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
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_______________________________________________
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.
