doveman Posted July 16, 2013 Share Posted July 16, 2013 (edited) I had a conversation with the author of LatencyMon. He first told me"The interrupt-to-latency test is only meaningful without having any other programs running in the background."to which I replied"You say it's only meaningful without having any other programs running but my concern is that if I'm getting high latency spikes when certain activity happens, such as writing to disk, then these spikes are going to cause issues with audio/video when this activity happens whilst using A/V software, gaming, etc."and he replied"The interrupt-to-latency monitor simulates a critical audio process. This is why it is not recommended to be running any other activity on top.That said, if you would like to paste the contents of the report view in a message, we don’t mind to take a look to see if there is anything peculiar in your system."So I sent him three reports, one at idle, one launching Iron and one launching Mediaportaland he replied"Your system appears to be OK. Regarding excessive hard disk usage and spikes under load, I suggest you make sure that your harddisks have enough free space and are not fragmented. You can use the standard Windows defragmentation tool for that. If fragmentation on your system is low and not a problem then I suggest considering if excessive paging might be the problem (take a look at your memory load, kill of processes that consume a lot of memory, etc.)"My HDDs are defragged and have plenty of space, so that's not an issue. I also told him that I see tons of hard pagefaults from svchost.exe when analysing the disk with Windows defrag but no latency spikes and he replied"Whether they are connected depends on the priority of the process that incurs the page fault. Defrag runs at lower or idle priority. In principle, only a real-time priority process/thread can compete and thus influence the interrupt to process latency measurements."Which makes sense, although it doesn't get me any nearer to understanding why I'm getting latency spikes with MediaPortal, where it does matter as that's for playing media and having spikes during that could cause audio/video glitches. I guess I should ask on the MediaPortal forums if anyone knows anything about that. Edited July 16, 2013 by doveman Link to comment Share on other sites More sharing options...
testmail123abc Posted July 20, 2013 Share Posted July 20, 2013 (edited) Hi MagicAndre1981,thanks for your good explanation however i believe the Windows Performance Tools Kit has at least a little changed since you wrote your first post (i was not able to select "Load Symbols" after i had selected an interval). And so i did not really find the summary of all calls page.So i used LatencyMon as you suggested and found that "ACPI.sys" was in fact the cause of the high CPU load. In my case the high CPU load did not always start after booting (only around 50% of the time) sometimes it would only start short after starting any 3D intensive program and then stay until I either restart (50/50 gamble ) or go into energy saving mode and reactivate my notebook. So i first i disabled CPU throttling and uninstalled Asus' "Power4Gear" (which adds additional power saving plans to the windows ones) together with a bunch of other pre-installed software. That unfortunately did not change anything.Of course I proceeded with the second step you in that case always suggested (updating the BIOS) ... AND THAT DID IT !I hope that will help others in the future.And of course ...THANK YOU VERY MUCH MagicAndre1981 for the time and work you invest to help!(I also attached some system information and two LatencyMon screenshots)ASUS K53SVWin 7 64BitIntel Core i5-2410MGeFOrce GT 540M CUDA 2GB8GB RAMone 500GB s-ata HDD Edited July 20, 2013 by testmail123abc Link to comment Share on other sites More sharing options...
MagicAndre1981 Posted July 21, 2013 Author Share Posted July 21, 2013 thanks, I saw this several times for ASUS laptops. Updating the BIOS sometimes fixed it. Link to comment Share on other sites More sharing options...
harekowicz Posted July 28, 2013 Share Posted July 28, 2013 Hi!Could you take a look at my trace?http://www.sendspace.com/file/o29ipzThank you very much!! Link to comment Share on other sites More sharing options...
MagicAndre1981 Posted July 28, 2013 Author Share Posted July 28, 2013 please stop all other DPC checking tools and give me a new file. Link to comment Share on other sites More sharing options...
harekowicz Posted July 31, 2013 Share Posted July 31, 2013 Ok, now it should be ok.http://www.sendspace.pl/file/e949f8a97dfef0f9d3ee760 Link to comment Share on other sites More sharing options...
MagicAndre1981 Posted August 1, 2013 Author Share Posted August 1, 2013 ok, there is a large USB 3.0 driver spike:Total = 2592 for module nusb3xhc.sysElapsed Time, > 131072 usecs AND <= 262144 usecs, 1, or 0.04%Total, 2592your driver version is a bit old:"NUSB3XHC.SYS", "2.1.27.0 (nusb3drv.091311-1603)"Get an updated driver:http://www.station-drivers.com/page/renesas.htm Link to comment Share on other sites More sharing options...
spotak2 Posted October 6, 2013 Share Posted October 6, 2013 Hello there,first I would like to tank you for this topic and for your effor to try to help others.I have asus k53sc, intel i3, 4gb ram, Geforce mx 520. WIn 7 proffesionalI have OS on ssd disc solo and instead of my DvD I have hard disk.I have High CPU usage ( 1 of the 4 threads ) is running on 100% most of the time. It starts after I play for some time a game. (WoT, WoW, LoL, AC, anything ) Sometimes it start after 2 minutes sometimes immediately.I've tried program procexp because it can shut a proces down... it didint work.Then I tried that it might be doing screwes in motherboard.... so I carefully disambled notebook and turned it on without screwes and it didint work either. I have tried to re-aply the cooling past on CPU and clean the notebook. I have tried formating the system I have installed every driver u can think of, BIOS chipset, graphic card, sound card everything. I tried to disalble special soundeffects coz I have found that it helped someone. Didn't work.Then I have found your thread and found out that it is probably causing ACPI.sys . Read whole thread and havent found anything that would help me.Here is my DPC file with the txt exported one.http://uloz.to/xWrFZXYt/dpc-interrupts-4-rarI really appriciate what you are doing here and I am looking forward to your advice.Spotak Link to comment Share on other sites More sharing options...
MagicAndre1981 Posted October 7, 2013 Author Share Posted October 7, 2013 please upload it to a better file hoster (zippysharecom, mediafire.com or use dropbox/skydrive). Link to comment Share on other sites More sharing options...
spotak2 Posted October 7, 2013 Share Posted October 7, 2013 http://www72.zippyshare.com/v/38937511/file.html Link to comment Share on other sites More sharing options...
MagicAndre1981 Posted October 7, 2013 Author Share Posted October 7, 2013 you already use the latest BIOS/UEFI. What is the cpu temperature while you see this? Link to comment Share on other sites More sharing options...
spotak2 Posted October 7, 2013 Share Posted October 7, 2013 you already use the latest BIOS/UEFI. What is the cpu temperature while you see thisyes I am using the newest bios, first core 0 has 62-65 and the second 55-58 celsius Link to comment Share on other sites More sharing options...
MagicAndre1981 Posted October 8, 2013 Author Share Posted October 8, 2013 use Speedfan to increase the speed of the CPU fans to cool down the CPU. Does this improve the situation? Link to comment Share on other sites More sharing options...
spotak2 Posted October 8, 2013 Share Posted October 8, 2013 use Speedfan to increase the speed of the CPU fans to cool down the CPU. Does this improve the situation?I was really trying b ut I can't see my fan in speedfan and really don't know how to add it there... I know I have 1 fan there but could you help me please? Link to comment Share on other sites More sharing options...
MagicAndre1981 Posted October 9, 2013 Author Share Posted October 9, 2013 please try NoteBook FanControl (NBFC):http://www.computerbase.de/forum/showthread.php?t=1070494and look if this works. Link to comment Share on other sites More sharing options...
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