CPU load increases at times

We are running Weblogic 6.0 with SP2 on Win/NT Server. The Server has 2 CPU with 2 GB RAM.
But at times thru perfmon we see the Both the CPU load increased to 100% and the users
freeze.
Any Suggestion, Pl let us know.
Thanks in advance.
Anup

You can kill -3 even if nohup'd as long as stderr is redirected to a file
that you can tail (for example).
Peace,
Cameron Purdy
Tangosol, Inc.
Clustering Weblogic? You're either using Coherence, or you should be!
Download a Tangosol Coherence eval today at http://www.tangosol.com/
"Toad" <[email protected]> wrote in message
news:3c6f33ec$[email protected]..
Send the java process a SIGQUIT to get a thread dump. This implies thatyou
not be running with nohup: run as foreground process without the -hotspot
compiler option.
Example: kill -3 pid
(pid is the id of the java process you are signalling)
"levi" <[email protected]> wrote in message
news:[email protected]..
How to do a thread dump on Solaris?
Thanks,
Levi
"Cameron Purdy" <[email protected]> > Get a thread dump. Use
Ctrl-Break
in
the DOS box running Weblogic.
Peace,
Cameron Purdy
Tangosol, Inc.
Clustering Weblogic? You're either using Coherence, or you should be!
Download a Tangosol Coherence eval today at http://www.tangosol.com/
"Anup" <[email protected]> wrote in message
news:[email protected]..
We are running Weblogic 6.0 with SP2 on Win/NT Server. The Server
has
2
CPU with 2 GB RAM.
But at times thru perfmon we see the Both the CPU load increased to
100%
and the users
freeze.
Any Suggestion, Pl let us know.
Thanks in advance.
Anup

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Firefox consumes a lot of CPU resources after some time

Hi,
I've upgraded from Firefox 3.5.16 to Firefox 5.0 on Linux i386 with 512 MB RAM. Everything is working fine until after "some time" (don't know the exact time period) the CPU load increases to 100%, my average system load explodes and the system is swapping memory wildly. This suddenly happens, even if Firefox is in the background while I'm working on different things. So it does not belong to any memory-hungry stuff like Flash pages or JavaScript sites.
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High CPU load on SUP720-3BXL / C6k

Hi,
I know it has been discussed many times before, but may I get some new inspiration to solve some problems here.
We've some c6509 with SUP720-3BXL. One of routers has a WS-X6704-10G module with DFC. This is the only card installed besides the SUP720. We're run into some heavy CPU problems regarding the RP:
c6k-05#sh proc cpu sorted
CPU utilization for five seconds: 71%/12%; one minute: 77%; five minutes: 78%
PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process
252 70001864 72821359 961 37.88% 34.97% 33.83% 0 Earl NDE Task
12 13535512 7478495 1809 9.67% 7.18% 5.88% 0 ARP Input
354 13418508 655279 20477 7.27% 6.52% 6.47% 0 CEF: IPv4 proces
275 5628156 14433722 389 2.79% 2.47% 2.46% 0 ADJ resolve proc
273 5720936 8782567 651 0.31% 0.56% 2.06% 0 IP Input
SP looks like normal:
c6k-05#remote command switch sh proc cpu sorted
CPU utilization for five seconds: 24%/0%; one minute: 24%; five minutes: 25%
PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process
316 5711876 422724 13512 6.55% 3.36% 3.18% 0 Hardware API bac
109 10629720 20123627 528 6.31% 6.87% 6.98% 0 slcp process
3 10847468 988165 10977 5.27% 6.11% 6.13% 0 CEF: IPv4 proces
253 3055016 108213 28231 1.67% 1.70% 1.70% 0 Vlan Statistics
c6k-05.nc#sh proc cpu history
7777666668888888888999998888877777777766666777777777777777
6666888880000044444222220000000000333399999555557777755555
100
90 *****
80 **** ******************** ***************
70 **********************************************************
60 **********************************************************
50 **********************************************************
40 **********************************************************
30 **********************************************************
20 **********************************************************
10 **********************************************************
0....5....1....1....2....2....3....3....4....4....5....5....
0 5 0 5 0 5 0 5 0 5
CPU% per second (last 60 seconds)
9999988999999999888989899999999889999999999999999999999999
1522389859375081979774546389531690556610500213560563134442
100 * *** ** * * * *#* **** * ** **
90 **************************##******************************
80 #############*#########*##################################
70 ##########################################################
60 ##########################################################
50 ##########################################################
40 ##########################################################
30 ##########################################################
20 ##########################################################
10 ##########################################################
0....5....1....1....2....2....3....3....4....4....5....5....
0 5 0 5 0 5 0 5 0 5
CPU% per minute (last 60 minutes)
* = maximum CPU% # = average CPU%
9999999999999999999999999999999999999999999999999
9999999999999999999999999999998999999999999999999
100 *************************************************
90 *****##******************************************
80 #################################################
70 #################################################
60 #################################################
50 #################################################
40 #################################################
30 #################################################
20 #################################################
10 #################################################
0....5....1....1....2....2....3....3....4....4....5....5....6....6....7.
0 5 0 5 0 5 0 5 0 5 0 5 0
CPU% per hour (last 72 hours)
* = maximum CPU% # = average CPU%
Our Netflow statistics will consume many of the CPU time, this is clear.
ip flow-cache timeout inactive 10
ip flow-cache timeout active 1
mls aging fast time 14
mls aging long 64
mls aging normal 45
mls netflow interface
mls netflow usage notify 90 21600
mls flow ip interface-full
mls flow ipv6 interface-full
mls nde sender version 5
Anything else to search for? This box has a lot of L3 VLANs and many many /24 subnets as secondary addresses inside the SVIs. QoS and COOP is enabled and heavily used. The box receive one full-table (~508k), one partial table (~130k) and two iBGP feeds with ~1k prefixes.
c6k-05#sh int te1/1 | i 5 minute
5 minute input rate 917021000 bits/sec, 576857 packets/sec
5 minute output rate 1021949000 bits/sec, 376221 packets/sec
c6k-05.nc#sh int te1/3 | i 5 minute
5 minute input rate 1266207000 bits/sec, 450679 packets/sec
5 minute output rate 2140145000 bits/sec, 1342052 packets/sec
c6k-05#sh ver | i IOS
Cisco IOS Software, s72033_rp Software (s72033_rp-ADVENTERPRISEK9_WAN-M), Version 12.2(33)SXI14, RELEASE SOFTWARE (fc2)
Don't know if this is CPU related: (messages appears every 2-3 min. in the log)
Nov 25 15:51:45.558 CET: %SYS-3-CPUHOG: Task is running for (204)msecs, more than (200)msecs (14/7),process = BGP Scheduler.
-Traceback= 4035A898 4036D818 4036D9AC 4166696C 4036F228 4036F310 4166BB70 4166BB5C
Any suggestions? Thanks in advance.
Thomas

