I've installed Process Lasso and in All processes tab, set all affinities to 1-7, meaning that all the processes can be start on all my CPUs except the first one. Yet, there is a huge load on my first CPU.   I personally have no clue what's happening here and really appreciate any help.  My system is:   Intel core i7 - 4720 HQ  2.6 GHz upto 3.6 Windows 10 (64 bit) NVidia GTX 950 M   This screenshot, shows the software's interface. Those 8 green bars on upper right show my CPU usage. Also the column called Rules, indicates the affinities on the processes.       PS: These are screenshots that show the more familiar Task Manager and Resource Monitor. I've sorted all with respect to their CPU usage. Note that the overall CPU usage is just fine (less than 30% most of the time), but in Resource Monitor, same as the Process Lasso, it's obvious that that most of the load is on CPU0 and the others are almost free.  Also I found out that my total CPU usage, is actually more than all my processes altogether! The orange line in Resource Monitor picture, shows the amount of CPU usage of all my processes. (I did the same in safe mode. Orange line, exactly coincides the total usage in safe mode. So I'm suspecting that something is happening in my normal boot.)
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I have noticed that from some time my system is freezing and its probably caused by the high CPU usage which is caused by the system process.  All applications I'm running is the Skype, TeamSpeak and Chrome so it definitely shouldnt eat that amount of CPU.  You can see the problem itself and running processes in the screenshot below:    Sometimes CPU usage is reaching 90%, but the average usage is like 40-65%.  My PC parameters:   Windows 8 (customer preview) Intel Core i3 - 2350M 8 GB RAM   I'd appreciate any help attempt! Regards.  --UPDATE--  As the user below posted a great answer, I have noticed that the process that is eating the most CPU in the system is called Arthurx.sys, simple google tells that it's a TPLink driver (an wifi adapter, I have bought like 2 weeks ago!) drivers has been installed from the Windows MSDN, but also tried to install the drivers from the attached CD, but it doesn't help. From the system start, it is using like 5% of the CPU only, but after 2-4 hours of working it is growing up and reaching 40-60% of the CPU usage.  Device name: TPLink WN722N
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I have a 27'' iMac (Late 2012, OS X 10.9.2) with 8GB RAM. The usage of memory is always above 7GB, even though I don't think I am running that much stuff. This leads to the occasional hanging of a program and occasional feeling of the computer being lagged.  The heaviest thing I am running is a Parallels virtualization of a defunct Windows laptop (for my Windows-only programs; work-related). Then I mostly surf with Chrome (10-20 tabs, some with youtube videos). Of course I have other things opened, like Mail, Evernote and a few more. But I don't think a 8GB RAM computer should be overwhelmed by that. I could be wrong.  I am willing to provide an export of processes from the Activity Monitor. I tried looking into it, of course, and I am running A LOT of small processes (unknown to me) -- system stuff I presume. I am a long-time PC user and I know my way around process management in PCs, but not on Mac.  What do you think? Do I just need more RAM or it doesn't feel like it?  Regards,
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I once had the task of determining the following performance parameters from inside a running application:   Total virtual memory available Virtual memory currently used Virtual memory currently used by my process Total RAM available RAM currently used RAM currently used by my process % CPU currently used % CPU currently used by my process   The code had to run on Windows and Linux. Even though this seems to be a standard task, finding the necessary information in the manuals (WIN32 API, GNU docs) as well as on the Internet took me several days, because there's so much incomplete/incorrect/outdated information on this topic to be found out there.  In order to save others from going through the same trouble, I thought it would be a good idea to collect all the scattered information plus what I found by trial and error here in one place.
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When I execute following command to get cpu usage , I get nice + user cpu usage.  top -b -n1 | grep "Cpu(s)" | awk '{print $2 + $4}'    Output:  14.5   Here I am getting problem is that the output depends on top command thus it doesn't change instantly as top command. So I am not getting correct cpu instantly. It gives same output and not changing.  I want to get real-time cpu usage in output. Please help me to improve my command.
