Hi Les, Same situation experienced here on Saturday Afternoon after my upgrade to W8 Pro..... Running an Intel Quad Core CPU which previously performed very well on W7.
After booting W8 - (at least for the first 15-30 minutes), The 5000A (under PSDR 2.4.4) really battles to stabilize. It got so bad at times that the audio just died completely. When checking the DPC Counters, I noticed the counters above > 1000 (and as high as >10000), incrementing occasionally.....I never noticed this before when running W7 I have already managed some improvement by performing a general clean-up of Processes, Services and applications on the PC. I now only Power-off or reset the PC when I really have to and things are going relatively OK but I am still monitoring the PC's latency on a regular basis ...... I am considering moving back to W7 again. Waiting to see what experience other Flexers are having with W8. Thank you for taking the time to raise this. 73 de Koos ZS6BFD -----Original Message----- From: FlexRadio [mailto:flexradio-boun...@flex-radio.biz] On Behalf Of Les Keppie Sent: 29 October 2012 10:02 To: flexe...@flex-radio.biz; flexradio@flex-radio.biz Subject: [Flexradio] Problem with high DPC count after upgrading to W8 Pro Hi All Have just upgraded from Windows 7 Ultimate to Windows 8 Pro Computer is Asus m/b M4A78-VM - processor is 3.1g AMD Phenom(tm) II X2 550 Processor Socket AM3 (938) with 4g ram - radio is Flex 3000 This system has been running well on W7 ultimate with dpc count of less than 100us normally around the 75us Now with the upgrade to W8 Pro dpc is around 1000us LatencyMon reports Current measured kernel timer latency around 12 to 16us with Highest measured kernel timer latency as 1000 to 1009us Transmitting using EasyPal gives regular breaks in tx audio with receiving station reporting no lock on signal Anyone got any ideas on how to reduce the dpc spikes or will it be a trip down the W7 reinstallation path??? So far have not been able to work out if it is possible to uninstall W8 back to W7 I have an image of the system from september 9 but W8 doesnt want to know about it Regards Les VK2DSG _______________________________________________ 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.flexradio.com/ Homepage: http://www.flexradio.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.flexradio.com/ Homepage: http://www.flexradio.com/