Hi Rajeev,
we have temporary disabled Netflow after we ran into a flapping BGP session problem one hour ago. Router killed BGP related processes due to no free CPU time.
After disabling Netflow, the load of the RP has been decreased dramaticly from <80% to ~30%. But we can't disable Netflow at all because we need the flows to get information for our DDoS protection.
We have now increased CPU ressources for processes:
(no scheduler max-task-time)
scheduler allocate 10000 4000
CPU load is (very) high again:
c6k-05.nc#sh proc cpu sorted
CPU utilization for five seconds: 90%/21%; one minute: 85%; five minutes: 86%
PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process
252 107378140 111133354 966 23.43% 25.49% 23.13% 0 Earl NDE Task
563 7056500 8738616 807 17.75% 2.72% 2.12% 0 SNMP ENGINE
354 21164144 876799 24138 5.75% 6.37% 6.35% 0 CEF: IPv4 proces
12 22983692 11691250 1965 5.43% 6.08% 5.60% 0 ARP Input
273 10269700 12841900 799 4.95% 9.15% 11.49% 0 IP Input
329 889568 11066 80387 3.35% 0.41% 0.27% 0 IP Background
275 8864220 22191938 399 2.63% 2.48% 2.50% 0 ADJ resolve proc
342 3048616 225163 13539 1.51% 0.73% 0.72% 0 IPC LC Message H
514 3188912 929923 3429 1.27% 0.84% 0.89% 0 BGP Router
52 319360 7229 44177 1.19% 0.14% 0.07% 0 Per-minute Jobs
561 634184 4164207 152 0.63% 0.18% 0.16% 0 IP SNMP
All is unsatisfactory :-(
Kind regards,
Thomas

CPU load unbalanced and too low in multi-processor computers

I have a rather large test system 5-6000 VIs and we have noted some peculiar behaviour.
On a single processor system the application can take up to 100% of the available resources.
On a two processor system the application can take up to 50% of the available resources.
On a four processor system the application can take up to 25% of the available resources.
On an eight processor system the application can take up to 12-13% of the available resources.
I think you guys can get the gist of what I stated above (I didn't get pictures for 1 and 2 CPUs but I have observed the behaviour, personally)
We haven't done any specific multithreading code (we do lauch many parrallel processing loops dynamically = should be a good thing)
Why is the application behaving this way? Does anyone have a similar problem? Any tips?
Thanks for any help you can offer.
//David

