It _might_ not be the FireWire card. Recently I updated the driver for the RealTek PCIe GBE Ethernet card. Everything worked fine, but I saw the same spikes every 5 seconds, even without PowerSDR running. I rolled back the driver, and the problem went away. Neal recently posted something about staying away from these drivers.
73s, Alan WA4SCA -----Original Message----- From: Flexedge [mailto:[email protected]] On Behalf Of Tim Ellison Sent: Friday, February 08, 2013 5:25 AM To: [email protected] Subject: Re: [FlexEdge] Windows 7 DPC CPU usage spikes Sounds like it might the Firewire card itself, as it takes both hardware and software to generate a DPC. It could also be your PCIe bus too. Make sure you have the latest BIOS update for your machine along with the latest mobo chipset drivers too. -Tim On 2/7/2013 5:04 PM, Bill K7UOP wrote: > I recently installed a FireWire card and PowerSDR v2.5.3 on a Windows > 7 machine. The installation was painless and works fine. > > I noticed the CPU % on PowerSDR was periodically jumping from 25% to > 70%. Further investigation showed that whenever I turn on the Flex > 5000 hardware these periodic spikes start occurring (about every 5 sec > or so). PowerSDR does not have to be running. Digging deeper, using > Process Explorer, the spikes in CPU usage are caused by DPC's > (Deferred Procedure Calls). Also saw a reference about being related > to interrupts. There seems to be something happening with the FireWire > card and the radio. > > The FireWire card is a Best Connectivity PCI-Express IEEE 1394b. It > supports up to 800Mbps and is TI chip based (TI XIO2213). I tried all > three drivers available on this machine, TI Compliant, Standard and > the Legacy OHCI. All three work with the radio but all have the same > spikes. > > A friend of mine does not see the problem with his Win 7 Flex > installation. > > Everything works fine and I don't notice any performance degradation > of any programs. But it's an anomally and I would like to see it fixed. > > Any ideas? > > 73, Bill - K7UOP > _______________________________________________ > Flexedge mailing list > [email protected] > http://mail.flex-radio.biz/mailman/listinfo/flexedge_flex-radio.biz > This is the FlexRadio Systems e-mail Reflector called FlexEdge. It is > used for posting topics related to SDR software innovation and other > technical SDR topics. _______________________________________________ Flexedge mailing list [email protected] http://mail.flex-radio.biz/mailman/listinfo/flexedge_flex-radio.biz This is the FlexRadio Systems e-mail Reflector called FlexEdge. It is used for posting topics related to SDR software innovation and other technical SDR topics. _______________________________________________ Flexedge mailing list [email protected] http://mail.flex-radio.biz/mailman/listinfo/flexedge_flex-radio.biz This is the FlexRadio Systems e-mail Reflector called FlexEdge. It is used for posting topics related to SDR software innovation and other technical SDR topics.
