High CPU Usage with DVR-A07XL in USB Enclosure - Club CDFreaks

sonyman · 16-09-2004

The CPU usage is extremely high, so high that DVD movie playback is choppy. At 8x CPU usage is up to 100%, 4x 50%, and so on. Is there anything I can do?

Scott

*dhc014* · 17-09-2004

Get a better enclosure?

horobiru · 20-09-2004

It's common for external USB devices to use quite a few CPU cycles. I don't know what's normal, however.

My USB hard drive at full tilt pushes my CPU quite a bit.

The only solution I can think of would be to see whether some USB cards do more processing before it gets to the processor. But I'm purely guessing.

sonyman · 21-09-2004

It is just a generic enclosure from CompUSA that I bought 2 years ago. If I can scrounge up some cash I will pick up a better one. Thanks.

Scott

titan97 · 21-09-2004

If I understand the USB I/O prrocess correctly, everything that goes through to the USB ports has to get pushed through the CPU first (ie no DMA-type features). So if you have a slower CPU, you might see a higher CPU usage percentage. I may be wrong here as well, but I think that IEEE1394 (aka Firewire) has a smaller CPU overhead requirement.

16-09-2004	#1 (permalink)
sonyman CD Freaks Rookie Join Date: Nov 2002 Posts: 41	High CPU Usage with DVR-A07XL in USB Enclosure <a href='http://adstats.cdfreaks.com/www/delivery/ck.php?n=a13febf7&cb=INSERT_RANDOM_NUMBER_HERE' target='_blank'><img src='http://adstats.cdfreaks.com/www/delivery/avw.php?zoneid=30&cb=INSERT_RANDOM_NUMBER_HERE&n=a13febf7' border='0' alt='' /></a> The CPU usage is extremely high, so high that DVD movie playback is choppy. At 8x CPU usage is up to 100%, 4x 50%, and so on. Is there anything I can do? Scott __________________ Sony DRU-500A Pioneer DVR-108 Pioneer DVR-A07XL Lite-On LTR-52327S Lite-On LTR-52246S Lite-On LTR-48125W

17-09-2004	#2 (permalink)
dhc014 Retired Moderator Join Date: Jun 2002 Posts: 4,353	Re: High CPU Usage with DVR-A07XL in USB Enclosure Get a better enclosure? __________________ .:: Dave \| http://dhc014.rpc1.org ::.

20-09-2004	#3 (permalink)
horobiru New on Forum Join Date: Aug 2004 Posts: 26	Re: High CPU Usage with DVR-A07XL in USB Enclosure It's common for external USB devices to use quite a few CPU cycles. I don't know what's normal, however. My USB hard drive at full tilt pushes my CPU quite a bit. The only solution I can think of would be to see whether some USB cards do more processing before it gets to the processor. But I'm purely guessing.

21-09-2004	#4 (permalink)
sonyman CD Freaks Rookie Join Date: Nov 2002 Posts: 41	Re: High CPU Usage with DVR-A07XL in USB Enclosure It is just a generic enclosure from CompUSA that I bought 2 years ago. If I can scrounge up some cash I will pick up a better one. Thanks. Scott __________________ Sony DRU-500A Pioneer DVR-108 Pioneer DVR-A07XL Lite-On LTR-52327S Lite-On LTR-52246S Lite-On LTR-48125W

21-09-2004	#5 (permalink)
titan97 New on Forum Join Date: Sep 2004 Location: San Diego, CA Posts: 10	Re: High CPU Usage with DVR-A07XL in USB Enclosure If I understand the USB I/O prrocess correctly, everything that goes through to the USB ports has to get pushed through the CPU first (ie no DMA-type features). So if you have a slower CPU, you might see a higher CPU usage percentage. I may be wrong here as well, but I think that IEEE1394 (aka Firewire) has a smaller CPU overhead requirement.

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