You really don't provide enough information.
Is there really always something to do to keep a core busy at all times? Unless there is serious computations involved for solving a math problem, a typical VI should not be using a lot of CPU. (For example if it needs a full core today, it would not have been possible to even run the test a couple of years ago. That would be hard to believe). Don't overestimate how much a modern computer can do using only 5% of the CPU at any given time. I still run an acquisition system on a 120MHz Pentium 1 and LabVIEW 4. There are no performance problems even though the hardware is orders of magnitude slower than even a modern Atom processor on a netbook.
How many things can really occur at the same time? If you make your code overly sequential by lining everything up along error wires or by overuse of sequence structures, the code cannot be efficiently parallelized, no matter how hard the compiler tries.
How many of the 6000 VIs are called concurrently? How many require full CPU? If this is a test system, I assume that there is interaction with a device under test? Are the tests sequential or parallel? How many devices are tested at the same time? How much is post-processing compared to waiting for results? Are the tests really CPU limited??? Really???
Have you done any profiling? Did you identify the part that is most demanding? Could it be that a single greedy loop is consuming most of the CPU doing nothing?
Except for lengthy simulations or complex data processing, a typical application should never be CPU limited. The timings should be fully software controlled such that the code runs the same, independent of the power of the computer.
All that said, LabVIEW can easily keep all CPU cores busy if really needed and if programmed correctly and with parallel processing in mind. I have a complicated lengthy fitting code where I was able to keep 64 cores at near 100% (4 AMD 6274 CPUs with 16 cores each). As a more typical example, and compared to sequential execution, the parallelized code is 4.5x faster on a quad core I7 (if I disable hyperthreading in the bios, I get a 3.8x speed increase), so not only can it keep all four cores at 100%, it can even get a measurable boost from hyperthreading. On a six core I7, I get a 6.9x speedup, also keeping all cores busy.
I am not going to look at a project with 6000 VIs, but please show us some profiling data. Find the VI that carries most of the load and attach it if you want.
LabVIEW Champion . Do more with less code and in less time .

CPU Load 98% after changed MTU size

Hi,
I am having problem here. Previously, when the MTU was 1508...The cpu load was <5%. When changed to 1512, the load was increasing 70%. Recently, changed to 1522, the load is >95%. Not sure what's going with the configuration. But I can a lot ques dropping. Should I put on the port-channel 1? For more details configuration, please refer to attached file
hold-queue 1024 in
hold-queue 1024 out
# show proce cpu
CPU utilization for five seconds: 96%/38%; one minute: 96%; five minutes: 96%
PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process
# show proce cpu | include Tag
165 150300 11396947 13 0.07% 0.01% 0.00% 0 Tag Control
193 2608887200 237733062 10974 52.23% 52.71% 52.44% 0 Tag Input
304 4692 36566 128 0.00% 0.00% 0.00% 0 Tagcon Addr
Any idea guys. Thanks lot

I had this same exact problem on the cat 6500 running SXF10. Where I enabled MPLS and it caused CPU to spike. So to check what is getting forwarded to the MSFC perform the following to see a packet capture of what is hitting the CPU. So you need to run a SNIFFER capture.
Note this is only for the 6500 platform... once you check what's hitting the CPU (eg: fragmentation, icmp type 3 code 4's, etc al)...
Here are the instructions to setup inband span (which monitors traffic sent
to the MSFC):
Router#monitor session 1 source interface fa 3/3 !--- Use any interface that
is administratively shut down.
Router#monitor session 1 destination interface fa 3/2 !-- connected to sniffer port
Now, go to the SP console. Here is an example:
Router#remote login switch
Router-sp#test monitor add 1 rp-inband rx <--- check the syntax as it varies
from one IOS to the next so use ?
Verify monitor session:
Router-sp#test monitor show session 1
Ingress Source Ports: 3/3 15/1
Egress Source Ports: 3/3
Ingress Source Vlans:
Egress Source Vlans:
Filter Vlans:
Destination Ports: 3/2
Go back to the RP and verify the monitor session as well:
Router#show monitor
Session 1
Type : Local Session
Source Ports :
Both : Fa3/3
Destination Ports : Fa3/2
SP console:
Router-sp#test monitor session 1 show
Ingress Source Ports: 3/3 15/1
Egress Source Ports: 3/3
Ingress Source Vlans:
Egress Source Vlans:
Filter Vlans:
Destination Ports: 3/2
To remove the inband span from sp do test monitor session 1 del and from the rp do no mon sess all
===============================
So my exact issue was two parts, CPU spike up 99% when WCCP was enabled with MPLS tag switching at the same time. Rebooting didnt help... I ended up changing from SXF10 to SXF14 IOS just in case but I still had high CPU after upgrade. But the major difference was when I removed the ACL tied to WCCP and removing the ACL completely and re-pasting into the configs for WAAS and then reapplying. But in my sniffer capture I did notice a lot of ip fragmentation hitting the MSFC processor. Now my MTU is 1522 and works fine.

