DPC Latency. I know! There have been others.

FrayedEndsOfSanity

Honorable
Jul 4, 2013
19
0
10,520
I am having seriously high DPC issues stemming from multiple places. Ive tried everything I can find from serious to stupidity to doing a chant and tribal dance to the gods around this laptop.
Disabling:
Sound, Network Card, USB mouse, DVD player etc.. to no avail. formatted and freshed in a new Win 7 64
still the same, Flashed BIOS back to what it was when I bought this a yr and some ago. Still the same. All updated drivers (tried origional drivers from HP too)
I havent even tickled the problem.

HP Pavillion g6-1d40ca
Windows 7 Home Prem. 64bit
AMD A4-3305m Radeon HD 6480g 512mem.
2 gig DDR3
4 gig DDR3
USB MS Wireless Mobile Mouse 4000
IDT PC Audio
Insyde F.48 Bios
Newest drivers I can find anywhere (2011 & 12 most (except New Vid Drivers))
Wireless disabled, Cat5'd directly into Shaw cable modem.
Plugged into wall power 24/7

HdAudBus.sys
storport.sys
ACPI.sys
i8042prt.sys
ndis.sys
USBPORT.sys

just some of the ones that I could catch. There is one thing thats funny tho. in LatencyMon's Stats report I get this:
Reported CPU speed: 1896.0 MHz
Measured CPU speed: 935.0 MHz (approx.)
Which is odd because I have Cool & Quiet Disabled and Catalyst Control Center as well as Core Temp both show my processors at 100% so thee should be no throttling going on.

Drivers_zps5cba5b0a.jpg

LowerThanNormalHere_zps2c9ce304.png


 

FrayedEndsOfSanity

Honorable
Jul 4, 2013
19
0
10,520
Highest measured interrupt to process latency (µs): 31162.270624
Highest measured interrupt to DPC latency (µs): 287.466703
Highest ISR routine execution time (µs): 212.419304
Driver with highest ISR routine execution time: USBPORT.SYS - USB 1.1 & 2.0 Port Driver, Microsoft Corporation
Highest reported total ISR routine time (%): 0.077562
Driver with highest ISR total time: HDAudBus.sys - High Definition Audio Bus Driver, Microsoft Corporation
Total time spent in ISRs (%) 0.186718
ISR count (execution time <250 µs): 68392
ISR count (execution time 250-500 µs): 0
ISR count (execution time 500-999 µs): 0
ISR count (execution time 1000-1999 µs): 0
ISR count (execution time 2000-3999 µs): 0
ISR count (execution time >=4000 µs): 0
Highest DPC routine execution time (µs): 780.640295
Driver with highest DPC routine execution time: ndis.sys - NDIS 6.20 driver, Microsoft Corporation
Highest reported total DPC routine time (%): 0.376892
Driver with highest DPC total execution time: USBPORT.SYS - USB 1.1 & 2.0 Port Driver, Microsoft Corporation
Total time spent in DPCs (%) 0.644123
DPC count (execution time <250 µs): 265530
DPC count (execution time 250-500 µs): 0
DPC count (execution time 500-999 µs): 2
DPC count (execution time 1000-1999 µs): 0
DPC count (execution time 2000-3999 µs): 0
DPC count (execution time >=4000 µs): 0
Process with highest pagefault count: firefox.exe
Total number of hard pagefaults 876
Hard pagefault count of hardest hit process: 249
Highest hard pagefault resolution time (µs): 64116.262658
Total time spent in hard pagefaults (%): 1.190133
Number of processes hit: 12

CPU 0 Interrupt cycle time (s): 2.171811
CPU 0 ISR highest execution time (µs): 66.045886
CPU 0 ISR total execution time (s): 0.177357
CPU 0 ISR count: 38220
CPU 0 DPC highest execution time (µs): 780.640295
CPU 0 DPC total execution time (s): 0.672531
CPU 0 DPC count: 194044
CPU 1 Interrupt cycle time (s): 2.777229
CPU 1 ISR highest execution time (µs): 212.419304
CPU 1 ISR total execution time (s): 0.474183
CPU 1 ISR count: 30172
CPU 1 DPC highest execution time (µs): 249.857595
CPU 1 DPC total execution time (s): 1.575097
CPU 1 DPC count: 71488

 

Simon1979

Reputable
Dec 6, 2014
1
0
4,510
Hi. I have same high latency on HP pavillion g6 laptop (2309), and the culprit according to LatencyMon is the USBPORT.SYS driver. Only seems to be an issue when 2 things are connected to the USB ports (midi controller and USB external HD). Any fixes please?
 


Yeah, update the drivers for those products or stop using them them. It's most likely the MIDI controller.