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Search Advanced search…. Everywhere Threads This forum This thread. Search Advanced…. Log in. Category 1 Category 2 Category 3 Category 4. Support UI. X Donate Contact us. New posts Trending Search forums. What's new. New posts New profile posts Latest activity. Current visitors New profile posts Search profile posts Billboard Trophies. Community Question: Have you "cut the cord? Thread starter ThaiNguyen Start date Jul 9, Sidebar Sidebar. Forums Apps Apps General Discussion.
I have xperf installed, but don't know what command to use to make a trace. Is Windows 8. Is BIOS updated? And every driver was reinstalled from there too. And if you mean by " Is Windows 8. Joined Jun 7, Posts 4, Hi, avast!
Remove it and see if it stops. Regards, Patrick. The problem still occurs even though Avast! Type the following command, which will start tracing, in the Command Prompt window you just opened: Code:.
High nvlddmkm.sys DPC latency
Read More:. Run the following command which will stop the tracing: Code:. Run the following command to disable Driver Verifier, which causes the above error: Code:.
Make sure you do not have any programs that capture ETW data already running. Here is the CPU. But the hard pagefault is still high, and some lagg or system hang still occurs. And thank you guys for the help and care.
You're awesome guys. I'm glad to hear it worked. Joined Feb 18, Posts 1. Still have a lot of hard page faults nut not as many as before Wybrem Member. Joined Nov 9, Posts TomasD said:. Joined Dec 20, Posts 8.After updating to LatencyMon associates ntoskrnl. Same results with KB Others are also reporting similar symptoms. It should be easily reproducible.
KB seems to have significantly mitigated the ntoskrnl. This thread is locked. You can follow the question or vote as helpful, but you cannot reply to this thread. Did this solve your problem? Yes No. Sorry this didn't help. I uninstalled Feedback Hub but will install it again later and will provide a link to the bug report. This would also cause streaming videos to stutter then freeze correct?
For stuttering and relatively short freezes it's very possible but it depends on many things like the severity of the latency spike, your PC specs, and how demanding the load is e. Site Feedback. Tell us about your experience with our site. Hi, After updating to LatencyMon associates ntoskrnl. Does anyone at Microsoft acknowledge this?Nvidia's Pascal DPC Latency Investigated.
I have the same question Previous Next. Andre for Directly Independent Advisor. I'm here to help you with your problem. What is the exact make and model? Information in the above link is sourced from a trusted Microsoft MVP blog. Thanks for marking this as the answer. How satisfied are you with this reply? Thanks for your feedback, it helps us improve the site. How satisfied are you with this response? In reply to Andre for Directly's post on May 31, Hi Andre, Firstly, thanks for looking into this.
Let me know if you have any questions. Thanks, Howard. See if these updates improve stability. Thats ok Howard, thanks for your help, will vote on it. In reply to Andre for Directly's post on June 1, Log in Register. Search titles only. Search Filters. What's New. Driver Reference Table. Everywhere Threads This forum This thread.
Important DPC Latency with storport.sys Windows 10 update 1803
In case you are using a WLAN adapter, try disabling it to get better results. Check for BIOS updates. LatencyMon has been analyzing your system for h:mm:ss on all processors. Your CPUs may be throttled back due to variable speed settings and thermal issues. It is suggested that you run a utility which reports your actual CPU frequency and temperature. This includes the scheduling and execution of a DPC routine, the signaling of an event and the waking up of a usermode thread from an idle wait state in response to that event.
The process of resolving the hard pagefault requires reading in the memory from disk while the process is interrupted and blocked from execution. NOTE: some processes were hit by hard pagefaults. If these were programs producing audio, they are likely to interrupt the audio stream resulting in dropouts, clicks and pops. Check the Processes tab to see which programs were hit. Process with highest pagefault count: msmpeng.Since udpdate I have audio crackling sound.
After having checked and updated drivers Driver Easysame problem. I tried to deactivate most of peripherals without succes. Any idea to fix this issue? Did this solve your problem? Yes No. Sorry this didn't help. I'm quite desappointed. I didn't find suitable chipset drivers neither on Dell's site nor on Intel's site for my Dell E laptop. I have installed the last KB but the issue is still there.
Perhaps I have to wait for a future fix from Microsoft? With different tools I'm completely sure that storport. I wrote a mail to Dell support team without any answer yet. I installed all available drivers from Dell's site.
I installed last available Bios. Problem appeared with Win 10 update. I get an answer from Dell. No hope as far as the drivers available on Dell's site are the last for this family of laptops. Perhaps a new release of storport. Site Feedback. Tell us about your experience with our site. Hi, Since udpdate I have audio crackling sound. Thanks in advance. This thread is locked. You can follow the question or vote as helpful, but you cannot reply to this thread.