Fan RPM (rounds per minute) based on CPU load

I did some small testings regarding when the fan's are starting. I'm experiencing the following:
When running 3 times: yes > /dev/null the fans start to spin up after 1 minute full CPU load. They keep running till i kill those 3 processes. After 10 minutes full load the notebook is getting less hot because the fans are running at a good speed.
What they should do is write a component in osx that will measure the temperature and based on that information let the fans run...
With the current system the load is increasing all the time because you use it.. if the fans would start when its getting hotter the increasing temperature would stop and the case temp would be stable.
Therefor i dont think bringing in your laptop will help. I think they should be able to fix the problem thru software. Just like the whine issue... just the wrong amount of voltage are send thru the cpu.
The problem is... apple doesnt confirm this.. i hope OSX 1.4.7 will have such a tooling within it.
What do you think?

My completely unscientific experiences with my own MBP seems to support this, and I do believe that it begun happening after the last SMC update. I also believe that heat does in fact have an effect on the fans, but it is additive and that is why you mostly experience the fan activity generated by the CPU load.
I can hear my fans quite clearly on low RPM because of a strange, plastic whirring sound (oddly enough, they become more quiet on higher RPMs).

J2EE Processes using 25% CPU load without load

Hi
We are running a Portal cluster with 2 cluster application nodes with each 2 J2EE server processes and a dispatcher.
We experiences that after some time the J2EE server processes can start using typical 25% CPU without any load on the portal - after some time the load typically increase to approx. 50% CPU (still without user load) and the only "solution" is to restart the processes.
Anyone you have experienced a similar behaviour?
BR
Tom

Are you doing load balancing too somewhere?
I though I read somewhere about some replication between nodes that goes on. If they transfer their information and drop it, that is fine. But they don't. On the next round they exchange the new info and info from the last time. It just grows. Look at you DB server, check to see if one of the DB's grows with the CPU load.
The other thing is logging. I am a log freak myself but, sometimes I get into trouble by logging too much. Next time your CPU loads check *.log and temp logs, see if there are any over 10 gig.
Not that I never had one,
no,
never.

SharePoint 2013 - First load takes long time

I could be barking up the wrong tree here, but Ive had a continuous problem loading sites for the first time in SharePoint 2013. I've tried multiple warm up scripts, cleared out the cache, increased resources.
Specs
SharePoint 2013 Server
OS: Windows Server 2013
RAM: 16GB
CPU: 2x 4cores
SQL Server 2012
OS: Windows Server 2013
RAM: 8GB
CPU: 1x 4cores
This server is still in development, so there isn't a lot of traffic going to it. I opened the Developer Dashboard to try and pinpoint where the latency was coming from. One process or scope by far takes the longest.
SPClaimsCounterScope
Start Time(ms)489
Duration(ms)6488
CPU(ms) 6343
Next would be SPSqlClient which only takes about 1sec. After the WebApplication loads the first time, the performance is fine. It's just that first time after a reboot, reset, or first thing in the morning.

Hi
There is a 'known issue' with SharePoint's initial load. SharePoint runs on the .Net framework on IIS, which goes to sleep by itself, or in your case an IISRESET restarts all the services.
Though the IIS services are running, nothing is going on until that first request is made to the website. At that moment, the .Net Framework has to compile all of the DLLs that comprises SharePoint and its features. So the initial load will take a long time,
and the more features you're using (User Profile, Metadata, etc), the longer it'll take.
Also following are some of the links which can be helpful
http://blog.blksthl.com/2013/05/15/sharepoint-2013-page-loads-takes-a-very-long-time/
http://social.technet.microsoft.com/wiki/contents/articles/14287.sharepoint-2013-how-to-improve-speed-on-first-page-load.aspx
Please mark the Answer and Vote me if
you think that it will help you to resolved your issue

