p5kpl-am epu and slipped buffers

[Willem Krabbe]

Hi all,

I have a problem with slipped output buffers (not yet audible).
I followed the tweaking windows XP tips of Bob, stopped unwanted processes, no virusscanner.


Fast changing with Fkeys doens't seem to be te reason, what could me the reason for this behaviour?

I can't find the ahci stuff in my bios.


I changed my gear from a P4-3 GHZ to the following config:
---
Mainboard P5KPL-AM EPU (with onboard Intel G33/G31 Express chipset)
Proccessor Core2Duo E8400 @ 3 Ghz
Memory 2x2GB
2 Harddisks
SATA2 OCZ-VERTEX2
SATA4 Maxtor 6V320F0
PCI HDSP 9652
Behringer ADA8000 2x (one more to come)
BCF 2000 Faderpack
SAC remote on my other desktop PC
---

Added /onecpu to boot.ini (In the devices I can see the 2 cores, in windos taskmanager I only see one graphic of the CPU. When I start without /onecpu i can see two graphs of cpu history.)

Config
I used the 24 channel template with
1 FOH 4 MON mixes
All 24 channel have EQ, Compressor en Limiter enabled on all 5 mixes
vst player on channel 2 for playing mp3 for testing
30% load
54 slipped buffers output (not yet audible) in les than 20 minutes.

DSP settings
Buffer size 64
Sample Rate 44100
Clock Internal

Audiodriver is Asio Protocol
Preload buffers 2
Buffer size 64 samples

---
Bios settings:
Bios Version 0501
ATA/IDE Configuration Enhanced Other options are: Disabled/Compatible
S-ata

CPU Speedstep Disabled

Nort Bridge Chipset
Memory Remap Feature Disabled
(Enabled: Allow remapping of overlapped PCI memory above the total physical memory)

Video Function
Fixed DVMT
256MB

South Bridge Chipset
Azalia
AC97

Power
ACPI 2.0 Enabled
ACPI APIC support Enabled
---

processes (24)
1 alg.exe
2 csrss.exe
3 ctfmon.exe
4 explorer.exe
5 hdsp32.exe
6 hdspmix.exe
7 hkcmd.exe
8 igfxpers.exe
9 igfxsrvc.exe
10 lsass.exe
11 sac.exe
12 services.exe
13 smss.exe
14 spoolsv.exe
15 svchost.exe
16 svchost.exe
17 svchost.exe
18 svchost.exe
19 svchost.exe
20 svchost.exe
21 system.exe
22 taskmgr.exe
23 winlogon.exe
24 wmiprvse.exe

[gdougherty]

Make sure you've got your memory sticks in the dual channel configuration. That was recently mentioned as a culprit for one user.

Check your IRQ's and see if the HDSP is sharing with anything else. If so, try alternate PCI slots to see if it improves. Could be an overlap with the network or video card.

[Willem Krabbe]

Thanks gdougherty,

I noticed that de hdsp had a shared irq with the ide sata controller.
Tried the other PCI slot and it has now it's own IRQ (20).
Still having slipped buffers (stil unaudible).

I'm gonna build the pc in the Rack with it's own local network (without internet) and see if that's gonna help.

Willem

[ttako]

Thanks gdougherty,

I noticed that de hdsp had a shared irq with the ide sata controller.
Tried the other PCI slot and it has now it's own IRQ (20).
Still having slipped buffers (stil unaudible).

I'm gonna build the pc in the Rack with it's own local network (without internet) and see if that's gonna help.

Willem

Dear Willem,

Please make sure, that the highest priority is checked (realtime priority)
Make sure, the Sample rate is the same as in the Hardware (in its own driver setup)
Make sure what causes the slipped buffers? (if you dont touch anything, nor you change views, does slipped buffer come as well?)

What is the DPC latency checker show on your pc?? (without running any app)
Sometimes USB keyboard and/or mouse can also make bad things....
Try PS2 type...

Hope you find the perfect setup soon :-)

Good Luck,

Tamas

[JeremyJo]

I was the one with the memory config set to single channel - when I switched the memory sticks to operate in dual channel mode everything worked very well.

On the motherboard I have, all slots are black and the print on the board was confusing to me. A solid read through the motherboard manual showed me that the memory sticks needed to be in alternating slots to enable dual channel mode.

The BIOS confirmed that setting , so you should be able to see some indicator of memory configuration without booting into Windows (in fact, I don't think Windows tells you anything about dual or single channel memory mode).

AND, looking through your configuration notes, I don't see where Hyperthreading was specifically disabled; that's another BIOS setting (if available). Make sure Hyperthreading is DISabled and you SHOULD see only one processor window in Task Manager with the /one CPU setup.

I disabled two of four cores on the i5 in BIOS and now Task Manager shows two processors. I also disabled Hyperthreading and Speedstep as well as VM (something or other) in BIOS.

Take another trip through the BIOS setting and see if that helps.

JJ

[JeremyJo]

... Also I'd start with both cores ENabled (don't use the /ONE CPU switch until you have tried the other settings)

JJ