home
products
contribute
download
documentation
forum
Home
Forums
New posts
Search forums
What's new
New posts
All posts
Latest activity
Members
Registered members
Current visitors
Donate
Log in
Register
What's new
Search
Search
Search titles only
By:
New posts
Search forums
Search titles only
By:
Menu
Log in
Register
Navigation
Install the app
Install
More options
Contact us
Close Menu
Forums
HTPC Projects
Software
Operating System
Windows 7 - DPC Latency Spikes
Contact us
RSS
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="doveman" data-source="post: 829180" data-attributes="member: 67412"><p>Thanks, good point. That shows up as VIA Controller so it's easy enough to avoid disabling though.</p><p></p><p>Well I disabled the two Standard Dual Channel PCI IDE Controllers (one of which is off a PCI standard PCI-to-PCI bridge) that don't have anything connected, the 1394 Controller, the AMD 6950 HD Audio, the two USB 3 Controllers, three Standard Enhanced PCI to USB Host Controllers and three Standard OpenHCD USB Host Controllers.</p><p></p><p>I think it's helped lower the average latency, so it's mostly around 100us with some spikes up to 200us, but I'm still getting the occasional spike up to 550us or 1000us. I don't think the drivers stats have really changed much either. I'm not sure how long I'd been monitoring before taking the previous screenshot, but this one was after 0:05:30.</p><p></p><p><a href="http://imageshack.us/photo/my-images/4/latencymonstuffdisabled.png/" target="_blank"><img src="http://img4.imageshack.us/img4/7330/latencymonstuffdisabled.th.png" alt="" class="fr-fic fr-dii fr-draggable " style="" /></a></p><p></p><p>I didn't bother disabling the RAMdisk as I checked and it's using partmgr.sys and RAMDiskVE.sys, not ataport.sys like my real HDD. The only other things I can think of trying are unplugging the USB mouse and keyboard (connected via a KVM) and disabling the Hauppauge tuner, although I do wonder if any of the myriad of options under Advanced for the NIC might have some affect.</p><p></p><p>EDIT: Whilst looking at the NIC I noticed that the Agnitum Firewall Driver (part of Outpost Security Suite) was still enabled for it, although the firewall is shutdown. After unticking that, the tcpip.sys Highest Execution Time has dropped from 0.259ms to 0.199ms and the Highest latency in 0:05:30 was 478us, so hopefully that's fixed it and I don't need to do any more.</p><p></p><p><a href="http://imageshack.us/photo/my-images/718/latencymonagnitumdriver.png/" target="_blank"><img src="http://img718.imageshack.us/img718/7238/latencymonagnitumdriver.th.png" alt="" class="fr-fic fr-dii fr-draggable " style="" /></a></p><p></p><p>Heck, seems I spoke too soon. After 15mins USBPORT.SYS hit 1.3ms and the Highest Latency has spiked to 926us.</p><p></p><p><a href="http://imageshack.us/photo/my-images/198/latencymonhighusb.png/" target="_blank"><img src="http://img198.imageshack.us/img198/701/latencymonhighusb.th.png" alt="" class="fr-fic fr-dii fr-draggable " style="" /></a></p></blockquote><p></p>
[QUOTE="doveman, post: 829180, member: 67412"] Thanks, good point. That shows up as VIA Controller so it's easy enough to avoid disabling though. Well I disabled the two Standard Dual Channel PCI IDE Controllers (one of which is off a PCI standard PCI-to-PCI bridge) that don't have anything connected, the 1394 Controller, the AMD 6950 HD Audio, the two USB 3 Controllers, three Standard Enhanced PCI to USB Host Controllers and three Standard OpenHCD USB Host Controllers. I think it's helped lower the average latency, so it's mostly around 100us with some spikes up to 200us, but I'm still getting the occasional spike up to 550us or 1000us. I don't think the drivers stats have really changed much either. I'm not sure how long I'd been monitoring before taking the previous screenshot, but this one was after 0:05:30. [URL=http://imageshack.us/photo/my-images/4/latencymonstuffdisabled.png/][IMG]http://img4.imageshack.us/img4/7330/latencymonstuffdisabled.th.png[/IMG][/URL] I didn't bother disabling the RAMdisk as I checked and it's using partmgr.sys and RAMDiskVE.sys, not ataport.sys like my real HDD. The only other things I can think of trying are unplugging the USB mouse and keyboard (connected via a KVM) and disabling the Hauppauge tuner, although I do wonder if any of the myriad of options under Advanced for the NIC might have some affect. EDIT: Whilst looking at the NIC I noticed that the Agnitum Firewall Driver (part of Outpost Security Suite) was still enabled for it, although the firewall is shutdown. After unticking that, the tcpip.sys Highest Execution Time has dropped from 0.259ms to 0.199ms and the Highest latency in 0:05:30 was 478us, so hopefully that's fixed it and I don't need to do any more. [URL=http://imageshack.us/photo/my-images/718/latencymonagnitumdriver.png/][IMG]http://img718.imageshack.us/img718/7238/latencymonagnitumdriver.th.png[/IMG][/URL] Heck, seems I spoke too soon. After 15mins USBPORT.SYS hit 1.3ms and the Highest Latency has spiked to 926us. [URL=http://imageshack.us/photo/my-images/198/latencymonhighusb.png/][IMG]http://img198.imageshack.us/img198/701/latencymonhighusb.th.png[/IMG][/URL] [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
HTPC Projects
Software
Operating System
Windows 7 - DPC Latency Spikes
Contact us
RSS
Top
Bottom