VI causes high CPU load after several days of running

Hello,
I have a strange problem. I have craeted a test bench control VI and it runs on five PCs, controling five test benches. All PCs have almost the same hardware, same motherboard, same CPU, etc.
Normaly the CPU load is around 50% when I run the VI, but at one PC the CPU load climbs up to 85% after several days (maybe one week) of continuous running and the PC is almost tied up - the VI execution becomes very slow (10 times slower) and the mouse only moves very slowly.
First I thought that the PC has a problem but the problem dissapears as soon as I stop and restart the VI!
I don't even have to terminate LabVIEW - only my VI and then everything is okay again.
The problem does not seem to occur at the other four PCs, but I can not tell for sure.
The task manager says only LabVIEW causes the CPU load - swap file utilisation is little.
Is there a way to analyze what causes the high CPU load?
I Use LabVIEW 7.1 professional
Operating System: Win XP (SP 2 or 3 I don't remember)
P.S. I have no loops without wait-functions.
Greetings Johannes
Using LabVIEW 7.1 and 2009 recently
Solved!
Go to Solution.

Do all PCs have the same amount of RAM?
What is the memory use over time as seen by the windows taks manager. Does it increase gradually?
An increase in resource usage if often cause by sloppy programming.
Do you grow arrays forever or constantly resize arrays in memory? (built array, insert into array, delete from array)
Do you often create new references and never close them?
What does the program actually do? In my opinion, a constant 50% CPU load seems too high for my taste. It means it would not even be able to keep up on slightly older hardware.
LabVIEW Champion . Do more with less code and in less time .

CPU load higher after applying in 147440 kernel on Oracle database servers

Hi all,
Just wanted to know if anyone else is seeing an Increased CPU load with higher peaks and for longer periods of time, especially on single thread processes on oracle database servers. Our Oracle Database versions vary from Oracle 10 to Oracle 11.1.0.7 11.2.0.2 10.2.0.4. The Hardware includes Sunfire V245's, V440 and T5240. We saw a slight performance hit when going to 147440-02 at the first of Oct, but no big deal. Then we applied 147440-04 in the first part of Nov. And of course we got CPU panics and Zfs file system stopped mounting basically a complete disaster. Oracle provided and IDR for the CPU panic and then later release 147440-06. Which resolved the CPU panics and zfs file system mounts. But now our load average on is 1 to 3 points higher during load, grid control is constantly complaining of 100% utilization. I have had a call open since the first of November with oracle/sun support and have provided guds performance stats on before and after Kernel change. They are still saying that its not an issue. It is so bad we had to roll back to a July kernel on one of the servers.

Just to let you all know what we have found. After 2 1/2 months of working with Oracle Kernel team, they have identified the Oracle Enterprise Manager (emagent) (Grid control Agent) was using nearly 60000 threads under the 147440 Kernel and only 1500 threads under an older kernel.
I googled the solution for the emagent, but I continue to press Oracle Kernel Engineers to work with their software division, to identify other products that might cause similar problems.
http://oracle-dba-quickanswers.blogspot.com/2011/10/emagent-consuming-very-high-cpu.html

100% CPU Load

Hi,
I've been running the trial of Lightroom on Win XP, Athlon XP 3.2Ghz w/1Gb RAM + 2 hard drives. 1 SATA drive (all my images) and a 10Gb IDE disk for the database.
I've read some of the FAQs and switched off every process that I don't need (AVG, iPod service etc). However, I've found that lightroom completely takes out my PC quite regularly (BSOD) and when it doesn't do that, it either crashes itself or sits there, doing absolutely nothing but taking 100% CPU load. It seems to be doing something in substrate.dll but I've googled and not found much information on it.
anybody have a similar experience? any ideas? From the odd bit of time I've had with the tool, I think it will be great, if only it didn't fall over at every opportunity.
cheers,
Matt

I have upgraded to Lightroom 1.1 and am having severe problems. I am running Windows XP SP2. When I try to access a photo in Library or Develop, it hangs for minutes "loading." Windows Task Manager indicates 100% CPU issues whenever I try to do anything. I see by this thread that I should increase the swap file (which for Adobe Photoshop CS3 is located on another disk on my laptop as hdd space is limited on my primary hard drive). I cannot find this setting for Lightroom. Also, should I try to delete all photos in the Catalog and reinstall all of them to improve performance? I am quite desperate. I did not have these problems w/ Lightroom 1.1, even with limited hdd space. Please advise. Thanks, Ina <[email protected]> wrote in message news:[email protected].. > Hi Matt -- > > One thing that might be revealing would be to run FileMon (get it from > sysinternals.com) as that may provide further clues to what LR is doing > with its time. Filtering the traffic by lightroom.exe and let me know what > activity you can see there. > > One question: do you have files offline (on external disks that aren't > plugged in, for example) and have automatically write XMP enabled (in > catalog settings, which can be reached via the preferences dialog or in > the file menu). > > Dan Tull > Lightroom QE, Adobe Systems

