DPC Latency Checker instal the new for mac

#DPC LATENCY CHECKER INSTAL THE NEW FOR MAC HOW TO#
#DPC LATENCY CHECKER INSTAL THE NEW FOR MAC DRIVERS#

#DPC LATENCY CHECKER INSTAL THE NEW FOR MAC DRIVERS#

If you see UNKNOWN as cause you run drivers which use dynamic code. Do a Bing/google search if you can find updated drivers. Now open the fileversion.txt and look for the driver version you use. Xperf -I DPC_Interrupt.etl -a fileversion > fileversion.txt To see which driver versions you use run this command: So update the BIOS and change the Power Plan in Windows. if you see ACPI/HAL you may run into power saving feature issues. For usbport.sys, check your chipset and USB device drivers for updates. If the NDIS.sys driver is shown as possible cause, check your (W)LAN drivers for updates. So you can see which driver is the cause. It shows you the same statistic you see in the text file, but it shows you the values in realtime. They can be critical.Īn alternativ to xperf is the tool LatencyMon Look in the dumped text files for µsec values which are over 256µsec. Look here which driver is causing the high CPU usage. Under CPU Usage Summing By Module For the Whole Trace you can see a summary of all DPC usage for each CPU core. Xperf -I DPC_Interrupt.etl -a dpcisr > dpc.txt In your case, you should see the driver which causes the issues.Īn alternative way is to use the xperf commandline tool to dump the values into a text file: The usage comes for me, when I have nearly 100% network speed usage on my 100MBit LAN adapter of my notebook. BE AWARE THAT IT MAY TAKE SOME TIME IF YOU HAVE A SLOW INTERNET CONNECTION)įor me the cause is the NDIS.sys. Now, you have to accept the license agreement to download the public debugging symbols. Now go to the graphs 'DPC CPU Usage' or 'Interrupt CPU Usage' (depending where you high CPU usage) and select the intervall, make a right click and select 'Load Symbols' and next click summary table. Go to 'Trace'->'Configure Symbol Paths' and type in the following: In the next step, make a double click on the etl file to run the Viewer. This closes the trace and writes the result to the file DPC_Interrupt.etl. To stop the trace run the following command: Now wait a time while the high DPC and Interrupt usage occurs. Now open a command prompt with admin rights ( ), go to C: emp (cd emp) and run the following commands:

To get started you need the Windows Performance Tools Kit. Here I will tell you a ) to see which driver causes the high CPU usage and b ) which driver causes the spikes. The developers of the tool try to create a Windows 8 compatible version. Due to internal Kernel changes in Windows 8, the 'DPC Latency Checker tool' shows DPC spikes of over 1000µs all other the time. (Attention: If you use Windows 8, don't use the 'DPC Latency Checker tool'. In Process Explorer/Hacker or you run the DPC Latency Checker tool an see this: Ok, you found this guide, because you see this:

#DPC LATENCY CHECKER INSTAL THE NEW FOR MAC HOW TO#

How to get the cause of high CPU usage by DPC (Deferred Procedure Call) and interrupts?

DPC Latency Checker instal the new for mac