I have the same question DaveM Independent Advisor. Hi Gerard, storport. Thanks for marking this as the answer.Several days ago my computer started to experience audio stutter for all types of media local audio, local video, browser video, etc. I came across the tool called Latency Mon and discovered that storport. I have not made any changes to my system recently and my system is not overclocked or modified in any way.
I have installed the latest motherboard chipset drivers and run a SFC to ensure system files were intact. I have not had any problems with this system up until now. All disks are reporting normal and have the latest drivers and firmware installed.
This system originally had Windows 7 installed but was upgraded to windows 10 about 2 years ago with no issues. The Latency Mon tool has pointed to the fact that storport. The drive file systems have been cleaned with chkdsk and the drive hardware test results look good. Please check the box to automatically manage paging file size for all drives - DONE. So an interesting thing happened. After rebooting to apply the virtual memory and debug settings, I still had the audio stutter, however I noticed that windows could not see my optical drive, so i rebooted again to get into the bios and checked my settings and confirmed my optical drive could be seen by the BIOS.
I didnt save any settings and booted into windows and now audio is stutter free! I cannot figure out why it is working now but I have rebooted several times and put the computer to sleep several times and the issue has not come back. I dont know if virtual memory setting didnt take the first time, but after the second reboot after making the virtual memory settings, things are fine.
It is the first time in 10 days that the audio stutter issue is gone, so i want to say the last setting changed were the virtual memory and windows debug settings because the step before that was to create a full backup with Macrium.
Just to bump the thread, the issue has been 8 days fixed with no recurrence so far. I have been shutting it down and starting it up daily to try to make the issue reappear, but no such luck that's a good thing.
The supposed solution was taking the computer outside and blowing out the dust because that is all I did. This was done so i could inventory my other components as i prepared to replace the motherboard.
I either knocked something loose or cleaned off a heat sink because things have been fine ever since. Done already, but I have done it again just now.Latest version: LatencyMon v 6. Version 6. LatencyMon checks if a system running Windows is suitable for processing real-time audio and other tasks.
LatencyMon analyzes the possible causes of buffer underruns by measuring kernel timer latencies and reporting DPC and ISR excecution times as well as hard pagefaults. It will provide a comprehensible report and find the kernel modules and processes responsible for causing audio latencies which result in drop outs.
LatencyMon will display the highest latencies of a kernel timer and report the highest execution times of ISR and DPC routines as well as hard pagefaults. In most cases it will also find the drivers and processes responsible for executing them.
It will create a comprehensible report which also displays all sampled data in a detailed manner allowing you to perform in-depth analysis. The audio latency problem. Windows is not a real-time operating system. All requests to the operating system are delivered on a best effort basis.
There are no guarantees whatsoever that requests are delivered within a certain time frame, which are the characteristics of a real-time operating system. That is not a problem for most devices and tasks but this is bad news for audio applications which are considered soft real-time because they need to deliver data to the subsystem and the hardware in buffers several times per second.
If one or more buffers miss their deadlines and are not delivered in time it has audible consequences which are recognized as dropouts, clicks and pops. The Windows thread dispatcher also known as scheduler which is part of the kernel executes threads based on a priority scheme. Threads with higher priority will be given a longer execution time also known as quantum or time slice than threads with a lower priority. However the kernel also knows other types of units of execution known as interrupt service routines ISRs.
Devices connected to the system may interrupt on a connected CPU and cause their interrupt service routines to execute. An interrupt can occur on the same processor that an audio program is running on.
Any thread that was running on the processor on which an interrupt occured will be temporarily halted regardless of its priority. The DPC will most likely run immediately on the same processor which means the audio application will halt until both the ISR and the DPC routines have finished execution.
If execution time gets too high, the audio program may be unable to deliver audio buffers to the hardware in a timely manner. About hard pagefaults. Windows uses a concept of virtual memory which relies on the page translation system provided by the CPU. Whenever a memory address is requested which is not available in physical memory not residentan INT 14 will occur. If the page in which the address resides is known to Windows but not resident, Windows will read in the required page from the page file.
That is known as a hard pagefault and can take a lot of time to complete. If the page can be read in from the hard disk cache, the price will be limited. However if it needs to physically read in the data from disk sectors this takes a lot of time. If an audio program hits a hard pagefault while it is playing it will almost certainly have audible consequences recognized as dropouts, clicks or pops. Hard pagefaults are a very common but often overlooked cause of audio dropouts, clicks and pops.
They especially occur often with audio software that uses a lot of memory such as samplers.
Solutions for avoiding hard pagefaults are increasing the working set of the audio application, increasing the amount of RAM or disabling the pagefile altogether. Note that if you disable the pagefile, the system may run "out of memory" because it does not have the pagefile available to swap memory to.
Also the system will no longer create crash dump files in case of a system crash.