MBP 5,3 75°C hot at 0% CPU load after SSD install

Hello, i decided to post my problem here because i have not found any help on other forums.
Two weeks ago i installed a Samsung 830 SSD with 256 GB using the Optibay SSD Kit from Hardwrk (http://hardwrk.com/en/ssd-hdd-adapter-kit-for-macbook-pro.html). The SSD sits where the HDD was beforce and the old 500 GB HDD sits in the Adapter from the Kit where the optical drive was.
After installing the hardware, everything worked fine; i (partially) cloned the HDD to the SSD and booted from it. Only the biggest User folders are left on the HDD. A couple of days later i noticed that the CPU temperature was between 75°C and 80°C in idle, with no processes causing CPU load. The fans are working and spinning with about 3000 rpm. I increased the fan speed to maximum with iStat Menus and the temperature lowered to about 58°C which was normal before installing the SSD. After about 10 minutes of maximum fan speed i set the fans back to normal and the temperature increased to 78°C again.
I tried a safe boot and there are no such problems, the CPU temperature is at 58°C in idle. So i booted in normal mode again and the temperature stayed at 58°C in idle. I shut down the MacBook and turned it on again in normal mode. The temperature increased to 80°C and stayed. I don't understand that behaviour.
The HDD is far away from the CPU so it doesn't affect heating, the SSD is more cold than hot. I don't know where this problem comes from. Has anybody noticed a similar behaviour after installing a SSD? If you need additional information i will provide these.

Hello and thank you for participating in this discussion,
as i am the starter of this thread, i want to tell you the story how i fixed this problem.
as you know the MacBook from Mid 2009 has TWO internal SATA ports, one for the optical drive and the other for storage devices such as HDD and SSD. Prior posting my problem here, i used this two ports as follows:
SATA connector 1 (where by default the optical drive is attached to):
here i placed the adapter cage from hardwrk (Link) and IN there i placed the old HDD, which was attached to SATA 2 before setting the MacBook up for SSD
SATA connector 2 (where by default the HDD is attached to; below the optical drive):
here i placed the new SSD
With this setup i did experience the problems with higher working temperature of the MacBook. After testing on software level, turning TRIM on or off had no effect to the high temperature, i decided to open up the MacBook another time. i checked all the wires and connectors, everything okay. Back turned on, same problem.
Then i decided to switch the devices. Means, SSD in adapter cage, HDD on the old place. Voila! Temperature problems are gone. Maybe you try this.
Hope it helps. Let me know!

90% cpu load on ubuntu 8.04

Hello all,
I made a visualization for sorting algorithms. (The code is to long to post it here)
I developed the app under this system:
Windows Vista Home x64
Dualcore ~2.6GHz
Java Version: 1.6.0 Update 7 32bit
and i have a cpu load of ~10% when i run the app.
I asked my friend to test the app under his OS:
Ubuntu 8.04
Dualcore ~2.2Ghz
Java Version: 1.6.0 Update 7 32bit
and he got a cpu load of over 90%!
We both had no running tasks in background. It was only the java app.
Are there any known issues about this problem or could could it be a coding problem?
Btw the programm uses round about 8 Threads.
TIA

mod235711 wrote:
I'm sry.
Ok i try to specify a little bit more.
e.g.: I have this code snippet to check whenever the algorithm has finished.
while (!algorithm.isIdle())
                              try
                                   sleep(1);
                              catch (InterruptedException e)
                                   clockRefresh.interrupt();
                                   setIdle();
                         }Without the sleep I have a cpu load of 50% (of course, because it is an endless loop until the algorithm has finished).
But with the sleep time it's just 1 or 2%.
I want to know if there is a known issue in the JVM that causes threads on some systems to use to much cpu load.
Or could it be a coding problem?
What do you think about the sleep time in this loop?
Or could the high cpu load be caused by bad coding?After reading this post I could not read further. There is the problem. You're doing a sleep(1) .....
Even in C that will most likely kill any cpu. Try to use joins: elegant and faster ;)

How do you spread CPU load over more cores?

