Occasional long duration DPCs in the 1500 us range is about the max you want to have. If they are not frequent, then you have nothing to worry about. If they are frequent, increase the Firewire driver operation mode to SafeMode 2 and start hunting down which hardware component is responsible. Network cards and disk controller are the primary culprits. Sometime BIOS upgrades fix the problems too.
-Tim -----Original Message----- From: flexradio-boun...@flex-radio.biz [mailto:flexradio-boun...@flex-radio.biz] On Behalf Of N4PY2 Sent: Tuesday, June 02, 2009 8:44 PM To: Flex Subject: [SPAM] Re: [Flexradio] How to force IRQ's (Question) Just out of curiosity, how much latency when running the DPC checker is too much. Mine usually runs about 180 usec but once in a while it gets as high as 1100 usec. I'm just looking for a number and a correlation to buffer size setting and sample rate. Right now I'm running 96000 with a 2048 buffer and things seem pretty good. Carl Moreschi N4PY 121 Little Bell Drive Bell Mountain Hays, NC 28635 ----- Original Message ----- From: "Steven O'Neal" <se_on...@hotmail.com> To: <mlun...@nc.rr.com>; "Flex" <flexradio@flex-radio.biz> Sent: Tuesday, June 02, 2009 8:38 PM Subject: Re: [Flexradio] How to force IRQ's (Question) Mark, To look at what IRQ's are shared Control Pane>> System Properties>>Hardware>>Device Manager View Resources by connection Interrupt request brings up a list which shows what is on what IRQ. To look at what your Delays are like Launch Flex Driver ICON looks like a Computer with a FIREWIRE SYMBOL (Get the driver from the Flex Site if you do not have it, latest version) Global Settings (Third Button at top from Right) Click Enable DPC Latency Checker Let run for 5 minutes and you should see what your latency is doing. Hope that helps. > From: mlun...@nc.rr.com > To: se_on...@hotmail.com; flexradio@flex-radio.biz > Subject: RE: [Flexradio] How to force IRQ's (Question) > Date: Tue, 2 Jun 2009 20:24:14 -0400 > > Hoo boy. I would also like to tune up my system. > > 1. I see my Firewire card is IRQ 17. Where do I go to look for conflicts? > 2. Using v1.18, but I don't see F3K as an option, only SDR1000, F5K, and > demo. Something I am doing wrong? > 3. What is DPC check, and how do I run it? Sounds like an important > parameter... > > Thanks > > > Mark Lunday > WD4ELG > wd4...@arrl.net > http://wd4elg.net > > > -----Original Message----- > From: flexradio-boun...@flex-radio.biz > [mailto:flexradio-boun...@flex-radio.biz] On Behalf Of Steven O'Neal > Sent: Tuesday, June 02, 2009 8:11 PM > To: Flex > Subject: [Flexradio] How to force IRQ's (Question) > > > I'm tuning up my system in anticipation of the arrivial of my new Flex > 3000 > and have a question about forcing IRQ's. > > Seems my Video card and my Firewire card are sharing an IRQ, number 16. > > When I go into control panel the settings for the firewire card are greyed > out, Plug and Pray? > > Firing up the Flex Firewire driver and running with DPC check enabled, I'm > pretty low, but getting a peak of 1724 us after about 5 minutes of run > time. > Normal is around 6 to low 100's on delay. > > So question is, anyone know how to force the IRQ of my Firewire up to > something like IRQ 18. I have not triied the shutdown and move the card to > a > different slot, and Bios does not seem to offer any options to tweak. > > Comments suggestions. > > _________________________________________________________________ > Lauren found her dream laptop. Find the PC that's right for you. > http://www.microsoft.com/windows/choosepc/?ocid=ftp_val_wl_290 > _______________________________________________ > FlexRadio Systems Mailing List > FlexRadio@flex-radio.biz > http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz > Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ > Knowledge Base: http://kc.flex-radio.com/ Homepage: > http://www.flex-radio.com/ > _________________________________________________________________ Insert movie times and more without leaving Hotmail(r). http://windowslive.com/Tutorial/Hotmail/QuickAdd?ocid=TXT_TAGLM_WL_HM_Tutorial_QuickAdd_062009 _______________________________________________ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flex-radio.com/ Homepage: http://www.flex-radio.com/ _______________________________________________ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flex-radio.com/ Homepage: http://www.flex-radio.com/ _______________________________________________ FlexRadio Systems Mailing List FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/ Knowledge Base: http://kc.flex-radio.com/ Homepage: http://www.flex-radio.com/
