the two last cores are idle. I've cleaned out in the "processes" tab in Task Manager, so that only the vital functions are running. Does it really take up so much juice to run Windows in boot camp?
Currently, I have a 13" late 2011 MacBook Pro with 4gb of RAM. Right now, I only have 15mb of RAM free, and for some reason the rest is being used by an unknown process. I'll include a screenshot below
My wife has an Intel Core 2 Duo Macbook with Leopard 10.5.8. We've run the software update. We've run repair disk permissions. We've restarted the computer. But despite all of that, her virtual memory usage is really high compared to my computer. Each process is using from approximately 600 - 1100 MB of virtual memory. She has 12 GB of free space on her hard drive, but her computer has been running slower lately and has had the low startup disk space warning.
Info: MacBook (13-inch Aluminum Late 2008), Mac OS X (10.5.8)
i was playing Diablo3 when i suddenly experienced heavy, unusual lag. I tried to reboot to see if that could even things out. No success. It took longer then usual to boot up, and when i finally reached the login-windows asking for password, it wouldent react to my typing and clicking for about 5 minutes. I could move around the mouse and the keyboard did get signal (it un-dimmed the scren when i pushed any key after letting it dim over time).
Then i tried to do a clean install of OS X Snow Leopard (formating the drive and then install). After longer then usual,reached the "choose your language" window. This window too had extreem long respond-time. I managed to start the installation but it stopped at 33minutes remaining, giving me the "Install Failed" window. this told me "Mac OS X could not be installed on your computer. The installer could not copy the necessary support fies. Click restart to restart your computer and try again.". I tried it again but it gave me the same result.
it made me believe the hardware was the problem. First i swapped the Optical Drive with an older vrsion MacBook (2008), this gave me the same install-problem (stopped at 33mins left) Then i swapped HDD with the older MacBook. It managed to boot and start "normally" with exactly the same problems as the original HDD. The first thing that gets to my mind is that something might be fried inside the computer.
I restored the original HDD with TimeMachine (needless to say i still got the problem). I'm in the middle of my exam-papers, so its reaelly annoying its happening now.I also tried installing OS X SL using an external HDD with an image of the installer disk made in disk utilities, but this only gives me "kernel error" during booting (the annoying dimmed screen with a black box in the middle telling you to restart).
Today i took a look in the Activity Monitor and it shows the CPU acting strange, spending 100-120% on kernel_task ALL the time (see added picture).Is something wrong with the CPU? Is it possible to fry only one core in a CPU leaving the others intact?I have different components available for change as long as they match each other (Macbook pro 2010 and MacBook 2008).
I recently did a Lion clean install and since then im having this wierd issue..I already saw some cases that the kernel_task was eating too much cpu but that was random and caused by flash player.. mine is different.. it only happens when i have less than 5% battery and it stops when i connect the magsafe. I already tried PRAM reset.. already tried uninstall flash player but with no luck. What can i do ?
I have a 27" iMac running OSX Lion 10.7.3. Some time in the last 2-3 weeks, it has started to getting into a state where the kernel_task is using 100% of one CPU constantly. When this happens, it also kills my Internet connection and I cannot use the browser, email, Skype, Twitter, etc. I have tried putting it to sleep, closing all programs that are open checked the process list with ps to see if I could find anything weird, but it still keeps happening.
I have to restart the computer whenever this happens. It might happen again in a couple of minutes or not for several hours, but happen it does. I thought it might be Chrome or Mail for a while, but it happened today when those were not running.