Hi
I recently bought a macbook pro quadcore i7 because my 2007 macbook couldn't cope with the demands of Logic when using it rewired with Ableton Live, and had lots of CPU overload messages.
I am really disappointed that having spent so much money to overcome this problem, it has only slightly improved the amount of overload messages. I read the article below about how to spread CPU power over the cores, now I have 8. I still can't figure out though how to control which channels are using which core and spreading the CPU load to cores 5-8 which don't seem to be being used. Any ideas?
Can I rewire from ableton to different cores?
In my project, the 2nd core keeps overloading whilst the others are down. Is it to do with aux channels, master channels, buses etc?
Or should I upload my memory to 8GB RAM?
Thanks
Steve
Here's the article:
About core activity
Logic breaks tasks down into threads that can be assigned to a single core for execution. It's not possible to split a single thread across multiple cores, although a single core may run multiple threads at the same time. This is one reason that you may sometimes see uneven load distributions across the available cores on your computer. If one thread is very processor-intensive, the core running that thread may show much more activity than the cores running less demanding tasks. This is the main reason that you may get "Core Audio Overload" warning messages even though some of the cores on your system may not show significant activity.
To monitor Logic as it uses the cores on your system, double-click the CPU meter in the Transport area.
A window displays a meter for each core.
The same concept applies to channel strips as well. Each channel strip—and all plug-ins it contains—is processed by one core. If you are using many processor-intensive plug-ins on a single channel strip, the core running it may show heavier activity. This is especially true if you are working at high sample rates (88.2 kHz or higher).
Redistributing core loads
If you find that a single core has much higher activity, use these strategies to redistribute the load.
In the example below, there is a single Software Instrument channel strip with plug-ins routed directly to Output 1-2. The channel strip for Output 1-2 has a large number of plug-ins.
In this example there is activity on two cores: the left core is handling the Software Instrument while the next core processes the Output 1-2 channel strip. You can use routing capabilities in Logic to distribute the load to more cores without changing the sound, as in the next image.
The resulting signal chain is Inst 1 > Aux 1 > Aux 2 > Out 1-2, as shown in this table:
Channel strip
Input
Output
Inst 1
Bus 1
Aux 1
Bus 1
Bus 2
Aux 2
Bus 2
Out 1-2
Also, the first four plug-ins have moved from Output 1-2 to Aux 1 and the remaining four plug-ins to Aux 2.
After adjusting the volumes to the respective channel strips appropriately, the result sounds identical, but now the load is distributed among four cores instead of two. You can use this concept to redistribute plug-ins from Audio channel strips, Software Instruments, Auxes, and Outputs (as in this example).
In the image above, there is still a very heavy load on a single core, even though it's using the routing described above. Notice the Inst 1 channel strip is selected. When a Software Instrument track is selected in the Arrange window, Logic enters "Live Input Mode". In this mode, Logic turns on every plug-in in the channel strip's signal path so the channel strip can be played live from a MIDI controller. All of this must be handled by a single thread and therefore just one core. It's a good idea to keep a track that uses an Audio channel strip selected in the Arrange window, unless you're actively playing or recording to a Software Instrument.

OS X Snow Leopard introduced Grand Central, where the OS will distribute the load better to more cores, however it takes time for software to adapt to these changes and make a rewrite of the codebase and test it out, Apple's included.