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let me just preface this by saying I am new to Blender and have a very minimal knowledge pf it as of now.  The problem happened as I was following along with a tutorial and while doing a cloth simulation, I was getting about 0.4 fps (this was my first time running an animation), I checked blender's usage of system resources via task manager and everything was under utilised, with blender using memory 6-7%, cpu 8-12%, gpu 2-4% and no other major applications running. I have looked for ways to make it use more of these resources but couldn't find any that made much difference, I did in the end get it to 2 fps but that was due to a post that said scaling small objects up makes blender process the simulation better. I am hoping someone here can tell me how to optimize blender to better use these resources. I am running the animation in viewport and solid shading, this isn't with regards to rendering speeds although even then the system resources remain under-utilised.  My specs:  Dell XPS 15 9560 | Windows 10 v. 1909 64-bit  GPU - Nvidia GeForce GTX 1050  CPU - Intel Core I&amp;-7700HQ @ 2.80Ghz (8-core)  RAM - 32 GB  Please let me know if the information is incomplete.
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Under Process Explorer, I noticed that System -- and occasionally Interrupts -- are taking between 5% and 20% CPU constantly, for hours on end. This is resulting in weird video playback problems. (Audio files have 'gaps' and YouTube videos have pauses in them.)  This problem has been happening for a while. Sometimes, a restart fixes it, IIRC. I also recently upgraded to a 1920x1080 monitor... But this shouldn't have any affect on audio. I also just disabled ReadyBoost (which I also got recently).  I killed PeerBlock and uTorrent, and this still continues to happen; previously, killing them was enough to get my CPU back down to ~0%.  My CPU temperature is ~55 C and my HDD is at &lt;40 C.      So it is uTorrent's fault (or PeerBlock or Comodo).
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I'm getting the following output from top:  Cpu(s): 43.8%us, 32.5%sy,  4.8%ni,  2.0%id, 15.6%wa,  0.2%hi,  1.2%si,  0.0%st Mem:  16331504k total, 15759412k used,   572092k free,  4575980k buffers Swap:  4194296k total,   260644k used,  3933652k free,  1588044k cached   the output from iostat -xk 6 shows the following:  Device: rrqm/s   wrqm/s     r/s     w/s    rkB/s    wkB/s avgrq-sz avgqu-sz   await  svctm  %util sda       0.00   360.20   86.20  153.40  1133.60  2054.40    26.61     1.51    6.27   0.77  18.38 sdb       0.00     0.00    0.00    0.00     0.00     0.00     0.00     0.00    0.00   0.00   0.00 sdd      22.60   198.80   17.40   31.60   265.60   921.60    48.46     0.18    3.70   1.67   8.20 sdc      16.80   218.20   22.20   23.40   261.60   966.40    53.86     0.21    4.56   1.49   6.78   Based on the above it looks like something must be overloaded. But what?   Questions   If its not the harddisk or the CPU then what? It seems as though 15.6% of the CPU's time is spent waiting. What exactly could it be waiting for?
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System Load Indicator displays plots of CPU activity, memory use, hard drive i/o, etc. There's also a "Load" graph, but I don't know what it means. What exactly is this "Load"?
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lead me to be quite shocked with my current system. The CPU in my workstation is an i7 with hyperthreading enabled, and cat /proc/cpuinfo produces 4 'cpu's.  That all given, my PC can generate over a 16 in all the load average slots from 1 minute to 15 minutes while compiling packages for Gentoo, but still be working perfectly for all other tasks as well. I've even seen it as high as 24, though it was starting to slow down at that point. How does this work, if 1.0 is supposed to represent one core at full utilisation?
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Basically, I want to track which processes are running and their cpu % throughout the day to pinpoint random freezing and slowness. I would like to go in to a text file and see a log of the previous days processes, or something to that effect.
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I'm attempting to limit a process to a given number of CPU cores. According to the taskset man page and , the following should work:  [fedora@dfarrell-opendaylight-cbench-devel ~]$ taskset -pc 0 &lt;PID&gt; pid 24395's current affinity list: 0-3 pid 24395's new affinity list: 0   To put it simply - this doesn't work. Putting the process under load and watching top, it sits around 350% CPU usage (same as without taskset). It should max out at 100%.  I can properly set affinity via taskset -c 0 &lt;cmd to start process&gt; at process spawn time. Using cpulimit -p &lt;PID&gt; -l 99 also . In both cases, putting the process under the same load results in it maxing out at 100% CPU usage.  What's going wrong here?