Kernel_task running above 500% CPU load on my Macbook Pro running OSX 10.9.4

I recently upgrade my Macbook Pro to OSX 9.0.4 and the system is running sluggishly slow, Activity Monitor showing kernel_task always running above 500% CPU load, system fan always running loud at startup but laptop is not overheating. Below is the EtreCheck report, hoping if anyone can help me fix this issue, much appreciate it. Btw, I have done the SMC reset, but nothing has helped.
EtreCheck version: 1.9.13 (49)
Report generated 16 August 2014 2:30:27 pm AEST
Hardware Information: ?
MacBook Pro (Retina, Mid 2012) (Verified)
MacBook Pro - model: MacBookPro10,1
1 2.3 GHz Intel Core i7 CPU: 4 cores
8 GB RAM
Video Information: ?
Intel HD Graphics 4000 - VRAM: (null)
Color LCD 2880 x 1800
NVIDIA GeForce GT 650M - VRAM: 1024 MB
System Software: ?
OS X 10.9.4 (13E28) - Uptime: 0 days 0:17:38
Disk Information: ?
APPLE SSD SM256E disk0 : (251 GB)
S.M.A.R.T. Status: Verified
EFI (disk0s1) <not mounted>: 209.7 MB
Macintosh HD (disk0s2) / [Startup]: 250.14 GB (103.87 GB free)
Recovery HD (disk0s3) <not mounted>: 650 MB
USB Information: ?
Apple Inc. FaceTime HD Camera (Built-in)
Apple Inc. BRCM20702 Hub
Apple Inc. Bluetooth USB Host Controller
Apple Inc. Apple Internal Keyboard / Trackpad
Thunderbolt Information: ?
Apple Inc. thunderbolt_bus
Gatekeeper: ?
Mac App Store and identified developers
Kernel Extensions: ?
[not loaded] com.digidesign.fwfamily.driver (8.0.3f1) Support
[loaded] com.digidesign.iokit.DigiDal (8.0.3f1) Support
[not loaded] com.digidesign.mbox2.boot.driver (9.0f4) Support
[not loaded] com.digidesign.mbox2.driver (9.0f4) Support
[not loaded] com.digidesign.usb.elevenrack.driver (1.0.1) Support
[not loaded] com.paceap.kext.pacesupport.leopard (5.8 - SDK 10.4) Support
[not loaded] com.paceap.kext.pacesupport.master (5.8) Support
[not loaded] com.paceap.kext.pacesupport.panther (5.8 - SDK 10.3) Support
[loaded] com.paceap.kext.pacesupport.snowleopard (5.8 - SDK 10.6) Support
[not loaded] com.paceap.kext.pacesupport.tiger (5.8 - SDK 10.4) Support
Startup Items: ?
Digidesign Mbox 2: Path: /Library/StartupItems/Digidesign Mbox 2
DigidesignLoader: Path: /Library/StartupItems/DigidesignLoader
PACESupport: Path: /Library/StartupItems/PACESupport
Problem System Launch Agents: ?
[loaded] com.paragon.NTFS.trial.plist Support
[loaded] com.paragon.NTFS.upd.plist Support
Launch Daemons: ?
[loaded] com.adobe.fpsaud.plist Support
[running] com.cleverfiles.cfbackd.plist Support
[running] com.digidesign.elevenrack.helper.plist Support
[running] com.digidesign.fwfamily.helper.plist Support
[loaded] com.google.keystone.daemon.plist Support
[loaded] com.macpaw.CleanMyMac2.Agent.plist Support
[loaded] com.oracle.java.JavaUpdateHelper.plist Support
[running] com.paceap.eden.licensed.plist Support
[not loaded] com.teamviewer.teamviewer_service.plist Support
[loaded] PACESupport.plist Support
Launch Agents: ?
[loaded] com.google.keystone.agent.plist Support
[not loaded] com.teamviewer.teamviewer.plist Support
[not loaded] com.teamviewer.teamviewer_desktop.plist Support
User Launch Agents: ?
[failed] com.facebook.videochat.[redacted].plist Support
[loaded] com.macpaw.CleanMyMac2Helper.diskSpaceWatcher.plist Support
[loaded] com.macpaw.CleanMyMac2Helper.scheduledScan.plist Support
[loaded] com.macpaw.CleanMyMac2Helper.trashWatcher.plist Support
User Login Items: ?
iTunesHelper
SmartDaemon
BitTorrent
uTorrent
Knock
Autodesk 360
Internet Plug-ins: ?
JavaAppletPlugin: Version: Java 7 Update 55 Check version
FlashPlayer-10.6: Version: 14.0.0.145 - SDK 10.6 Support
Default Browser: Version: 537 - SDK 10.9
Flash Player: Version: 14.0.0.145 - SDK 10.6 Outdated! Update
QuickTime Plugin: Version: 7.7.3
o1dbrowserplugin: Version: 5.4.2.18903 Support
googletalkbrowserplugin: Version: 5.4.2.18903 Support
iPhotoPhotocast: Version: 7.0
Safari Extensions: ?
AllMyTube
Searchme-2
iTube Studio
Audio Plug-ins: ?
BluetoothAudioPlugIn: Version: 1.0 - SDK 10.9
AirPlay: Version: 2.0 - SDK 10.9
AppleAVBAudio: Version: 203.2 - SDK 10.9
iSightAudio: Version: 7.7.3 - SDK 10.9
iTunes Plug-ins: ?
Quartz Composer Visualizer: Version: 1.4 - SDK 10.9
3rd Party Preference Panes: ?
Digidesign Eleven Rack Support
DigidesignMbox2 Support
Digidesign Mbox 2 Pro Support
Flash Player Support
MacFUSE Support
Paragon NTFS for Mac ® OS X Support
Time Machine: ?
Time Machine not configured!
Top Processes by CPU: ?
 4% WindowServer
 4% Google Chrome
 1% cfbackd
 0% AppleSpell
 0% Activity Monitor
Top Processes by Memory: ?
213 MB Finder
156 MB Dock
156 MB com.apple.IconServicesAgent
123 MB WindowServer
115 MB Google Chrome
Virtual Memory Information: ?
4.43 GB Free RAM
2.21 GB Active RAM
414 MB Inactive RAM
971 MB Wired RAM
527 MB Page-ins
0 B Page-outs

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 a low-voltage reading from the battery, 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 battery power, the fault is in the battery or the logic board. If it happens only on AC power, charging is causing the machine to heat up. That may be normal on 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.

CPU load increases at times

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