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I have a machine with Intel(R) Xeon(R) CPU E5520 visible as 16 logical cores (8 with HT). If I run something to eat CPU time (single threaded) top correctly reports 100% CPU usage for the process but only around 3-4% total usage.   Cpu(s):  3.6%us,  0.0%sy,  0.0%ni, 96.4%id,  0.0%wa,  0.0%hi,  0.0%si,  0.1%st    PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND  1567 www       20   0 65632   84    4 R  100  0.0   0:05.96 burnMMX   Surely the reported usage should be ~6.25% (1 of 16 cores).   Is it incorrect because it's a virtual machine?  How could I calculate a correct value?
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I've been running Ubuntu 17.10 for a good while. Starting yesterday (April 9) the process gnome-software started using large amounts of memory. I don't know if it is related to the update that I took that day.  gnome-software grows to use up to 7G of memory (my system has 8G of RAM.)  This expands into eating up swap and root. My root usually runs at 51% of its total disk space and it went up to 96%. System ground to a halt. Had to power off. Only after some automatic disk cleaning (?) did root return to 51% usage on its own.  This happened twice yesterday and it is starting again today.  After running only 1 hour gnome-software is now using (according to system monitor) virtual mem=5.4G, Resident me=4.7G, memory=4.7G    More info:    This is continuing to happen.  The root disk space is being used in at least the file /var/log/syslog.  Over the last few hours it has grown to 4.9G in size.  I have to manually kill the gnome-software process and delete the log file to keep the computer functional.  When gnome-software starts using memory, the CPU jumps up and down  from 100% to 0%.  This can be seen in the system monitor program in the resources tab. I verified this by stopping the gnome-software process and CPU usage goes to almost nothing.  Telling the process to continue show CPU usage jumping all over again.  This CPU usage doesn't show up in "% CPU" on the process page.  Probably due to the refresh interval?    Even more info:    This is the error that repeats over and over in /var/log/syslog when this is happening. syslog was 1.7G when I caught it this time.  Apr 10 20:27:31 rwkeating-XPS-8300 gnome-software[2485]: g_byte_array_remove_range: assertion 'index_ + length &lt;= array-&gt;len' failed Apr 10 20:27:31 rwkeating-XPS-8300 gnome-software[2485]: Ignoring unexpected response   I verified this by pausing the gnome-software process while doing a tail on syslog and then un-pausing the gnome-software process only to see the error flooding the log.  So it is caught in this loop.  Don't know what it means ... yet.
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I often do 3D rendering in the background which consumes 100% of the CPU (I lower the priority of the process so that it does not hinder any tasks I am working on).  My concern/question is whether it is okay to run a computer/laptop with a 100% CPU load constantly.  Could this reduce the lifespan of the system?
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Why are the accountsd and securityd processes using so much CPU on OS X 10.10.3? I am on a Early 2011 Macbook Pro.  What are these processes for? Is it safe to kill them? The machine has only been up 4 hours so has been rebooted recently.
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Suppose we have one CPU with 2 cores. I seek dynamic scheduling information such as Processes, IO time, IDLE Time, System Time as allocated time specific cores as opposed to aggregated or averaged to a multi core CPU.   Below I have prepared a command but it is giving above information on CPU level and not on core level.  sh-3.2# top -l 15 | grep -i "Processes" | tail -2  Processes: 387 total, 2 running, 385 sleeping, 1677 threads  Processes: 386 total, 2 running, 384 sleeping, 1672 threads
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Typically, my kernel_task process uses 1-4% CPU and 100-700MB of memory. However, sometimes when I have the power adapter plugged in, the CPU usage jumps to around 500% (8 cores) and stays there until I unplug the power adapter. I can plug it back in and everything is fine for a few seconds or a few days, then it eventually happens again. How can I stop this from happening?